From 93a4eb85f0bb62fc5f67d8cc5dc30bba927349ef Mon Sep 17 00:00:00 2001
From: lindayukeyi <keyiyu@outlook.com>
Date: Thu, 15 Oct 2020 17:57:40 -0400
Subject: [PATCH] 'gbuffer'

---
 src/pathtrace.cu   | 15 ++++++++++++---
 src/sceneStructs.h |  2 ++
 2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/src/pathtrace.cu b/src/pathtrace.cu
index 23e5f90..88f9bd2 100644
--- a/src/pathtrace.cu
+++ b/src/pathtrace.cu
@@ -74,11 +74,18 @@ __global__ void gbufferToPBO(uchar4* pbo, glm::ivec2 resolution, GBufferPixel* g
     if (x < resolution.x && y < resolution.y) {
         int index = x + (y * resolution.x);
         float timeToIntersect = gBuffer[index].t * 256.0;
+        glm::vec3 pos = gBuffer[index].position;
+        glm::vec3 nor = gBuffer[index].normal;
+        glm::ivec3 color;
+
+        color.x = glm::clamp((int) (nor.x * 255.0), 0, 255);
+        color.y = glm::clamp((int)(nor.y * 255.0), 0, 255);
+        color.z = glm::clamp((int)(nor.z * 255.0), 0, 255);
 
         pbo[index].w = 0;
-        pbo[index].x = timeToIntersect;
-        pbo[index].y = timeToIntersect;
-        pbo[index].z = timeToIntersect;
+        pbo[index].x = color.x;//timeToIntersect;
+        pbo[index].y = color.y;//timeToIntersect;
+        pbo[index].z = color.z;//timeToIntersect;
     }
 }
 
@@ -282,6 +289,8 @@ __global__ void generateGBuffer (
   if (idx < num_paths)
   {
     gBuffer[idx].t = shadeableIntersections[idx].t;
+    gBuffer[idx].normal = shadeableIntersections[idx].surfaceNormal;
+    gBuffer[idx].position = getPointOnRay(pathSegments[idx].ray, shadeableIntersections->t);
   }
 }
 
diff --git a/src/sceneStructs.h b/src/sceneStructs.h
index da7e558..de38ec2 100644
--- a/src/sceneStructs.h
+++ b/src/sceneStructs.h
@@ -79,4 +79,6 @@ struct ShadeableIntersection {
 // What information might be helpful for guiding a denoising filter?
 struct GBufferPixel {
   float t;
+  glm::vec3 position;
+  glm::vec3 normal;
 };