OVR: Show mirror of single eye only
[mercenary-reloaded.git] / src / mercenary / main.c
index f6d3707..45d87e4 100644 (file)
 #include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
+#include <math.h>
 #include <sys/stat.h>
 #include <sys/types.h>
+#include "../../include/keycodes.h"
 #include "../libsdl/sdl.h"
-#include "../libsdl/opengl.h"
+#ifdef HAVE_OVR
+#include "../libovr/ovr.h"
+#include "../libovr/keyboard.h"
+#endif
+#include "../libopengl/opengl.h"
 #include "../libsdl/print.h"
 #include "../libcpu/m68k.h"
 #include "../libcpu/execute.h"
 #define FOV_JOLLY      80.0
 #define FOV_MAX                170.0
 
+#define STICK_WALK_THRESHOLD 0.3 /* move the stick until the player moves */
+#define STICK_ROTATE_THRESHOLD 0.3 /* move the stick until the player rotates */
+#define STICK_THRUST_THRESHOLD 0.1 /* move the stick until the craft moves */
+
 static int config_ctrl_c = 0;
-static int config_amiga_speed = 1;
-static double config_fps = 16.0;
+static int config_amiga_speed = 0; /* fast speed */
+static double config_fps = 10.0;
 #if !defined(_WIN32)
 static const char *config_gamesave_dir = ".mercenary";
 #endif
 static int config_video_filter = 1;
 static int config_audio_filter = 1;
-static int config_render = 0;
+static int config_render = 1; /* opengl render */
 static int config_skip_intro = 0;
-static int config_multisampling = 16;
-static double config_fov = FOV_NOVAGEN;
+static int config_multisampling = 8;
+static int config_joystick = -1, config_joystick_x = -1, config_joystick_y = -1, config_joystick_fire = -1;
+#ifdef HAVE_OVR
+static double config_benson_size = 0.7;
+static double config_fov = FOV_JOLLY;
+#else
 static double config_benson_size = 1.0;
+static double config_fov = FOV_NOVAGEN;
+#endif
+static double config_monitor_distance = 41.5; /* inch */
+#ifdef HAVE_OVR
+static double config_keyboard_distance = 38.5; /* inch */
+static double config_keyboard_height = -26.0; /* inch */
+#endif
 static int config_debug_transparent = 0;
 static int config_debug_opengl = 0;
 /* render improvements */
 static int config_improve_extend_roads = 1;    /* set to 1 to extend roads */
+static int config_improve_smooth_planets = 1;  /* set to 1 to rotate planets smoothly */
+static int config_improve_stars_rotation = 1;  /* set to 1 to improve star rendering */
+static int config_improve_fix_sky_rotation = 0;        /* set to 1 to fix sky rotation */
+static int config_improve_round_planets = 0;   /* set to 1 to make planets exactly round */
 
 #define CPU_SPEED      7093790.0;
 
@@ -84,12 +109,13 @@ static int config_improve_extend_roads = 1;        /* set to 1 to extend roads */
 static uint8_t *memory = NULL;
 static uint8_t *stop_event = NULL;
 static uint8_t *image = NULL;
-static uint8_t *help_osd = NULL;
+static uint8_t *help_osd[3] = { NULL, NULL, NULL };
 static uint8_t *info_osd = NULL;
 static int help_view = 1;
-static int32_t osd_timer = 0;
-#define SCREEN_WIDTH   320
-#define SCREEN_HEIGHT  200
+static int help_views = 0;
+static int32_t osd_timer = 0, border_timer = 0;
+#define SCREEN_WIDTH   (320*3)
+#define SCREEN_HEIGHT  (200*3)
 #define IMAGE_WIDTH    320
 #define IMAGE_HEIGHT   200
 #define BENSON_AT_LINE 136
@@ -108,6 +134,8 @@ static int render_legacy = 0; /* render original amiga screen, if set */
 static int render_improved = 0; /* render improved image, if set */
 static int debug_opengl = 0; /* render both, amiga screen and  improved image, if set */
 static int intro_skipped = 0; /* indicated if we already have landed */
+static int window_width, window_height;
+static int mission_disk = 0;
 
 static const char *home_dir;
 
@@ -119,6 +147,7 @@ int parse_args(int argc, char *argv[])
 
        while (argc > i) {
                if (!strcmp(argv[i], "-h") || !strcmp(argv[i], "--help")) {
+                       /*          |                                                                             | */
                        print_info("Usage: %s\n", argv[0]);
                        print_info(" -s --render-speed original | fast\n");
                        print_info("        Set speed of rendering to original Amiga or fast speed.\n");
@@ -138,6 +167,34 @@ int parse_args(int argc, char *argv[])
                        print_info("        Set field-of-view. Default is %.0f.\n", FOV_NOVAGEN);
                        print_info(" -i --skip-intro\n");
                        print_info("        Skip intro sequence approaching to Eris space port.\n");
+                       print_info(" -j --joystick <num> | list\n");
+                       print_info("        Select given joystick number or show list. (default = 0, if available)\n");
+                       print_info("    --joystick-x <axis num>\n");
+                       print_info("    --joystick-y <axis num>\n");
+                       print_info("    --joystick-fire <button num>\n");
+                       print_info("        Specify explicit axis and button of joystick.\n");
+                       print_info("Improvement options:\n");
+                       print_info("    --extend-roads 1 | 0\n");
+                       print_info("        Roads in the distance end in a single point. This was ok for low\n");
+                       print_info("        resolution, but for OpenGL we want equal width all the way.\n");
+                       print_info("        This requires OpenGL rendering. (default = %d)\n", config_improve_extend_roads);
+                       print_info("    --smooth-planets 1 | 0\n");
+                       print_info("        Planet's rotation uses integer value, so they judder in the original\n");
+                       print_info("        game rendering. This option requires OpenGL rendering. (default = %d)\n", config_improve_smooth_planets);
+                       print_info("    --stars-rotation 1 | 0\n");
+                       print_info("        Stars are rendered originally by using a fast routine. Use this option\n");
+                       print_info("        to make them render on a sphere. They also rotate with the sky then.\n");
+                       print_info("        This requires OpenGL rendering and is default with VR. (default = %d)\n", config_improve_stars_rotation);
+                       print_info("    --fix-sky-rotation 1 | 0\n");
+                       print_info("        Sky rotates in the wrong direction, if flying over planet. This is\n");
+                       print_info("        fixed by rotating all sky object by 180 degrees. The original (wrong)\n");
+                       print_info("        rotation is default, because it preserves the game's spirit!\n");
+                       print_info("        This option requires OpenGL rendering. (default = %d)\n", config_improve_fix_sky_rotation);
+                       print_info("    --round-planets 1 | 0\n");
+                       print_info("        The original game renders planets and explosion debris horizontally\n");
+                       print_info("        stretched. This compensates the vertical stretch of NTSC vs PAL video.\n");
+                       print_info("        The original (stretched) sphere makes the game authentic.\n");
+                       print_info("        This option requires OpenGL rendering. (default = %d)\n", config_improve_round_planets);
                        print_info("Debug options:\n");
                        print_info(" -o --debug-opengl\n");
                        print_info("        Use split screen to display both Amiga and OpenGL rendering.\n");
@@ -240,6 +297,64 @@ illegal_parameter:
                if (!strcmp(argv[i], "-i") || !strcmp(argv[i], "--skip-intro")) {
                        config_skip_intro = 1;
                } else
+               if (!strcmp(argv[i], "-j") || !strcmp(argv[i], "--joystick")) {
+                       i++;
+                       if (argc == i)
+                               goto missing_parameter;
+                       if (!strcmp(argv[i], "list")) {
+                               sdl_list_joysticks();
+                               return 1;
+                       }
+                       config_joystick = atoi(argv[i]);
+               } else
+               if (!strcmp(argv[i], "--joystick-x")) {
+                       i++;
+                       if (argc == i)
+                               goto missing_parameter;
+                       config_joystick_x = atoi(argv[i]);
+               } else
+               if (!strcmp(argv[i], "--joystick-y")) {
+                       i++;
+                       if (argc == i)
+                               goto missing_parameter;
+                       config_joystick_y = atoi(argv[i]);
+               } else
+               if (!strcmp(argv[i], "--joystick-fire")) {
+                       i++;
+                       if (argc == i)
+                               goto missing_parameter;
+                       config_joystick_fire = atoi(argv[i]);
+               } else
+               if (!strcmp(argv[i], "--extend-roads")) {
+                       i++;
+                       if (argc == i)
+                               goto missing_parameter;
+                       config_improve_extend_roads = atoi(argv[i]);
+               } else
+               if (!strcmp(argv[i], "--smooth-planets")) {
+                       i++;
+                       if (argc == i)
+                               goto missing_parameter;
+                       config_improve_smooth_planets = atoi(argv[i]);
+               } else
+               if (!strcmp(argv[i], "--stars-rotation")) {
+                       i++;
+                       if (argc == i)
+                               goto missing_parameter;
+                       config_improve_stars_rotation = atoi(argv[i]);
+               } else
+               if (!strcmp(argv[i], "--fix-sky-rotation")) {
+                       i++;
+                       if (argc == i)
+                               goto missing_parameter;
+                       config_improve_fix_sky_rotation = atoi(argv[i]);
+               } else
+               if (!strcmp(argv[i], "--round-planets")) {
+                       i++;
+                       if (argc == i)
+                               goto missing_parameter;
+                       config_improve_round_planets = atoi(argv[i]);
+               } else
                if (!strcmp(argv[i], "-o") || !strcmp(argv[i], "--debug-opengl")) {
                        config_debug_opengl = 1;
                } else
@@ -258,6 +373,328 @@ illegal_parameter:
        return 0;
 }
 
