1 files changed, 764 insertions, 1 deletions

diff --git a/src/resources/gltf.c b/src/resources/gltf.c
index b646f58..81992d1 100644
--- a/src/resources/gltf.c
+++ b/src/resources/gltf.c
@@ -1 +1,764 @@
-// TODO: Port code from old repo
\ No newline at end of file
+#include <assert.h>
+#include <stdlib.h>
+#include <string.h>
+#include "animation.h"
+#include "core.h"
+#include "defines.h"
+#include "file.h"
+#include "loaders.h"
+#include "log.h"
+#include "maths.h"
+#include "maths_types.h"
+#include "mem.h"
+#include "path.h"
+#include "render.h"
+#include "render_backend.h"
+#include "render_types.h"
+#include "str.h"
+
+#define CGLTF_IMPLEMENTATION
+#include <cgltf.h>
+
+struct face {
+  cgltf_uint indices[3];
+};
+typedef struct face face;
+
+KITC_DECL_TYPED_ARRAY(vec3)
+KITC_DECL_TYPED_ARRAY(vec2)
+KITC_DECL_TYPED_ARRAY(u32)
+KITC_DECL_TYPED_ARRAY(vec4u)
+KITC_DECL_TYPED_ARRAY(vec4)
+KITC_DECL_TYPED_ARRAY(face)
+// KITC_DECL_TYPED_ARRAY(joint)
+
+bool model_load_gltf_str(const char *file_string, const char *filepath, str8 relative_path,
+                         model *out_model, bool invert_textures_y);
+
+model_handle model_load_gltf(struct core *core, const char *path, bool invert_texture_y) {
+  size_t arena_size = 1024;
+  arena scratch = arena_create(malloc(arena_size), arena_size);
+
+  TRACE("Loading model at Path %s\n", path);
+  path_opt relative_path = path_parent(&scratch, path);
+  if (!relative_path.has_value) {
+    WARN("Couldnt get a relative path for the path to use for loading materials & textures later");
+  }
+  const char *file_string = string_from_file(path);
+
+  model model = { 0 };
+  model.name = str8_cstr_view(path);
+  model.meshes = mesh_darray_new(1);
+  model.materials = material_darray_new(1);
+
+  bool success =
+      model_load_gltf_str(file_string, path, relative_path.path, &model, invert_texture_y);
+
+  if (!success) {
+    FATAL("Couldnt load OBJ file at path %s", path);
+    ERROR_EXIT("Load fails are considered crash-worthy right now. This will change later.\n");
+  }
+
+  u32 index = model_darray_len(core->models);
+  model_darray_push(core->models, model);
+
+  arena_free_all(&scratch);
+  arena_free_storage(&scratch);
+  return (model_handle){ .raw = index };
+}
+
+void assert_path_type_matches_component_type(cgltf_animation_path_type target_path,
+                                             cgltf_accessor *output) {
+  if (target_path == cgltf_animation_path_type_rotation) {
+    assert(output->component_type == cgltf_component_type_r_32f);
+    assert(output->type == cgltf_type_vec4);
+  }
+}
+
+// TODO: Brainstorm how I can make this simpler and break it up into more testable pieces
+
+bool model_load_gltf_str(const char *file_string, const char *filepath, str8 relative_path,
+                         model *out_model, bool invert_textures_y) {
+  TRACE("Load GLTF from string");
+
+  // Setup temps
+  vec3_darray *tmp_positions = vec3_darray_new(1000);
+  vec3_darray *tmp_normals = vec3_darray_new(1000);
+  vec2_darray *tmp_uvs = vec2_darray_new(1000);
+  vec4u_darray *tmp_joint_indices = vec4u_darray_new(1000);
+  vec4_darray *tmp_weights = vec4_darray_new(1000);
+  joint_darray *tmp_joints = joint_darray_new(256);
+  vertex_bone_data_darray *tmp_vertex_bone_data = vertex_bone_data_darray_new(1000);
+
+  cgltf_options options = { 0 };
+  cgltf_data *data = NULL;
+  cgltf_result result = cgltf_parse_file(&options, filepath, &data);
+  if (result != cgltf_result_success) {
+    WARN("gltf load failed");
+    // TODO: cleanup arrays(allocate all from arena ?)
