Merged from 21274

libraries/render-utils/src/Fade.slh

@@ -0,0 +1,66 @@
+//  Generated on <$_SCRIBE_DATE$>
+//
+//  Created by Olivier Prat on 04/12/17.
+//  Copyright 2017 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
+//
+<@if not FADE_SLH@>
+<@def FADE_SLH@>
+
+<@func transformModelToFadePos(objectTransform, objectPosition, fadePosition)@>
+    {
+        <$transformModelToWorldPos($objectTransform$, $objectPosition$, $fadePosition$)$>
+        <$fadePosition$> -= vec4(<$objectTransform$>._model[3].xyz, 0.f);
+    }
+<@endfunc@>
+
+<@func declareFadeFragment()@>
+
+struct Fade {
+    vec3 _Offset;
+    float  _Percent;
+};
+
+uniform fadeBuffer {
+    Fade fade;
+};
+
+uniform sampler2D fadeMaskMap;
+
+vec2 hash2D(vec3 position) {
+    return position.xy* vec2(0.1677,  0.221765) + position.z*0.561;
+}
+
+float evalFadeMask(vec3 position, vec3 normal) {
+    const float FADE_MASK_INV_SCALE = 1.0;
+
+    // Do tri-linear interpolation
+    vec3    noisePosition = position * FADE_MASK_INV_SCALE + fade._Offset;
+    vec3    noisePositionFloored = floor(noisePosition);
+    vec3    noisePositionFraction = fract(noisePosition);
+    float   noiseLowXLowYLowZ = textureLod(fadeMaskMap, hash2D(noisePositionFloored), 0).r;
+    float   noiseLowXHighYLowZ = textureLod(fadeMaskMap, hash2D(noisePositionFloored+vec3(0,1,0)), 0).r;
+    float   noiseHighXLowYLowZ = textureLod(fadeMaskMap, hash2D(noisePositionFloored+vec3(1,0,0)), 0).r;
+    float   noiseHighXHighYLowZ = textureLod(fadeMaskMap, hash2D(noisePositionFloored+vec3(1,1,0)), 0).r;
+    float   noiseLowXLowYHighZ = textureLod(fadeMaskMap, hash2D(noisePositionFloored+vec3(0,0,1)), 0).r;
+    float   noiseLowXHighYHighZ = textureLod(fadeMaskMap, hash2D(noisePositionFloored+vec3(0,1,1)), 0).r;
+    float   noiseHighXLowYHighZ = textureLod(fadeMaskMap, hash2D(noisePositionFloored+vec3(1,0,1)), 0).r;
+    float   noiseHighXHighYHighZ = textureLod(fadeMaskMap, hash2D(noisePositionFloored+vec3(1,1,1)), 0).r;
+    vec4    maskLowZ = vec4(noiseLowXLowYLowZ, noiseLowXHighYLowZ, noiseHighXLowYLowZ, noiseHighXHighYLowZ);
+    vec4    maskHighZ = vec4(noiseLowXLowYHighZ, noiseLowXHighYHighZ, noiseHighXLowYHighZ, noiseHighXHighYHighZ);
+    vec4    maskXY = mix(maskLowZ, maskHighZ, noisePositionFraction.z);
+    vec2    maskY = mix(maskXY.xy, maskXY.zw, noisePositionFraction.x);
+
+    return mix(maskY.x, maskY.y, noisePositionFraction.y);
+}
+
+void applyFade(vec3 position, vec3 normal) {
+    if (evalFadeMask(position, normal) < fade._Percent) {
+        discard;
+    }
+}
+<@endfunc@>
+
+<@endif@>

libraries/render-utils/src/MeshPartPayload.cpp

@@ -320,13 +320,23 @@ template <> void payloadRender(const ModelMeshPartPayload::Pointer& payload, Ren
 }
 }
 
+struct ModelMeshPartPayload::Fade
+{
+    glm::vec3 _offset;  // The noise offset
+    float _percent;     // The fade percent
+};
+
 ModelMeshPartPayload::ModelMeshPartPayload(ModelPointer model, int _meshIndex, int partIndex, int shapeIndex, const Transform& transform, const Transform& offsetTransform) :
     _meshIndex(_meshIndex),
     _shapeID(shapeIndex) {
 