+static void osd_info(const char *param, const char *value)
+{
+       char line[41] = "                                        ";
+
+       if (param[0]) {
+               strncpy(line + 21 - strlen(param), param, strlen(param));
+               line[22] = ':';
+       }
+       if (strlen(value) > 15) {
+               print_error("string too long\n");
+               return;
+       }
+       strncpy(line + 25, value, strlen(value));
+       text_render(info_osd, OSD_WIDTH, OSD_HEIGHT, line, 0x00, 4, 0, 0, 1);
+       osd_timer = ticks_sdl() + 2500;
+}
+
+static void toggle_help(void)
+{
+       if (help_view == 0)
+               help_view = 2;
+       else
+       if (help_view == help_views)
+               help_view = 0;
+       else
+               help_view++;
+}
+
+static void resize_window(int width, int height)
+{
+       window_width = width;
+       window_height = height;
+       border_timer = ticks_sdl() + 1500;
+       osd_info("", "window resized");
+}
+
+#ifdef HAVE_OVR
+static int __attribute__((unused)) button_a_last = 0, button_b_last = 0, button_x_last = 0, button_y_last = 0, button_menu_last = 0, button_left_trigger_last = 0, button_right_trigger_last = 0, button_left_thumb_last = 0, button_right_thumb_last = 0;
+static double __attribute__((unused)) stick_left_x_last = 0.0, stick_left_y_last = 0.0, stick_right_x_last = 0.0, stick_right_y_last = 0.0;
+static int thrust_last = 0;
+static int joystick_set_x_last = 0, joystick_set_y_last = 0;
+static int keyboard_on = 0;
+static enum keycode vr_key_pressed = 0, vr_key = 0;
+static int we_walk = 0, we_rotate = 0;
+static double degrees45 = 45.0 / 180.0 * M_PI;
+
+static void handle_vr_poses(void)
+{
+       int button_a = 0, button_b = 0, button_x = 0, button_y = 0, button_menu = 0, button_left_trigger = 0, button_right_trigger = 0, button_left_thumb = 0, button_right_thumb = 0;
+       double hand_right_x = 0.0, hand_right_y = 0.0, hand_right_z = 0.0;
+       double hand_right_yaw = 0.0, hand_right_pitch = 0.0, hand_right_roll = 0.0;
+       double head_yaw = 0.0, head_pitch = 0.0, head_roll = 0.0;
+       double stick_left_x = 0.0, stick_left_y = 0.0, stick_right_x = 0.0, stick_right_y = 0.0;
+       int thrust = thrust_last;
+       int joystick_set_x = 0, joystick_set_y = 0;
+       static uint32_t current_time, last_time = 0, diff;
+       static double increment, inc_count = 0.0;
+
+       /* handle input */
+       get_poses_ovr(&button_a, &button_b, &button_x, &button_y, &button_menu, &button_left_trigger, &button_right_trigger, &button_left_thumb, &button_right_thumb, &hand_right_x, &hand_right_y, &hand_right_z, &hand_right_yaw, &hand_right_pitch, &hand_right_roll, &stick_left_x, &stick_left_y, &stick_right_x, &stick_right_y, &head_yaw, &head_pitch, &head_roll);
+       if (button_a && !button_a_last) {
+               /* menu toggle */
+               toggle_help();
+       }
+       if (button_b && !button_b_last) {
+               /* reset observer */
+               reset_observer_ovr();
+               osd_info("", "reset observer");
+       }
+       if (button_x && !button_x_last) {
+               /* menu toggle */
+               toggle_help();
+       }
+       if (button_y && !button_y_last) {
+               /* reset observer */
+               reset_observer_ovr();
+               osd_info("", "reset observer");
+       }
+       if (!help_view) {
+               if (button_right_trigger && !button_right_trigger_last) {
+                       /* trigger pressed */
+                       if (keyboard_on) {
+                               if (vr_key) {
+                                       vr_key_pressed = vr_key;
+                                       set_amiga_key(vr_key_pressed, 1);
+                                       /* reset vr thrust */
+                                       thrust = 0;
+                               }
+                       } else {
+                               /* fire button */
+                               set_joystick(-1, -1, -1, -1, 1);
+                       }
+               }
+               if (!button_right_trigger && button_right_trigger_last) {
+                       /* trigger released */
+                       set_joystick(-1, -1, -1, -1, 0);
+                       if (vr_key_pressed) {
+                               set_amiga_key(vr_key_pressed, 0);
+                               vr_key_pressed = 0;
+                       }
+               }
+               /* joystick */
+               /* reset moving state, so the game is not influenced before we want to */
+               mercenary_vr_move(0, NULL, NULL, 256, 256);
+               joystick_set_x = 0;
+               joystick_set_y = 0;
+               if (!mercenary_get_info_walking()) {
+                       /* turn right and left when not walking */
+                       if (stick_right_x > STICK_ROTATE_THRESHOLD) {
+                               set_joystick(0, 1, -1, -1, -1);
+                               joystick_set_x = 1;
+                       } else
+                       if (stick_right_x < -STICK_ROTATE_THRESHOLD) {
+                               set_joystick(1, 0, -1, -1, -1);
+                               joystick_set_x = 1;
+                       }
+                       /* pitch craft */
+                       if (stick_right_y > STICK_WALK_THRESHOLD) {
+                               set_joystick(-1, -1, 1, 0, -1);
+                               joystick_set_y = 1;
+                       } else
+                       if (stick_right_y < -STICK_WALK_THRESHOLD) {
+                               set_joystick(-1, -1, 0, 1, -1);
+                               joystick_set_y = 1;
+                       }
+                       if (joystick_set_x || joystick_set_y) {
+                               mercenary_vr_move(0, NULL, NULL,
+                                       256,
+                                       (int)(256.0 * fabs(stick_right_y) - STICK_WALK_THRESHOLD / (1.0 - STICK_WALK_THRESHOLD) + 0.5));
+                       }
+               } else {
+                       double roll, pitch, yaw;
+                       double tilt, dir, east, north;
+                       int32_t move_east[4], move_north[4];
+
+                       tilt = sqrt(stick_right_x * stick_right_x + stick_right_y * stick_right_y);
+
+                       /* check if we rotate, walk or rest */
+                       if (we_rotate == 0 && we_walk == 0) {
+                               /* we rest */
+                               if (fabs(stick_right_y) > fabs(stick_right_x) && tilt > STICK_WALK_THRESHOLD)
+                                       we_walk = 1;
+                               if (fabs(stick_right_x) > fabs(stick_right_y) && tilt > STICK_ROTATE_THRESHOLD)
+                                       we_rotate = 1;
+                       } else if (we_walk) {
+                               /* we walk */
+                               if (tilt < STICK_WALK_THRESHOLD) {
+                                       we_walk = 0;
+                                       /* we need to stop right here and not continue until next rendering */
+                                       set_joystick(-1, -1, 0, 0, -1); /* stop y */
+                                       reset_joystick(); /* commit stop */
+                               }
+                       } else {
+                               /* we rotate */
+                               if (tilt < STICK_ROTATE_THRESHOLD)
+                                       we_rotate = 0;
+                       }
+
+                       /* if we walk */
+                       if (we_walk) {
+                               /* get stick amplitude (dist) and direction (dir) */
+                               if (tilt > 1.0)
+                                       tilt = 1.0;
+                               tilt = (tilt - STICK_WALK_THRESHOLD) / (1.0 - STICK_WALK_THRESHOLD) * 40.0;
+                               dir = atan2(stick_right_x, stick_right_y);
+#if 0
+                               /* use hand direction to get actual stick direction */
