Merge branch 'master' of github.com:omnisci3nce/celeritas-core

1 files changed, 71 insertions, 0 deletions

diff --git a/examples/obj_loading/ex_obj_loading.c b/examples/obj_loading/ex_obj_loading.c
new file mode 100644
index 0000000..6f1f12a
--- /dev/null
+++ b/examples/obj_loading/ex_obj_loading.c
@@ -0,0 +1,71 @@
+#include <glfw3.h>
+#include <string.h>
+
+#include "camera.h"
+#include "core.h"
+#include "maths.h"
+#include "maths_types.h"
+#include "render.h"
+#include "render_types.h"
+
+const vec3 pointlight_positions[4] = {
+  { 0.7, 0.2, 2.0 },
+  { 2.3, -3.3, -4.0 },
+  { -4.0, 2.0, -12.0 },
+  { 0.0, 0.0, -3.0 },
+};
+point_light point_lights[4];
+
+int main() {
+  core* core = core_bringup();
+
+  // --- Set up our scene
+
+  // 1. load model from disk
+  model_handle backpack_handle =
+      model_load_obj(core, "assets/models/obj/backpack/backpack.obj", true);
+  model* backpack = &core->models->data[backpack_handle.raw];
+  // 2. upload vertex data to gpu
+  model_upload_meshes(&core->renderer, backpack);
+  // 3. create a camera
+  vec3 camera_pos = vec3(3., 4., 10.);
+  vec3 camera_front = vec3_normalise(vec3_negate(camera_pos));
+  camera cam = camera_create(camera_pos, camera_front, VEC3_Y, deg_to_rad(45.0));
+  // 4. create lights
+
+  // directional (sun) light setup
+  directional_light dir_light = { .direction = (vec3){ -0.2, -1.0, -0.3 },
+                                  .ambient = (vec3){ 0.2, 0.2, 0.2 },
+                                  .diffuse = (vec3){ 0.5, 0.5, 0.5 },
+                                  .specular = (vec3){ 1.0, 1.0, 1.0 } };
+  // point lights setup
+  for (int i = 0; i < 4; i++) {
+    point_lights[i].position = pointlight_positions[i];
+    point_lights[i].ambient = (vec3){ 0.05, 0.05, 0.05 };
+    point_lights[i].diffuse = (vec3){ 0.8, 0.8, 0.8 };
+    point_lights[i].specular = (vec3){ 1.0, 1.0, 1.0 };
+    point_lights[i].constant = 1.0;
+    point_lights[i].linear = 0.09;
+    point_lights[i].quadratic = 0.032;
+  }
+
+  scene our_scene = { .dir_light = dir_light, .n_point_lights = 4 };
+  memcpy(&our_scene.point_lights, &point_lights, sizeof(point_light[4]));
+
+  // --- Enter Main loop
+  while (!glfwWindowShouldClose(core->renderer.window)) {
+    input_update(&core->input);
+    threadpool_process_results(&core->threadpool, 1);
+
+    render_frame_begin(&core->renderer);
+
+    // Draw the backpack
+    transform model_tf =
+        transform_create(VEC3_ZERO, quat_ident(), 2.0);  // make the backpack a bit bigger
+    draw_model(&core->renderer, &cam, backpack, model_tf, &our_scene);
+
+    render_frame_end(&core->renderer);
+  }
+
+  return 0;
+}