/* * $RCSfile$ * * Copyright (c) 2004 Sun Microsystems, Inc. All rights reserved. * * Use is subject to license terms. * * $Revision$ * $Date$ * $State$ */ package javax.vecmath; import java.lang.Math; /** * A double precision, general, dynamically-resizable, * two-dimensional matrix class. Row and column numbering begins with * zero. The representation is row major. */ public class GMatrix implements java.io.Serializable, Cloneable { // Compatible with 1.1 static final long serialVersionUID = 2777097312029690941L; private static final boolean debug = false; int nRow; int nCol; // double dereference is slow double[][] values; private static final double EPS = 1.0E-10; /** * Constructs an nRow by NCol identity matrix. * Note that because row and column numbering begins with * zero, nRow and nCol will be one larger than the maximum * possible matrix index values. * @param nRow number of rows in this matrix. * @param nCol number of columns in this matrix. */ public GMatrix(int nRow, int nCol) { values = new double[nRow][nCol]; this.nRow = nRow; this.nCol = nCol; int i, j; for (i = 0; i < nRow; i++) { for (j = 0; j < nCol; j++) { values[i][j] = 0.0; } } int l; if (nRow < nCol) l = nRow; else l = nCol; for (i = 0; i < l; i++) { values[i][i] = 1.0; } } /** * Constructs an nRow by nCol matrix initialized to the values * in the matrix array. The array values are copied in one row at * a time in row major fashion. The array should be at least * nRow*nCol in length. * Note that because row and column numbering begins with * zero, nRow and nCol will be one larger than the maximum * possible matrix index values. * @param nRow number of rows in this matrix. * @param nCol number of columns in this matrix. * @param matrix a 1D array that specifies a matrix in row major fashion */ public GMatrix(int nRow, int nCol, double[] matrix) { values = new double[nRow][nCol]; this.nRow = nRow; this.nCol = nCol; int i, j; for (i = 0; i < nRow; i++) { for (j = 0; j < nCol; j++) { values[i][j] = matrix[i*nCol+j]; } } } /** * Constructs a new GMatrix and copies the initial values * from the parameter matrix. * @param matrix the source of the initial values of the new GMatrix */ public GMatrix(GMatrix matrix) { nRow = matrix.nRow; nCol = matrix.nCol; values = new double[nRow][nCol]; int i, j; for (i = 0; i < nRow; i++) { for (j = 0; j < nCol; j++) { values[i][j] = matrix.values[i][j]; } } } /** * Sets the value of this matrix to the result of multiplying itself * with matrix m1 (this = this * m1). * @param m1 the other matrix */ public final void mul(GMatrix m1) { int i, j, k; if (nCol != m1.nRow || nCol != m1.nCol) throw new MismatchedSizeException (VecMathI18N.getString("GMatrix0")); double [][] tmp = new double[nRow][nCol]; for (i = 0; i < nRow; i++) { for (j = 0; j < nCol; j++) { tmp[i][j] = 0.0; for (k = 0; k < nCol; k++) { tmp[i][j] += values[i][k]*m1.values[k][j]; } } } values = tmp; } /** * Sets the value of this matrix to the result of multiplying * the two argument matrices together (this = m1 * m2). * @param m1 the first matrix * @param m2 the second matrix */ public final void mul(GMatrix m1, GMatrix m2) { int i, j, k; if (m1.nCol != m2.nRow || nRow != m1.nRow || nCol != m2.nCol) throw new MismatchedSizeException (VecMathI18N.getString("GMatrix1")); double[][] tmp = new double[nRow][nCol]; for (i = 0; i < m1.nRow; i++) { for (j = 0; j < m2.nCol; j++) { tmp[i][j] = 0.0; for (k = 0; k < m1.nCol; k++) { tmp[i][j] += m1.values[i][k]*m2.values[k][j]; } } } values = tmp; } /** * Computes the outer product of the two vectors; multiplies the * the first