+                               dir = fmod(dir - hand_right_yaw, M_PI * 2.0);
+                               if (dir < -M_PI)
+                                       dir += M_PI * 2.0;
+                               if (dir > M_PI)
+                                       dir -= M_PI * 2.0;
+#endif
+                               /* flip direction, if we walk backwards */
+                               if (dir > M_PI / 2.0 || dir < -M_PI / 2.0) {
+                                       /* go backwards */
+                                       set_joystick(-1, -1, 0, 1, -1);
+                                       joystick_set_y = 1;
+                               } else {
+                                       /* go forward */
+                                       set_joystick(-1, -1, 1, 0, -1);
+                                       joystick_set_y = 1;
+                               }
+                               mercenary_get_orientation(&roll, &pitch, &yaw);
+                               east = sin(yaw - dir + M_PI) * tilt;
+                               north = -cos(yaw - dir + M_PI) * tilt;
+                               /* calculatate the integer positions of 4 steps */
+                               move_east[0] = (int32_t)((east * 0.25) + 0.5);
+                               move_north[0] = (int32_t)((north * 0.25) + 0.5);
+                               move_east[1] = (int32_t)((east * 0.5) + 0.5);
+                               move_north[1] = (int32_t)((north * 0.5) + 0.5);
+                               move_east[2] = (int32_t)((east * 0.75) + 0.5);
+                               move_north[2] = (int32_t)((north * 0.75) + 0.5);
+                               move_east[3] = (int32_t)(east + 0.5);
+                               move_north[3] = (int32_t)(north + 0.5);
+                               /* calculate the delta between each of the 4 step */
+                               move_east[3] -= move_east[2];
+                               move_north[3] -= move_north[2];
+                               move_east[2] -= move_east[1];
+                               move_north[2] -= move_north[1];
+                               move_east[1] -= move_east[0];
+                               move_north[1] -= move_north[0];
+                               /* the game takes 4 steps to move the player */
+                               mercenary_vr_move(1, move_east, move_north, 256, 256);
+                       }
+
+                       /* snap orientation to steps of 45 degrees */
+                       if (we_rotate == 1) {
+                               mercenary_get_orientation(&roll, &pitch, &yaw);
+                               yaw = round(yaw / degrees45) * degrees45;
+                               /* if we rotate: change orientation */
+                               if (stick_right_x > 0)
+                                       yaw -= degrees45;
+                               else
+                                       yaw += degrees45;
+                               /* rotate only once per stick movement */
+                               we_rotate = 2;
+                               mercenary_set_orientation(yaw);
+                       }
+               }
+               if (joystick_set_x_last && !joystick_set_x)
+                       set_joystick(0, 0, -1, -1, -1);
+               if (joystick_set_y_last && !joystick_set_y)
+                       set_joystick(-1, -1, 0, 0, -1);
+               /* thrust */
+               /* button to toggle between stop and escape */
+               if (button_left_thumb && !button_left_thumb_last) {
+                       /* 'escape' pressed */
+                       if (thrust_last != -99)
+                               thrust = -99;
+                       else
+                               thrust = 0;
+               }
+               /* button to stop */
+               if (button_left_trigger && !button_left_trigger_last) {
+                       /* 'stop' pressed */
+                       thrust = 0;
+               }
+               /* get stick to increment or decrement thrust */
+               if (stick_left_y > STICK_THRUST_THRESHOLD)
+                       increment = (stick_left_y - STICK_THRUST_THRESHOLD) / (1.0 - STICK_THRUST_THRESHOLD);
+               else
+               if (stick_left_y < -STICK_THRUST_THRESHOLD)
+                       increment = (stick_left_y + STICK_THRUST_THRESHOLD) / (1.0 - STICK_THRUST_THRESHOLD);
+               else
+                       increment = 0;
+               current_time = ticks_sdl();
+               if (increment) {
+                       diff = current_time - last_time;
+                       inc_count += increment * diff;
+                       /* if we are in 'escape' mode, we stop thrust first */
+                       if (thrust == -99)
+                               thrust = 0;
+                       if (inc_count > 150.0 && thrust >= -10 && thrust < 10) {
+                               thrust++;
+                               inc_count = 0.0;
+                       }
+                       if (inc_count < -150.0 && thrust <= 10 && thrust > -10) {
+                               thrust--;
+                               inc_count = 0.0;
+                       }
+               } else {
+                       inc_count = 0;
+               }
+               last_time = current_time;
+               /* send thrust change as keycodes */
+               if (thrust_last != thrust) {
+                       /* if we were in escape mode, we stop us first and then apply the new code */
+                       if (thrust_last == -99) {
+                               set_amiga_key(KEYCODE_SPACE, 1);
+                               set_amiga_key(KEYCODE_SPACE, 0);
+                       }
+
+                       if (thrust >= 10) {
+                               set_amiga_key(KEYCODE_0, 1);
+                               set_amiga_key(KEYCODE_0, 0);
+                       } else
+                       if (thrust <= -10 && thrust > -99) {
+                               set_amiga_key(KEYCODE_F10, 1);
+                               set_amiga_key(KEYCODE_F10, 0);
+                       } else
+                       if (thrust <= -99) {
+                               set_amiga_key(KEYCODE_ESCAPE, 1);
+                               set_amiga_key(KEYCODE_ESCAPE, 0);
+                       } else
+                       if (thrust > 0) {
+                               set_amiga_key(KEYCODE_1 + thrust - 1, 1);
+                               set_amiga_key(KEYCODE_1 + thrust - 1, 0);
+                       } else
+                       if (thrust < 0) {
+                               set_amiga_key(KEYCODE_F1 - thrust - 1, 1);
+                               set_amiga_key(KEYCODE_F1 - thrust - 1, 0);
+                       } else {
+                               set_amiga_key(KEYCODE_SPACE, 1);
+                               set_amiga_key(KEYCODE_SPACE, 0);
+                       }
+               }
+       }
+       button_a_last = button_a;
+       button_b_last = button_b;
+       button_x_last = button_x;
+       button_y_last = button_y;
+       button_menu_last = button_menu;
+       button_left_trigger_last = button_left_trigger;
+       button_right_trigger_last = button_right_trigger;
+       button_left_thumb_last = button_left_thumb;
+       button_right_thumb_last = button_right_thumb;
+       stick_left_x_last = stick_left_x;
+       stick_left_y_last = stick_left_y;
+       stick_right_x_last = stick_right_x;
+       stick_right_y_last = stick_right_y;
+       thrust_last = thrust;
+       joystick_set_x_last = joystick_set_x;
+       joystick_set_y_last = joystick_set_y;
+
+       /* we must handle keyboard after toggeling keyboard_on,
+        * so that keyboard_on will not change until keyboard is rendered */
+       vr_key = 0;
+       keyboard_on = handle_vr_keyboard(hand_right_x, hand_right_y, hand_right_z, hand_right_yaw, hand_right_pitch, &vr_key);
+}
+#endif
+
 static void skip_intro(void)
 {
        int event;
@@ -292,6 +729,14 @@ static void skip_intro(void)
 
