public final int toRGB() {
int ir = (int) (r * 255 + 0.5);
int ig = (int) (g * 255 + 0.5);
int ib = (int) (b * 255 + 0.5);
ir = MathUtils.clamp(ir, 0, 255);
ig = MathUtils.clamp(ig, 0, 255);
ib = MathUtils.clamp(ib, 0, 255);
return (ir << 16) | (ig << 8) | ib;
}
/**
* Quantize the specified colors to 8-bit RGB format. The returned array contains 3 bytes for each
* color in the original array.
*
* @param color array of colors to quantize
* @return array of quantized RGB values
*/
public static final byte[] quantizeRGB8(Color[] color) {
byte[] output = new byte[color.length * 3];
for (int i = 0, index = 0; i < color.length; i++, index += 3) {
float[] rgb = color[i].getRGB();
output[index + 0] = (byte) MathUtils.clamp((int) (rgb[0] * 255 + 0.5f), 0, 255);
output[index + 1] = (byte) MathUtils.clamp((int) (rgb[1] * 255 + 0.5f), 0, 255);
output[index + 2] = (byte) MathUtils.clamp((int) (rgb[2] * 255 + 0.5f), 0, 255);
}
return output;
}
public void prepareShadingState(ShadingState state) {
state.init();
state.getRay().getPoint(state.getPoint());
Instance parent = state.getInstance();
Point3 p = parent.transformWorldToObject(state.getPoint());
float deriv = p.x * p.x + p.y * p.y + p.z * p.z - ri2 - ro2;
state.getNormal().set(p.x * deriv, p.y * deriv, p.z * deriv + 2 * ro2 * p.z);
state.getNormal().normalize();
double phi = Math.asin(MathUtils.clamp(p.z / ri, -1, 1));
double theta = Math.atan2(p.y, p.x);
if (theta < 0) theta += 2 * Math.PI;
state.getUV().x = (float) (theta / (2 * Math.PI));
state.getUV().y = (float) ((phi + Math.PI / 2) / Math.PI);
state.setShader(parent.getShader(0));
state.setModifier(parent.getModifier(0));
Vector3 worldNormal = parent.transformNormalObjectToWorld(state.getNormal());
state.getNormal().set(worldNormal);
state.getNormal().normalize();
state.getGeoNormal().set(state.getNormal());
state.setBasis(OrthoNormalBasis.makeFromW(state.getNormal()));
}
public final Color clamp(float min, float max) {
r = MathUtils.clamp(r, min, max);
g = MathUtils.clamp(r, min, max);
b = MathUtils.clamp(r, min, max);
return this;
}
