/* vec3 rotate self by axis and angle */ union vec3* vec3_rot_axis_self(union vec3 *vo, float x, float y, float z, float angle) { union quat rotate; quat_init_axis(&rotate, x, y, z, angle); quat_rot_vec_self(vo, &rotate); return vo; }
static void draw_screen() { static double last_frame_time; static int frame_index; static float frame_rates[FRAME_INDEX_MAX]; static float frame_times[FRAME_INDEX_MAX]; double start_time = time_now_double(); glClearColor(0.0, 0.0, 0.0, 0.0); graph_dev_start_frame(); sng_set_foreground(WHITE); sng_abs_xy_draw_string("F1 FOR HELP", NANO_FONT, SCREEN_WIDTH - 100, 10); static struct entity_context *cx; if (!cx) cx = entity_context_new(50, 50); if (wireframe != oldwireframe) { oldwireframe = wireframe; if (wireframe) set_renderer(cx, WIREFRAME_RENDERER | BLACK_TRIS); else set_renderer(cx, FLATSHADING_RENDERER); } float r = target_mesh->radius / tan(FOV / 3.0); /* 50% size for middle zoom */ float r_cam = r * lobby_zoom / 255.0; camera_set_parameters(cx, 0.1f, r * 2.2, SCREEN_WIDTH, SCREEN_HEIGHT, FOV); camera_set_pos(cx, r_cam, 0, 0); camera_look_at(cx, 0, 0, 0); camera_assign_up_direction(cx, 0, 1, 0); union vec3 light_pos = { { 1.01 * r, 0, 0 } }; quat_rot_vec_self(&light_pos, &light_orientation); set_lighting(cx, light_pos.v.x, light_pos.v.y, light_pos.v.z); calculate_camera_transform(cx); struct entity *e = add_entity(cx, target_mesh, 0, 0, 0, WHITE); struct entity *ae = NULL; if (planet_mode) { update_entity_material(e, &planet_material); if (draw_atmosphere) { ae = add_entity(cx, atmosphere_mesh, 0, 0, 0, WHITE); update_entity_scale(ae, 1.03); update_entity_material(ae, &atmosphere_material); } } update_entity_orientation(e, &lobby_orientation); if (isDraggingLight) { union vec3 light_dir = { { 10.75 * r_cam, 0, 0 } }; quat_rot_vec_self(&light_dir, &light_orientation); sng_set_foreground(WHITE); render_line(cx, light_dir.v.x, light_dir.v.y, light_dir.v.z, 0, 0, 0); e = add_entity(cx, light_mesh, light_dir.v.x, light_dir.v.y, light_dir.v.z, WHITE); } else { e = add_entity(cx, light_mesh, light_pos.v.x, light_pos.v.y, light_pos.v.z, WHITE); } render_entities(cx); remove_all_entity(cx); if (helpmode) draw_help_screen(0); if (display_frame_stats > 0) { float avg_frame_rate = 0; float avg_frame_time = 0; int i; for (i = 0; i < FRAME_INDEX_MAX; i++) { avg_frame_rate += frame_rates[i]; avg_frame_time += frame_times[i]; } avg_frame_rate /= (float)FRAME_INDEX_MAX; avg_frame_time /= (float)FRAME_INDEX_MAX; sng_set_foreground(WHITE); char stat_buffer[30]; sprintf(stat_buffer, "fps %5.2f", 1.0/avg_frame_rate); sng_abs_xy_draw_string(stat_buffer, NANO_FONT, 2, 10); sprintf(stat_buffer, "t %0.2f ms", avg_frame_time * 1000.0); sng_abs_xy_draw_string(stat_buffer, NANO_FONT, 92, 10); } if (display_frame_stats > 1) graph_dev_display_debug_menu_show(); graph_dev_end_frame(); glFinish(); /* * Swap the buffers. This this tells the driver to * render the next frame from the contents of the * back-buffer, and to set all rendering operations * to occur on what was the front-buffer. * * Double buffering prevents nasty visual tearing * from the application drawing on areas of the * screen that are being updated at the same time. */ SDL_GL_SwapBuffers(); if (display_frame_stats > 0) { double end_time = time_now_double(); frame_rates[frame_index] = start_time - last_frame_time; frame_times[frame_index] = end_time - start_time; frame_index = (frame_index + 1) % FRAME_INDEX_MAX; last_frame_time = start_time; } }
void quat_to_heading_mark(const union quat *q, double *heading, double *mark) { union vec3 dir = {{1,0,0}}; quat_rot_vec_self(&dir, q); vec3_to_heading_mark(&dir, 0, heading, mark); }