+    Fade fade;
+    _fadeBuffer = gpu::BufferView(std::make_shared<gpu::Buffer>(sizeof(Fade), (const gpu::Byte*) &fade));
+
     assert(model && model->isLoaded());
     _model = model;
     auto& modelMesh = model->getGeometry()->getMeshes().at(_meshIndex);
+
     updateMeshPart(modelMesh, partIndex);
 
     updateTransform(transform, offsetTransform);
@@ -465,7 +475,7 @@ ShapeKey ModelMeshPartPayload::getShapeKey() const {
     ShapeKey::Builder builder;
     builder.withMaterial();
 
-    if (isTranslucent || _fadeState != FADE_COMPLETE) {
+    if (isTranslucent) {
         builder.withTranslucent();
     }
     if (hasTangents) {
@@ -486,6 +496,9 @@ ShapeKey ModelMeshPartPayload::getShapeKey() const {
     if (wireframe) {
         builder.withWireframe();
     }
+    if (_fadeState != FADE_COMPLETE) {
+        builder.withFade();
+    }
     return builder.build();
 }
 
@@ -509,12 +522,6 @@ void ModelMeshPartPayload::bindMesh(gpu::Batch& batch) {
             batch.setInputStream(0, _drawMesh->getVertexStream());
         }
     }
-
-    if (_fadeState != FADE_COMPLETE) {
-        batch._glColor4f(1.0f, 1.0f, 1.0f, computeFadeAlpha());
-    } else if (!_hasColorAttrib) {
-        batch._glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
-    }
 }
 
 void ModelMeshPartPayload::bindTransform(gpu::Batch& batch, const ShapePipeline::LocationsPointer locations, RenderArgs::RenderMode renderMode) const {
@@ -525,12 +532,12 @@ void ModelMeshPartPayload::bindTransform(gpu::Batch& batch, const ShapePipeline:
     batch.setModelTransform(_transform);
 }
 
-float ModelMeshPartPayload::computeFadeAlpha() {
+float ModelMeshPartPayload::computeFadePercent() const {
     if (_fadeState == FADE_WAITING_TO_START) {
         return 0.0f;
     }
     float fadeAlpha = 1.0f;
-    const float INV_FADE_PERIOD = 1.0f / (float)(1 * USECS_PER_SECOND);
+    const float INV_FADE_PERIOD = 1.0f / (float)(3 * USECS_PER_SECOND);
     float fraction = (float)(usecTimestampNow() - _fadeStartTime) * INV_FADE_PERIOD;
     if (fraction < 1.0f) {
         fadeAlpha = Interpolate::simpleNonLinearBlend(fraction);
@@ -547,6 +554,26 @@ float ModelMeshPartPayload::computeFadeAlpha() {
     return Interpolate::simpleNonLinearBlend(fadeAlpha);
 }
 
+void ModelMeshPartPayload::bindFade(gpu::Batch& batch, const RenderArgs* args) const {
+    const bool isDebugEnabled = (args->_debugFlags & RenderArgs::RENDER_DEBUG_FADE) != 0;
+
+    if (_fadeState != FADE_COMPLETE || isDebugEnabled) {
+        auto& fade = _fadeBuffer.edit<Fade>();
+        glm::vec3 offset = _transform.getTranslation();
+
+        // A bit ugly to have the test at every bind...
+        if (!isDebugEnabled) {
+            fade._percent = computeFadePercent();
+        }
+        else {
+            fade._percent = args->_debugFadePercent;
+        }
+
+        fade._offset = offset;
+        batch.setUniformBuffer(ShapePipeline::Slot::BUFFER::FADE, _fadeBuffer);
+    }
+}
+
 void ModelMeshPartPayload::render(RenderArgs* args) {
     PerformanceTimer perfTimer("ModelMeshPartPayload::render");
 
@@ -593,6 +620,9 @@ void ModelMeshPartPayload::render(RenderArgs* args) {
     // apply material properties
     bindMaterial(batch, locations, args->_enableTexturing);
 
+    // Apply fade effect
+    bindFade(batch, args);
+
     args->_details._materialSwitches++;
 
     // Draw!

