qzeng2490 / raytracing Goto Github PK

In this homework you will write a simple ray tracer to render a scene composed of two spheres and a tetrahedron. The two spheres are of different radii and colors (e.g., blue and green). Pick the centers and the radii of the spheres so that they do not intersect in the 3-D space. For simplicity, you may assume a directional light and a parallel camera geometry for rendering purposes. This means that a single LookAt vector can be used to generate all rays. For example, you may set the LightDir = (0, 1, 0) and LookAt = (0, 0, −1).

• Write a simple OpenGL program to display an image. Fix the window size (e.g., 256 × 256). You may use the glDrawPixels function to draw the contents of an array of RGB values. Verify the correctness of your program by displaying a test image that you generate (e.g., color stripes).

• Generate parallel rays and solve the ray-object intersection problems to determine the color of each pixel. Verify the correctness of your ray tracer by rendering the scene from multiple angles (e.g., change the LookAt vector).

• Add ambient, diffuse and specular shading to your ray tracer. Pick the ambient, diffuse and specular constants and light intensities to reflect a realistic rendering of the scene.

• Add a glazed surface to the scene. You may choose to set one of the objects in the scene or have a plane below these objects that appears as a glazed surface.

• Create a small animation by changing the LookAt vector and assembling the rendered images into a movie. 10pts

• Along with the source code and makefile, submit a report (a PDF file) that describes and documents your experiments for each step of the homework.