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#version 450
layout(std140, set = 0, binding = 0) uniform cbuffer {
mat4 ProjectionMatrix;
};
layout(location = 0) in vec4 vertex;
layout(location = 5) in mat4 instanceModelMatrix;
layout(location = 9) in vec4 instancePackedValues; // vec2 (offset), vec2 (scale)
layout(location = 10) in vec4 instanceColour;
layout(location = 0) out vec2 uv;
layout(location = 1) out vec4 colour;
void main()
{
// unpack inputs
#define transformationMatrix instanceModelMatrix
vec2 tuv_offset = instancePackedValues.xy;
vec2 tuv_scale = instancePackedValues.zw;
gl_Position = ProjectionMatrix * transformationMatrix * vertex;
uv = tuv_scale * vertex.xy + tuv_offset;
gl_Position.y *= -1.;
gl_Position.z = (gl_Position.z + gl_Position.w) / 2.0;
// pack outputs for fragment shader
colour = instanceColour;
}
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