initial commit

shaders/mesh/vertex_face.glsl

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+layout (location = 0) uniform mat4 mvp_matrix;
+layout (location = 0) in vec3 vertex_position;
+
+#ifdef LIGHTING
+layout (location = 1) uniform mat4 model_matrix;
+layout (location = 1) in vec3 vertex_normal;
+layout (location = 0) out vec3 frag_position;
+layout (location = 1) out vec3 frag_normal;
+#endif
+
+#ifdef TEXTURE
+layout (location = 2) in vec2 vertex_tex_coord;
+layout (location = 2) out vec2 frag_tex_coord;
+#endif
+
+void main() {
+    gl_Position = mvp_matrix * vec4(vertex_position, 1.0);
+
+#ifdef LIGHTING
+    frag_position = (model_matrix * vec4(vertex_position, 1.0)).xyz;
+    frag_normal = normalize(mat3(model_matrix) * vertex_normal);
+#endif
+
+#ifdef TEXTURE
+    frag_tex_coord = vertex_tex_coord;
+#endif
+}