static bool init(Gfx_API api);
static void cleanup();
static void display();
+static bool gen_poisson(std::vector<Vec2> &points, float min_dist, float radius);
/* glfw callbacks */
static float fog_density;
+static int num_cows = 400;
+static float cow_gap = 4;
static Scene *cow_scene;
-static Object *cow_object;
static MorphRenderer *cow_rend;
static Terrain terrain;
+static TerrainParams p;
static Texture *skybox_tex;
+static Texture *irradiance_tex;
static Texture *terrain_tex;
static Material terrain_mat;
static Renderer *terrain_rend;
camera = new OrbitCamera;
- cow_scene = new Scene;
- if(!cow_scene->load("data/spot/spot.obj")) {
- fprintf(stderr, "Failed to load scene: spot.obj.\n");
- return false;
- }
-
- cow_rend = new MorphRenderer;
- cow_rend->camera = camera;
- cow_rend->scene = cow_scene;
-
- if(!cow_rend->create()) {
- fprintf(stderr, "Failed to create renderer for cows.\n");
- return false;
- }
-
- cow_object = cow_scene->objects[0];
-
terrain_tex = gfx_create_texture();
if(!terrain_tex->load("data/grass.jpeg")) {
fprintf(stderr, "Failed to load ground texture.\n");
return false;
}
- TerrainParams p;
p.xsz = 200;
p.ysz = 200;
p.max_height = 30;
skybox_tex->load("data/cubemap/cubemap.hdr");
terrain_rend->set_sky_tex(skybox_tex);
+ irradiance_tex = gfx_create_texture();
+ irradiance_tex->load("data/cubemap/irradiance.hdr");
+ terrain_rend->set_diffuse_sky_tex(irradiance_tex);
+
if(!terrain_rend->create()) {
fprintf(stderr, "terrain fail\n");
return false;
}
+ terrain_rend->fog_density = fog_density;
+
+ cow_scene = new Scene;
+ if(!cow_scene->load("data/spot/spot.obj")) {
+ fprintf(stderr, "Failed to load scene: spot.obj.\n");
+ return false;
+ }
+
+ cow_rend = new MorphRenderer;
+ cow_rend->camera = camera;
+ cow_rend->scene = cow_scene;
+ cow_rend->fog_density = fog_density;
+
+ if(!cow_rend->create()) {
+ fprintf(stderr, "Failed to create renderer for cows.\n");
+ return false;
+ }
+
+ /* create cow objects */
+ Object *cow0 = cow_scene->objects[0];
+ cow0->transform.rotation_y(M_PI);
+ cow_scene->objects.clear();
+
+ float disk_radius = std::min(p.xsz, p.ysz) / 2.0 * 0.65;
+ std::vector<Vec2> cow_pos;
+ for(int i=0; i<num_cows; i++) {
+ Object *cow = new Object;
+ *cow = *cow0;
+
+ if (!gen_poisson(cow_pos, cow_gap, disk_radius))
+ goto cowgen_end;
+ Vec2 pos = cow_pos.back();
+ float y = terrain.get_height(Vec3(pos.x, 1, pos.y));
+
+ cow->transform.translate(pos.x, y, pos.y);
+ cow_scene->objects.push_back(cow);
+ }
+
+cowgen_end:
+ printf("generated: %d cows from %d\n", (int)cow_pos.size(), num_cows);
+ delete cow0;
return true;
}
delete cow_scene;
delete cow_rend;
-//TODO
+ delete skybox_tex;
+ delete irradiance_tex;
delete terrain_tex;
delete terrain_rend;
+
gfx_cleanup();
}
move_camera = !move_camera;
break;
- case 'F':
- fog_density = fog_density < 1 - 0.0009 ? fog_density + 0.0001 : 1;
- break;
+ // case 'F':
+ // fog_density = fog_density < 1 - 0.0009 ? fog_density + 0.0001 : 1;
+ // break;
- case 'U':
- fog_density = fog_density > 0.0001 ? fog_density - 0.0001 : 0;
- break;
+ // case 'U':
+ // fog_density = fog_density > 0.0001 ? fog_density - 0.0001 : 0;
+ // break;
default:
break;
gfx_clear(0.1, 0.1, 0.1);
- printf("fog_density: %f\n", fog_density);
- terrain_rend->fog_density = fog_density;
terrain_rend->draw();
-
- cow_pos.y = terrain.get_height(cow_pos);
- cow_object->transform.translation(cow_pos);
cow_rend->draw();
+}
+
+static bool gen_poisson(std::vector<Vec2> &points, float min_dist, float radius)
+{
+ /* poisson radius */
+ for (int i = 0; i < 1000; i++)
+ {
+ float angle = (float)rand() / (float)RAND_MAX * 2 * M_PI;
+ float r = sqrt((float)rand() / (float)RAND_MAX) * radius;
+
+ Vec2 p;
+ p.x = cos(angle) * r;
+ p.y = sin(angle) * r;
+
+ bool valid = true;
+ for(size_t j=0; j<points.size(); j++) {
+ if(length_sq(points[j] - p) < min_dist * min_dist) {
+ valid = false;
+ break;
+ }
+ }
+ if(valid) {
+ points.push_back(p);
+ return true;
+ }
+ }
+ return false;
}
\ No newline at end of file