libraries/render-utils/src/MeshPartPayload.h

@@ -95,7 +95,7 @@ public:
             const Transform& boundTransform,
             const gpu::BufferPointer& buffer);
 
-    float computeFadeAlpha();
+    float computeFadePercent() const;
 
     // Render Item interface
     render::ItemKey getKey() const override;
@@ -106,6 +106,7 @@ public:
     // ModelMeshPartPayload functions to perform render
     void bindMesh(gpu::Batch& batch) override;
     void bindTransform(gpu::Batch& batch, const render::ShapePipeline::LocationsPointer locations, RenderArgs::RenderMode renderMode) const override;
+    void bindFade(gpu::Batch& batch, const RenderArgs* args) const;
 
     void initCache();
 
@@ -122,8 +123,13 @@ public:
     bool _materialNeedsUpdate { true };
 
 private:
-    quint64 _fadeStartTime { 0 };
-    uint8_t _fadeState { FADE_WAITING_TO_START };
+
+    struct Fade;
+
+    mutable gpu::BufferView _fadeBuffer;
+    mutable quint64 _fadeStartTime { 0 };
+    mutable uint8_t _fadeState { FADE_WAITING_TO_START };
+
 };
 
 namespace render {

libraries/render-utils/src/RenderDeferredTask.cpp

@@ -85,9 +85,13 @@ void RenderDeferredTask::build(JobModel& task, const render::Varying& input, ren
     const auto deferredFramebuffer = prepareDeferredOutputs.getN<PrepareDeferred::Outputs>(0);
     const auto lightingFramebuffer = prepareDeferredOutputs.getN<PrepareDeferred::Outputs>(1);
 
+    // Fade texture mask
+    auto texturePath = PathUtils::resourcesPath() + "images/fadeMask.png";
+    auto fadeMaskMap = DependencyManager::get<TextureCache>()->getImageTexture(texturePath, image::TextureUsage::STRICT_TEXTURE);
+
     // Render opaque objects in DeferredBuffer
     const auto opaqueInputs = DrawStateSortDeferred::Inputs(opaques, lightingModel).hasVarying();
-    task.addJob<DrawStateSortDeferred>("DrawOpaqueDeferred", opaqueInputs, shapePlumber);
+    task.addJob<DrawStateSortDeferred>("DrawOpaqueDeferred", opaqueInputs, shapePlumber, fadeMaskMap);
 
     // Once opaque is all rendered create stencil background
     task.addJob<DrawStencilDeferred>("DrawOpaqueStencil", deferredFramebuffer);
@@ -313,11 +317,22 @@ void DrawStateSortDeferred::run(const RenderContextPointer& renderContext, const
         // Setup lighting model for all items;
         batch.setUniformBuffer(render::ShapePipeline::Slot::LIGHTING_MODEL, lightingModel->getParametersBuffer());
 
-        // From the lighting model define a global shapKey ORED with individiual keys
+        // From the lighting model define a global shapeKey ORED with individiual keys
         ShapeKey::Builder keyBuilder;
         if (lightingModel->isWireframeEnabled()) {
             keyBuilder.withWireframe();
         }
+
+        // Prepare fade effect
+        batch.setResourceTexture(ShapePipeline::Slot::MAP::FADE_MASK, _fadeMaskMap);
+        if (_debugFade) {
+            args->_debugFlags = static_cast<RenderArgs::DebugFlags>(args->_debugFlags |
+                static_cast<int>(RenderArgs::RENDER_DEBUG_FADE));
+            args->_debugFadePercent = _debugFadePercent;
+            // Force fade for everyone
+            keyBuilder.withFade();
+        }
+
         ShapeKey globalKey = keyBuilder.build();
         args->_globalShapeKey = globalKey._flags.to_ulong();
 
