/**
* Collects Form Factor and possibly fist bounce Emission data. Note that if you call collect
* twice, the form factors will be increased! (i.e., only want to call collect once per hemicube
* draw... not collect on draw, unless you simply want to see sparsity)
*
* @param which
* @param collectF
* @param collectE
*/
private void collectData(int which) {
/* Find material for the specified face */
Material faceMaterial = scene.getObject().getFaceMaterial(which);
for (int i = 0; i < divisions * divisions * 12; i++) {
byte r = pixelData[i * 4 + 0];
byte g = pixelData[i * 4 + 1];
byte b = pixelData[i * 4 + 2];
int id = ObjectScene.colourBytesToInt(r, g, b);
if (id > 0 && id < scene.getNumFaces()) {
// TODO -- Part 2 - Collecting FFs!
/* Collect form factors for each face based on
* diffuse material (kd), weight (data) */
F[0].add(which, id, -faceMaterial.kd[0] * data[i]);
F[1].add(which, id, -faceMaterial.kd[1] * data[i]);
F[2].add(which, id, -faceMaterial.kd[2] * data[i]);
}
}
}