+    return false;
+  }
+
+  cgltf_load_buffers(&options, data, filepath);
+  DEBUG("loaded buffers");
+
+  // --- Skin
+  size_t num_skins = data->skins_count;
+  bool is_skinned = false;
+  if (num_skins == 1) {
+    is_skinned = true;
+  } else if (num_skins > 1) {
+    WARN("GLTF files with more than 1 skin are not supported");
+    return false;
+  }
+
+  if (is_skinned) {
+    cgltf_skin *gltf_skin = data->skins;
+    DEBUG("loading skin %s", gltf_skin->name);
+    size_t num_joints = gltf_skin->joints_count;
+    DEBUG("# Joints %d", num_joints);
+
+    cgltf_accessor *gltf_inverse_bind_matrices = gltf_skin->inverse_bind_matrices;
+
+    // for each one we'll spit out a joint
+    for (size_t i = 0; i < num_joints; i++) {
+      cgltf_node *joint_node = gltf_skin->joints[i];
+
+      joint joint_i = { .name = "testjoint" };
+      if (joint_node->children_count > 0 && !joint_node->has_translation &&
+          !joint_node->has_rotation) {
+        WARN("joint Node with index %d is the root node", i);
+        joint_i.transform_components = TRANSFORM_DEFAULT;
+      } else {
+        TRACE("Storing joint transform");
+        joint_i.transform_components = TRANSFORM_DEFAULT;
+        if (joint_node->has_translation) {
+          memcpy(&joint_i.transform_components.position, &joint_node->translation, 3 * sizeof(f32));
+        }
+        if (joint_node->has_rotation) {
+          memcpy(&joint_i.transform_components.rotation, &joint_node->rotation, 4 * sizeof(f32));
+        }
+        // TODO: support scaling as vec instead of float
+      }
+      joint_i.local_transform = transform_to_mat(&joint_i.transform_components);
+      cgltf_accessor_read_float(gltf_inverse_bind_matrices, i, &joint_i.inverse_bind_matrix.data[0],
+                                16);
+      joint_darray_push(tmp_joints, joint_i);
+    }
+  }
+
+  // --- Materials
+  TRACE("Num materials %d", data->materials_count);
+  size_t num_materials = data->materials_count;
+  for (size_t m = 0; m < num_materials; m++) {
+    cgltf_material gltf_material = data->materials[m];
+    material our_material = DEFAULT_MATERIAL;
+
+    strcpy(our_material.name, gltf_material.name);
+
+    cgltf_pbr_metallic_roughness pbr = gltf_material.pbr_metallic_roughness;
+    if (gltf_material.has_pbr_metallic_roughness) {
+      // we will use base color texture like blinn phong
+      cgltf_texture_view diff_tex_view = pbr.base_color_texture;
+
+      char diffuse_map_path[1024];
+      snprintf(diffuse_map_path, sizeof(diffuse_map_path), "%s/%s", relative_path.buf,
+               diff_tex_view.texture->image->uri);
+
+      strcpy(our_material.diffuse_tex_path, diffuse_map_path);
+      texture diffuse_texture = texture_data_load(our_material.diffuse_tex_path, false);
+      texture_data_upload(&diffuse_texture);
+      our_material.diffuse_texture = diffuse_texture;
+
+      cgltf_texture_view specular_tex_view = pbr.metallic_roughness_texture;
+
+      char specular_map_path[1024];
+      snprintf(specular_map_path, sizeof(specular_map_path), "%s/%s", relative_path.buf,
+               specular_tex_view.texture->image->uri);
+
+      strcpy(our_material.specular_tex_path, specular_map_path);
+      texture specular_texture = texture_data_load(our_material.specular_tex_path, false);
+      texture_data_upload(&specular_texture);
+      our_material.specular_texture = specular_texture;
+    }
+
+    material_darray_push(out_model->materials, our_material);
+  }
+
+  // --- Meshes
+  TRACE("Num meshes %d", data->meshes_count);
+  size_t num_meshes = data->meshes_count;
+  for (size_t m = 0; m < num_meshes; m++) {
+    cgltf_primitive primitive = data->meshes[m].primitives[0];
+    DEBUG("Found %d attributes", primitive.attributes_count);
+    // DEBUG("Number of this primitive %d", primitive.)