@@ -328,6 +343,13 @@ void DrawStateSortDeferred::run(const RenderContextPointer& renderContext, const
         }
         args->_batch = nullptr;
         args->_globalShapeKey = 0;
+
+        // Not sure this is really needed...
+        if (_debugFade) {
+            // Turn off fade debug
+            args->_debugFlags = static_cast<RenderArgs::DebugFlags>(args->_debugFlags &
+                ~static_cast<int>(RenderArgs::RENDER_DEBUG_FADE));
+        }
     });
 
     config->setNumDrawn((int)inItems.size());

libraries/render-utils/src/RenderDeferredTask.h

@@ -86,13 +86,17 @@ class DrawStateSortConfig : public render::Job::Config {
         Q_PROPERTY(int numDrawn READ getNumDrawn NOTIFY numDrawnChanged)
         Q_PROPERTY(int maxDrawn MEMBER maxDrawn NOTIFY dirty)
         Q_PROPERTY(bool stateSort MEMBER stateSort NOTIFY dirty)
+        Q_PROPERTY(bool debugFade MEMBER debugFade NOTIFY dirty)
+        Q_PROPERTY(float debugFadePercent MEMBER debugFadePercent NOTIFY dirty)
 public:
 
     int getNumDrawn() { return numDrawn; }
     void setNumDrawn(int num) { numDrawn = num; emit numDrawnChanged(); }
 
     int maxDrawn{ -1 };
+    float debugFadePercent{ 0.f };
     bool stateSort{ true };
+    bool debugFade{ false };
 
 signals:
     void numDrawnChanged();
@@ -109,15 +113,18 @@ public:
     using Config = DrawStateSortConfig;
     using JobModel = render::Job::ModelI<DrawStateSortDeferred, Inputs, Config>;
 
-    DrawStateSortDeferred(render::ShapePlumberPointer shapePlumber) : _shapePlumber{ shapePlumber } {}
+    DrawStateSortDeferred(render::ShapePlumberPointer shapePlumber, gpu::TexturePointer fadeMaskMap) : _shapePlumber{ shapePlumber }, _fadeMaskMap{ fadeMaskMap } {}
 
-    void configure(const Config& config) { _maxDrawn = config.maxDrawn; _stateSort = config.stateSort; }
+    void configure(const Config& config) { _maxDrawn = config.maxDrawn; _stateSort = config.stateSort; _debugFadePercent = config.debugFadePercent; _debugFade = config.debugFade; }
     void run(const render::RenderContextPointer& renderContext, const Inputs& inputs);
 
 protected:
     render::ShapePlumberPointer _shapePlumber;
+    gpu::TexturePointer _fadeMaskMap;
     int _maxDrawn; // initialized by Config
+    float _debugFadePercent;
     bool _stateSort;
+    bool _debugFade;
 };
 
 class DeferredFramebuffer;

libraries/render-utils/src/RenderPipelines.cpp

@@ -41,6 +41,12 @@
 #include "model_normal_specular_map_frag.h"
 #include "model_specular_map_frag.h"
 
+#include "model_fade_vert.h"
+#include "model_normal_map_fade_vert.h"
+
+#include "model_fade_frag.h"
+#include "model_normal_map_fade_frag.h"
+
 #include "forward_model_frag.h"
 #include "forward_model_unlit_frag.h"
 #include "forward_model_normal_map_frag.h"
@@ -151,6 +157,10 @@ void initDeferredPipelines(render::ShapePlumber& plumber) {
     auto skinModelNormalMapVertex = gpu::Shader::createVertex(std::string(skin_model_normal_map_vert));
     auto skinModelShadowVertex = gpu::Shader::createVertex(std::string(skin_model_shadow_vert));
 
+    // Only models can have fade applied to them (?)
+    auto modelFadeVertex = gpu::Shader::createVertex(std::string(model_fade_vert));
+    auto modelNormalMapFadeVertex = gpu::Shader::createVertex(std::string(model_normal_map_fade_vert));
+
     // Pixel shaders
     auto simplePixel = gpu::Shader::createPixel(std::string(simple_textured_frag));
     auto simpleUnlitPixel = gpu::Shader::createPixel(std::string(simple_textured_unlit_frag));
@@ -169,6 +179,10 @@ void initDeferredPipelines(render::ShapePlumber& plumber) {
     auto modelLightmapSpecularMapPixel = gpu::Shader::createPixel(std::string(model_lightmap_specular_map_frag));
     auto modelLightmapNormalSpecularMapPixel = gpu::Shader::createPixel(std::string(model_lightmap_normal_specular_map_frag));
 
