public void next() {
if (affineStep == 1) {
// just the basic routine if we calculate the real u for each pixel
myPixel.u = perspectiveCorrectedU / myPixel.invZ;
myPixel.v = perspectiveCorrectedV / myPixel.invZ;
perspectiveCorrectedU += du;
perspectiveCorrectedV += dv;
myPixel.invZ += dz;
} else {
if (counter == 0) {
myPixel.u = myUInStepPixels;
myPixel.v = myVInStepPixels;
myPixel.invZ = myInverseZInStepPixels;
calculateAffineStep();
} else {
myPixel.u += dau;
myPixel.v += dav;
myPixel.invZ += daz;
}
}
myPixel.x++;
myPixel.index++;
light += dl;
myPixel.light = light;
myPixel.normal = null;
myPixel.camPoint = null;
if (++counter >= affineStep) {
// reset counter
counter = 0;
}
}
