Project3: Xiao Wei - code submission

CMakeLists.txt

@@ -73,6 +73,7 @@ set(headers
     src/sceneStructs.h
     src/preview.h
     src/utilities.h
+    src/tiny_obj_loader.h
     )
 
 set(sources

README.md

@@ -3,11 +3,78 @@ 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)
+* Xiao Wei
+* Tested on: Windows 10, i7-9750h @ 2.6GHz 16.0GB, RTX 2070 with MAX-Q Design, 16GB
+* 1 late day applied
+
+
+
+Feature
+======================
+* Ideal Diffuse surfaces
+* Perfectly specular-reflective (mirrored) surfaces
+* Path continuation/termination using Stream Compaction
+* Caching the first bounce intersections for re-use
+* Mesh Loading with bounding volume intersection culling
+* Refraction
+* Stochastic Sampled Antialiasing
+* Physically-based depth-of-field
+
+Rendering Results
+======================
+
+## Ideal Diffuse
+![noanti](https://user-images.githubusercontent.com/66859615/136673557-24e26ab2-9a1e-4304-9a09-87f7eda68cd4.png)
+
+
+## Perfect specular with mesh loaded teapot
+![specular teapot](https://user-images.githubusercontent.com/66859615/136673548-8e275359-bb45-43e5-81a6-0187debafab5.png)
+
+## Refractions
+ Refraction with Frensel effects using Schlick's approximation
+![refract1](https://user-images.githubusercontent.com/66859615/136673533-ad4f9364-603a-4293-9254-7dec0bc53e96.png)
+![refract2](https://user-images.githubusercontent.com/66859615/136673535-7ea1c7bd-6c9f-42db-adea-fe298c5158f4.png)
+## Antialiasing
+For Antialiasing, I divided the pixels into grids and the points from which the rays are shoot is generated randomly inside that grid, and at each iteration we will choose one grid to use and we will use all of them one by one. The first picture is rendered WITHOUT antialiasing and the second is rendered with antialiasing. You can notice the aliasing on the left and right edge of red box is significantly mitigated in the second picture.
+
+![noanti](https://user-images.githubusercontent.com/66859615/136673564-f1e90853-cc2a-48ee-9a18-244e4d9cbc1a.png)
+![anti](https://user-images.githubusercontent.com/66859615/136674065-54fc0d35-4b73-4e92-a2ad-589e69bccf32.png)
+
+
+## Depth of Field
+Depth of Field is implemented according to PBRT
+![dof](https://user-images.githubusercontent.com/66859615/136673562-edfa4ca5-fdf3-4232-97e9-73670eaf3749.png)
+
+Performance analysis
+======================
+## Mesh Bounding Box
+Time Comparison of rendering the following teapot with and without Bounding Box (200 iterations and depth)
+
+![cornell 2021-10-09_21-32-53z 200samp](https://user-images.githubusercontent.com/66859615/136674312-d80bf5ed-e48a-42f9-a7fb-046a63027de3.png)
+
+Without Bounding Box | With Bounding Box
+------------ | -------------
+1min 42sec 68ms | 1min 13sec 43ms
+
+As you can see, we can get about 28.4% performance improvement with bounding box in my case
+
+## Material sort and First Bounce Cache
+
+The performance of Material sort is measured with the following rendering with 300 iterations
+![cornell 2021-10-09_21-52-39z 300samp](https://user-images.githubusercontent.com/66859615/136674721-4458c1b5-3075-49b3-b070-305caf1342b7.png)
+
+
+![20211009100655](https://user-images.githubusercontent.com/66859615/136674835-3b092577-49b1-427e-9404-091a65b3d408.png)
+
+
+Surprisingly, the material sort actually makes the performance worse in my case. I think it is mostly because there are not so many materials in the scene and the sorting consumes more time than what we save from the better memory placement.
+
+## First Bounce Cache
+The performance of Cache Bounce is measured with the following rendering with 300 iterations
+
+![cornell 2021-10-09_22-20-37z 300samp](https://user-images.githubusercontent.com/66859615/136675214-58feb48e-1778-4efd-bfa5-bef7797c01e7.png)
+![20211009102803](https://user-images.githubusercontent.com/66859615/136675217-966a761f-1298-473e-a147-2927bd79a540.png)
+With no surprise, by caching the first bounce, we improved the performance a lot. I initially used some simple scene to test but the improvement was not obvious because the first bounce doesn't take much time. Then I switched to this scene with mesh.
 