+    // Only models can have fade applied to them (?)
+    auto modelFadePixel = gpu::Shader::createPixel(std::string(model_fade_frag));
+    auto modelNormalMapFadePixel = gpu::Shader::createPixel(std::string(model_normal_map_fade_frag));
+
     using Key = render::ShapeKey;
     auto addPipeline = std::bind(&addPlumberPipeline, std::ref(plumber), _1, _2, _3);
     // TODO: Refactor this to use a filter
@@ -194,6 +208,14 @@ void initDeferredPipelines(render::ShapePlumber& plumber) {
     addPipeline(
         Key::Builder().withMaterial().withTangents().withSpecular(),
         modelNormalMapVertex, modelNormalSpecularMapPixel);
+    // Same thing but with Fade on
+    addPipeline(
+        Key::Builder().withMaterial().withFade(),
+        modelFadeVertex, modelFadePixel);
+    addPipeline(
+        Key::Builder().withMaterial().withTangents().withFade(),
+        modelNormalMapFadeVertex, modelNormalMapFadePixel);
+
     // Translucents
     addPipeline(
         Key::Builder().withMaterial().withTranslucent(),

libraries/render-utils/src/model_fade.slf

@@ -0,0 +1,65 @@
+<@include gpu/Config.slh@>
+<$VERSION_HEADER$>
+//  Generated on <$_SCRIBE_DATE$>
+//  model_fade.frag
+//  fragment shader
+//
+//  Created by Olivier Prat on 04/19/17.
+//  Copyright 2017 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 model/Material.slh@>
+
+<@include MaterialTextures.slh@>
+<$declareMaterialTextures(ALBEDO, ROUGHNESS, _SCRIBE_NULL, _SCRIBE_NULL, EMISSIVE, OCCLUSION)$>
+
+<@include Fade.slh@>
+<$declareFadeFragment()$>
+
+in vec4 _position;
+in vec4 _worldFadePosition;
+in vec3 _normal;
+in vec3 _color;
+in vec2 _texCoord0;
+in vec2 _texCoord1;
+
+
+void main(void) {
+    applyFade(_worldFadePosition.xyz, _normal);
+
+    Material mat = getMaterial();
+    int matKey = getMaterialKey(mat);
+    <$fetchMaterialTexturesCoord0(matKey, _texCoord0, albedoTex, roughnessTex, _SCRIBE_NULL, _SCRIBE_NULL, emissiveTex)$>
+    <$fetchMaterialTexturesCoord1(matKey, _texCoord1, occlusionTex)$>
+
+    float opacity = 1.0;
+    <$evalMaterialOpacity(albedoTex.a, opacity, matKey, opacity)$>;
+    <$discardTransparent(opacity)$>;
+
+    vec3 albedo = getMaterialAlbedo(mat);
+    <$evalMaterialAlbedo(albedoTex, albedo, matKey, albedo)$>;
+    albedo *= _color;
+
+    float roughness = getMaterialRoughness(mat);
+    <$evalMaterialRoughness(roughnessTex, roughness, matKey, roughness)$>;
+
+    vec3 emissive = getMaterialEmissive(mat);
+    <$evalMaterialEmissive(emissiveTex, emissive, matKey, emissive)$>;
+
+    float scattering = getMaterialScattering(mat);
+
+    packDeferredFragment(
+        normalize(_normal.xyz), 
+        opacity,
+        albedo,
+        roughness,
+        getMaterialMetallic(mat),
+        emissive,
+        occlusionTex,
+        scattering);
+}