+
+    for (int a = 0; a < data->meshes[m].primitives[0].attributes_count; a++) {
+      cgltf_attribute attribute = data->meshes[m].primitives[0].attributes[a];
+      if (attribute.type == cgltf_attribute_type_position) {
+        TRACE("Load positions from accessor");
+
+        cgltf_accessor *accessor = attribute.data;
+        assert(accessor->component_type == cgltf_component_type_r_32f);
+        // CASSERT_MSG(accessor->type == cgltf_type_vec3, "Vertex positions should be a vec3");
+
+        TRACE("Loading %d vec3 components", accessor->count);
+
+        for (cgltf_size v = 0; v < accessor->count; ++v) {
+          vec3 pos;
+          cgltf_accessor_read_float(accessor, v, &pos.x, 3);
+          vec3_darray_push(tmp_positions, pos);
+        }
+
+      } else if (attribute.type == cgltf_attribute_type_normal) {
+        TRACE("Load normals from accessor");
+
+        cgltf_accessor *accessor = attribute.data;
+        assert(accessor->component_type == cgltf_component_type_r_32f);
+        // CASSERT_MSG(accessor->type == cgltf_type_vec3, "Normal vectors should be a vec3");
+
+        for (cgltf_size v = 0; v < accessor->count; ++v) {
+          vec3 pos;
+          cgltf_accessor_read_float(accessor, v, &pos.x, 3);
+          vec3_darray_push(tmp_normals, pos);
+        }
+
+      } else if (attribute.type == cgltf_attribute_type_texcoord) {
+        TRACE("Load texture coordinates from accessor");
+        cgltf_accessor *accessor = attribute.data;
+        assert(accessor->component_type == cgltf_component_type_r_32f);
+        // CASSERT_MSG(accessor->type == cgltf_type_vec2, "Texture coordinates should be a vec2");
+
+        for (cgltf_size v = 0; v < accessor->count; ++v) {
+          vec2 tex;
+          bool success = cgltf_accessor_read_float(accessor, v, &tex.x, 2);
+          if (!success) {
+            ERROR("Error loading tex coord");
+          }
+          vec2_darray_push(tmp_uvs, tex);
+        }
+      } else if (attribute.type == cgltf_attribute_type_joints) {
+        TRACE("Load joint indices from accessor");
+        cgltf_accessor *accessor = attribute.data;
+        assert(accessor->component_type == cgltf_component_type_r_16u);
+        assert(accessor->type == cgltf_type_vec4);
+        vec4u joint_indices;
+        vec4 joints_as_floats;
+        for (cgltf_size v = 0; v < accessor->count; ++v) {
+          cgltf_accessor_read_float(accessor, v, &joints_as_floats.x, 4);
+          joint_indices.x = (u32)joints_as_floats.x;
+          joint_indices.y = (u32)joints_as_floats.y;
+          joint_indices.z = (u32)joints_as_floats.z;
+          joint_indices.w = (u32)joints_as_floats.w;
+          printf("Joints affecting vertex %d :  %d %d %d %d\n", v, joint_indices.x, joint_indices.y,
+                 joint_indices.z, joint_indices.w);
+          vec4u_darray_push(tmp_joint_indices, joint_indices);
+        }
+
+      } else if (attribute.type == cgltf_attribute_type_weights) {
+        TRACE("Load joint weights from accessor");
+        cgltf_accessor *accessor = attribute.data;
+        assert(accessor->component_type == cgltf_component_type_r_32f);
+        assert(accessor->type == cgltf_type_vec4);
+
+        for (cgltf_size v = 0; v < accessor->count; ++v) {
+          vec4 weights;
+          cgltf_accessor_read_float(accessor, v, &weights.x, 4);
+          printf("Weights affecting vertex %d : %f %f %f %f\n", v, weights.x, weights.y, weights.z,
+                 weights.w);
+          vec4_darray_push(tmp_weights, weights);
+        }
+      } else {
+        WARN("Unhandled cgltf_attribute_type: %s. skipping..", attribute.name);
+      }
+    }
+
+    mesh mesh = { 0 };
+    mesh.vertices = vertex_darray_new(10);
+    mesh.vertex_bone_data = vertex_bone_data_darray_new(1);
+
+    if (primitive.material != NULL) {
+      for (int i = 0; i < material_darray_len(out_model->materials); i++) {
+        printf("%s vs %s \n", primitive.material->name, out_model->materials->data[i].name);
+        if (strcmp(primitive.material->name, out_model->materials->data[i].name) == 0) {
