Add initial GLTF support

2 files changed, 29 insertions, 0 deletions

diff --git a/src/assets/shaders/scene/frag.glsl b/src/assets/shaders/scene/frag.glsl
new file mode 100644
index 0000000..81e08b9
--- /dev/null
+++ b/src/assets/shaders/scene/frag.glsl
@@ -0,0 +1,11 @@
+uniform sampler2D texture_data;
+
+void main()
+{
+    vec4 texel = texture(texture_data, vertex_texcoord);
+    if (texel.a != 1.0) {
+        discard;
+    }
+
+    frag_color = vec4(texel.rgb, texel.a);
+} 
diff --git a/src/assets/shaders/scene/vert.glsl b/src/assets/shaders/scene/vert.glsl
new file mode 100644
index 0000000..64f400c
--- /dev/null
+++ b/src/assets/shaders/scene/vert.glsl
@@ -0,0 +1,18 @@
+in vec4 joint;
+in vec4 weight;
+
+uniform mat4 joint_matrices[128];
+
+void main()
+{
+    vertex_texcoord = texcoord;
+    vertex_normal = (normal_matrix * vec4(normal, 1.0)).xyz;
+    mat4 skin
+        = weight.x * joint_matrices[int(joint.x)]
+        + weight.y * joint_matrices[int(joint.y)]
+        + weight.z * joint_matrices[int(joint.z)]
+        + weight.w * joint_matrices[int(joint.w)];
+    vec3 pos = (position * skin * vec4(vertex, 1.0)).xyz;
+    vertex_view_vector = camera_pos - pos;
+    gl_Position = projection * view * vec4(pos, 1.0);
+}