libraries/render-utils/src/model_fade.slv

@@ -0,0 +1,46 @@
+<@include gpu/Config.slh@>
+<$VERSION_HEADER$>
+//  Generated on <$_SCRIBE_DATE$>
+//  model_fade.slv
+//  vertex shader
+//
+//  Created by Olivier Prat on 04/24/17.
+//  Copyright 2017 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/Inputs.slh@>
+<@include gpu/Color.slh@>
+<@include gpu/Transform.slh@>
+<$declareStandardTransform()$>
+
+<@include MaterialTextures.slh@>
+<$declareMaterialTexMapArrayBuffer()$>
+
+<@include Fade.slh@>
+
+out vec3 _color;
+out float _alpha;
+out vec2 _texCoord0;
+out vec2 _texCoord1;
+out vec4 _position;
+out vec4 _worldFadePosition;
+out vec3 _normal;
+
+void main(void) {
+    _color = colorToLinearRGB(inColor.xyz);
+    _alpha = inColor.w;
+
+    TexMapArray texMapArray = getTexMapArray();
+    <$evalTexMapArrayTexcoord0(texMapArray, inTexCoord0, _texCoord0)$>
+    <$evalTexMapArrayTexcoord1(texMapArray, inTexCoord0, _texCoord1)$>
+
+    // standard transform
+    TransformCamera cam = getTransformCamera();
+    TransformObject obj = getTransformObject();
+    <$transformModelToEyeAndClipPos(cam, obj, inPosition, _position, gl_Position)$>
+    <$transformModelToFadePos(obj, inPosition, _worldFadePosition)$>
+    <$transformModelToWorldDir(cam, obj, inNormal.xyz, _normal)$>
+}

libraries/render-utils/src/model_normal_map_fade.slf

@@ -0,0 +1,70 @@
+<@include gpu/Config.slh@>
+<$VERSION_HEADER$>
+//  Generated on <$_SCRIBE_DATE$>
+//
+//  model_normal_map_fade.frag
+//  fragment shader
+//
+//  Created by Olivier Prat on 04/19/17.
+//  Copyright 2017 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 model/Material.slh@>
+
+<@include MaterialTextures.slh@>
+<$declareMaterialTextures(ALBEDO, ROUGHNESS, NORMAL, _SCRIBE_NULL, EMISSIVE, OCCLUSION, SCATTERING)$>
+
+<@include Fade.slh@>
+<$declareFadeFragment()$>
+
+in vec4 _position;
+in vec4 _worldFadePosition;
+in vec2 _texCoord0;
+in vec2 _texCoord1;
+in vec3 _normal;
+in vec3 _tangent;
+in vec3 _color;
+
+void main(void) {
+    applyFade(_worldFadePosition.xyz, _normal);
+
+    Material mat = getMaterial();
+    int matKey = getMaterialKey(mat);
+    <$fetchMaterialTexturesCoord0(matKey, _texCoord0, albedoTex, roughnessTex, normalTex, _SCRIBE_NULL, emissiveTex, scatteringTex)$>
+    <$fetchMaterialTexturesCoord1(matKey, _texCoord1, occlusionTex)$>
+
+    float opacity = 1.0;
+    <$evalMaterialOpacity(albedoTex.a, opacity, matKey, opacity)$>;
+    <$discardTransparent(opacity)$>;
+
+    vec3 albedo = getMaterialAlbedo(mat);
+    <$evalMaterialAlbedo(albedoTex, albedo, matKey, albedo)$>;
+    albedo *= _color;
+
+    float roughness = getMaterialRoughness(mat);
+    <$evalMaterialRoughness(roughnessTex, roughness, matKey, roughness)$>;
+
+    vec3 emissive = getMaterialEmissive(mat);
+    <$evalMaterialEmissive(emissiveTex, emissive, matKey, emissive)$>;
+
+    vec3 viewNormal;
+   <$tangentToViewSpaceLOD(_position, normalTex, _normal, _tangent, viewNormal)$>
+
+    float scattering = getMaterialScattering(mat);
+    <$evalMaterialScattering(scatteringTex, scattering, matKey, scattering)$>;
+
+    packDeferredFragment(
+        viewNormal, 
+        opacity,
+        albedo,
+        roughness,
+        getMaterialMetallic(mat),
+        emissive,
+        occlusionTex,
+        scattering);
+}