 static void special_event(int event)
 {
+#ifdef HAVE_OVR
+       /* handle VR events */
+       if (event == STOP_AT_PATCH_VR) {
+               mercenary_patch_vr();
+               return;
+       }
+#endif
+       /* handle events to improve rendering */
        if (render_improved)
                render_capture_event(event);
 }
@@ -300,7 +745,6 @@ static void main_loop(void)
 {
        double frame_step, frame_time = 0.0, frame_render = 1;
        int had_first_irq = 0;
-       int render_improved_rc;
        static uint32_t current_time, last_time = 0, diff;
        int i, rc;
        int space, length;
@@ -308,11 +752,25 @@ static void main_loop(void)
        double render_delay = 0.0;
        uint32_t palette_address;
        uint16_t palette[16];
+       int all_white = 0;
+#ifdef HAVE_OVR
+       int eye;
+       int vr = 1;
+#else
+       int vr = 0;
+#endif
 
        last_time = ticks_sdl();
 
        /* render result on window */
        while (!quit) {
+#ifdef HAVE_OVR
+               /* quit by OVR server */
+               if (should_quit_ovr())
+                       break;
+               /* get vr poses */
+               handle_vr_poses();
+#endif
                /* if we are in interstellar fligt, we use 50 Hz */
                /* if we are approaching to Eris Space Port, we use 10 Hz */
                /* else we use whatever frame rate the user wants */
@@ -329,9 +787,6 @@ static void main_loop(void)
                if (rc)
                        break;
 
-               /* clear screen */
-               opengl_clear();
-
                /* initialize rendering */
                debug_opengl = config_debug_opengl;
                benson_size = config_benson_size;
@@ -341,8 +796,6 @@ static void main_loop(void)
                        /* be sure to clean all capture history, so we don't get glichtes when turning on improved rendering again */
                        render_capture_reset();
                }
-               if (render_improved)
-                       opengl_viewport_improved(debug_opengl, (double_pixel_size) ? BENSON_AT_LINE * 2 : BENSON_AT_LINE, config_fov, benson_size);
                /* STEP 1: let the CPU render/process the game, also improve rendering via OpenGL, if enabled */
                /* amgia speed: don't render if we still delay */
                /* non amiga speed: render if we need a new frame */
@@ -356,7 +809,7 @@ static void main_loop(void)
                        frame_render = 0;
                        /* start capturing for improved graphics */
                        if (render_improved)
-                               render_capture_start(config_fov, config_improve_extend_roads, config_debug_transparent);
+                               render_capture_start(config_fov, config_improve_extend_roads, config_improve_smooth_planets, config_improve_stars_rotation, config_improve_fix_sky_rotation, config_improve_round_planets, config_debug_transparent);
 
                        /* execute until the rendered image is ready (wait for VBL) */
                        cycle_count = 0;
@@ -377,12 +830,97 @@ static void main_loop(void)
                        /* for amiga speed: set delay by the number of cycles */
                        if (config_amiga_speed)
                                render_delay += (double)cycle_count / CPU_SPEED;
+                       /* reset joystick after rendering */
+                       reset_joystick();
                }
-               /* render improved graphics, interpolate, if required */
-               if (render_improved)
-                       render_improved_rc = render_all_items((config_amiga_speed) ? 1.0 : frame_time);
-               else
-                       render_improved_rc = -1;
+
+               /* STEP 2: transfer legacy image (or just benson) in memory to OpenGL texture */
+#ifdef HAVE_OVR
+               begin_render_ovr();
+
+               for (eye = 0; eye < 2; eye++) {
+                       double camera_x, camera_y, camera_z;
+                       /* begin of rendering eye, viewport and frustum is set here */
+                       begin_render_ovr_eye(eye, &camera_x, &camera_y, &camera_z);
+#else
+               {
+#endif
+                       /* clear screen */
+                       opengl_clear(vr);
+                       /* render benson + osd ontop of improved opengl rendering, if enabled */
+                       if (render_improved) {
+#ifndef HAVE_OVR
+                               /* viewport and frustum is set here */
+                               opengl_viewport(window_width, window_height, (debug_opengl) ? 2 : 0, (double_pixel_size) ? BENSON_AT_LINE * 2 : BENSON_AT_LINE, config_fov, benson_size);
+#endif
+                               /* render improved graphics, interpolate, if required,
+                                * if no item list is available, for legacy rendering
+                                */
+                               if (all_white)
+                                       rc = render_all_white(vr);
+                               else
+                                       rc = render_all_items((config_amiga_speed) ? 1.0 : frame_time, vr);
+                               if (rc)
+                                       goto goto_legacy;
+                               opengl_blit_image(image, config_video_filter, (double_pixel_size) ? BENSON_AT_LINE * 2 : BENSON_AT_LINE, 1, config_fov, config_monitor_distance, benson_size, vr);
+                               if (help_view)
+                                       opengl_blit_osd(0, help_osd[help_view - 1], config_video_filter, (double_pixel_size) ? BENSON_AT_LINE * 2 : BENSON_AT_LINE, (vr) ? FOV_NOVAGEN : config_fov, config_monitor_distance, (vr) ? 1.0 : benson_size, 1.0, 1.0, 0.0, 0.0);
+                               if (osd_timer) {
+                                       opengl_blit_osd(1, info_osd, config_video_filter, (double_pixel_size) ? BENSON_AT_LINE * 2 : BENSON_AT_LINE, (vr) ? FOV_NOVAGEN : config_fov, config_monitor_distance, (vr) ? 1.0 : benson_size, 0.5, 0.04, 0.5, -0.95);
+                                       if (osd_timer - (int32_t)ticks_sdl() < 0)
+                                               osd_timer = 0;
+                               }
+#ifndef HAVE_OVR
+                               /* draw border around legacy render area */
+                               if (border_timer) {
+                                       opengl_render_color(1.0, 0.0, 0.0, 1.0);
+                                       opengl_render_line(160, -68, 256, 160, 68, 256, 0.0);
+                                       opengl_render_line(-160, -68, 256, -160, 68, 256, 0.0);
+                                       opengl_render_line(-160, 68, 256, 160, 68, 256, 0.0);
+                                       opengl_render_line(-160, -68, 256, 160, -68, 256, 0.0);
+                                       if (border_timer - (int32_t)ticks_sdl() < 0)
+                                               border_timer = 0;
+                               }
+#endif
+                       }
+                       /* setup viewport for legacy image and render image, if enabled */
+                       /* also render legacy, if render_improved failed due to not (yet) available items */
+                       if (render_legacy) {
+                               goto_legacy:
+                               /* render game view without benson
+                                * because benson is not updated before VBL IRQ, we don't want old image from double buffer
+                                */
+                               if (had_first_irq)
+                                       emul_video(image, memory, palette, IMAGE_WIDTH, IMAGE_HEIGHT, IMAGE_DIWSTART, chipreg, 0, BENSON_AT_LINE, double_pixel_size);
+#ifndef HAVE_OVR
+                               /* viewport and frustum is set here */
+                               opengl_viewport(window_width, window_height, (debug_opengl) ? 1 : 0, (double_pixel_size) ? BENSON_AT_LINE * 2 : BENSON_AT_LINE, FOV_NOVAGEN, 1.0);
+#endif
+                               opengl_blit_image(image, config_video_filter, (double_pixel_size) ? BENSON_AT_LINE * 2 : BENSON_AT_LINE, 0, FOV_NOVAGEN, config_monitor_distance, 1.0, 0);
+                               if (help_view)
+                                       opengl_blit_osd(0, help_osd[help_view - 1], config_video_filter, (double_pixel_size) ? BENSON_AT_LINE * 2 : BENSON_AT_LINE, FOV_NOVAGEN, config_monitor_distance, 1.0, 1.0, 1.0, 0.0, 0.0);
+                               if (osd_timer) {
+                                       opengl_blit_osd(1, info_osd, config_video_filter, (double_pixel_size) ? BENSON_AT_LINE * 2 : BENSON_AT_LINE, FOV_NOVAGEN, config_monitor_distance, 1.0, 0.5, 0.04, 0.5, -0.95);
+                                       if (osd_timer - (int32_t)ticks_sdl() < 0)
+                                               osd_timer = 0;
+                               }
+                       }
+#ifdef HAVE_OVR
+                       /* render keyboard */
+                       if (keyboard_on)
+                               render_vr_keyboard(camera_x, camera_y);
+
+                       /* end of rendering eye */
+                       end_render_ovr_eye(eye);
+               }
+               /* at this point we are ready with our image, so we display */
+               end_render_ovr();
+               render_mirror_ovr(window_width, window_height);
+#else
+               }
+#endif
+               swap_sdl();
+
                /* advance frame time, if we are not in help view  */
                if (!(had_first_irq && help_view)) {
                        frame_time += frame_step;
@@ -392,41 +930,6 @@ static void main_loop(void)
                        }
                }
 