vector by the transpose of the second vector and places * the matrix result into this matrix. This matrix must be * be as big or bigger than getSize(v1)xgetSize(v2). * @param v1 the first vector, treated as a row vector * @param v2 the second vector, treated as a column vector */ public final void mul(GVector v1, GVector v2) { int i, j; if (nRow < v1.getSize()) throw new MismatchedSizeException (VecMathI18N.getString("GMatrix2")); if (nCol < v2.getSize()) throw new MismatchedSizeException (VecMathI18N.getString("GMatrix3")); for (i = 0; i < v1.getSize(); i++ ) { for (j = 0; j < v2.getSize(); j++ ) { values[i][j] = v1.values[i]*v2.values[j]; } } } /** * Sets the value of this matrix to sum of itself and matrix m1. * @param m1 the other matrix */ public final void add(GMatrix m1) { int i, j; if (nRow != m1.nRow) throw new MismatchedSizeException (VecMathI18N.getString("GMatrix4")); if (nCol != m1.nCol) throw new MismatchedSizeException (VecMathI18N.getString("GMatrix5")); for (i = 0; i < nRow; i++) { for (j = 0; j < nCol; j++) { values[i][j] = values[i][j] + m1.values[i][j]; } } } /** * Sets the value of this matrix to the matrix sum of matrices m1 and m2. * @param m1 the first matrix * @param m2 the second matrix */ public final void add(GMatrix m1, GMatrix m2) { int i, j; if (m2.nRow != m1.nRow) throw new MismatchedSizeException (VecMathI18N.getString("GMatrix6")); if (m2.nCol != m1.nCol) throw new MismatchedSizeException (VecMathI18N.getString("GMatrix7")); if (nCol != m1.nCol || nRow != m1.nRow) throw new MismatchedSizeException (VecMathI18N.getString("GMatrix8")); for (i = 0; i < nRow; i++) { for (j = 0; j < nCol; j++) { values[i][j] = m1.values[i][j] + m2.values[i][j]; } } } /** * Sets the value of this matrix to the matrix difference of itself * and matrix m1 (this = this - m1). * @param m1 the other matrix */ public final void sub(GMatrix m1) { int i, j; if (nRow != m1.nRow) throw new MismatchedSizeException (VecMathI18N.getString("GMatrix9")); if (nCol != m1.nCol) throw new MismatchedSizeException (VecMathI18N.getString("GMatrix28")); for (i = 0; i < nRow; i++) { for (j = 0; j < nCol; j++) { values[i][j] = values[i][j] - m1.values[i][j]; } } } /** * Sets the value of this matrix to the matrix difference * of matrices m1 and m2 (this = m1 - m2). * @param m1 the first matrix * @param m2 the second matrix */ public final void sub(GMatrix m1, GMatrix m2) { int i, j; if (m2.nRow != m1.nRow) throw new MismatchedSizeException (VecMathI18N.getString("GMatrix10")); if (m2.nCol != m1.nCol) throw new MismatchedSizeException (VecMathI18N.getString("GMatrix11")); if (nRow != m1.nRow || nCol != m1.nCol) throw new MismatchedSizeException (VecMathI18N.getString("GMatrix12")); for (i = 0; i < nRow; i++) { for (j = 0; j < nCol; j++) { values[i][j] = m1.values[i][j] - m2.values[i][j]; } } } /** * Negates the value of this matrix: this = -this. */ public final void negate() { int i, j; for (i = 0; i < nRow; i++) { for (j = 0;j < nCol; j++) { values[i][j] = -values[i][j]; } } } /** * Sets the value of this matrix equal to the negation of * of the GMatrix parameter. * @param m1 The source matrix */ public final void negate(GMatrix m1) { int i, j; if (nRow != m1.nRow || nCol != m1.nCol) throw new MismatchedSizeException (VecMathI18N.getString("GMatrix13")); for (i = 0; i < nRow; i++) { for (j = 0; j < nCol; j++) { values[i][j] = -m1.values[i][j]; } } } /** * Sets this GMatrix to the identity matrix. */ public final void setIdentity() { int i, j; for (i = 0; i < nRow; i++) { for (j = 0; j < nCol; j++) { values[i][j] = 0.0; } } int l; if (nRow < nCol) l = nRow; else l = nCol; for (i = 0; i < l; i++) { values[i][i] = 1.0; } } /** * Sets all the values in this matrix to zero. */ public final void setZero() { int i, j; for (i = 0; i < nRow; i++) { for (j = 0; j < nCol; j++) { values[i][j] = 0.0; } } } /** * Subtracts this matrix from the identity matrix and puts the values * back into this (this = I - this). */ public final void identityMinus() { int i, j; for(i = 0; i < nRow; i++) { for(j = 0; j < nCol; j++) { values[i][j] = -values[i][j]; } } int l; if( nRow < nCol) l = nRow; else l = nCol; for(i = 0; i < l; i++) { values[i][i] += 1.0; } } /** * Inverts this matrix in place. */ public final void invert() { invertGeneral(this); } /** * Inverts matrix m1 and places the new values into this matrix. Matrix * m1 is not modified. * @param m1 the matrix to be inverted */ public final void invert(GMatrix m1) { invertGeneral(m1); } /** * Copies a sub-matrix derived from this matrix into the target matrix. * The upper left of the sub-matrix is located at (rowSource, colSource); * the lower right of the sub-matrix is located at * (lastRowSource,lastColSource). The sub-matrix is copied into the * the target matrix starting at (rowDest, colDest). * @param rowSource the top-most row of the sub-matrix * @param colSource the left-most column of the sub-matrix * @param numRow the number of rows in the sub-matrix * @param numCol the number of columns in the sub-matrix * @param rowDest the top-most row of the position of the copied * sub-matrix within the target matrix * @param colDest the left-most column of the position of the copied * sub-matrix within the target matrix * @param target the matrix into which the sub-matrix will be copied */ public final void copySubMatrix(int rowSource, int colSource, int numRow, int numCol, int rowDest, int colDest, GMatrix target) { int i, j; if (this != target) { for (i = 0; i < numRow; i++) { for (j = 0; j < numCol; j++) { target.values[rowDest+i][colDest+j] = values[rowSource+i][colSource+j]; } } } else { double[][] tmp = new double[numRow][numCol]; for (i = 0; i < numRow; i++) { for (j = 0; j < numCol; j++) { tmp[i][j] = values[rowSource+i][colSource+j]; } } for (i = 0; i < numRow; i++) { for (j = 0; j < numCol; j++) { target.values[rowDest+i][colDest+j] = tmp[i][j]; } } } } /** * Changes the size of this matrix dynamically. If the size is increased * no data values will be lost. If the size is decreased, only those data * values whose matrix positions were eliminated will be lost. * @param nRow number of desired rows in this matrix * @param nCol number of desired columns in this matrix */ public final void setSize(int nRow, int nCol) { double[][] tmp = new double[nRow][nCol]; int i, j, maxRow, maxCol; if (this.nRow < nRow) maxRow = this.nRow; else maxRow = nRow; if (this.nCol < nCol) maxCol = this.nCol; else maxCol = nCol; for (i = 0; i < maxRow; i++) { for (j = 0; j < maxCol; j++) { tmp[i][j] = values[i][j]; } } this.nRow = nRow; this.nCol = nCol; values = tmp; } /** * Sets the value of this matrix to the values found in the array parameter. * The values are copied in one row at a time, in row major * fashion. The array should be at least equal in length to * the number of matrix rows times the number of matrix columns * in this matrix. * @param matrix the row major source array */ public final void set(double[] matrix) { int i, j; for (i = 0; i < nRow; i++) { for (j = 0; j < nCol; j++) { values[i][j] = matrix[nCol*i+j]; } } } /** * Sets the value of this matrix to that of the Matrix3f provided. * @param m1 the matrix */ public final void set(Matrix3f