COMP 557 - Fall 2009 - Assignment 5
Ray Tracing
Milestone Due 23:59 pm Monday 16 November
Complete Assignment Due 23:59 pm Monday 30 November
Features
Some features that are shared among rendered images.
Jittered Super Sampling
To do this, I splitted each pixel into many small ones, and cast a ray from camera point to the center of each subpixel. Next, I did perturb the ray using normal distribution.
Lighting, Area Lights, and Soft Shadows
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Image : cow.png Scene : scene_cow.xml Render time : 6008.89 s Resolution : 800x600 Subpixel Sampling : 4 |
Shadow projection.
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Image : softshadow.png Scene : scene_shadow.xml Render time : 2332.172 s Resolution : 800x600 Subpixel Sampling : 4 |
Phong's shading, Area light.
Reflection
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Image : mirror.png Scene : scene_mirror.xml Render time : 93.969 s Resolution : 800x600 Subpixel Sampling : 4 |
Cascading compute ray casting, up to 10 bounces.
Simple Acceleration for Meshes
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Image : tetra.png Scene : scene_tetra.xml Render time : 42.766 s w/o Bound : 404.688 s Resolution : 800x600 Subpixel Sampling : 4 |
Applying bounding box to mesh will greatly reduce render time.
Results
Here are some result images listed by types of object.
Sphere Intersection
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Image : spheres.png Scene : scene_sphere.xml Render time : 58.734 s Resolution : 800x600 Subpixel Sampling : 4 |
This scene was taken from E. Piuze-Phaneuf's Testing scene.
Cube
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Image : cubes.png Scene : scene_cube.xml Render time : 1375.906 s Resolution : 800x600 Subpixel Sampling : 4 |
This scene was also taken from E. Piuze-Phaneuf's Testing scene
Triangle Meshes, Subdivision Surfaces, and Instances
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Image : meshes.png Scene : scene_meshes.xml Render time : 610.766 s Resolution : 800x600 Subpixel Sampling : 4 |
There are three subdivided meshes involving in this scene, two torus and a tetrahedron.
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Image : output1.png Scene : scene1.xml Render time : 1426.969 s Resolution : 800x600 Subpixel Sampling : 4 |
Where is he looking?
Novel Scene
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Image : output3.png Scene : scene3.xml Render time : 7632.828 s Resolution : 800x600 Subpixel Sampling : 4 |
"Unleash the true power", who said a tetrahedron can't do anything?
In this image, I implemented light ball effect and impulsed surface. This first one is just a transparent sphere, while the second one is a plane with blended normal vectors.