libraries/render-utils/src/model_normal_map_fade.slv

@@ -0,0 +1,50 @@
+<@include gpu/Config.slh@>
+<$VERSION_HEADER$>
+//  Generated on <$_SCRIBE_DATE$>
+//
+//  model_normal_map_fade.vert
+//  vertex shader
+//
+//  Created by Olivier Prat on 04/24/17.
+//  Copyright 2017 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/Inputs.slh@>
+<@include gpu/Color.slh@>
+<@include gpu/Transform.slh@>
+<$declareStandardTransform()$>
+
+<@include MaterialTextures.slh@>
+<$declareMaterialTexMapArrayBuffer()$>
+
+<@include Fade.slh@>
+
+out vec4 _position;
+out vec4 _worldFadePosition;
+out vec2 _texCoord0;
+out vec2 _texCoord1;
+out vec3 _normal;
+out vec3 _tangent;
+out vec3 _color;
+out float _alpha;
+
+void main(void) {
+    // pass along the color
+    _color = colorToLinearRGB(inColor.rgb);
+    _alpha = inColor.a;
+
+    TexMapArray texMapArray = getTexMapArray();
+    <$evalTexMapArrayTexcoord0(texMapArray, inTexCoord0, _texCoord0)$>
+    <$evalTexMapArrayTexcoord1(texMapArray, inTexCoord0, _texCoord1)$>
+
+    // standard transform
+    TransformCamera cam = getTransformCamera();
+    TransformObject obj = getTransformObject();
+    <$transformModelToEyeAndClipPos(cam, obj, inPosition, _position, gl_Position)$>
+    <$transformModelToFadePos(obj, inPosition, _worldFadePosition)$>
+    <$transformModelToWorldDir(cam, obj, inNormal.xyz, _normal)$>
+    <$transformModelToWorldDir(cam, obj, inTangent.xyz, _tangent)$>
+}

libraries/render/src/render/ShapePipeline.cpp

@@ -69,6 +69,8 @@ void ShapePlumber::addPipeline(const Filter& filter, const gpu::ShaderPointer& p
     slotBindings.insert(gpu::Shader::Binding(std::string("lightBuffer"), Slot::BUFFER::LIGHT));
     slotBindings.insert(gpu::Shader::Binding(std::string("lightAmbientBuffer"), Slot::BUFFER::LIGHT_AMBIENT_BUFFER));
     slotBindings.insert(gpu::Shader::Binding(std::string("skyboxMap"), Slot::MAP::LIGHT_AMBIENT));
+    slotBindings.insert(gpu::Shader::Binding(std::string("fadeMaskMap"), Slot::MAP::FADE_MASK));
+    slotBindings.insert(gpu::Shader::Binding(std::string("fadeBuffer"), Slot::BUFFER::FADE));
 
     gpu::Shader::makeProgram(*program, slotBindings);
 
@@ -87,6 +89,8 @@ void ShapePlumber::addPipeline(const Filter& filter, const gpu::ShaderPointer& p
     locations->lightBufferUnit = program->getUniformBuffers().findLocation("lightBuffer");
     locations->lightAmbientBufferUnit = program->getUniformBuffers().findLocation("lightAmbientBuffer");
     locations->lightAmbientMapUnit = program->getTextures().findLocation("skyboxMap");
+    locations->fadeMaskTextureUnit = program->getTextures().findLocation("fadeMaskMap");
+    locations->fadeBufferUnit = program->getUniformBuffers().findLocation("fadeBuffer");
     
     ShapeKey key{filter._flags};
     auto gpuPipeline = gpu::Pipeline::create(program, state);

libraries/render/src/render/ShapePipeline.h

@@ -33,6 +33,7 @@ public:
         DEPTH_BIAS,
         WIREFRAME,
         NO_CULL_FACE,
+        FADE,
 
         OWN_PIPELINE,
         INVALID,
@@ -68,6 +69,7 @@ public:
         Builder& withDepthBias() { _flags.set(DEPTH_BIAS); return (*this); }
         Builder& withWireframe() { _flags.set(WIREFRAME); return (*this); }
         Builder& withoutCullFace() { _flags.set(NO_CULL_FACE); return (*this); }
+        Builder& withFade() { _flags.set(FADE); return (*this); }
 
         Builder& withOwnPipeline() { _flags.set(OWN_PIPELINE); return (*this); }
         Builder& invalidate() { _flags.set(INVALID); return (*this); }
@@ -126,6 +128,9 @@ public:
             Builder& withCullFace() { _flags.reset(NO_CULL_FACE); _mask.set(NO_CULL_FACE); return (*this); }
             Builder& withoutCullFace() { _flags.set(NO_CULL_FACE); _mask.set(NO_CULL_FACE); return (*this); }
 