-               /* STEP 2: transfer legacy image (or just benson) in memory to OpenGL texture */
-               if (had_first_irq) {
-                       /* render game view without benson
-                        * because benson is not updated before VBL IRQ, we don't want old image from double buffer
-                        */
-                       if (render_legacy || render_improved_rc)
-                               emul_video(image, memory, palette, IMAGE_WIDTH, IMAGE_HEIGHT, IMAGE_DIWSTART, chipreg, 0, BENSON_AT_LINE, double_pixel_size);
-               }
-               /* render benson + osd ontop of improved opengl rendering, if enabled */
-               if (render_improved && render_improved_rc == 0) {
-                       opengl_blit_benson(image, config_video_filter, (double_pixel_size) ? BENSON_AT_LINE * 2 : BENSON_AT_LINE, config_fov, benson_size, (double_pixel_size) ? 2 : 1);
-                       if (help_view)
-                               opengl_blit_osd(0, help_osd, config_video_filter, (double_pixel_size) ? BENSON_AT_LINE * 2 : BENSON_AT_LINE, config_fov, benson_size, 1.0, 1.0, 0.0, 0.0);
-                       if (osd_timer) {
-                               opengl_blit_osd(1, info_osd, config_video_filter, (double_pixel_size) ? BENSON_AT_LINE * 2 : BENSON_AT_LINE, config_fov, benson_size, 0.5, 0.04, 0.5, -0.95);
-                               if (osd_timer - (int32_t)ticks_sdl() < 0)
-                                       osd_timer = 0;
-                       }
-               }
-               /* setup viewport for legacy image and render image, if enabled */
-               /* also render legacy, if render_improved failed due to not (yet) available items */
-               if (render_legacy || (render_improved && render_improved_rc)) {
-                       opengl_viewport_legacy(debug_opengl);
-                       opengl_blit_legacy(image, config_video_filter);
-                       if (help_view)
-                               opengl_blit_osd(0, help_osd, config_video_filter, 0, 0.0, 0, 1.0, 1.0, 0.0, 0.0);
-                       if (osd_timer) {
-                               opengl_blit_osd(1, info_osd, config_video_filter, 0, 0.0, 0, 0.5, 0.04, 0.5, -0.95);
-                               if (osd_timer - (int32_t)ticks_sdl() < 0)
-                                       osd_timer = 0;
-                       }
-               }
-
-               /* at this point we are ready with our image, so we display */
-               swap_sdl();
                /* measure frame rate */
                framerate_measure();
 
@@ -448,7 +951,7 @@ static void main_loop(void)
                                /* transfer benson without game view
                                 * because we only got benson refreshed during VBL IRQ
                                 */
-                               emul_video(image, memory, palette, IMAGE_WIDTH, IMAGE_HEIGHT, IMAGE_DIWSTART, chipreg, BENSON_AT_LINE, IMAGE_HEIGHT, double_pixel_size);
+                               all_white = emul_video(image, memory, palette, IMAGE_WIDTH, IMAGE_HEIGHT, IMAGE_DIWSTART, chipreg, BENSON_AT_LINE, IMAGE_HEIGHT, double_pixel_size);
                                /* render sound to sound buffer
                                 * buffer pointer read and write is atomic, so no locking required!
                                 */
@@ -532,27 +1035,44 @@ static void disk_read(int track, int __attribute__((unused)) side, uint32_t data
        if (!(track & 1)) {
                char filename[256];
                int gamesave_num = (track - 2) >> 1;
-               int got;
-               FILE *fp;
 
                memset(game_save, 0, sizeof(game_save)); /* clear so make the game fail, if we fail */
+
+               if (mission_disk == 0) {
+                       int got;
+                       FILE *fp;
+
 #if defined(_WIN32)
-               filename[0] = '\0';
+                       filename[0] = '\0';
 #else
-               sprintf(filename, "%s/%s/", home_dir, config_gamesave_dir);
-               mkdir(filename, 0777);
+                       sprintf(filename, "%s/%s/", home_dir, config_gamesave_dir);
+                       mkdir(filename, 0777);
 #endif
-               sprintf(filename + strlen(filename), "%d%s", gamesave_num, mercenary_gamesavesuffix);
-               fp = fopen(filename, "r");
-               if (!fp) {
+                       sprintf(filename + strlen(filename), "%d%s", gamesave_num, mercenary_gamesavesuffix);
+                       fp = fopen(filename, "r");
+                       if (!fp) {
 fail:
-                       print_error("failed to load game from '%s'\n", filename);
-                       goto copy;
+                               print_info("failed to load game from '%s'\n", filename);
+                               osd_info("load game", "FAILED!");
+                               goto copy;
+                       }
+                       got = fread(game_save, sizeof(game_save[0]), 2, fp);
+                       fclose(fp);
+                       if (got != 2)
+                               goto fail;
+                       sprintf(filename, "#%d", gamesave_num);
+                       osd_info("loaded game", filename);
+               } else {
+                       const uint8_t *mission_data = get_mission_disk(mission_disk, gamesave_num);
+                       sprintf(filename, "disk %d #%d", mission_disk, gamesave_num);
+                       if (!mission_data) {
+                               print_info("failed to load mission %s\n", filename);
+                               osd_info("load mission", "FAILED!");
+                               goto copy;
+                       }
+                       memcpy(game_save, mission_data, 0x1820 << 2);
+                       osd_info("loaded mission", filename);
                }
-               got = fread(game_save, sizeof(game_save[0]), 2, fp);
-               fclose(fp);
-               if (got != 2)
-                       goto fail;
        }
 
