#version 460
// Transforms model vertices by the MVP push constant. The model-space position
// is passed through so the fragment shader can derive a flat normal from it.

layout(location = 0) in vec3 inPos;

layout(push_constant) uniform PC {
    mat4 mvp;
    vec4 color;   // .rgb base colour, .a = lit flag (1 = shaded, 0 = flat)
} pc;

layout(location = 0) out vec3 vModelPos;

void main() {
    vModelPos   = inPos;
    gl_Position = pc.mvp * vec4(inPos, 1.0);
}