/** Reallocates and resets all matrices */
public void resetMatrices() {
/* Store material for a particular accessed face */
Material faceMaterial = new Material();
int n = scene.getNumFaces();
for (int j = 0; j < 3; j++) {
F[j] = new FlexCompRowMatrix(n, n);
B[j] = new DenseVector(n);
E[j] = new DenseVector(n);
// make the matrix the identity...
for (int i = 0; i < n; i++) {
F[j].set(i, i, 1);
/* TODO! Emission for each face
/* Initialize face/patch based on whether luminous
* if lit, set E to diffuse lighting for each colour
* (since surface radiance == diffuse material properties)
*/
faceMaterial = scene.getObject().getFaceMaterial(i);
/* If lit patch, initialize to amount of light based on diffuse parameter */
if (faceMaterial.emission) {
E[j].add(i, faceMaterial.kd[j]); // Set light for each colour for each face
}
}
}
}
/**
* 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]);
}
}
}