#version 430 core
layout(location = 0) in vec3 aPos;
layout(location = 1) in vec3 aColor;

// Campaign V slice V6d: the separate uView/uProjection pair converged into the
// pinned GpuPushConstants block's single uViewProjection. Vulkan has no default
// uniform block, so a loose uniform cannot exist there at all — a shader either
// reads a field of the shared push-constant block or it cannot be expressed.
//
// The product now happens once on the CPU (DebugLineRenderer.Flush) instead of
// once per vertex, so the rounding differs in the last bits. That is why this
// convergence is measured on its own: these lines are diagnostic-only geometry,
// drawn only when collision wireframes are switched on, so the offline gate
// reads nothing but its own ambient noise.
uniform mat4 uViewProjection;

out vec3 vColor;

void main() {
    vColor = aColor;
    gl_Position = uViewProjection * vec4(aPos, 1.0);
}