Renderer(int line) {
startLine = line;
if (!scene.antiAliasing) {
sampled = false;
samples = Math.max(scene.raysPerPixel, DEBUG_samples);
// Force it to be a perfect square
samples = (int) Math.sqrt(samples);
samples = samples * samples;
imageSamples = new Double3D[samples];
for (int i = 0; i < samples; i++) imageSamples[i] = new Double3D(0, 0, 0);
// Make samples are in the range [0,1]
Sample.multiJitter(imageSamples, samples);
// Make samples are in the range [-2,2]
Sample.cubicSplineFilter(imageSamples, samples);
// Scale image samples to [-.5,.5] and adjust to worldCoords this should be +-.5 pixels
// since we're in the middle of a pixel to begin with
for (int i = 0; i < samples; i++) {
imageSamples[i].x = widthRatio / 2 * (imageSamples[i].x / 4.0);
imageSamples[i].y = heightRatio / 2 * (imageSamples[i].y / 4.0);
// System.out.println("Jitter by: " + imageSamples[i] + " Pixel width: " + widthRatio + "
// Pixel height: " + heightRatio );
}
imageSamples[0].x++;
imageSamples[0].x--;
}
}
boolean transmissionDirection(Ray ray, HitRecord hit, Ray transmission) {
double n = transmission.r.prevR.n;
double nt = transmission.r.n;
Double3D N = hit.normal;
Double3D D = ray.dir;
double cosine = -D.dot(N);
if (n > nt) { // We're inside, so reverse the normal
N = N.sMult(-1);
cosine = -D.dot(N);
}
double nRatio = n / nt;
double cosinePSq = 1.0 - nRatio * nRatio * (1.0f - cosine * cosine);
// check for total internal refraction here
if (cosinePSq < 0.0f) return false; // total internal refraction
else {
// D - N(N.D)
// Double3D pOne = D.minus( N.sMult(N.dot(D)) ).sMult(nRatio);
double inside = nRatio * cosine - Math.sqrt(cosinePSq);
Double3D temp = D.sMult(nRatio).plus(N.sMult(inside)).getUnit();
transmission.dir.x = temp.x;
transmission.dir.y = temp.y;
transmission.dir.z = temp.z;
}
return true;
}
Renderer() {
xMin = scene.camera.viewportLeft + 0.5;
xMax = scene.camera.viewportRight;
yMin = scene.camera.viewportBottom + 0.5;
yMax = scene.camera.viewportTop;
if (scene.antiAliasing) {
samples = Math.max(scene.raysPerPixel, DEBUG_samples);
// Force it to be a perfect square
samples = (int) Math.sqrt(samples);
samples = samples * samples;
imageSamples = new Double3D[samples];
for (int i = 0; i < samples; i++) imageSamples[i] = new Double3D(0, 0, 0);
Sample.multiJitter(imageSamples, samples);
// Samples are in the range [-2,2]
Sample.cubicSplineFilter(imageSamples, samples);
// Scale image samples to [-1,1]
for (int i = 0; i < samples; i++) {
imageSamples[i].x = widthRatio * imageSamples[i].x / 2.0;
imageSamples[i].y = heightRatio * imageSamples[i].y / 2.0;
}
}
}
