public Triangle(Mesh owner, int index0, int index1, int index2, Material material) {
this.owner = owner;
index = new int[3];
index[0] = index0;
index[1] = index1;
index[2] = index2;
Point3 v0 = owner.getVertex(index0);
Point3 v1 = owner.getVertex(index1);
Point3 v2 = owner.getVertex(index2);
if (!owner.existsNormals()) {
Vector3 e0 = new Vector3(), e1 = new Vector3();
e0.sub(v1, v0);
e1.sub(v2, v0);
norm = new Vector3();
norm.cross(e0, e1);
}
a = v0.x - v1.x;
b = v0.y - v1.y;
c = v0.z - v1.z;
d = v0.x - v2.x;
e = v0.y - v2.y;
f = v0.z - v2.z;
this.setMaterial(material);
}
/**
* Calculate the BRDF value for this material at the intersection described in record. Returns the
* BRDF color in outColor.
*
* @param outColor Space for the output color
* @param scene The scene
* @param lights The lights
* @param toEye Vector pointing towards the eye
* @param record The intersection record, which hold the location, normal, etc.
* @param depth The depth of recursive calls. You can ignore this parameter.
* @param contribution The contribution of the current ray. You can ignore this parameter.
* @param internal You can ignore this parameter.
*/
public void shade(
Color outColor,
Scene scene,
ArrayList<Light> lights,
Vector3 toEye,
IntersectionRecord record,
int depth,
double contribution,
boolean internal) {
for (Light light : lights) {
if (!isShadowed(scene, light, record)) {
L.sub(light.position, record.location);
L.normalize();
double dot = L.dot(record.normal);
if (dot > 0) {
outColor.r += dot * light.intensity.r * diffuseColor.r;
outColor.g += dot * light.intensity.g * diffuseColor.g;
outColor.b += dot * light.intensity.b * diffuseColor.b;
}
H.set(L);
H.add(toEye);
H.normalize();
dot = H.dot(record.normal);
if (dot > 0) {
dot = Math.pow(dot, exponent);
outColor.r += dot * light.intensity.r * specularColor.r;
outColor.g += dot * light.intensity.g * specularColor.g;
outColor.b += dot * light.intensity.b * specularColor.b;
}
}
}
}