/** Raytrace one frame. */
private void raytrace() {
double aspect = width / (double) height;
Ray ray = new Ray();
camPos.set(0, -distance, 0);
transform.transform(camPos);
camPos.add(.5, .5, .5);
for (int x = 0; x < width; ++x) {
double rayx = fovTan * aspect * (.5 - ((double) x) / width);
for (int y = 0; y < height; ++y) {
ray.setDefault();
ray.d.set(rayx, 1, fovTan * (.5 - ((double) y) / height));
ray.d.normalize();
transform.transform(ray.d);
ray.o.set(camPos);
raytrace(ray);
ray.color.x = QuickMath.min(1, FastMath.sqrt(ray.color.x));
ray.color.y = QuickMath.min(1, FastMath.sqrt(ray.color.y));
ray.color.z = QuickMath.min(1, FastMath.sqrt(ray.color.z));
backBuffer.setRGB(x, y, Color.getRGB(ray.color));
}
}
}
@Override
public void onZoom(int diff) {
synchronized (renderLock) {
nextDistance += .1 * diff;
nextDistance = QuickMath.max(.1, nextDistance);
}
refresh();
}
@Override
public void onMoveBackward() {
synchronized (renderLock) {
nextDistance += .1;
nextDistance = QuickMath.max(.1, nextDistance);
}
refresh();
}
@Override
public void onMouseDragged(int dx, int dy) {
synchronized (renderLock) {
double fovRad = QuickMath.degToRad(fov / 2);
yaw += (Math.PI / 250) * dx * fovRad;
pitch += (Math.PI / 250) * dy * fovRad;
if (yaw > QuickMath.TAU) {
yaw -= QuickMath.TAU;
} else if (yaw < -QuickMath.TAU) {
yaw += QuickMath.TAU;
}
updateTransform();
}
refresh();
}