 copy:
@@ -563,6 +1083,12 @@ copy:
 /* game writes track with saved game */
 static void disk_write(int track, int __attribute__((unused)) side, uint32_t data, uint16_t length)
 {
+       /* cannot save on mission disk */
+       if (mission_disk) {
+               osd_info("", "not applicable");
+               return;
+       }
+
        /* skip sync info that is provided by game and only relevant for a real disk track */
        data += 0x200;
        length -= 0x200;
@@ -602,9 +1128,12 @@ static void disk_write(int track, int __attribute__((unused)) side, uint32_t dat
                if (!fp) {
 fail:
                        print_error("failed to save game to '%s'\n", filename);
+                       osd_info("save game", "FAILED!");
                        return;
                }
                print_info("Game state saved to '%s'\n", filename);
+               sprintf(filename, "#%d", gamesave_num);
+               osd_info("saved game", filename);
                wrote = fwrite(game_save, sizeof(game_save[0]), 2, fp);
                fclose(fp);
                if (wrote != 2)
@@ -612,24 +1141,7 @@ fail:
        }
 }
 
-static void osd_info(const char *param, const char *value)
-{
-       char line[41] = "                                        ";
-
-       if (param[0]) {
-               strncpy(line + 21 - strlen(param), param, strlen(param));
-               line[22] = ':';
-       }
-       if (strlen(value) > 15) {
-               print_error("string too long\n");
-               return;
-       }
-       strncpy(line + 25, value, strlen(value));
-       text_render(info_osd, OSD_WIDTH, OSD_HEIGHT, line, 0x00, 4, 0, 0, 1);
-       osd_timer = ticks_sdl() + 2500;
-}
-
-static int shift = 0, ctrl = 0;
+static int shift = 0, ctrl = 0, alt = 0;
 
 static void keyboard_sdl(int down, enum keycode keycode)
 {
@@ -644,7 +1156,7 @@ static void keyboard_sdl(int down, enum keycode keycode)
        if (ctrl && down) {
                switch (keycode) {
                case KEYCODE_h:
-                       help_view ^= 1;
+                       toggle_help();
                        break;
                case KEYCODE_v:
                        config_video_filter ^= 1;
@@ -663,7 +1175,7 @@ static void keyboard_sdl(int down, enum keycode keycode)
                        osd_info("render mode", (config_render) ? "OpenGL" : "original");
                        break;
                case KEYCODE_b:
-                       if (!config_render) {
+                       if (!config_render && !config_debug_opengl) {
                                osd_info("", "not applicable");
                                break;
                        }
@@ -675,6 +1187,7 @@ static void keyboard_sdl(int down, enum keycode keycode)
                                config_fov = FOV_JOLLY;
                        }
                        osd_info("Benson size", (config_benson_size == 0.5) ? "half" : "normal");
+                       border_timer = ticks_sdl() + 1500;
                        break;
                case KEYCODE_i:
                        if (!intro_skipped)
@@ -682,163 +1195,183 @@ static void keyboard_sdl(int down, enum keycode keycode)
                        else
                                osd_info("", "not applicable");
                        break;
+               case KEYCODE_1:
+                       if (get_mission_disk(1, 1)) { /* just to check support */
+                               mission_disk = 1;
+                               osd_info("mission disk", "insert 1");
+                       } else
+                               osd_info("", "not applicable");
+                       break;
+               case KEYCODE_2:
+                       if (get_mission_disk(2, 1)) { /* just to check support */
+                               mission_disk = 2;
+                               osd_info("mission disk", "insert 2");
+                       } else
+                               osd_info("", "not applicable");
+                       break;
+               case KEYCODE_0:
+                       if (get_mission_disk(1, 1)) { /* just to check support */
+                               mission_disk = 0;
+                               osd_info("mission disk", "removed");
+                       } else
+                               osd_info("", "not applicable");
+                       break;
                case KEYCODE_c:
                        if (config_ctrl_c)
                                quit = 1;
                        break;
+               case KEYCODE_o:
+#ifdef HAVE_OVR
+                       reset_observer_ovr();
+                       osd_info("", "reset observer");
+#else
+                       osd_info("", "not applicable");
+#endif
+                       break;
                case KEYCODE_KP_PLUS:
+#ifdef HAVE_OVR
+                       osd_info("", "not applicable");
+#else
                        if (config_fov / 1.2 >= FOV_MIN)
                                config_fov /= 1.2;
                        disp_fov:
                        {
                                char text[16];
-                               sprintf(text, "%.2f", config_fov);
+                               if (config_fov < 63.5 || config_fov > 64.5)
+                                       sprintf(text, "%.2f", config_fov);
+                               else
+                                       sprintf(text, "%.2f (default)", config_fov);
                                osd_info("FOV", text);
+                               border_timer = ticks_sdl() + 1500;
                        }
+#endif
                        break;
                case KEYCODE_KP_MINUS:
+#ifdef HAVE_OVR
+                       osd_info("", "not applicable");
+#else
                        if (config_fov * 1.2 <= FOV_MAX)
                                config_fov *= 1.2;
                        goto disp_fov;
+#endif
+                       break;
                default: break;
                }
                /* do not pass keys to game while holding CTRL */
                return;
        }
 
-       if (keycode == KEYCODE_PAUSE && down)
-               help_view ^= 1;
+       if (help_view == 1 && down) {
+               help_view = 2;
+               return;
+       }
+
+       if (keycode == KEYCODE_PAUSE && down) {
+               toggle_help();
+               return;
+       }
 
-       /* in help view we don't need to forward keypresses */
+       /* in help view we must not forward keypresses */
        if (help_view)
                return;
 
        switch (keycode) {
        case KEYCODE_LSHIFT:
-               set_key("LSH", down);
+               set_amiga_key(keycode, down);
                shift = down;
                break;
        case KEYCODE_RSHIFT:
-               set_key("RSH", down);
+               set_amiga_key(keycode, down);
                shift = down;
                break;
+       case KEYCODE_LALT:
+               set_amiga_key(keycode, down);
+               alt = down;
+               break;
+       case KEYCODE_RALT:
+               set_amiga_key(keycode, down);
+               alt = down;
+               break;
        case KEYCODE_LEFT:
                if (shift && down) {
-                       set_key("LF", down);
+                       set_amiga_key(keycode, down);
                        set_joystick(-1, -1, -1, -1, -1);
                        break;
                }
-               set_key("LF", 0);
+               set_amiga_key(keycode, 0);
                set_joystick(down, -1, -1, -1, -1);
                break;
        case KEYCODE_RIGHT:
                if (shift && down) {
-                       set_key("RT", down);
+                       set_amiga_key(keycode, down);
                        set_joystick(-1, -1, -1, -1, -1);
                        break;
                }
-               set_key("RT", 0);
+               set_amiga_key(keycode, 0);
                set_joystick(-1, down, -1, -1, -1);
                break;
        case KEYCODE_UP:
                if (shift && down) {
-                       set_key("UP", down);
+                       set_amiga_key(keycode, down);
                        set_joystick(-1, -1, -1, -1, -1);
                        break;
                }
-               set_key("UP", 0);
-               set_joystick(-1, -1, down, -1, -1);
+               set_amiga_key(keycode, 0);
+               if (!alt || down)
+                       set_joystick(-1, -1, down, 0, -1);
                break;
        case KEYCODE_DOWN:
                if (shift && down) {
-                       set_key("DN", down);
+                       set_amiga_key(keycode, down);
                        set_joystick(-1, -1, -1, -1, -1);
                        break;
                }
-               set_key("DN", 0);
-               set_joystick(-1, -1, -1, down, -1);
+               set_amiga_key(keycode, 0);
+               if (!alt || down)
+                       set_joystick(-1, -1, 0, down, -1);
                break;
        case KEYCODE_END:
                set_joystick(-1, -1, -1, -1, down);
                break;
+       case KEYCODE_INSERT:
+               set_amiga_key(KEYCODE_HELP, down);
+               break;
+       default:
+               /* reset vr thrust */
+#ifdef HAVE_OVR
+               thrust_last = 0;
+#endif
+               set_amiga_key(keycode, down);
+       }
+}
 
