<@include gpu/Config.slh@>
<$VERSION_HEADER$>
//  Generated on <$_SCRIBE_DATE$>
//
//  paintStroke.frag
//  fragment shader
//
//  Created by Eric Levin on 8/10/2015
//  Copyright 2015 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 DeferredBufferWrite.slh@>

<@include paintStroke.slh@>
<$declarePolyLineBuffers()$>

LAYOUT(binding=0) uniform sampler2D _texture;

layout(location=0) in vec3 _normalWS;
layout(location=1) in vec2 _texCoord;
layout(location=2) in vec4 _color;
layout(location=3) in float _distanceFromCenter;

void main(void) {
    vec4 texel = texture(_texture, _texCoord);
    int frontCondition = 1 - 2 * int(gl_FrontFacing);
    vec3 color = _color.rgb * texel.rgb;
    float alpha = texel.a * _color.a;

    alpha *= mix(1.0, pow(1.0 - abs(_distanceFromCenter), 10.0), _polylineData.faceCameraGlow.y);

    packDeferredFragmentTranslucent(
        float(frontCondition) * _normalWS,
        alpha,
        color,
        DEFAULT_ROUGHNESS);
}