@Override
public boolean shadow_hit(Ray ray, FloatRef tmin) {
Ray inv_ray =
new Ray(
invTransform.transformPoint(ray.getOrigin()),
invTransform.transformDirection(ray.getDirection()));
return object.shadow_hit(inv_ray, tmin);
}
@Override
public boolean hit(Ray ray, ShadeRec sr, FloatRef tmin) {
Ray inv_ray =
new Ray(
invTransform.transformPoint(ray.getOrigin()),
invTransform.transformDirection(ray.getDirection()));
if (object.hit(inv_ray, sr, tmin)) {
Matrix4 transform = Matrix4.inverse(invTransform);
sr.worldHitPoint = transform.transformPoint(sr.worldHitPoint);
sr.normal = invTransform.transformNormal(sr.normal);
return true;
}
return false;
}
public Instance scale(float x, float y, float z) {
invTransform.multiply(Matrix4.newInvScale(x, y, z));
return this;
}
public Instance rotateZ(float angle) {
invTransform.multiply(Matrix4.newInvRotationZ(angle));
return this;
}
public Instance translate(Vector3 position) {
invTransform.multiply(Matrix4.newInvTranslation(position));
return this;
}
public Instance translate(float x, float y, float z) {
invTransform.multiply(Matrix4.newInvTranslation(x, y, z));
return this;
}
public class Instance implements GeometricObject {
private GeometricObject object;
private Material material;
private Matrix4 invTransform = Matrix4.newIdentity();
public Instance(GeometricObject object) {
this(object, null);
}
public Instance(GeometricObject object, Material material) {
this.object = object;
this.material = material;
}
public void setObject(GeometricObject object) {
this.object = object;
}
@Override
public boolean hit(Ray ray, ShadeRec sr, FloatRef tmin) {
Ray inv_ray =
new Ray(
invTransform.transformPoint(ray.getOrigin()),
invTransform.transformDirection(ray.getDirection()));
if (object.hit(inv_ray, sr, tmin)) {
Matrix4 transform = Matrix4.inverse(invTransform);
sr.worldHitPoint = transform.transformPoint(sr.worldHitPoint);
sr.normal = invTransform.transformNormal(sr.normal);
return true;
}
return false;
}
@Override
public boolean shadow_hit(Ray ray, FloatRef tmin) {
Ray inv_ray =
new Ray(
invTransform.transformPoint(ray.getOrigin()),
invTransform.transformDirection(ray.getDirection()));
return object.shadow_hit(inv_ray, tmin);
}
@Override
public Material getMaterial() {
return material != null ? material : object.getMaterial();
}
public Instance translate(float x, float y, float z) {
invTransform.multiply(Matrix4.newInvTranslation(x, y, z));
return this;
}
public Instance translate(Vector3 position) {
invTransform.multiply(Matrix4.newInvTranslation(position));
return this;
}
public Instance rotateX(float angle) {
invTransform.multiply(Matrix4.newInvRotationX(angle));
return this;
}
public Instance rotateY(float angle) {
invTransform.multiply(Matrix4.newInvRotationY(angle));
return this;
}
public Instance rotateZ(float angle) {
invTransform.multiply(Matrix4.newInvRotationZ(angle));
return this;
}
public Instance scale(float x, float y, float z) {
invTransform.multiply(Matrix4.newInvScale(x, y, z));
return this;
}
public Instance scale(float scale) {
invTransform.multiply(Matrix4.newInvScale(scale));
return this;
}
public void setMaterial(Material material) {
this.material = material;
}
@Override
public Instance clone() {
Instance instance = new Instance(object, material.clone());
instance.invTransform = invTransform.clone();
return instance;
}
}
@Override
public Instance clone() {
Instance instance = new Instance(object, material.clone());
instance.invTransform = invTransform.clone();
return instance;
}
public Instance scale(float scale) {
invTransform.multiply(Matrix4.newInvScale(scale));
return this;
}