layout (location = 0) in vec2 pos;

flat out vec2 startPos;
out vec2 vertPos;

uniform mat4 viewMatrix;

void main()
{
    vec4 outPos = viewMatrix * vec4(pos.x, pos.y, 0.0, 1.0);
    gl_Position = outPos;
    vertPos = pos.xy / outPos.w;
    startPos = vertPos;
}