m1) { int i, j; if (nCol < 3 || nRow < 3) { // expand matrix if too small nCol = 3; nRow = 3; values = new double[nRow][nCol]; } values[0][0] = m1.m00; values[0][1] = m1.m01; values[0][2] = m1.m02; values[1][0] = m1.m10; values[1][1] = m1.m11; values[1][2] = m1.m12; values[2][0] = m1.m20; values[2][1] = m1.m21; values[2][2] = m1.m22; for (i = 3; i < nRow; i++) { // pad rest or matrix with zeros for (j = 3; j < nCol; j++) { values[i][j] = 0.0; } } } /** * Sets the value of this matrix to that of the Matrix3d provided. * @param m1 the matrix */ public final void set(Matrix3d m1) { if (nRow < 3 || nCol < 3) { values = new double[3][3]; nRow = 3; nCol = 3; } values[0][0] = m1.m00; values[0][1] = m1.m01; values[0][2] = m1.m02; values[1][0] = m1.m10; values[1][1] = m1.m11; values[1][2] = m1.m12; values[2][0] = m1.m20; values[2][1] = m1.m21; values[2][2] = m1.m22; for (int i = 3; i < nRow; i++) { // pad rest or matrix with zeros for(int j = 3; j < nCol; j++) { values[i][j] = 0.0; } } } /** * Sets the value of this matrix to that of the Matrix4f provided. * @param m1 the matrix */ public final void set(Matrix4f m1) { if (nRow < 4 || nCol < 4) { values = new double[4][4]; nRow = 4; nCol = 4; } values[0][0] = m1.m00; values[0][1] = m1.m01; values[0][2] = m1.m02; values[0][3] = m1.m03; values[1][0] = m1.m10; values[1][1] = m1.m11; values[1][2] = m1.m12; values[1][3] = m1.m13; values[2][0] = m1.m20; values[2][1] = m1.m21; values[2][2] = m1.m22; values[2][3] = m1.m23; values[3][0] = m1.m30; values[3][1] = m1.m31; values[3][2] = m1.m32; values[3][3] = m1.m33; for (int i = 4 ; i < nRow; i++) { // pad rest or matrix with zeros for (int j = 4; j < nCol; j++) { values[i][j] = 0.0; } } } /** * Sets the value of this matrix to that of the Matrix4d provided. * @param m1 the matrix */ public final void set(Matrix4d m1) { if (nRow < 4 || nCol < 4) { values = new double[4][4]; nRow = 4; nCol = 4; } values[0][0] = m1.m00; values[0][1] = m1.m01; values[0][2] = m1.m02; values[0][3] = m1.m03; values[1][0] = m1.m10; values[1][1] = m1.m11; values[1][2] = m1.m12; values[1][3] = m1.m13; values[2][0] = m1.m20; values[2][1] = m1.m21; values[2][2] = m1.m22; values[2][3] = m1.m23; values[3][0] = m1.m30; values[3][1] = m1.m31; values[3][2] = m1.m32; values[3][3] = m1.m33; for (int i = 4; i < nRow; i++) { // pad rest or matrix with zeros for (int j = 4; j < nCol; j++) { values[i][j] = 0.0; } } } /** * Sets the value of this matrix to the values found in matrix m1. * @param m1 the source matrix */ public final void set(GMatrix m1) { int i, j; if (nRow < m1.nRow || nCol < m1.nCol) { nRow = m1.nRow; nCol = m1.nCol; values = new double[nRow][nCol]; } for (i = 0; i < Math.min(nRow, m1.nRow); i++) { for (j = 0; j < Math.min(nCol, m1.nCol); j++) { values[i][j] = m1.values[i][j]; } } for (i = m1.nRow; i < nRow; i++) { // pad rest or matrix with zeros for (j = m1.nCol; j < nCol; j++) { values[i][j] = 0.0; } } } /** * Returns the number of rows in this matrix. * @return number of rows in this matrix */ public final int getNumRow() { return(nRow); } /** * Returns the number of colmuns in this matrix. * @return number of columns in this matrix */ public final int getNumCol() { return(nCol); } /** * Retrieves the value at the specified row and column of this matrix. * @param row the row number to be retrieved (zero indexed) * @param column the column number to be retrieved (zero indexed) * @return the value at the indexed element */ public final double getElement(int row, int column) { return(values[row][column]); } /** * Modifies the value at the specified row and column