Merge pull request #14 from omnisci3nce/realign

Realign

1 files changed, 122 insertions, 0 deletions

diff --git a/examples/skinned_animation/ex_skinned_animation.c b/examples/skinned_animation/ex_skinned_animation.c
new file mode 100644
index 0000000..c31e93c
--- /dev/null
+++ b/examples/skinned_animation/ex_skinned_animation.c
@@ -0,0 +1,122 @@
+#include <assert.h>
+#include <glfw3.h>
+
+#include "../example_scene.h"
+#include "animation.h"
+#include "camera.h"
+#include "core.h"
+#include "input.h"
+#include "keys.h"
+#include "log.h"
+#include "maths.h"
+#include "maths_types.h"
+#include "primitives.h"
+#include "render.h"
+#include "render_backend.h"
+#include "render_types.h"
+
+typedef struct game_state {
+  camera camera;
+  vec3 camera_euler;
+  bool first_mouse_update;  // so the camera doesnt lurch when you run the first
+                            // process_camera_rotation
+} game_state;
+
+void update_camera_rotation(input_state* input, game_state* game, camera* cam);
+
+int main() {
+  double currentFrame = glfwGetTime();
+  double lastFrame = currentFrame;
+  double deltaTime;
+
+  core* core = core_bringup();
+
+  model_handle handle =
+      model_load_gltf(core, "assets/models/gltf/SimpleSkin/glTF/SimpleSkin.gltf", false);
+
+  model* simple_skin = &core->models->data[handle.raw];
+
+  // Okay, right here we've loaded the model. let's assert some facts
+  assert(simple_skin->animations->len == 1);
+  assert(simple_skin->animations->data[0].rotation != NULL);
+  assert(simple_skin->animations->data[0].translation == NULL);
+  assert(simple_skin->animations->data[0].scale == NULL);
+
+  mesh* m = &simple_skin->meshes->data[0];
+  assert(m->is_skinned);
+  assert(m->bones->len == 2);  // 1 root and 1 extra joint
+
+  // assert(false);
+
+  model_upload_meshes(&core->renderer, simple_skin);
+
+  scene our_scene = make_default_scene();
+
+  vec3 cam_pos = vec3_create(0, 5, -8);
+  game_state game = {
+    .camera = camera_create(cam_pos, vec3_negate(cam_pos), VEC3_Y, deg_to_rad(45.0)),
+    .camera_euler = vec3_create(90, 0, 0),
+    .first_mouse_update = true,
+  };
+
+  print_vec3(game.camera.front);
+
+  // Main loop
+  const f32 camera_lateral_speed = 0.2;
+  const f32 camera_zoom_speed = 0.10;
+
+  // animation
+  animation_clip track = simple_skin->animations->data[0];
+  f64 total_time = 0.0;
+
+  while (!should_exit(core)) {
+    input_update(&core->input);
+
+    currentFrame = glfwGetTime();
+    deltaTime = currentFrame - lastFrame;
+    lastFrame = currentFrame;
+    total_time += deltaTime;
+    // printf("delta time %f\n", deltaTime);
+    f64 t = fmod(total_time, track.rotation->max);
+    // INFO("Total time: %f", t);
+
+    vec3 translation = VEC3_ZERO;
+    if (key_is_pressed(KEYCODE_W)) {
+      translation = vec3_mult(game.camera.front, camera_zoom_speed);
+    } else if (key_is_pressed(KEYCODE_KEY_UP)) {
+      translation = vec3_mult(game.camera.up, camera_lateral_speed);
+    } else if (key_is_pressed(KEYCODE_KEY_DOWN)) {
+      translation = vec3_mult(game.camera.up, -camera_lateral_speed);
+    } else if (key_is_pressed(KEYCODE_S) || key_is_pressed(KEYCODE_KEY_DOWN)) {
+      translation = vec3_mult(game.camera.front, -camera_zoom_speed);
+    } else if (key_is_pressed(KEYCODE_A) || key_is_pressed(KEYCODE_KEY_LEFT)) {
+      vec3 lateral = vec3_normalise(vec3_cross(game.camera.front, game.camera.up));
+      translation = vec3_mult(lateral, -camera_lateral_speed);
+    } else if (key_is_pressed(KEYCODE_D) || key_is_pressed(KEYCODE_KEY_RIGHT)) {
+      vec3 lateral = vec3_normalise(vec3_cross(game.camera.front, game.camera.up));
+      translation = vec3_mult(lateral, camera_lateral_speed);
+    }
+    game.camera.position = vec3_add(game.camera.position, translation);
+
+    render_frame_begin(&core->renderer);
+
+    // bone rotation
+    quat rot = animation_sample(track.rotation, t).rotation;
+
+    m->bones->data[1].transform_components.rotation = rot;
+
+    // quat rot = quat_ident();
+    transform tf = transform_create(VEC3_ZERO, quat_ident(), 1.0);
+
+    draw_skinned_model(&core->renderer, &game.camera, simple_skin, tf, &our_scene);
+
+    render_frame_end(&core->renderer);
+  }
+
+  INFO("Shutting down");
+  model_destroy(simple_skin);
+
+  core_shutdown(core);
+
+  return 0;
+}