struct LightParams
{
	uniform vec3 ambient;
	uniform vec3 color;
	uniform float intensity;
	uniform vec3 dir;
};
uniform LightParams light;
uniform vec3 material_color;
uniform mat4 mvp;
uniform vec3 offset;
uniform sampler2D occlusion_map;

#pragma MSP stage(vertex)
layout(location=0) in vec4 position;
layout(location=1) in vec3 normal;
layout(location=2) in vec2 texcoord;
void main()
{
	vec4 p = position+vec4(offset, 1.0);
	gl_Position = mvp*p;
	passthrough;
}

#pragma MSP stage(fragment)
layout(location=0) out vec4 frag_color;
void main()
{
	float occlusion = float(texture(occlusion_map, texcoord));
	vec3 light_color = light.color*light.intensity;
	vec3 l = light.ambient+light_color*max(dot(light.dir, normalize(normal)), 0.0);
	frag_color = vec4(material_color*l*occlusion, 1.0);
}

/* Expected output: vertex
uniform mat4 mvp;
uniform vec3 offset;
layout(location=0) in vec4 position;
layout(location=1) in vec3 normal;
layout(location=2) in vec2 texcoord;
out vec3 _vs_out_normal;
out vec2 _vs_out_texcoord;
void main()
{
	gl_Position = mvp*(position+vec4(offset, 1.0));
	_vs_out_normal = normal;
	_vs_out_texcoord = texcoord;
}
*/

/* Expected output: fragment
struct LightParams
{
  uniform vec3 ambient;
  uniform vec3 color;
  uniform float intensity;
  uniform vec3 dir;
};
uniform LightParams light;
uniform vec3 material_color;
uniform sampler2D occlusion_map;
layout(location=0) out vec4 frag_color;
in vec2 _vs_out_texcoord;
in vec3 _vs_out_normal;
void main()
{
	frag_color = vec4(material_color*(light.ambient+light.color*light.intensity*max(dot(light.dir, normalize(_vs_out_normal)), 0.0))*float(texture(occlusion_map, _vs_out_texcoord)), 1.0);
}
*/