<@include gpu/Config.slh@>
<$VERSION_HEADER$>
//  Generated on <$_SCRIBE_DATE$>
//
//  deferred_light.vert
//  vertex shader
//
//  Created by Sam Gateau on 6/16/16.
//  Copyright 2014 High Fidelity, Inc.
//
//  Distributed under the Apache License, Version 2.0.
//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
//

<@include render-utils/ShaderConstants.h@>

layout(location=RENDER_UTILS_ATTR_TEXCOORD01) out vec4 _texCoord01;

void main(void) {
    const float depth = 1.0;
    const mat4 UNIT_QUAD = mat4(
        vec4(-1.0, -1.0, depth, 1.0),
        vec4(1.0, -1.0, depth, 1.0),
        vec4(-1.0, 1.0, depth, 1.0),
        vec4(1.0, 1.0, depth, 1.0)
    );
    vec4 pos = UNIT_QUAD[gl_VertexID];

    _texCoord01 = vec4((pos.xy + 1.0) * 0.5, 0.0, 0.0);

    gl_Position = pos;
}