+          TRACE("Found material");
+          mesh.material_index = i;
+          break;
+        }
+      }
+    }
+
+    if (is_skinned) {
+      mesh.is_skinned = true;
+      // mesh.vertex_bone_data = vertex_bone_data_darray_new(tmp_joint_indices->len);
+      mesh.bones = joint_darray_new(tmp_joints->len);
+      for (int i = 0; i < tmp_joint_indices->len; i++) {
+        vertex_bone_data data;
+        data.joints = tmp_joint_indices->data[i];
+        data.weights = tmp_weights->data[i];
+        vertex_bone_data_darray_push(tmp_vertex_bone_data,
+                                     data);  // Push the temp data that aligns with raw vertices
+      }
+      for (int i = 0; i < tmp_joints->len; i++) {
+        joint data = tmp_joints->data[i];
+        joint_darray_push(mesh.bones, data);
+      }
+    }
+
+    cgltf_accessor *indices = primitive.indices;
+    if (primitive.indices > 0) {
+      WARN("indices!");
+      mesh.has_indices = true;
+
+      mesh.indices = malloc(indices->count * sizeof(u32));
+      mesh.indices_len = indices->count;
+
+      // store indices
+      for (cgltf_size i = 0; i < indices->count; ++i) {
+        cgltf_uint ei;
+        cgltf_accessor_read_uint(indices, i, &ei, 1);
+        mesh.indices[i] = ei;
+      }
+
+      // fetch and store vertices for each index
+      for (cgltf_size i = 0; i < indices->count; ++i) {
+        vertex vert;
+        cgltf_uint index = mesh.indices[i];
+        vert.position = tmp_positions->data[index];
+        vert.normal = tmp_normals->data[index];
+        vert.uv = tmp_uvs->data[index];
+        vertex_darray_push(mesh.vertices, vert);
+
+        if (is_skinned) {
+          vertex_bone_data vbd = tmp_vertex_bone_data->data[index];  // create a copy
+          vertex_bone_data_darray_push(mesh.vertex_bone_data, vbd);
+        }
+        // for each vertex do the bone data
+      }
+    } else {
+      mesh.has_indices = false;
+      return false;  // TODO
+    }
+
+    mesh_darray_push(out_model->meshes, mesh);
+
+    // clear data for each mesh
+    vec3_darray_clear(tmp_positions);
+    vec3_darray_clear(tmp_normals);
+    vec2_darray_free(tmp_uvs);
+    vec4u_darray_clear(tmp_joint_indices);
+    vec4_darray_clear(tmp_weights);
+    joint_darray_clear(tmp_joints);
+  }
+
+  for (int i = 0; i < out_model->meshes->len; i++) {
+    u32 mat_idx = out_model->meshes->data[i].material_index;
+    printf("Mesh %d Mat index %d Mat name %s\n", i, mat_idx,
+           out_model->materials->data[mat_idx].name);
+  }
+
+  // Animations
+  TRACE("Num animations %d", data->animations_count);
+  size_t num_animations = data->animations_count;
+  if (num_animations > 0) {
+// Create an arena for all animation related data
+#define ANIMATION_STORAGE_ARENA_SIZE (1024 * 1024 * 1024)
+    char *animation_backing_storage = malloc(ANIMATION_STORAGE_ARENA_SIZE);
+    // We'll store data on this arena so we can easily free it all at once later
+    out_model->animation_data_arena =
+        arena_create(animation_backing_storage, ANIMATION_STORAGE_ARENA_SIZE);
+    arena *arena = &out_model->animation_data_arena;
+
+    if (!out_model->animations) {
+      out_model->animations = animation_clip_darray_new(num_animations);
+    }
+
+    for (int anim_idx = 0; anim_idx < data->animations_count; anim_idx++) {
+      cgltf_animation animation = data->animations[anim_idx];
+      animation_clip clip = { 0 };
+
+      for (size_t c = 0; c < animation.channels_count; c++) {
+        cgltf_animation_channel channel = animation.channels[c];
+
+        animation_sampler *sampler = arena_alloc(arena, sizeof(animation_sampler));
+
+        animation_sampler **target_property;
+        keyframe_kind data_type;
+
+        switch (channel.target_path) {
+          case cgltf_animation_path_type_rotation:
+            target_property = &clip.rotation;
+            data_type = KEYFRAME_ROTATION;
+            break;
+          case cgltf_animation_path_type_translation:
+            target_property = &clip.translation;
+            data_type = KEYFRAME_TRANSLATION;
