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Particles extension, Matrix3 & buncha fixes
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| Original file line number | Diff line number | Diff line change |
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| #if !OOGABOOGA_ENABLE_EXTENSIONS | ||
| #error particles_example.c requires OOGABOOGA_ENABLE_EXTENSIONS to be enabled | ||
| #endif | ||
| #if !OOGABOOGA_EXTENSION_PARTICLES | ||
| #error particles_example.c requires OOGABOOGA_EXTENSION_PARTICLES to be enabled | ||
| #endif | ||
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| Emission_Config emission_rain; | ||
| Emission_Config emission_poof; | ||
| void setup_emission_configs(); | ||
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| int entry(int argc, char **argv) { | ||
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| // This is how we (optionally) configure the window. | ||
| // To see all the settable window properties, ctrl+f "struct Os_Window" in os_interface.c | ||
| window.title = STR("Particles example"); | ||
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| setup_emission_configs(); | ||
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| Gfx_Font *font = load_font_from_disk(STR("C:/windows/fonts/arial.ttf"), get_heap_allocator()); | ||
| assert(font, "Failed loading arial.ttf"); | ||
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| // Keep a stack of the looped emissions so we can pop them | ||
| Emission_Handle *emission_stack = 0; | ||
| growing_array_init((void**)&emission_stack, sizeof(Emission_Handle), get_heap_allocator()); | ||
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| float64 last_time = os_get_elapsed_seconds(); | ||
| while (!window.should_close) { | ||
| reset_temporary_storage(); | ||
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| float64 now = os_get_elapsed_seconds(); | ||
| float64 delta_time = now-last_time; | ||
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| last_time = now; | ||
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| draw_frame.projection = m4_make_orthographic_projection(window.pixel_width * -0.5, window.pixel_width * 0.5, window.pixel_height * -0.5, window.pixel_height * 0.5, -1, 10); | ||
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| float mx = input_frame.mouse_x - window.width/2; | ||
| float my = input_frame.mouse_y - window.height/2; | ||
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| // Left click: Emit a rain thingy and add to stack of rain emissions | ||
| if (is_key_just_pressed(MOUSE_BUTTON_LEFT)) { | ||
| Emission_Handle h = emit_particles(emission_rain, v2(mx, my)); | ||
| growing_array_add((void**)&emission_stack, &h); | ||
| } | ||
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| u64 num_emissions = growing_array_get_valid_count(emission_stack); | ||
| // Pop emissions on right click | ||
| if (is_key_just_pressed(MOUSE_BUTTON_RIGHT) && num_emissions > 0) { | ||
| Emission_Handle h = emission_stack[num_emissions-1]; | ||
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| emission_release(h); | ||
| growing_array_pop((void**)&emission_stack); | ||
| } | ||
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| // Emit poof with spacebar, but just use one instance which is reset with a new seed | ||
| // (Most of the time you might just want to emit a new emission each time though, this | ||
| // is just showing that a resetting emission is possible) | ||
| if (is_key_just_pressed(KEY_SPACEBAR)) { | ||
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| local_persist Emission_Handle inst = ZERO(Emission_Handle); | ||
| local_persist bool inst_set = false; | ||
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| if (!inst_set) { | ||
| inst = emit_particles(emission_poof, v2(mx, my)); | ||
| inst_set = true; | ||
| } else { | ||
| emission_poof.seed = get_random(); | ||
| emission_set_config(inst, emission_poof); | ||
| emission_reset(inst); | ||
| emission_set_position(inst, v2(mx, my)); | ||
| } | ||
| } | ||
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| ext_update(delta_time); | ||
| ext_draw(); | ||
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| draw_text(font, tprint("FPS: %.2f", 1.0/delta_time), 32, v2(-window.width/2+30, window.height/2-60), v2(1, 1), COLOR_WHITE); | ||
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| os_update(); | ||
| gfx_update(); | ||
| } | ||
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| return 0; | ||
| } | ||
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| void setup_emission_configs() { | ||
