Creating a separate shader for the locallighting pass

libraries/render-utils/src/DeferredLightingEffect.cpp

@@ -35,6 +35,7 @@
 #include "directional_ambient_light_shadow_frag.h"
 #include "directional_skybox_light_shadow_frag.h"
 
+#include "local_lights_shading_frag.h"
 #include "point_light_frag.h"
 #include "spot_light_frag.h"
 
@@ -96,6 +97,7 @@ void DeferredLightingEffect::init() {
     loadLightProgram(deferred_light_vert, directional_ambient_light_shadow_frag, false, _directionalAmbientSphereLightShadow, _directionalAmbientSphereLightShadowLocations);
     loadLightProgram(deferred_light_vert, directional_skybox_light_shadow_frag, false, _directionalSkyboxLightShadow, _directionalSkyboxLightShadowLocations);
 
+    loadLightProgram(deferred_light_vert, local_lights_shading_frag, false, _localLight, _localLightLocations);
     loadLightProgram(deferred_light_limited_vert, point_light_frag, true, _pointLight, _pointLightLocations);
     loadLightProgram(deferred_light_vert, spot_light_frag, false, _spotLight, _spotLightLocations);
 
@@ -570,7 +572,7 @@ void RenderDeferredSetup::run(const render::SceneContextPointer& sceneContext, c
 }
 
 RenderDeferredLocals::RenderDeferredLocals() :
-_spotLightsBuffer(std::make_shared<gpu::Buffer>()) {
+_localLightsBuffer(std::make_shared<gpu::Buffer>()) {
 
 }
 
@@ -628,16 +630,16 @@ void RenderDeferredLocals::run(const render::SceneContextPointer& sceneContext,
         }
 
         if (lightIndices[0] > 0) {
-            _spotLightsBuffer._buffer->setData(lightIndices.size() * sizeof(int), (const gpu::Byte*) lightIndices.data());
-            _spotLightsBuffer._size = lightIndices.size() * sizeof(int);
+            _localLightsBuffer._buffer->setData(lightIndices.size() * sizeof(int), (const gpu::Byte*) lightIndices.data());
+            _localLightsBuffer._size = lightIndices.size() * sizeof(int);
 
             // Spot light pipeline
-            batch.setPipeline(deferredLightingEffect->_spotLight);
-            batch._glUniform4fv(deferredLightingEffect->_spotLightLocations->texcoordFrameTransform, 1, reinterpret_cast<const float*>(&textureFrameTransform));
+            batch.setPipeline(deferredLightingEffect->_localLight);
+            batch._glUniform4fv(deferredLightingEffect->_localLightLocations->texcoordFrameTransform, 1, reinterpret_cast<const float*>(&textureFrameTransform));
 
             // Bind the global list of lights and the visible lights this frame
-            batch.setUniformBuffer(deferredLightingEffect->_spotLightLocations->lightBufferUnit, deferredLightingEffect->getLightStage()._lightArrayBuffer);
-            batch.setUniformBuffer(deferredLightingEffect->_spotLightLocations->lightIndexBufferUnit, _spotLightsBuffer);
+            batch.setUniformBuffer(deferredLightingEffect->_localLightLocations->lightBufferUnit, deferredLightingEffect->getLightStage()._lightArrayBuffer);
+            batch.setUniformBuffer(deferredLightingEffect->_localLightLocations->lightIndexBufferUnit, _localLightsBuffer);
             batch.draw(gpu::TRIANGLE_STRIP, 4);
         }
     }

libraries/render-utils/src/DeferredLightingEffect.h

@@ -86,6 +86,8 @@ private:
     gpu::PipelinePointer _directionalAmbientSphereLightShadow;
     gpu::PipelinePointer _directionalLightShadow;
 
+    gpu::PipelinePointer _localLight;
+
     gpu::PipelinePointer _pointLight;
     gpu::PipelinePointer _spotLight;
 
@@ -97,6 +99,7 @@ private:
     LightLocationsPtr _directionalAmbientSphereLightShadowLocations;
     LightLocationsPtr _directionalLightShadowLocations;
 
