#pragma MSP stage(vertex)
uniform mat4 mvp;
uniform sampler2D heightmap;
layout(location=0) in vec2 position;
layout(location=1) in vec2 texcoord;
void main()
{
	gl_Position = mvp*vec4(position, texture(heightmap, texcoord).r, 1.0);
	passthrough;
}

#pragma MSP stage(fragment)
layout(location=0) uniform sampler2D heightmap;
uniform vec4 color;
out vec4 frag_color;
void main()
{
	frag_color = color*vec4(texture(heightmap, texcoord).rrr, 1.0);
}

/* Expected output: vertex
layout(location=1) uniform mat4 mvp;
layout(location=0) uniform sampler2D heightmap;
layout(location=0) in vec2 position;
layout(location=1) in vec2 texcoord;
layout(location=0) out vec2 _vs_out_texcoord;
void main()
{
  gl_Position = mvp*vec4(position, texture(heightmap, texcoord).r, 1.0);
  _vs_out_texcoord = texcoord;
}
*/

/* Expected output: fragment
layout(location=0) uniform sampler2D heightmap;
layout(location=5) uniform vec4 color;
layout(location=0) out vec4 frag_color;
layout(location=0) in vec2 _vs_out_texcoord;
void main()
{
  frag_color = color*vec4(texture(heightmap, _vs_out_texcoord).rrr, 1.0);
}
*/