+            break;
+          case cgltf_animation_path_type_scale:
+            target_property = &clip.scale;
+            data_type = KEYFRAME_SCALE;
+            break;
+          case cgltf_animation_path_type_weights:
+            target_property = &clip.weights;
+            data_type = KEYFRAME_WEIGHTS;
+            WARN("Morph target weights arent supported yet");
+            return false;
+          default:
+            WARN("unsupported animation type");
+            return false;
+        }
+        *target_property = sampler;
+
+        sampler->current_index = 0;
+        printf("1 %d index\n", sampler->current_index);
+        sampler->animation.interpolation = INTERPOLATION_LINEAR;
+
+        // keyframe times
+        size_t n_frames = channel.sampler->input->count;
+        assert(channel.sampler->input->component_type == cgltf_component_type_r_32f);
+        // FIXME: CASSERT_MSG function "Expected animation sampler input component to be type f32
+        // (keyframe times)");
+        f32 *times = arena_alloc(arena, n_frames * sizeof(f32));
+        sampler->animation.n_timestamps = n_frames;
+        sampler->animation.timestamps = times;
+        cgltf_accessor_unpack_floats(channel.sampler->input, times, n_frames);
+
+        assert_path_type_matches_component_type(channel.target_path, channel.sampler->output);
+
+        // keyframe values
+        size_t n_values = channel.sampler->output->count;
+        assert(n_frames == n_values);
+
+        keyframes keyframes = { 0 };
+        keyframes.kind = KEYFRAME_ROTATION;
+        keyframes.count = n_values;
+        keyframes.values = arena_alloc(arena, n_values * sizeof(keyframe));
+        for (cgltf_size v = 0; v < channel.sampler->output->count; ++v) {
+          switch (data_type) {
+            case KEYFRAME_ROTATION: {
+              quat rot;
+              cgltf_accessor_read_float(channel.sampler->output, v, &rot.x, 4);
+              // printf("Quat %f %f %f %f\n", rot.x, rot.y, rot.z, rot.w);
+              keyframes.values[v].rotation = rot;
+              break;
+            }
+            case KEYFRAME_TRANSLATION: {
+              vec3 trans;
+              cgltf_accessor_read_float(channel.sampler->output, v, &trans.x, 3);
+              keyframes.values[v].translation = trans;
+              break;
+            }
+            case KEYFRAME_SCALE: {
+              vec3 scale;
+              cgltf_accessor_read_float(channel.sampler->output, v, &scale.x, 3);
+              keyframes.values[v].scale = scale;
+              break;
+            }
+            case KEYFRAME_WEIGHTS: {
+              // TODO
+              break;
+            }
+          }
+        }
+        sampler->animation.values = keyframes;
+
+        sampler->min = channel.sampler->input->min[0];
+        sampler->max = channel.sampler->input->max[0];
+
+        // clip.rotation = sampler;
+        // printf("%d timestamps\n", sampler->animation.n_timestamps);
+        // printf("%d index\n", sampler->current_index);
+      }
+
+      WARN("stuff %ld", clip.rotation->animation.n_timestamps);
+      animation_clip_darray_push(out_model->animations, clip);
+    }
+  }
+
+  return true;
+}
+
+/*
+bool model_load_gltf(const char *path, model *out_model) {
+  TRACE("Load GLTF %s", path);
+
+  // Setup temp arrays
+  kitc_darray *tmp_positions = kitc_darray_new(sizeof(vec3), 1000);
+  kitc_darray *tmp_normals = kitc_darray_new(sizeof(vec3), 1000);
+  kitc_darray *tmp_uvs = kitc_darray_new(sizeof(vec2), 1000);
+
+  // may as well just init with max capacity as we're just gonna free at end of this function anyway
+  bh_material_darray *materials = bh_material_darray_new(MAX_MATERIALS);
+  CASSERT(materials->len == 0);
+
+  cgltf_options options = {0};
+  cgltf_data *data = NULL;
+  cgltf_result result = cgltf_parse_file(&options, path, &data);
+  if (result == cgltf_result_success) {
+    DEBUG("gltf loaded succesfully");
+
+    cgltf_load_buffers(&options, data, path);
+    DEBUG("loaded buffers");
+
+    // -- Load materials.
