method render

Source

OutputMatrix render() {

  List<Sample> samples;
  List<Ray> primaryRays;

  OutputMatrix om = new OutputMatrix(yRes, xRes);

  // for each pixel..
  for (int x = 0; x < xRes; x++) {

    if ((x+1) % 10 == 0) {print('Rendering column ${x+1}..');} //TODO

    for (int y = 0; y < yRes; y++) {
      // color information for this pixel
      Vector4 color = new Vector4.zero();

      // generate samples
      samples = sampler.getSamples(x, y);

      // for each sample
      for (Sample s in samples) {
        // temporary color vector for this sample
        Vector4 tempColor = new Vector4.zero();

        primaryRays = camera.getPrimaryRays(x, y);

        // integrate rays..
        for (Ray r in primaryRays) {

          // integrate radiance
          //TODO count bounces for indirect radiance
          Intersection ret = scene.intersect(r, MAX_DIST);
          if (ret.distance >= EPS && ret.distance < MAX_DIST) {

            //print ('hit at ${ret.distance} with ${ret.prim} on ${ret.hitPoint}');

            // get shader
            Shader s = scene.getShader(ret);

            // get ambience, reflectance and indirect radiance
            tempColor += s.getAmbientCoeff().multiply(ambientLight);
            //TODO for all light sources, integrate indirect radiance.
            tempColor += s.getReflectance(-r.direction, r.origin - ret.hitPoint); //TODO dummy light source at camera

            tempColor += s.getIndirectRadiance();
          }
        }

        // weight ray
        double rayWeight = 1.0 / primaryRays.length;
        tempColor.scale(rayWeight);

        // weight sample
        tempColor.scale(s.weight);

        // add to overall pixel color
        color += tempColor;

        // alpha always set manually - not supported in shaders yet
        color.a = 1.0;

        // set pixel in output matrix
        om.setPixel(y, x, color.rgba);
      }
    }
  }

  return om;
}