Akiko Zhu

README.md

@@ -3,11 +3,40 @@ CUDA Path Tracer
 
 **University of Pennsylvania, CIS 565: GPU Programming and Architecture, Project 3**
 
-* (TODO) YOUR NAME HERE
-* Tested on: (TODO) Windows 22, i7-2222 @ 2.22GHz 22GB, GTX 222 222MB (Moore 2222 Lab)
+* Akiko Zhu
+  * [LinkedIn](https://www.linkedin.com/in/geming-akiko-zhu-b6705a255/)
+* Tested on: Windows 11, i9-12900H @ 2.50GHz 16GB, RTX 3070Ti 8GB (Personal)
 
-### (TODO: Your README)
+### Result
+![](images/out01.png)
+![](images/out02.png)
+*models from the free FBX download website
+### Features
+This project is a GPU-based CUDA Path Tracer
+- Implemented a basic diffuse shading function
+- Implemented a perfectly mirror and imperfect specular reflection function
+- Implemented stream compaction to remove the terminated ray paths
+- Implemented stochastic sampled antialiasing
+- (Extra Feature) Arbitary OBJ mesh file loading
+- (Extra Feature) Albedo and Normal Texture mapping function
+- (Extra Feature) BVH hierarchical spatial data structure
+- (Extra Feature) Refraction shading
+### Analysis
+#### Basic BSDF
+In the first part, I implemented Bidirectional Scattering Distribution Function. The following images show the path tracer can render diffuse, perfect mirror, and refraction shader.
+|![](images/diffuse.png)|![](images/reflect.png)|![](images/fresnel.png)|
+|:--:|:--:|:--:|
+|Diffuse|Reflection|Refraction|
 
-*DO NOT* leave the README to the last minute! It is a crucial part of the
-project, and we will not be able to grade you without a good README.
+#### OBJ file loading with Hierarchical Spatial Data Structure Accelaration
+In this part, I implemented an efficient ray intersection testing function that can speed up the process of finding ray-object intersections. I grouped objects in a hierarchy of bounding volumes so that the intersection checks can be speeded up from O(n) to O(log n).
+The left image shows that BVH data structure fast the render speed per frame (60.828 ms at about 146 iterations), while the right image shows that without BVH data structure, it takes 90.138 ms/frame at 145 render iterations.
+|![](images/WithBVH.png)|![](images/WithoutBVH.png)|
+|:--:|:--:|
+|w. BVH|wt. BVH|
 
+#### Texture Mapping
+In this part, I implemented albedo texture loading and normal texture loading.
+|![](images/wNormal.png)|![](images/wtNormal.png)|
+|:--:|:--:|
+|Albedo and Normal|Albedo|