-       case KEYCODE_a: set_key("A", down); break;
-       case KEYCODE_b: set_key("B", down); break;
-       case KEYCODE_c: set_key("C", down); break;
-       case KEYCODE_d: set_key("D", down); break;
-       case KEYCODE_e: set_key("E", down); break;
-       case KEYCODE_f: set_key("F", down); break;
-       case KEYCODE_g: set_key("G", down); break;
-       case KEYCODE_h: set_key("H", down); break;
-       case KEYCODE_i: set_key("I", down); break;
-       case KEYCODE_j: set_key("J", down); break;
-       case KEYCODE_k: set_key("K", down); break;
-       case KEYCODE_l: set_key("L", down); break;
-       case KEYCODE_m: set_key("M", down); break;
-       case KEYCODE_n: set_key("N", down); break;
-       case KEYCODE_o: set_key("O", down); break;
-       case KEYCODE_p: set_key("P", down); break;
-       case KEYCODE_q: set_key("Q", down); break;
-       case KEYCODE_r: set_key("R", down); break;
-       case KEYCODE_s: set_key("S", down); break;
-       case KEYCODE_t: set_key("T", down); break;
-       case KEYCODE_u: set_key("U", down); break;
-       case KEYCODE_v: set_key("V", down); break;
-       case KEYCODE_w: set_key("W", down); break;
-       case KEYCODE_x: set_key("X", down); break;
-       case KEYCODE_y: set_key("Y", down); break;
-       case KEYCODE_z: set_key("Z", down); break;
-
-       case KEYCODE_0: set_key("0", down); break;
-       case KEYCODE_1: set_key("1", down); break;
-       case KEYCODE_2: set_key("2", down); break;
-       case KEYCODE_3: set_key("3", down); break;
-       case KEYCODE_4: set_key("4", down); break;
-       case KEYCODE_5: set_key("5", down); break;
-       case KEYCODE_6: set_key("6", down); break;
-       case KEYCODE_7: set_key("7", down); break;
-       case KEYCODE_8: set_key("8", down); break;
-       case KEYCODE_9: set_key("9", down); break;
-
-       case KEYCODE_KP_0: set_key("NP0", down); break;
-       case KEYCODE_KP_1: set_key("NP1", down); break;
-       case KEYCODE_KP_2: set_key("NP2", down); break;
-       case KEYCODE_KP_3: set_key("NP3", down); break;
-       case KEYCODE_KP_4: set_key("NP4", down); break;
-       case KEYCODE_KP_5: set_key("NP5", down); break;
-       case KEYCODE_KP_6: set_key("NP6", down); break;
-       case KEYCODE_KP_7: set_key("NP7", down); break;
-       case KEYCODE_KP_8: set_key("NP8", down); break;
-       case KEYCODE_KP_9: set_key("NP9", down); break;
-       case KEYCODE_KP_DIVIDE: set_key("NPDIV", down); break;
-       case KEYCODE_KP_MULTIPLY: set_key("NPMUL", down); break;
-       case KEYCODE_KP_MINUS: set_key("NPSUB", down); break;
-       case KEYCODE_KP_PLUS: set_key("NPADD", down); break;
-       case KEYCODE_KP_PERIOD: set_key("NPDEL", down); break;
-       // NPLPAREN and NPRPAREN are not emulated
-
-       case KEYCODE_F1: set_key("F1", down); break;
-       case KEYCODE_F2: set_key("F2", down); break;
-       case KEYCODE_F3: set_key("F3", down); break;
-       case KEYCODE_F4: set_key("F4", down); break;
-       case KEYCODE_F5: set_key("F5", down); break;
-       case KEYCODE_F6: set_key("F6", down); break;
-       case KEYCODE_F7: set_key("F7", down); break;
-       case KEYCODE_F8: set_key("F8", down); break;
-       case KEYCODE_F9: set_key("F9", down); break;
-       case KEYCODE_F10: set_key("F10", down); break;
-
-       case KEYCODE_SPACE: set_key("SPC", down); break;
-       case KEYCODE_BACKSPACE: set_key("BS", down); break;
-       case KEYCODE_TAB: set_key("TAB", down); break;
-       case KEYCODE_KP_ENTER: set_key("ENT", down); break;
-       case KEYCODE_RETURN: set_key("RET", down); break;
-       case KEYCODE_ESCAPE: set_key("ESC", down); break;
-       case KEYCODE_DELETE: set_key("DEL", down); break;
-       case KEYCODE_INSERT: set_key("HELP", down); break;
+static double joystick_last_x = 0, joystick_last_y = 0;
+static int joystick_last_fire = 0;
 
-       default: break;
-       }
+static void joystick_sdl(double x, double y, int fire)
+{
+       int left = -1, right = -1, up = -1, down = -1;
+
+       if (x <= -0.5 && joystick_last_x > -0.5)
+               left = 1;
+       if (x > -0.5 && joystick_last_x <= -0.5)
+               left = 0;
+       if (x >= 0.5 && joystick_last_x < 0.5)
+               right = 1;
+       if (x < 0.5 && joystick_last_x >= 0.5)
+               right = 0;
+       if (y <= -0.5 && joystick_last_y > -0.5)
+               up = 1;
+       if (y > -0.5 && joystick_last_y <= -0.5)
+               up = 0;
+       if (y >= 0.5 && joystick_last_y < 0.5)
+               down = 1;
+       if (y < 0.5 && joystick_last_y >= 0.5)
+               down = 0;
+       set_joystick(left, right, up, down, fire);
+       joystick_last_x = x;
+       joystick_last_y = y;
+       joystick_last_fire = fire;
 }
 
 void audio_sdl(float *data, int length)
@@ -866,12 +1399,16 @@ void audio_sdl(float *data, int length)
        sound_buffer_readp =(sound_buffer_readp + length) % sound_buffer_size;
 }
 
+/* used for geier counter */
 void sound_irq(void)
 {
        /* trigger and execute IRQ 4 = sound */
        execute_cpu(4, NULL);
 }
 
+extern uint8_t mercenary_splash_palette[][3];
+extern char mercenary_splash_pixels[];
+
 int main(int argc, char *argv[])
 {
        int rc;
@@ -947,26 +1484,51 @@ int main(int argc, char *argv[])
        mercenary_patch();
 