+    // Each mesh will be handed a material
+    TRACE("Num materials %d", data->materials_count);
+    out_model->num_materials = data->materials_count;
+
+    for (int m = 0; m < data->materials_count; m++) {
+      cgltf_material gltf_material = data->materials[m];
+      bh_material our_material = {0};
+
+      str8 name = str8_copy(gltf_material.name);
+      printf("Material name %s\n", name.buf);
+      our_material.name = name;
+
+      cgltf_pbr_metallic_roughness pbr = gltf_material.pbr_metallic_roughness;
+      if (gltf_material.has_pbr_metallic_roughness) {
+        // we will use base color texture like blinn phong
+        cgltf_texture_view diff_tex = pbr.base_color_texture;
+        strcpy(our_material.diffuse_tex_path, diff_tex.texture->image->uri);
+      }
+
+      bh_material_darray_push(materials, our_material);
+    }
+
+    // -- Load animations.
+    TRACE("Num animations %d", data->animations_count);
+    out_model->num_animations = data->animations_count;
+    for (int anim_idx = 0; anim_idx < data->animations_count; anim_idx++) {
+      cgltf_animation animation = data->animations[anim_idx];
+      animation_clip our_animation = {0};
+
+      // loop through each channel (track)
+      for (int c = 0; c < animation.channels_count; c++) {
+        // each channel (track) has a target and a sampler
+        // for the time being we assume the target is the model itself
+        cgltf_animation_channel channel = animation.channels[c];
+        animation_track our_track = {0};
+        our_track.interpolation = interpolation_fn_from_gltf(channel.sampler->interpolation);
+        our_track.property = anim_prop_from_gltf(channel.target_path);
+
+        // get the actual data out via the "accessor"
+        // input will be the times
+
+        // Keyframe times
+        size_t n_frames = channel.sampler->input->count;
+        our_track.num_keyframes = n_frames;
+        f32 *times = malloc(sizeof(f32) * n_frames);
+        our_track.keyframe_times = times;
+        CASSERT_MSG(channel.sampler->input->component_type == cgltf_component_type_r_32f,
+                    "Expected animation sampler input component to be type f32 (keyframe times)");
+        cgltf_accessor_unpack_floats(channel.sampler->input, times, channel.sampler->input->count);
+
+        // printf("keyframe times[\n");
+        // for (int i = 0; i < n_frames; i++) {
+        //   printf("  %f\n", times[i]);
+        // }
+        // printf("]\n");
+
+        // Data!
