1 files changed, 90 insertions, 0 deletions
diff --git a/archive/src/animation.c b/archive/src/animation.c
new file mode 100644
index 0000000..d7973dc
--- /dev/null
+++ b/archive/src/animation.c
@@ -0,0 +1,90 @@
+#include "animation.h"
+#include "immdraw.h"
+#include "log.h"
+#include "maths.h"
+#include "maths_types.h"
+#include "ral_types.h"
+
+Keyframe Animation_Sample(AnimationSampler* sampler, f32 t) {
+  size_t previous_index = 0;
+  f32 previous_time = 0.0;
+  // look forwards
+  DEBUG("%d\n", keyframe_kind_strings[sampler->animation.values.kind]);
+  TRACE("Total timestamps %d", sampler->animation.n_timestamps);
+  for (u32 i = 0; i < sampler->animation.n_timestamps; i++) {
+    f32 current_time = sampler->animation.timestamps[i];
+    if (current_time > t) {
+      break;
+    }
+    previous_time = sampler->animation.timestamps[i];
+    previous_index = i;
+  }
+
+  size_t next_index = (previous_index + 1) % sampler->animation.n_timestamps;
+  f32 next_time = sampler->animation.timestamps[next_index];
+  printf("%d %f %d %f\n", previous_index, previous_time, next_index, next_time);
+
+  Keyframe prev_value = sampler->animation.values.values[previous_index];
+  Keyframe next_value = sampler->animation.values.values[next_index];
+
+  printf("%d %d\n", previous_index, next_index);
+
+  f32 time_diff =
+      sampler->animation.timestamps[next_index] - sampler->animation.timestamps[previous_index];
+  f32 percent = (t - previous_time) / time_diff;
+
+  switch (sampler->animation.values.kind) {
+    case KEYFRAME_ROTATION:
+      return (Keyframe){ .rotation = quat_slerp(
+                             sampler->animation.values.values[previous_index].rotation,
+                             sampler->animation.values.values[next_index].rotation, percent) };
+    case KEYFRAME_TRANSLATION:
+    case KEYFRAME_SCALE:
+    case KEYFRAME_WEIGHTS:
+      WARN("TODO: other keyframe kind interpolation");
+      return prev_value;
+  }
+}
+
+void Animation_Tick(AnimationClip* clip, Armature* armature, f32 time) {
+  TRACE("Ticking animation %s", clip->clip_name);
+
+  for (u32 c_i = 0; c_i < clip->channels->len; c_i++) {
+    AnimationSampler* sampler = clip->channels->data;
+
+    // Interpolated keyframe based on time
+    Keyframe k = Animation_Sample(sampler, time);
+
+    // Get the joint in the armature
+    Joint* joint = &armature->joints->data[sampler->target_joint_idx];
+    if (sampler->animation.values.kind == KEYFRAME_ROTATION) {
+      // Update the joints rotation
+      joint->transform_components.rotation = k.rotation;
+    } else {
+      WARN("not yet implemented animation kind");
+    }
+  }
+}
+
+void Animation_VisualiseJoints(Armature* armature) {
+  for (int j = 0; j < armature->joints->len; j++) {
+    Joint joint = armature->joints->data[j];
+    Transform tf = joint.transform_components;
+    tf.scale = vec3(0.05, 0.05, 0.05);
+    Immdraw_Sphere(tf, vec4(0, 1, 1, 1), true);
+  }
+}
+
+ShaderDataLayout AnimData_GetLayout(void* data) {
+  AnimDataUniform* d = data;
+  bool has_data = data != NULL;
+
+  ShaderBinding b1 = { .label = "AnimData",
+                       .kind = BINDING_BYTES,
+                       .data.bytes.size = sizeof(AnimDataUniform) };
+
+  if (has_data) {
+    b1.data.bytes.data = d;
+  }
+  return (ShaderDataLayout){ .bindings = { b1 }, .binding_count = 1 };
+}