Score: 125/100
Finished: 11.07.2024

miniRT

This project is an introduction to the beautiful world of Raytracing.

Compiling

• Use make to compile the project.
• For higher resolution use make hd.

Running

• Run the program with ./miniRT [scene.rt].
• Example scenes are in the scenes directory.

Scenes

Every scene needs to have a .rt extension. A detailed Explanation of the object Configuration can be found here: Object Syntax

# simple example scene
A	0.5			255,255,255
L	-50,40,0	0.6				255,255,255
C	0,0,-10		0,0,1			70.0
sp	0,0,0		5				255,255,255

Supported Objects

• Camera
• Lights: Point, Ambient
• Solids: Sphere, Plane, Triangle, Cylinder, Cone
• Materials (for all Objects)
• Textures:
  • Checkered (for all Objects)
  • UV Checkerboard (Spheres)
  • Image Textures (Spheres)
• Bump Maps (Spheres)

Features

• Multithreading (number of threads as optional paramter on the camera object)
• Anti-Aliasing (number of samples as optional parameter on the camera object)
• Shadows
• Reflections
• Full Phong Shading

Examples

Basic

Advanced

Checkerboard Texture

Left: Checkered using global coordinates, Right: Checkered using UV coordinates. Colors can be defined in the scene file.

TC checkered 255,255,255 0,0,0 1
TUC uvcheckered 0,0,0 255,255,255 40

Reflections

All objects can have a reflection value between 0 and 1. Also there is a maximum recursion depth for reflections that can be set as an optional parameter on the camera object.

Rendering Complex Objects using Triangles

Using the mini-rt-mesh-converter to convert .obj files to .rt files, you can render complex objects. Make sure your .obj file is triangulated.

Image Textures & Bump Maps

For spheres you can use image textures and bump maps. The bump map is a greyscale image that will be used to displace the normals of the sphere. The image texture is a regular image that will be mapped onto the sphere.

TF earth scenes/assets/earth.png
B bump scenes/assets/earth_bump.png

Anti-Aliasing

Anti-Aliasing can be enabled by setting the number of samples on the camera object. The more samples, the smoother the edges. Left: No Anti-Aliasing, Right: Anti-Aliasing with 100 samples.

Multiple Lights

You can have multiple lights in the scene. The color and intensity of the light can be set in the scene file.

Colored Lights