+        if (channel.target_path == cgltf_animation_path_type_rotation) {
+          CASSERT(channel.sampler->output->component_type == cgltf_component_type_r_32f);
+          CASSERT(channel.sampler->output->type == cgltf_type_vec4);
+        }
+
+        our_track.keyframes = malloc(sizeof(keyframe_data) * n_frames);
+        for (cgltf_size v = 0; v < channel.sampler->output->count; ++v) {
+          quat rot;
+          cgltf_accessor_read_float(channel.sampler->output, v, &rot.x, 4);
+          // vectors[v] = rot;
+          // printf("Quat %f %f %f %f\n", rot.x, rot.y, rot.z, rot.w);
+          our_track.keyframes[v].rotation = rot;
+        }
+
+        our_track.min_time = channel.sampler->input->min[0];
+        our_track.max_time = channel.sampler->input->max[0];
+
+        // printf("min time: %f max time %f\n", our_track.min_time, our_track.max_time);
+
+        animation_track_darray_push(&our_animation.tracks, our_track);
+      }
+
+      out_model->animations[anim_idx] = our_animation;
+    }
+
+    // Load meshes
+    TRACE("Num meshes %d", data->meshes_count);
+    out_model->num_meshes = data->meshes_count;
+
+    for (int m = 0; m < data->meshes_count; m++) {
+      // at the moment we only handle one primitives per mesh
+      // CASSERT(data->meshes[m].primitives_count == 1);
+
+      // Load vertex data from FIRST primitive only
+      cgltf_primitive primitive = data->meshes[m].primitives[0];
+      DEBUG("Found %d attributes", primitive.attributes_count);
+      for (int a = 0; a < data->meshes[m].primitives[0].attributes_count; a++) {
+        cgltf_attribute attribute = data->meshes[m].primitives[0].attributes[a];
+        if (attribute.type == cgltf_attribute_type_position) {
+          TRACE("Load positions from accessor");
+
+          cgltf_accessor *accessor = attribute.data;
+          CASSERT(accessor->component_type == cgltf_component_type_r_32f);
+          CASSERT_MSG(accessor->type == cgltf_type_vec3, "Vertex positions should be a vec3");
+
+          for (cgltf_size v = 0; v < accessor->count; ++v) {
+            vec3 pos;
+            cgltf_accessor_read_float(accessor, v, &pos.x, 3);
+            kitc_darray_push(tmp_positions, &pos);
+          }
+
+        } else if (attribute.type == cgltf_attribute_type_normal) {
+          TRACE("Load normals from accessor");
+
+          cgltf_accessor *accessor = attribute.data;
+          CASSERT(accessor->component_type == cgltf_component_type_r_32f);
+          CASSERT_MSG(accessor->type == cgltf_type_vec3, "Normal vectors should be a vec3");
+
+          for (cgltf_size v = 0; v < accessor->count; ++v) {
+            vec3 pos;
+            cgltf_accessor_read_float(accessor, v, &pos.x, 3);
+            kitc_darray_push(tmp_normals, &pos);
+          }
+
+        } else if (attribute.type == cgltf_attribute_type_texcoord) {
+          TRACE("Load texture coordinates from accessor");
+          cgltf_accessor *accessor = attribute.data;
+          CASSERT(accessor->component_type == cgltf_component_type_r_32f);
+          CASSERT_MSG(accessor->type == cgltf_type_vec2, "Texture coordinates should be a vec2");
+
+          for (cgltf_size v = 0; v < accessor->count; ++v) {
+            vec2 tex;
+            bool success = cgltf_accessor_read_float(accessor, v, &tex.x, 2);
+            if (!success) {
+              ERROR("Error loading tex coord");
+            }
+            kitc_darray_push(tmp_uvs, &tex);
+          }
+        } else if (attribute.type == cgltf_attribute_type_joints) {
+          // handle joints
+
+        } else {
+          WARN("Unhandled cgltf_attribute_type: %s. skipping..", attribute.name);
+        }
+      }
+
+      // Create mesh
+      mesh mesh;
+      mesh.vertices =
+          kitc_darray_new(sizeof(mesh_vertex), data->meshes[m].primitives[0].attributes_count);
+
+      // Flatten faces from indices if present otherwise push vertices verbatim
