From 25616be7c1b51858fbb5d9ead6603a8debc15682 Mon Sep 17 00:00:00 2001
From: sam <sam>
Date: Thu, 8 Sep 2016 02:16:13 -0700
Subject: [PATCH] introducing the light Clusters

---
 libraries/render-utils/src/LightClusters.h | 52 +++++++++++++++++++++-
 libraries/render-utils/src/LightStage.h    |  2 +-
 2 files changed, 52 insertions(+), 2 deletions(-)

diff --git a/libraries/render-utils/src/LightClusters.h b/libraries/render-utils/src/LightClusters.h
index 3557ec0ed0..b3a2271b2e 100644
--- a/libraries/render-utils/src/LightClusters.h
+++ b/libraries/render-utils/src/LightClusters.h
@@ -15,11 +15,61 @@
 
 #include "LightStage.h"
 
-class ViewFrustum;
+#include <ViewFrustum.h>
+/*
+class FrustumGrid {
+public:
+    float _near { 0.1f };
+    float _nearPrime { 1.0f };
+    float _farPrime { 400.0f };
+    float _far { 10000.0f };
 
+    glm::uvec3 _dims { 16, 16, 16 };
+
+    float viewToLinearDepth(float depth) const {
+        float nDepth = -depth;
+        float ldepth = (nDepth - _nearPrime) / (_farPrime - _nearPrime);
+
+        if (ldepth < 0.0f) {
+            return (nDepth - _near) / (_nearPrime - _near) - 1.0f;
+        }
+        if (ldepth > 1.0f) {
+            return (nDepth - _farPrime) / (_far - _farPrime) + 1.0f;
+        }
+        return ldepth;
+    }
+
+    float linearToGridDepth(float depth) const {
+        return depth / (float) _dims.z;
+    }
+
+    glm::vec2 linearToGridXY(const glm::vec3& cpos) const {
+        return glm::vec2(cpos.x / (float) _dims.x, cpos.y / (float) _dims.y);
+    }
+
+    int gridDepthToLayer(float gridDepth) const {
+        return (int) gridDepth;
+    }
+
+    glm::ivec3 viewToGridPos(const glm::vec3& pos) const {
+        
+        return glm::ivec3(0);
+    }
+
+};
+*/
 class LightClusters {
 public:
     
+    LightClusters();
+
+
+    void updateFrustum(const ViewFrustum& frustum);
+
+    
+
+    ViewFrustum _frustum;
+
     LightStagePointer _lightStage;
 
     gpu::BufferPointer _lightIndicesBuffer;
diff --git a/libraries/render-utils/src/LightStage.h b/libraries/render-utils/src/LightStage.h
index 4319eb80ba..b0d5c1749f 100644
--- a/libraries/render-utils/src/LightStage.h
+++ b/libraries/render-utils/src/LightStage.h
@@ -110,5 +110,5 @@ public:
 
     Shadows _shadows;
 };
-
+using LightStagePointer = std::shared_ptr<LightStage>;
 #endif