AffineMN.java

package mikera.transformz;

import mikera.matrixx.AMatrix;
import mikera.vectorz.AVector;

/**
 * General purpose MxN affine transformation, composed of a matrix and translation.
 * 
 * @author Mike
 */
public final class AffineMN extends AAffineTransform {
	private final AMatrix matrix;
	private final ATranslation translation;
	private final int inputDimensions;
	private final int outputDimensions;
	
	public AffineMN(AMatrix matrix, ATranslation translation) {
		this.matrix=matrix;
		this.translation=translation;
		inputDimensions=matrix.columnCount();
		outputDimensions=matrix.rowCount();
		if (outputDimensions!=translation.inputDimensions()) {
			throw new IllegalArgumentException("matrix and translation have incompatible dimensionality");
		}
	}

	public AffineMN(AAffineTransform at) {
		this(at.getMatrix().toMutableMatrix(),at.getTranslation().toMutableTranslation());
	}

	public AffineMN(AMatrix m, AVector v) {
		this(m,Transformz.createTranslation(v));
	}

	@Override
	public void composeWith(ATransform trans) {
		if (trans instanceof AffineMN) {
			composeWith((AffineMN)trans);
			return;
		}
		super.composeWith(trans);
	}
	
	public void composeWith(AffineMN trans) {
		super.composeWith(trans);
	}

	@Override
	public AMatrix getMatrix() {
		return matrix;
	}

	@Override
	public ATranslation getTranslation() {
		return translation;
	}

	@Override
	public void transform(AVector source, AVector dest) {
		matrix.transform(source,dest);
		translation.transformInPlace(dest);
	}

	@Override
	public int inputDimensions() {
		return inputDimensions;
	}

	@Override
	public int outputDimensions() {
		return outputDimensions;
	}

}