-### (TODO: Your README)
 
-*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.
 

scenes/cornell.txt

@@ -55,7 +55,7 @@ FOVY        45
 ITERATIONS  5000
 DEPTH       8
 FILE        cornell
-EYE         0.0 5 10.5
+EYE         0.0 5 4.5
 LOOKAT      0 5 0
 UP          0 1 0
 
@@ -108,10 +108,20 @@ TRANS       5 5 0
 ROTAT       0 0 0
 SCALE       .01 10 10
 
-// Sphere
+// front wall
 OBJECT 6
-sphere
+cube
+material 1
+TRANS       0 5 5
+ROTAT       0 90 0
+SCALE       .01 10 10
+
+
+// TEAPOT
+OBJECT 7
+mesh
+../mesh/teapot_s1.obj
 material 4
-TRANS       -1 4 -1
+TRANS       0 0  0
 ROTAT       0 0 0
-SCALE       3 3 3
+SCALE       15 15 15

scenes/dof.txt

@@ -0,0 +1,173 @@
+// Emissive material (light)
+MATERIAL 0
+RGB         1 1 1
+SPECEX      0
+SPECRGB     0 0 0
+REFL        0
+REFR        0
+REFRIOR     0
+EMITTANCE   5
+
+// Diffuse white
+MATERIAL 1
+RGB         .98 .98 .98
+SPECEX      0
+SPECRGB     0 0 0
+REFL        0
+REFR        0
+REFRIOR     0
+EMITTANCE   0
+
+// Diffuse red
+MATERIAL 2
+RGB         .85 .35 .35
+SPECEX      0
+SPECRGB     0 0 0
+REFL        0
+REFR        0
+REFRIOR     0
+EMITTANCE   0
+
+// Diffuse green
+MATERIAL 3
+RGB         .35 .85 .35
+SPECEX      0
+SPECRGB     0 0 0
+REFL        0
+REFR        0
+REFRIOR     0
+EMITTANCE   0
+
+// Specular white
+MATERIAL 4
+RGB         .98 .98 .98
+SPECEX      0
+SPECRGB     .98 .98 .98
+REFL        1
+REFR        0
+REFRIOR     0
+EMITTANCE   0
+
+
+// glass white
+MATERIAL 5
+RGB         .98 .98 .98
+SPECEX      1
+SPECRGB     .98 .98 .98
+REFL        1
+REFR        1
+REFRIOR     3
+EMITTANCE   0
+
+// Diffuse blue
+MATERIAL 6
+RGB         .35 .35 .85
+SPECEX      0
+SPECRGB     0 0 0
+REFL        0
+REFR        0
+REFRIOR     0
+EMITTANCE   0
+
+
+// Diffuse pink
+MATERIAL 7
+RGB         .81 .13 .94
+SPECEX      0
+SPECRGB     0 0 0
+REFL        0
+REFR        0
+REFRIOR     0
+EMITTANCE   0
+
+// Camera
+CAMERA
+RES         800 800
+FOVY        45
+ITERATIONS  5000
+DEPTH       8
+FILE        cornell
+EYE         0.0 5 4.5
+LOOKAT      0 5 0
+UP          0 1 0
+
+
+// Ceiling light
+OBJECT 0
+cube
+material 0
+TRANS       0 10 0
+ROTAT       0 0 0
+SCALE       3 .3 3
+
+// Floor
+OBJECT 1
+cube
+material 1
+TRANS       0 0 0
+ROTAT       0 0 0
+SCALE       10 .01 10
+
+// Ceiling
+OBJECT 2
+cube
+material 1
+TRANS       0 10 0
+ROTAT       0 0 90
+SCALE       .01 10 10
+
+// Back wall
+OBJECT 3
+cube
+material 1
+TRANS       0 5 -5
+ROTAT       0 90 0
+SCALE       .01 10 10
+
+// Left wall
+OBJECT 4
+cube
+material 2
+TRANS       -5 5 0
+ROTAT       0 0 0
+SCALE       .01 10 10
+
+// Right wall
+OBJECT 5
+cube
+material 3
+TRANS       5 5 0
+ROTAT       0 0 0
+SCALE       .01 10 10
+
+// front wall
+OBJECT 6
+cube
+material 1
+TRANS       0 5 5
+ROTAT       0 90 0
+SCALE       .01 10 10
+
+
+OBJECT 7
+sphere
+material 3
+TRANS       1 3  2
+ROTAT       0 0 0
+SCALE       2 2 2
+
+OBJECT 8
+sphere
+material 7
+TRANS       3 3  4
+ROTAT       0 0 0
+SCALE       2 2 2
+
+OBJECT 9
+sphere
+material 2
+TRANS       0 3  1
+ROTAT       0 0 0
+SCALE       2 2 2
+
+