+            Builder& withFade() { _flags.reset(FADE); _mask.set(FADE); return (*this); }
+            Builder& withoutFade() { _flags.set(FADE); _mask.set(FADE); return (*this); }
+
         protected:
             friend class Filter;
             Flags _flags{0};
@@ -150,6 +155,7 @@ public:
     bool isDepthBiased() const { return _flags[DEPTH_BIAS]; }
     bool isWireframe() const { return _flags[WIREFRAME]; }
     bool isCullFace() const { return !_flags[NO_CULL_FACE]; }
+    bool isFaded() const { return _flags[FADE]; }
 
     bool hasOwnPipeline() const { return _flags[OWN_PIPELINE]; }
     bool isValid() const { return !_flags[INVALID]; }
@@ -186,6 +192,7 @@ inline QDebug operator<<(QDebug debug, const ShapeKey& key) {
                 << "isDepthBiased:" << key.isDepthBiased()
                 << "isWireframe:" << key.isWireframe()
                 << "isCullFace:" << key.isCullFace()
+                << "isFaded:" << key.isFaded()
                 << "]";
         }
     } else {
@@ -207,6 +214,7 @@ public:
             LIGHTING_MODEL,
             LIGHT,
             LIGHT_AMBIENT_BUFFER,
+            FADE,
         };
 
         enum MAP {
@@ -218,6 +226,7 @@ public:
             OCCLUSION,
             SCATTERING,
             LIGHT_AMBIENT,
+            FADE_MASK,
         };
     };
 
@@ -236,6 +245,8 @@ public:
         int lightBufferUnit;
         int lightAmbientBufferUnit;
         int lightAmbientMapUnit;
+        int fadeBufferUnit;
+        int fadeMaskTextureUnit;
     };
     using LocationsPointer = std::shared_ptr<Locations>;
 

libraries/shared/src/RenderArgs.h

@@ -79,7 +79,8 @@ public:
     enum RenderSide { MONO, STEREO_LEFT, STEREO_RIGHT };
     enum DebugFlags {
         RENDER_DEBUG_NONE = 0,
-        RENDER_DEBUG_HULLS = 1
+        RENDER_DEBUG_HULLS = 1,
+        RENDER_DEBUG_FADE = 2,
     };
 
     RenderArgs(std::shared_ptr<gpu::Context> context = nullptr,
@@ -130,8 +131,9 @@ public:
     bool _enableTexturing { true };
 
     RenderDetails _details;
-    render::ScenePointer _scene;
-    int8_t _cameraMode { -1 };
+    render::ScenePointer _scene; // HACK
+    int8_t _cameraMode { -1 }; // HACK
+    float _debugFadePercent{ 0.f }; // HACK too
 };
 
 #endif // hifi_RenderArgs_h

scripts/developer/utilities/render/debugFade.js

@@ -0,0 +1,21 @@
+//
+//  debugFade.js
+//  developer/utilities/render
+//
+//  Olivier Prat, created on 30/04/2017.
+//  Copyright 2017 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
+//
+
+// Set up the qml ui
+var qml = Script.resolvePath('fade.qml');
+var window = new OverlayWindow({
+    title: 'Fade',
+    source: qml,
+    width: 400, 
+    height: 80
+});
+window.setPosition(50, 50);
+window.closed.connect(function() { Script.stop(); });

scripts/developer/utilities/render/fade.qml

@@ -0,0 +1,33 @@
+//
+//  fade.qml
+//  developer/utilities/render
+//
+//  Olivier Prat, created on 30/04/2017.
+//  Copyright 2017 High Fidelity, Inc.
+//
+//  Distributed under the Apache License, Version 2.0.
+//  See the accompanying file LICENSE or https://www.apache.org/licenses/LICENSE-2.0.html
+//
+import QtQuick 2.5
+import QtQuick.Controls 1.4
+import "configSlider"
+
+Column {
+    id: root
+    spacing: 8
+    property var drawOpaqueConfig: Render.getConfig("DrawOpaqueDeferred");
+
+	CheckBox {
+		text: "Force Fade"
+		checked: drawOpaqueConfig["debugFade"]
+		onCheckedChanged: { drawOpaqueConfig["debugFade"] = checked }
+	}
+	ConfigSlider {
+		label: "Percent"
+		integral: false
+		config: drawOpaqueConfig
+		property: "debugFadePercent"
+		max: 1.0
+		min: 0.0
+	}
+}