overte-HifiExperiments/libraries/render-utils/src/grid.slf

<@include gpu/Config.slh@>
<$VERSION_HEADER$>
//  <$_SCRIBE_FILENAME$>
//  Generated on <$_SCRIBE_DATE$>
//
//  Created by Zach Pomerantz on 2/16/2016.
//  Copyright 2016 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 gpu/ShaderConstants.h@>
<@include gpu/Paint.slh@>

<@if not HIFI_USE_FORWARD@>
    <@include DeferredBufferWrite.slh@>
<@else@>
    layout(location=0) out vec4 _fragColor0;
<@endif@>

struct Grid {
    vec4 period;
    vec4 offset;
    vec4 edge;
};

LAYOUT(binding=0) uniform gridBuffer {
  Grid grid;
};

layout(location=GPU_ATTR_TEXCOORD0) in vec2 varTexCoord0;
layout(location=GPU_ATTR_COLOR) in vec4 varColor;

void main(void) {
    float gridLine = mix(paintGridMajorMinor(varTexCoord0, grid.offset, grid.period, grid.edge),
                      paintGrid(varTexCoord0, grid.offset.xy, grid.period.xy, grid.edge.xy),
                      float(grid.edge.z == 0.0));
    if (gridLine <= 0.0) {
        discard;
    }

<@if not HIFI_USE_FORWARD@>
    vec3 NORMAL = vec3(1.0, 0.0, 0.0);
    <@if not HIFI_USE_TRANSLUCENT@>
        packDeferredFragmentUnlit(NORMAL, 1.0, varColor.rgb);
    <@else@>
        packDeferredFragmentTranslucent(NORMAL, varColor.a, varColor.rgb, DEFAULT_ROUGHNESS);
    <@endif@>
<@else@>
    _fragColor0 = varColor;
<@endif@>
}