+    LightLocationsPtr _localLightLocations;
     LightLocationsPtr _pointLightLocations;
     LightLocationsPtr _spotLightLocations;
 
@@ -159,7 +162,7 @@ public:
         const LightingModelPointer& lightingModel,
         const SurfaceGeometryFramebufferPointer& surfaceGeometryFramebuffer);
 
-    gpu::BufferView _spotLightsBuffer;
+    gpu::BufferView _localLightsBuffer;
 
     RenderDeferredLocals();
 

libraries/render-utils/src/local_lights_shading.slf

@@ -0,0 +1,102 @@
+<@include gpu/Config.slh@>
+<$VERSION_HEADER$>
+//  Generated on <$_SCRIBE_DATE$>
+//
+//  local_lights_shading.frag
+//  fragment shader
+//
+//  Created by Sam Gateau on 9/6/2016.
+//  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
+//
+
+// Everything about deferred buffer
+<@include DeferredBufferRead.slh@>
+
+<$declareDeferredCurvature()$>
+
+// Everything about light
+<@include model/Light.slh@>
+<$declareLightBuffer(32)$>
+uniform lightIndexBuffer {
+    int lightIndex[32];
+};
+<@include LightingModel.slh@>
+
+<@include LightPoint.slh@>
+<$declareLightingPoint(supportScattering)$>
+<@include LightSpot.slh@>
+<$declareLightingSpot(supportScattering)$>
+
+in vec4 _texCoord0;
+out vec4 _fragColor;
+
+void main(void) {
+
+    // Grab the fragment data from the uv
+    vec2 texCoord = _texCoord0.st;
+
+    vec4 fragPosition = unpackDeferredPositionFromZeye(texCoord);
+    DeferredFragment frag = unpackDeferredFragmentNoPosition(texCoord);
+
+    if (frag.mode == FRAG_MODE_UNLIT) {
+        discard;
+    }
+
+    frag.position = fragPosition;
+
+    vec4 midNormalCurvature;
+    vec4 lowNormalCurvature;
+    if (frag.mode == FRAG_MODE_SCATTERING) {
+        unpackMidLowNormalCurvature(texCoord, midNormalCurvature, lowNormalCurvature);
+    }
+
+    // Frag pos in world
+    mat4 invViewMat = getViewInverse();
+    vec4 fragPos = invViewMat * fragPosition;
+
+    // Frag to eye vec
+    vec4 fragEyeVector = invViewMat * vec4(-frag.position.xyz, 0.0);
+    vec3 fragEyeDir = normalize(fragEyeVector.xyz);
+
+    int numLights = lightIndex[0];
+    for (int i = 0; i < numLights; i++) {
+        // Need the light now
+        Light light = getLight(lightIndex[i + 1]);
+        bool isSpot = light_isSpot(light);
+        // Clip againgst the light volume and Make the Light vector going from fragment to light center in world space
+        vec4 fragLightVecLen2;
+        vec4 fragLightDirLen;
+        float cosSpotAngle;
+        if (isSpot) {
+            if (!clipFragToLightVolumeSpot(light, fragPos.xyz, fragLightVecLen2, fragLightDirLen, cosSpotAngle)) {
+                continue;
+            }
+        } else {
+            if (!clipFragToLightVolumePoint(light, fragPos.xyz, fragLightVecLen2)) {
+                continue;
+            }
+        }
+
+        vec3 diffuse;
+        vec3 specular;
+
+        if (isSpot) {
+            evalLightingSpot(diffuse, specular, light,
+                fragLightDirLen.xyzw, cosSpotAngle, fragEyeDir, frag.normal, frag.roughness,
+                frag.metallic, frag.fresnel, frag.albedo, 1.0,
+                frag.scattering, midNormalCurvature, lowNormalCurvature);
+        } else {
+            evalLightingPoint(diffuse, specular, light,
+                fragLightVecLen2.xyz, fragEyeDir, frag.normal, frag.roughness,
+                frag.metallic, frag.fresnel, frag.albedo, 1.0,
+                frag.scattering, midNormalCurvature, lowNormalCurvature);
+        }
+
+        _fragColor.rgb += diffuse;
+        _fragColor.rgb += specular;
+    }
+}
+