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

<@include gpu/Config.slh@>
<$VERSION_HEADER$>
//  Generated on <$_SCRIBE_DATE$>
//
//  directional_ambient_light.frag
//  fragment shader
//
//  Created by Andrzej Kapolka on 9/3/14.
//  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 DeferredBufferRead.slh@>
<@include DeferredGlobalLight.slh@>

<$declareEvalLightmappedColor()$>

<$declareEvalAmbientSphereGlobalColor(supportScattering)$>


in vec2 _texCoord0;
out vec4 _fragColor;

void main(void) {
    DeferredFrameTransform deferredTransform = getDeferredFrameTransform();
    DeferredFragment frag = unpackDeferredFragment(deferredTransform, _texCoord0);

    float shadowAttenuation = 1.0;

    if (frag.mode == FRAG_MODE_UNLIT) {
        discard;
    } else if (frag.mode == FRAG_MODE_LIGHTMAPPED) {
        discard;
    } else {
        vec4 midNormalCurvature;
        vec4 lowNormalCurvature;
        if (frag.mode == FRAG_MODE_SCATTERING) {
            unpackMidLowNormalCurvature(_texCoord0, midNormalCurvature, lowNormalCurvature);
        }

        vec3 color = evalAmbientSphereGlobalColor(
            getViewInverse(),
            shadowAttenuation,
            frag.obscurance,
            frag.position.xyz,
            frag.normal,
            frag.albedo,
            frag.fresnel,
            frag.metallic,
            frag.roughness,
            frag.scattering,
            midNormalCurvature,
            lowNormalCurvature);
        _fragColor = vec4(color, 1.0);

    }
}