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package bezier.geom.transform;
import bezier.geom.Matrix;
import bezier.geom.TDHPoint;
/**
* 2D homogenous transform defined by a matrix.
*
* @author bjculkin
*
*/
public class TDHMatrixTransform implements TDHTransform {
/**
* The matrix for the transform.
*/
public final Matrix mat;
/**
* Create a new matrix-based transform.
*
* @param mat
* The matrix that defines the transform.
*/
public TDHMatrixTransform(Matrix mat) {
this.mat = mat;
}
/**
* Create a new matrix-based transform.
*
* @param mat
* The matrix that defines the transform.
*/
public TDHMatrixTransform(double[][] mat) {
this.mat = new Matrix(mat);
}
@Override
public TDHTransformType type() {
return TDHTransformType.MATRIX;
}
@Override
public TDHPoint transform(TDHPoint punkt) {
double[] mult = mat.scalarMultiply(new double[] { punkt.x, punkt.y, punkt.z });
return new TDHPoint(mult[0], mult[1], mult[2]);
}
/**
* Chain two matrix transforms together.
*
* @param trans
* The next transform to use.
* @return A transform that represents the two transforms in serial.
*/
public TDHTransform then(TDHMatrixTransform trans) {
return new TDHMatrixTransform(mat.multiply(trans.mat));
}
}
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