/// Casts a ray and checks if it intersects any object. We can then
/// compute the color of the point corresponding to the closest
/// intersected object.
private Color Raycast(Ray ray)
{
Object3D collidedObj = ray.ClosestIntersectedObject(Scene.Objects);
// If the ray previously encountered an object, compute the pixel's
// color.
if (collidedObj != null) {
V3 collisionPoint = ray.CollisionPoint();
V2 collisionUV = collidedObj.UV(collisionPoint);
float shadowCoeff = Occultation(collidedObj, collisionPoint);
return shadowCoeff * Scene.IlluModel.Compute(
Scene.Lights, collidedObj, collisionPoint, collisionUV
);
}
return null;
}
/// Casts a ray and checks if it intersects any object. We can then
/// compute the color of the point corresponding to the closest
/// intersected object.
private Color Raycast(Ray ray)
{
Object3D collidedObj = ray.ClosestIntersectedObject(Scene.Objects);
// If the ray previously encountered an object, compute the pixel's
// color.
if (collidedObj != null)
{
V3 collisionPoint = ray.CollisionPoint();
V2 collisionUV = collidedObj.UV(collisionPoint);
float shadowCoeff = Occultation(collidedObj, collisionPoint);
return(shadowCoeff * Scene.IlluModel.Compute(
Scene.Lights, collidedObj, collisionPoint, collisionUV
));
}
return(null);
}
/// Casts a ray and checks if it intersects any object. We can then
/// compute the color of the point corresponding to the closest
/// intersected object. If the intersected object is transparent or
/// reflective, new rays are cast from the collision point.
private Color Raytrace(Ray ray, int depth)
{
if (depth <= 0)
{
return(null);
}
Object3D collidedObj = ray.ClosestIntersectedObject(Scene.Objects);
// If the ray previously encountered an object, compute the pixel's
// color.
if (collidedObj != null)
{
V3 collisionPoint = ray.CollisionPoint();
V2 collisionUV = collidedObj.UV(collisionPoint);
float shadowCoeff = Occultation(collidedObj, collisionPoint);
Color directComponent = Scene.IlluModel.Compute(
Scene.Lights, collidedObj, collisionPoint, collisionUV
);
// reflected light component
Color reflectionColor = ReflectionColor(
-ray.Direction, collisionPoint, collisionUV,
collidedObj, depth
);
// refracted light component
Color refractionColor = RefractionColor(
ray.Direction, collisionPoint, collisionUV,
collidedObj, depth
);
return(shadowCoeff * (
directComponent + reflectionColor + refractionColor
));
}
return(null);
}
/// Casts a ray and checks if it intersects any object. We can then
/// compute the color of the point corresponding to the closest
/// intersected object. If the intersected object is transparent or
/// reflective, new rays are cast from the collision point.
private Color Raytrace(Ray ray, int depth)
{
if (depth <= 0) { return null; }
Object3D collidedObj = ray.ClosestIntersectedObject(Scene.Objects);
// If the ray previously encountered an object, compute the pixel's
// color.
if (collidedObj != null) {
V3 collisionPoint = ray.CollisionPoint();
V2 collisionUV = collidedObj.UV(collisionPoint);
float shadowCoeff = Occultation(collidedObj, collisionPoint);
Color directComponent = Scene.IlluModel.Compute(
Scene.Lights, collidedObj, collisionPoint, collisionUV
);
// reflected light component
Color reflectionColor = ReflectionColor(
-ray.Direction, collisionPoint, collisionUV,
collidedObj, depth
);
// refracted light component
Color refractionColor = RefractionColor(
ray.Direction, collisionPoint, collisionUV,
collidedObj, depth
);
return shadowCoeff * (
directComponent + reflectionColor + refractionColor
);
}
return null;
}