of this matrix. * @param row the row number to be modified (zero indexed) * @param column the column number to be modified (zero indexed) * @param value the new matrix element value */ public final void setElement(int row, int column, double value) { values[row][column] = value; } /** * Places the values of the specified row into the array parameter. * @param row the target row number * @param array the array into which the row values will be placed */ public final void getRow(int row, double[] array) { for (int i = 0; i < nCol; i++) { array[i] = values[row][i]; } } /** * Places the values of the specified row into the vector parameter. * @param row the target row number * @param vector the vector into which the row values will be placed */ public final void getRow(int row, GVector vector) { if (vector.getSize() < nCol) vector.setSize(nCol); for (int i = 0; i < nCol; i++) { vector.values[i] = values[row][i]; } } /** * Places the values of the specified column into the array parameter. * @param col the target column number * @param array the array into which the column values will be placed */ public final void getColumn(int col, double[] array) { for (int i = 0; i < nRow; i++) { array[i] = values[i][col]; } } /** * Places the values of the specified column into the vector parameter. * @param col the target column number * @param vector the vector into which the column values will be placed */ public final void getColumn(int col, GVector vector) { if (vector.getSize() < nRow) vector.setSize(nRow); for (int i = 0; i < nRow; i++) { vector.values[i] = values[i][col]; } } /** * Places the values in the upper 3x3 of this GMatrix into * the matrix m1. * @param m1 The matrix that will hold the new values */ public final void get(Matrix3d m1) { if (nRow < 3 || nCol < 3) { m1.setZero(); if (nCol > 0) { if (nRow > 0){ m1.m00 = values[0][0]; if (nRow > 1){ m1.m10 = values[1][0]; if( nRow > 2 ){ m1.m20= values[2][0]; } } } if (nCol > 1) { if (nRow > 0) { m1.m01 = values[0][1]; if (nRow > 1){ m1.m11 = values[1][1]; if (nRow > 2){ m1.m21 = values[2][1]; } } } if (nCol > 2) { if (nRow > 0) { m1.m02 = values[0][2]; if (nRow > 1) { m1.m12 = values[1][2]; if (nRow > 2) { m1.m22 = values[2][2]; } } } } } } } else { m1.m00 = values[0][0]; m1.m01 = values[0][1]; m1.m02 = values[0][2]; m1.m10 = values[1][0]; m1.m11 = values[1][1]; m1.m12 = values[1][2]; m1.m20 = values[2][0]; m1.m21 = values[2][1]; m1.m22 = values[2][2]; } } /** * Places the values in the upper 3x3 of this GMatrix into * the matrix m1. * @param m1 The matrix that will hold the new values */ public final void get(Matrix3f m1) { if (nRow < 3 || nCol < 3) { m1.setZero(); if (nCol > 0) { if (nRow > 0) { m1.m00 = (float)values[0][0]; if (nRow > 1) { m1.m10 = (float)values[1][0]; if (nRow > 2) { m1.m20 = (float)values[2][0]; } } } if (nCol > 1) { if (nRow > 0) { m1.m01 = (float)values[0][1]; if (nRow > 1){ m1.m11 = (float)values[1][1]; if (nRow > 2){ m1.m21 = (float)values[2][1]; } } } if (nCol > 2) { if (nRow > 0) { m1.m02 = (float)values[0][2]; if (nRow > 1) { m1.m12 = (float)values[1][2]; if (nRow > 2) { m1.m22 = (float)values[2][2]; } } } } } } } else { m1.m00 = (float)values[0][0]; m1.m01 = (float)values[0][1]; m1.m02 = (float)values[0][2]; m1.m10 = (float)values[1][0]; m1.m11 = (float)values[1][1]; m1.m12 = (float)values[1][2]; m1.m20 = (float)values[2][0]; m1.m21 = (float)values[2][1]; m1.m22 = (float)values[2][2]; } } /** * Places the values in the upper 4x4 of this GMatrix into * the matrix m1. * @param m1 The matrix that will hold the new values */ public final void get(Matrix4d