A Ray Tracer in openFrameworks
This ray tracer implementation was written as exercise for this online course, course prepared by prof. Morgan McGuire.
It is intended for personal use. It provides a way to load an .obj file through the ofxAssimpModelLoader and render it.
You need to install tbb. On MacOS, follow this answer on SO
You need to set up a scene
shared_ptr<ofImage> image;
ofxAssimpModelLoader modelCornell;
vector<of3dPrimitive> primitives;
vector<ofLight> lights;
ofNode centerOfTheScene;
modelCornell.loadModel("CornellBox-Original.obj", 20);
// set up a scene
centerOfTheScene.setPosition(0, 0, 0);
// set the lights
ofLight light;
light.setPointLight();
light.setPosition(0, +0.5, -3.0);
lights.push_back(light);
// read the models and fullfill the primitives vector
ofxRTMeshHelper::readModelAndGetPrimitives(modelCornell, primitives, centerOfTheScene);
// position the primitives
centerOfTheScene.move(0, -1, -3);and this is how you launch the render
ofxRTPinholeCamera camera;
shared_ptr<ofImage> image;
image->allocate(800, 600, OF_IMAGE_COLOR);
ofxRayTracer rayTracer = ofxRayTracer(primitives, lights);
rayTracer.traceImage(camera, image);Have a look at the example-cornellbox app.
On this file there are my notes written while I was writing the renderer
TODO:
- colors
- multithread
- indirect rays
- colored shadows
- antialiasing