        /* init SDL and OpenGL */
-       rc = init_sdl(argv[0], (config_debug_opengl) ? SCREEN_WIDTH * 2 : SCREEN_WIDTH * 3, (config_debug_opengl) ? SCREEN_HEIGHT * 4 : SCREEN_HEIGHT * 3, SOUND_SAMPLERATE, sdl_sound_chunk, keyboard_sdl, audio_sdl, config_multisampling);
+#ifdef HAVE_OVR
+       int vbl_sync = 0;
+       int vr = 1;
+       int multisampling = 0;
+       window_width = SCREEN_WIDTH;
+       window_height = SCREEN_HEIGHT;
+#else
+       int vbl_sync = 1;
+       int vr = 0;
+       int multisampling = config_multisampling;
+       window_width = (config_debug_opengl) ? SCREEN_WIDTH / 3 * 2 : SCREEN_WIDTH;
+       window_height = (config_debug_opengl) ? SCREEN_HEIGHT / 3 * 4 : SCREEN_HEIGHT;
+#endif
+       rc = init_sdl(mercenary_name, window_width, window_height, SOUND_SAMPLERATE, sdl_sound_chunk, keyboard_sdl, config_joystick, config_joystick_x, config_joystick_y, config_joystick_fire, joystick_sdl, audio_sdl, resize_window, multisampling, vbl_sync, vr);
+       if (rc < 0)
+               goto done;
+#ifdef HAVE_OVR
+       rc = init_ovr(config_multisampling);
+       if (rc < 0)
+               goto done;
+       rc = init_vr_keyboard(config_keyboard_height, config_keyboard_distance);
        if (rc < 0)
                goto done;
-       rc = init_opengl((double_pixel_size) ? IMAGE_WIDTH * 2 : IMAGE_WIDTH, (double_pixel_size) ? IMAGE_HEIGHT * 2 : IMAGE_HEIGHT);
+#endif
+       rc = init_opengl_image((double_pixel_size) ? IMAGE_WIDTH * 2 : IMAGE_WIDTH, (double_pixel_size) ? IMAGE_HEIGHT * 2 : IMAGE_HEIGHT);
        if (rc < 0)
                goto done;
-       resize_opengl((config_debug_opengl) ? SCREEN_WIDTH * 2 : SCREEN_WIDTH * 3, (config_debug_opengl) ? SCREEN_HEIGHT * 4 : SCREEN_HEIGHT * 3);
 
        /* init osd */
-       rc = init_osd(0, IMAGE_WIDTH * 2, IMAGE_HEIGHT * 2);
+       rc = init_opengl_osd(0, IMAGE_WIDTH * 2, IMAGE_HEIGHT * 2);
        if (rc < 0)
                goto done;
-       rc = init_osd(1, OSD_WIDTH, OSD_HEIGHT);
+       rc = init_opengl_osd(1, OSD_WIDTH, OSD_HEIGHT);
        if (rc < 0)
                goto done;
-       help_osd = text_alloc(IMAGE_WIDTH * 2, IMAGE_HEIGHT * 2, HELP_ALPHA);
-       if (!help_osd)
+       help_osd[0] = text_alloc(IMAGE_WIDTH * 2, IMAGE_HEIGHT * 2, 0x00);
+       if (!help_osd[0])
                goto done;
-       text_render(help_osd, IMAGE_WIDTH * 2, IMAGE_HEIGHT * 2, mercenary_name, HELP_ALPHA, 3, (double)(80 - strlen(mercenary_name)) / 2.0, 1, 1);
-       text_render(help_osd, IMAGE_WIDTH * 2, IMAGE_HEIGHT * 2,
+       text_insert_image(help_osd[0], mercenary_splash_palette, mercenary_splash_pixels, 0xff);
+       help_views++;
+       help_osd[1] = text_alloc(IMAGE_WIDTH * 2, IMAGE_HEIGHT * 2, HELP_ALPHA);
+       if (!help_osd[1])
+               goto done;
+       text_render(help_osd[1], IMAGE_WIDTH * 2, IMAGE_HEIGHT * 2, mercenary_name, HELP_ALPHA, 3, (double)(80 - strlen(mercenary_name)) / 2.0, 1, 1);
+       text_render(help_osd[1], IMAGE_WIDTH * 2, IMAGE_HEIGHT * 2,
                "Emulation:\n"
                "        Press `PAUSE' to toggle this help screen on or off.\n"
                "        Press `CTRL' + `F' to toggle between full screen / window mode.\n"
@@ -977,6 +1539,10 @@ int main(int argc, char *argv[])
                "        Press `CTRL' + `A' to toggle audio filter on / off.\n"
                "        Press `CTRL' + `+' or `-' to change field-of-view (OpenGL).\n"
                "        Press `CTRL' + `I' to skip intro (approaching to Eris).\n"
+               "        Press `CTRL' + `1' or `2' to insert or `0' to remove mission disk.\n"
+#ifdef HAVE_OVR
+               "        Press `CTRL' + `O' to reset observer position.\n"
+#endif
                "\n"
                "Answer to a Question:\n"
                "        Press `O' (not Zero) for OK and other key for NO.\n"
@@ -1008,6 +1574,34 @@ int main(int argc, char *argv[])
                "        Press `INSERT' to loading and saving options.\n"
                "        Press `ENTER' to pause game, other key to continue.\n"
                ,HELP_ALPHA, 1, 2, 5, 0);
+               help_views++;
+#ifdef HAVE_OVR
+       help_osd[2] = text_alloc(IMAGE_WIDTH * 2, IMAGE_HEIGHT * 2, HELP_ALPHA);
+       if (!help_osd[2])
+               goto done;
+       text_render(help_osd[2], IMAGE_WIDTH * 2, IMAGE_HEIGHT * 2, mercenary_name, HELP_ALPHA, 3, (double)(80 - strlen(mercenary_name)) / 2.0, 1, 1);
+       text_render(help_osd[2], IMAGE_WIDTH * 2, IMAGE_HEIGHT * 2,
+               "Emulation using Controller:\n"
+               "        Press `A' or 'X' button to toggle this help screen on or off.\n"
+               "        Press 'B' or 'Y' button to reset observer position. (importaint!)\n"
+               "        To have a virtual keyboard, point right hand below control pannel.\n"
+               "        Point to a key on keyboard. The key will highlight.\n"
+               "        Pull `Trigger' on right controller to enter the highlighted key.\n"
+               "\n"
+               "Walking / Driving / Flying using Controller:\n"
+               "        Use thumb stick on right controller, to move player / craft.\n"
+               "        Move thumb stick forth and back to walk, left and right to rotate.\n"
+               "        Pull `Trigger' on right controller to change orientation.\n"
+               "        Press `X' button to board, `Y' button to leave.\n"
+               "        Move thumb stick on left controller to drive/fly forward or backward.\n"
+               "        Pull `Trigger' on left controller stop craft.\n"
+               "        Press thumb stick on left controller for escape sequence and stop it.\n"
+               "        Pull `Trigger' on right controller to fire.\n"
+               "\n"
+               "For all other game function, use the virtual or real keyboard!\n"
+               ,HELP_ALPHA, 1, 2, 5, 0);
+               help_views++;
+#endif
        info_osd = text_alloc(OSD_WIDTH, OSD_HEIGHT, 0x00);
        if (!info_osd)
                goto done;
@@ -1026,6 +1620,9 @@ int main(int argc, char *argv[])
 
 done:
        exit_opengl();
+#ifdef HAVE_OVR
+       exit_ovr();
+#endif
        exit_sdl();
 
        if (chipreg)
@@ -1038,8 +1635,11 @@ done:
                free(sound_buffer);
        if (image)
                free(image);
-       if (help_osd)
-               free(help_osd);
+       while (help_views) {
+               help_views--;
+               if (help_osd[help_views])
+                       free(help_osd[help_views]);
+       }
        if (info_osd)
                free(info_osd);