m1) { if (nRow < 4 || nCol < 4) { m1.setZero(); if (nCol > 0) { if (nRow > 0) { m1.m00 = values[0][0]; if (nRow > 1) { m1.m10 = values[1][0]; if (nRow > 2) { m1.m20 = values[2][0]; if (nRow > 3) { m1.m30 = values[3][0]; } } } } if (nCol > 1) { if (nRow > 0) { m1.m01 = values[0][1]; if (nRow > 1) { m1.m11 = values[1][1]; if (nRow > 2) { m1.m21 = values[2][1]; if (nRow > 3) { m1.m31 = values[3][1]; } } } } if (nCol > 2) { if (nRow > 0) { m1.m02 = values[0][2]; if (nRow > 1) { m1.m12 = values[1][2]; if (nRow > 2) { m1.m22 = values[2][2]; if (nRow > 3) { m1.m32 = values[3][2]; } } } } if (nCol > 3) { if (nRow > 0) { m1.m03 = values[0][3]; if (nRow > 1) { m1.m13 = values[1][3]; if (nRow > 2) { m1.m23 = values[2][3]; if (nRow > 3) { m1.m33 = values[3][3]; } } } } } } } } } else { m1.m00 = values[0][0]; m1.m01 = values[0][1]; m1.m02 = values[0][2]; m1.m03 = values[0][3]; m1.m10 = values[1][0]; m1.m11 = values[1][1]; m1.m12 = values[1][2]; m1.m13 = values[1][3]; m1.m20 = values[2][0]; m1.m21 = values[2][1]; m1.m22 = values[2][2]; m1.m23 = values[2][3]; m1.m30 = values[3][0]; m1.m31 = values[3][1]; m1.m32 = values[3][2]; m1.m33 = values[3][3]; } } /** * Places the values in the upper 4x4 of this GMatrix into * the matrix m1. * @param m1 The matrix that will hold the new values */ public final void get(Matrix4f m1) { if (nRow < 4 || nCol < 4) { m1.setZero(); if (nCol > 0) { if (nRow > 0) { m1.m00 = (float)values[0][0]; if (nRow > 1) { m1.m10 = (float)values[1][0]; if (nRow > 2) { m1.m20 = (float)values[2][0]; if (nRow > 3) { m1.m30 = (float)values[3][0]; } } } } if (nCol > 1) { if (nRow > 0) { m1.m01 = (float)values[0][1]; if (nRow > 1) { m1.m11 = (float)values[1][1]; if (nRow > 2) { m1.m21 = (float)values[2][1]; if (nRow > 3) { m1.m31 = (float)values[3][1]; } } } } if (nCol > 2) { if (nRow > 0) { m1.m02 = (float)values[0][2]; if (nRow > 1) { m1.m12 = (float)values[1][2]; if (nRow > 2) { m1.m22 = (float)values[2][2]; if (nRow > 3) { m1.m32 = (float)values[3][2]; } } } } if (nCol > 3) { if (nRow > 0) { m1.m03 = (float)values[0][3]; if (nRow > 1) { m1.m13 = (float)values[1][3]; if (nRow > 2) { m1.m23 = (float)values[2][3]; if (nRow > 3) { m1.m33 = (float)values[3][3]; } } } } } } } } } else { m1.m00 = (float)values[0][0]; m1.m01 = (float)values[0][1]; m1.m02 = (float)values[0][2]; m1.m03 = (float)values[0][3]; m1.m10 = (float)values[1][0]; m1.m11 = (float)values[1][1]; m1.m12 = (float)values[1][2]; m1.m13 = (float)values[1][3]; m1.m20 = (float)values[2][0]; m1.m21 = (float)values[2][1]; m1.m22 = (float)values[2][2]; m1.m23 = (float)values[2][3]; m1.m30 = (float)values[3][0]; m1.m31 = (float)values[3][1]; m1.m32 = (float)values[3][2]; m1.m33 = (float)values[3][3]; } } /** * Places the values in the this GMatrix into the matrix m1; * m1 should be at least as large as this GMatrix. * @param m1 The matrix that will hold the new values */ public final void get(GMatrix m1) { int i, j, nc, nr; if (nCol < m1.nCol) nc = nCol; else nc = m1.nCol; if (nRow < m1.nRow) nr = nRow; else nr = m1.nRow; for (i = 0; i < nr; i++) { for (j = 0; j < nc; j++) { m1.values[i][j] = values[i][j]; } } for (i = nr; i < m1.nRow; i++) { for (j = 0; j < m1.nCol; j++) { m1.values[i][j] = 0.0; } } for (j = nc; j < m1.nCol; j++) { for (i = 0; i < nr; i++) { m1.values[i][j] = 0.0; } } } /** * Copy the values from the array into the specified row of this * matrix. * @param row the row of this matrix into which the array values * will be copied. * @param array the source array */ public final void setRow(int row, double[] array) { for (int i = 0; i < nCol; i++) { values[row][i] = array[i]; } } /** * Copy