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| Gfx_Image *img = load_image_from_disk(STR("oogabooga/examples/berry_bush.png"), get_heap_allocator()); | ||
| assert(img, "Failed loading berry_bush.png"); | ||
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| // | ||
| // Rain | ||
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| emission_rain.kind_pool[0] = PARTICLE_KIND_RECTANGLE; | ||
| emission_rain.kind_pool[1] = PARTICLE_KIND_CIRCLE; | ||
| emission_rain.kind_pool[2] = PARTICLE_KIND_IMAGE; | ||
| emission_rain.number_of_kinds = 3; | ||
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| emission_rain.image_pool[0] = img; | ||
| emission_rain.number_of_images = 1; | ||
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| emission_rain.loop = true; // Loop means first particle starts over after last particle is emitted | ||
| // If we want to loop without pauses, then number_of_particles needs to be at least | ||
| // life_time*emissions_per_second | ||
| emission_rain.number_of_particles = 600; | ||
| emission_rain.emissions_per_second = 100; | ||
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| emission_rain.life_time.flat_f32 = 0.6; | ||
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| // Color and size must be set for particles to be visible at all | ||
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| emission_rain.color.mode = EMISSION_PROPERTY_MODE_INTERPOLATE; | ||
| emission_rain.color.interp_kind = EMISSION_INTERPOLATION_SMOOTH; | ||
| emission_rain.color.min_v4 = v4(0.85, 0.5, 0.5, 1.0); | ||
| emission_rain.color.max_v4 = v4(0.85, 0.5, 0.5, 0.0); // Fade out | ||
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| emission_rain.size.flat_v2 = v2(16, 16); | ||
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| // start_position is relative to the position which you emit at | ||
| emission_rain.start_position.mode = EMISSION_PROPERTY_MODE_RANDOM; | ||
| emission_rain.start_position.min_v2 = v2(-16, -16); | ||
| emission_rain.start_position.max_v2 = v2(16, 16); | ||
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| emission_rain.velocity.mode = EMISSION_PROPERTY_MODE_RANDOM; | ||
| emission_rain.velocity.min_v2 = v2(-1000, -1000); | ||
| emission_rain.velocity.max_v2 = v2( 1000, 1000); | ||
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| emission_rain.acceleration.flat_v2 = v2(0, -2500); | ||
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| // | ||
| // Poof | ||
| emission_poof.kind_pool[0] = PARTICLE_KIND_RECTANGLE; | ||
| emission_poof.number_of_kinds = 1; | ||
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| emission_poof.number_of_particles = 10; | ||
| emission_poof.emissions_per_second = 100; | ||
| emission_poof.loop = false; | ||
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| // If we don't loop, the emission will get released when done. | ||
| // Alternatilvely, we set persist to true so we can keep it around to reset | ||
| // and potentially release manually with emission_release() | ||
| emission_poof.persist = true; | ||
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| emission_poof.life_time.flat_f32 = 1.6; | ||
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| emission_poof.velocity.mode = EMISSION_PROPERTY_MODE_RANDOM; | ||
| emission_poof.velocity.min_v2 = v2(-300, -300); | ||
| emission_poof.velocity.max_v2 = v2( 300, 300); | ||
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| emission_poof.rotational_acceleration.mode = EMISSION_PROPERTY_MODE_RANDOM; | ||
| emission_poof.rotational_acceleration.min_f32 = -TAU32; | ||
| emission_poof.rotational_acceleration.max_f32 = TAU32; | ||
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| // Fade out | ||
| emission_poof.color.mode = EMISSION_PROPERTY_MODE_INTERPOLATE; | ||
| emission_poof.color.min_v4 = COLOR_WHITE; | ||
| emission_poof.color.max_v4 = v4_zero; | ||
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| // Shrink until death | ||
| emission_poof.size.mode = EMISSION_PROPERTY_MODE_INTERPOLATE; | ||
| emission_poof.size.interp_kind = EMISSION_INTERPOLATION_SMOOTH; | ||
| emission_poof.size.min_v2 = v2(16, 16); | ||
| emission_poof.size.max_v2 = v2(0, 0); | ||
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| // For centered rotations, the pivot should interpolate same as size (but half) | ||
| emission_poof.pivot.mode = EMISSION_PROPERTY_MODE_INTERPOLATE; | ||
| emission_poof.pivot.interp_kind = EMISSION_INTERPOLATION_SMOOTH; | ||
| emission_poof.pivot.min_v2 = v2(8, 8); | ||
| emission_poof.pivot.max_v2 = v2(0, 0); | ||
| } |
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