+      cgltf_accessor *indices = primitive.indices;
+      if (primitive.indices > 0) {
+        mesh.has_indices = true;
+
+        kitc_darray *element_indexes = kitc_darray_new(sizeof(cgltf_uint), indices->count);
+        TRACE("Indices count %ld\n", indices->count);
+        for (cgltf_size i = 0; i < indices->count; ++i) {
+          cgltf_uint ei;
+          cgltf_accessor_read_uint(indices, i, &ei, 1);
+          kitc_darray_push(element_indexes, &ei);
+        }
+
+        kitc_darray_iter indices_iter = kitc_darray_iter_new(element_indexes);
+        cgltf_uint *cur;
+        while ((cur = kitc_darray_iter_next(&indices_iter))) {
+          mesh_vertex vert;
+          memcpy(&vert.position, &((vec3 *)tmp_positions->data)[*cur], sizeof(vec3));
+          memcpy(&vert.normal, &((vec3 *)tmp_normals->data)[*cur], sizeof(vec3));
+          memcpy(&vert.tex_coord, &((vec2 *)tmp_uvs->data)[*cur], sizeof(vec2));
+          kitc_darray_push(mesh.vertices, &vert);
+          // mesh_vertex_debug_print(vert);
+        }
+        // printf("indices: %ld, positions: %ld\n", kitc_darray_len(element_indexes),
+        kitc_darray_free(element_indexes);
+      } else {
+        mesh.has_indices = false;
+
+        bool calc_normals = false;
+        if (kitc_darray_len(tmp_normals) == 0) {
+          TRACE("No normals data is present. Normals will be calculated for you.");
+          calc_normals = true;
+        }
+        for (int v = 0; v < kitc_darray_len(tmp_positions); v++) {
+          mesh_vertex vert;
+          memcpy(&vert.position, &((vec3 *)tmp_positions->data)[v], sizeof(vec3));
+          if (!calc_normals) {
+            memcpy(&vert.normal, &((vec3 *)tmp_normals->data)[v], sizeof(vec3));
+          }
+          memcpy(&vert.tex_coord, &((vec2 *)tmp_uvs->data)[v], sizeof(vec2));
+          kitc_darray_push(mesh.vertices, &vert);
+        }
+
+        if (calc_normals) {
+          if (mesh.has_indices) {
+            // generate_normals_nonindexed(mesh.vertices);
+          } else {
+            generate_normals_nonindexed(mesh.vertices);
+          }
+        }
+      }
+
+      // Material
+      if (primitive.material != NULL) {
+        for (int i = 0; i < bh_material_darray_len(materials); i++) {
+          if (strcmp(primitive.material->name, cstr(materials->data->name))) {
+            TRACE("Found material");
+            mesh.material_index = i;
+            break;
+          }
+        }
+      }
+
+      // mesh.material_index = 0;  // TODO: make sure DEFAULT_MATERIAL is added at material index 0
+      // TODO: material handling
+      mesh.material_index = bh_material_darray_len(materials) - 1;
+
+      calc_mesh_bounding_box(&mesh);
+      // out_model->meshes.data[m] = mesh;
+      mesh_darray_push(&out_model->meshes, mesh);
+
+      kitc_darray_clear(tmp_positions);
+      kitc_darray_clear(tmp_normals);
+      kitc_darray_clear(tmp_uvs);
+    }
+    // End Load meshes
+
+    // Load animations
+    DEBUG("Num animations %d", data->animations_count);
+    out_model->num_animations = data->animations_count;
+
+    // End Load animations
+
+    cgltf_free(data);
+  } else {
+    ERROR("Load failed");
+    kitc_darray_free(tmp_positions);
+    kitc_darray_free(tmp_normals);
+    kitc_darray_free(tmp_uvs);
+    return false;
+  }
+
+  for (int i = 0; i < materials->len; i++) {
+    out_model->materials[i] = materials->data[i];
+  }
+
+  calc_model_bounding_box(out_model);
+
+  DEBUG("Num meshes %d", out_model->num_meshes);
+  DEBUG("Num materials %d", out_model->num_materials);
+  DEBUG("Num animations %d", out_model->num_animations);
+
+  CASSERT(out_model->num_materials == 1);
+
+  kitc_darray_free(tmp_positions);
+  kitc_darray_free(tmp_normals);
+  kitc_darray_free(tmp_uvs);
+  bh_material_darray_free(materials);
+
+  TRACE("Finished loading GLTF");
+  return true;
+}
+*/
\ No newline at end of file