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#include "plugin.h"
#include <gfx/renderer.h>
#include <gfx/scene.h>
#include <gfx/util/scene.h>
#include <gfx/util/skyquad.h>
#include <gfx/util/texture.h>
#include <math/camera.h>
#include <math/spatial3.h>
#include <stdlib.h>
// Paths to various scene files.
static const char* BOX = "/assets/models/box.gltf";
static const char* SUZANNE = "/assets/models/suzanne.gltf";
static const char* SPONZA =
"/assets/glTF-Sample-Models/2.0/Sponza/glTF/Sponza.gltf";
static const char* FLIGHT_HELMET =
"/assets/glTF-Sample-Models/2.0/FlightHelmet/glTF/FlightHelmet.gltf";
static const char* DAMAGED_HELMET =
"/assets/glTF-Sample-Models/2.0/DamagedHelmet/glTF/DamagedHelmet.gltf";
static const char* GIRL =
"/home/jeanne/Nextcloud/assets/models/girl/girl-with-ground.gltf";
#define DEFAULT_SCENE_FILE GIRL
struct State {
Scene* scene;
SceneCamera* camera;
};
/// Load the skyquad texture.
static Texture* load_environment_map(RenderBackend* render_backend) {
return gfx_load_texture(
render_backend,
&(LoadTextureCmd){
.origin = TextureFromFile,
.type = LoadCubemap,
.colour_space = sRGB,
.filtering = NearestFiltering,
.mipmaps = false,
.data.cubemap.filepaths = {
mstring_make("/assets/skybox/clouds1/clouds1_east.bmp"),
mstring_make("/assets/skybox/clouds1/clouds1_west.bmp"),
mstring_make("/assets/skybox/clouds1/clouds1_up.bmp"),
mstring_make("/assets/skybox/clouds1/clouds1_down.bmp"),
mstring_make("/assets/skybox/clouds1/clouds1_south.bmp"),
mstring_make("/assets/skybox/clouds1/clouds1_north.bmp")}
});
}
/// Load the skyquad and return the environment light node.
static SceneNode* load_skyquad(RenderBackend* render_backend, SceneNode* root) {
assert(render_backend);
assert(root);
Texture* environment_map = load_environment_map(render_backend);
if (!environment_map) {
return 0;
}
return gfx_setup_skyquad(render_backend, root, environment_map);
}
/// Load the 3D scene.
static SceneNode* load_scene(
Game* game, State* state, const char* scene_filepath) {
assert(game);
assert(game->gfx);
assert(state);
assert(state->scene);
SceneNode* root = gfx_get_scene_root(state->scene);
RenderBackend* render_backend = gfx_get_render_backend(game->gfx);
Camera* camera = gfx_get_camera_camera(state->camera);
spatial3_set_position(&camera->spatial, vec3_make(0, 0, 2));
SceneNode* sky_light_node = load_skyquad(render_backend, root);
if (!sky_light_node) {
return 0;
}
SceneNode* scene_node = gfx_load_scene(
game->gfx, sky_light_node,
&(LoadSceneCmd){.origin = SceneFromFile, .filepath = scene_filepath});
if (!scene_node) {
return 0;
}
gfx_log_node_hierarchy(root);
return scene_node;
}
bool init(Game* game, State** pp_state) {
assert(game);
State* state = calloc(1, sizeof(State));
if (!state) {
goto cleanup;
}
if (!(state->scene = gfx_make_scene())) {
goto cleanup;
}
if (!(state->camera = gfx_make_camera())) {
goto cleanup;
}
const int argc = game->argc;
const char** argv = game->argv;
// Usage: <scene file>
const char* scene_filepath = argc > 1 ? argv[1] : DEFAULT_SCENE_FILE;
SceneNode* node = load_scene(game, state, scene_filepath);
if (!node) {
goto cleanup;
}
Anima* anima = gfx_get_node_anima(node);
gfx_play_animation(
anima, &(AnimationPlaySettings){.name = "Walk", .loop = true});
*pp_state = state;
return true;
cleanup:
shutdown(game, state);
if (state) {
free(state);
}
return false;
}
void shutdown(Game* game, State* state) {
assert(game);
if (state) {
gfx_destroy_camera(&state->camera);
gfx_destroy_scene(&state->scene);
// State freed by plugin engine.
}
}
void update(Game* game, State* state, double t, double dt) {
assert(game);
assert(state);
assert(state->scene);
assert(state->camera);
gfx_animate_scene(state->scene, (R)t);
const vec3 orbit_point = vec3_make(0, 2, 0);
Camera* camera = gfx_get_camera_camera(state->camera);
spatial3_orbit(
&camera->spatial, orbit_point,
/*radius=*/2.5,
/*azimuth=*/t * 0.5, /*zenith=*/0);
spatial3_lookat(&camera->spatial, orbit_point);
}
/// Render the bounding boxes of all scene objects.
static void render_bounding_boxes(ImmRenderer* imm, const SceneNode* node) {
if (gfx_get_node_type(node) == ObjectNode) {
// TODO: Look at the scene log. The JointNodes are detached from the
// ObjectNodes. This is why the boxes are not being transformed as expected
// here. Anima needs to animate boxes? Use OOBB in addition to AABB?
const mat4 model = gfx_get_node_global_transform(node);
const SceneObject* obj = gfx_get_node_object(node);
const aabb3 box = gfx_calc_object_aabb(obj);
gfx_imm_set_model_matrix(imm, &model);
gfx_imm_draw_aabb(imm, box);
}
// Render children's boxes.
for (NodeIter it = gfx_get_node_child(node); it;
it = gfx_get_next_child(it)) {
render_bounding_boxes(imm, gfx_get_iter_node(it));
}
}
void render(const Game* game, const State* state) {
assert(state);
assert(game);
assert(game->gfx);
assert(state->scene);
assert(state->camera);
ImmRenderer* imm = gfx_get_imm_renderer(game->gfx);
assert(imm);
gfx_imm_start(imm);
gfx_imm_set_camera(imm, gfx_get_camera_camera(state->camera));
gfx_imm_set_colour(imm, vec4_make(0.2, 0.2, 1.0, 0.3));
render_bounding_boxes(imm, gfx_get_scene_root(state->scene));
gfx_imm_end(imm);
}
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