Add input bindings for bone indices and weights

gpu.c

@@ -501,6 +501,18 @@ void gpu_init(gpu_ctx_t *ctx, const gpu_config_t *config, model_t model)
 		    .format = VK_FORMAT_R32G32B32_SFLOAT,
 		    .offset = offsetof(vertex_t, normal),
 		},
+		{
+		    .binding = 0,
+		    .location = 2,
+		    .format = VK_FORMAT_R16G16B16A16_UINT,
+		    .offset = offsetof(vertex_t, bones),
+		},
+		{
+		    .binding = 0,
+		    .location = 3,
+		    .format = VK_FORMAT_R32G32B32A32_SFLOAT,
+		    .offset = offsetof(vertex_t, weights),
+		},
 	};
 	const VkPipelineVertexInputStateCreateInfo vertex_input_config = {
 		.sType = VK_STRUCTURE_TYPE_PIPELINE_VERTEX_INPUT_STATE_CREATE_INFO,

vert.glsl

@@ -2,6 +2,8 @@
 
 layout(location = 0) in vec3 position;
 layout(location = 1) in vec3 normal;
+layout(location = 2) in uvec4 bone_indices;
+layout(location = 3) in vec4 weights;
 
 layout(location = 0) out vec3 frag_normal;