shader/sprite_vtx.glsl

#version 400 core

layout(location = 0) in vec2 position;
out vec2 texcoord;

uniform mat4 projection;
uniform mat4 model;
uniform float depth;

void main(void) {
    vec4 pos = projection*model*vec4(position.x, position.y, 0, 1.0);
    // apply depth
    pos.z = depth / -1024.0;
    gl_Position = pos;
    texcoord = vec2(model[0].x, model[1].y)*position;
}