/**
* The MIT License (MIT)
*
* Copyright (c) 2015 Tyler Bucher
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package org.ajgl.math.matrix;
import org.ajgl.math.vector.Vector3b;
import org.lwjgl.system.MemoryUtil;
/**
* This class is designed to be a 3x3 matrix.
* @author Tyler Bucher
*/
public class Matrix3b extends Matrix2b {
public byte /*m00, m01,*/ m02; // First row
public byte /*m10, m11,*/ m12; // Second row
public byte m20, m21, m22; // Third row
/**
* Default Matrix constructor.
*/
public Matrix3b() {
this.loadIdentity();
buffer = MemoryUtil.memAlloc(9);
updateBuffer();
}
/**
* Copies a matrix to this matrix.
* @param matrix - Matrix to be copied.
*/
public Matrix3b(Matrix3b matrix) {
Matrix3b.copyMatrix(matrix, this);
buffer = MemoryUtil.memAlloc(9);
updateBuffer();
}
/**
* Loads the identity matrix.
*/
@Override
public Matrix3b loadIdentity() {
super.loadIdentity(); m02 = 0;
m12 = 0;
m20 = 0; m21 = 0; m22 = 1;
return this;
}
/**
* Adds a matrix to this matrix.
* @param matrix - Matrix to be added.
* @return This matrix.
*/
public Matrix3b add(Matrix3b matrix) {
super.add(matrix); m02 += matrix.m02;
m12 += matrix.m12;
m20 += matrix.m20; m21 += matrix.m21; m22 += matrix.m22;
return this;
}
/**
* Subtracts a matrix from this matrix.
* @param matrix - Matrix to be subtracted.
* @return This matrix.
*/
public Matrix3b subtract(Matrix3b matrix) {
super.subtract(matrix); m02 -= matrix.m02;
m12 -= matrix.m12;
m20 -= matrix.m20; m21 -= matrix.m21; m22 -= matrix.m22;
return this;
}
/**
* Multiplies this matrix by another matrix.
* @param matrix - Matrix to be multiplied.
* @return This Matrix.
*/
public Matrix3b multiply(Matrix3b matrix) {
Matrix3b orig = new Matrix3b(this);
m00 = (byte) ((orig.m00*matrix.m00)+(orig.m01*matrix.m10)+(orig.m02*matrix.m20));
m10 = (byte) ((orig.m10*matrix.m00)+(orig.m11*matrix.m10)+(orig.m12*matrix.m20));
m20 = (byte) ((orig.m20*matrix.m00)+(orig.m21*matrix.m10)+(orig.m22*matrix.m20));
m01 = (byte) ((orig.m00*matrix.m01)+(orig.m01*matrix.m11)+(orig.m02*matrix.m21));
m11 = (byte) ((orig.m10*matrix.m01)+(orig.m11*matrix.m11)+(orig.m12*matrix.m21));
m21 = (byte) ((orig.m20*matrix.m01)+(orig.m21*matrix.m11)+(orig.m22*matrix.m21));
m02 = (byte) ((orig.m00*matrix.m02)+(orig.m01*matrix.m12)+(orig.m02*matrix.m22));
m12 = (byte) ((orig.m10*matrix.m02)+(orig.m11*matrix.m12)+(orig.m12*matrix.m22));
m22 = (byte) ((orig.m20*matrix.m02)+(orig.m21*matrix.m12)+(orig.m22*matrix.m22));
return this;
}
/**
* Multiplies this matrix by a scalar value.
*/
@Override
public Matrix3b multiply(byte value) {
super.multiply(value); m02 *= value;
m12 *= value;
m20 *= value; m21 *= value; m22 *= value;
return this;
}
/**
* Divides this matrix by a scalar value.
*/
@Override
public Matrix3b divide(byte value) {
super.divide(value); m02 /= value;
m12 /= value;
m20 /= value; m21 /= value; m22 /= value;
return this;
}
/**
* Negates this matrix.
*/
@Override
public Matrix3b negate() {
return this.multiply((byte) -1);
}
/**
* Updates the buffer version of this matrix.
*/
@Override
public void updateBuffer() {
buffer.clear();
buffer.put(m00).put(m10).put(m20)
.put(m01).put(m11).put(m21)
.put(m02).put(m12).put(m22);
buffer.flip();
}
/**
* Creates a matrix by four vectors.
* @param col1 - First column.
* @param col2 - Second column.
* @param col3 - Third column.
* @return The new matrix.
*/
public static Matrix3b createMatrix(Vector3b col1, Vector3b col2, Vector3b col3) {
Matrix3b matrix = new Matrix3b();
matrix.m00 = col1.x; matrix.m01 = col2.x; matrix.m02 = col3.x;
matrix.m10 = col1.y; matrix.m11 = col2.y; matrix.m12 = col3.y;
matrix.m20 = col1.z; matrix.m21 = col2.z; matrix.m22 = col3.z;
return matrix;
}
/**
* Copies a matrix.
* @param src - Source matrix.
* @param des - destination matrix.
* @return The destination matrix.
*/
public static Matrix3b copyMatrix(Matrix3b src, Matrix3b des) {
des.m00 = src.m00; des.m01 = src.m01; des.m02 = src.m02;
des.m10 = src.m10; des.m11 = src.m11; des.m12 = src.m12;
des.m20 = src.m20; des.m21 = src.m21; des.m22 = src.m22;
return des;
}
@Override
public String toString() {
return "Matrix3b [m00=" + m00 + ", m01=" + m01 + ", m02=" + m02 + ",\n" +
" m10=" + m10 + ", m11=" + m11 + ", m12=" + m12 + ",\n" +
" m20=" + m20 + ", m21=" + m21 + ", m22=" + m22 + "]";
}
@Override
protected void finalize() {
MemoryUtil.memFree(buffer);
}
}