the values from the vector into the specified row of this * matrix. * @param row the row of this matrix into which the array values * will be copied * @param vector the source vector */ public final void setRow(int row, GVector vector) { for(int i = 0; i < nCol; i++) { values[row][i] = vector.values[i]; } } /** * Copy the values from the array into the specified column of this * matrix. * @param col the column of this matrix into which the array values * will be copied * @param array the source array */ public final void setColumn(int col, double[] array) { for(int i = 0; i < nRow; i++) { values[i][col] = array[i]; } } /** * Copy the values from the vector into the specified column of this * matrix. * @param col the column of this matrix into which the array values * will be copied * @param vector the source vector */ public final void setColumn(int col, GVector vector) { for(int i = 0; i < nRow; i++) { values[i][col] = vector.values[i]; } } /** * Multiplies the transpose of matrix m1 times the transpose of matrix * m2, and places the result into this. * @param m1 The matrix on the left hand side of the multiplication * @param m2 The matrix on the right hand side of the multiplication */ public final void mulTransposeBoth(GMatrix m1, GMatrix m2) { int i, j, k; if (m1.nRow != m2.nCol || nRow != m1.nCol || nCol != m2.nRow) throw new MismatchedSizeException (VecMathI18N.getString("GMatrix14")); if (m1 == this || m2 == this) { double[][] tmp = new double[nRow][nCol]; for (i = 0; i < nRow; i++) { for (j = 0; j < nCol; j++) { tmp[i][j] = 0.0; for (k = 0; k < m1.nRow; k++) { tmp[i][j] += m1.values[k][i]*m2.values[j][k]; } } } values = tmp; } else { for (i = 0; i < nRow; i++) { for (j = 0; j < nCol; j++) { values[i][j] = 0.0; for (k = 0; k < m1.nRow; k++) { values[i][j] += m1.values[k][i]*m2.values[j][k]; } } } } } /** * Multiplies matrix m1 times the transpose of matrix m2, and * places the result into this. * @param m1 The matrix on the left hand side of the multiplication * @param m2 The matrix on the right hand side of the multiplication */ public final void mulTransposeRight(GMatrix m1, GMatrix m2) { int i, j, k; if (m1.nCol != m2.nCol || nCol != m2.nRow || nRow != m1.nRow) throw new MismatchedSizeException (VecMathI18N.getString("GMatrix15")); if (m1 == this || m2 == this) { double[][] tmp = new double[nRow][nCol]; for (i = 0; i < nRow; i++) { for (j = 0; j < nCol; j++) { tmp[i][j] = 0.0; for (k = 0; k < m1.nCol; k++) { tmp[i][j] += m1.values[i][k]*m2.values[j][k]; } } } values = tmp; } else { for (i = 0; i < nRow; i++) { for (j = 0;j < nCol; j++) { values[i][j] = 0.0; for (k = 0; k < m1.nCol; k++) { values[i][j] += m1.values[i][k]*m2.values[j][k]; } } } } } /** * Multiplies the transpose of matrix m1 times matrix m2, and * places the result into this. * @param m1 The matrix on the left hand side of the multiplication * @param m2 The matrix on the right hand side of the multiplication */ public final void mulTransposeLeft(GMatrix m1, GMatrix m2) { int i, j, k; if (m1.nRow != m2.nRow || nCol != m2.nCol || nRow != m1.nCol) throw new MismatchedSizeException (VecMathI18N.getString("GMatrix16")); if (m1 == this || m2 == this) { double[][] tmp = new double[nRow][nCol]; for (i = 0; i < nRow; i++) { for (j = 0; j < nCol; j++) { tmp[i][j] = 0.0; for (k = 0; k < m1.nRow; k++) { tmp[i][j] += m1.values[k][i]*m2.values[k][j]; } } } values = tmp; } else { for (i = 0; i < nRow; i++) { for (j = 0; j < nCol; j++) { values[i][j] = 0.0; for (k = 0; k < m1.nRow; k++) { values[i][j] += m1.values[k][i]*m2.values[k][j]; } } } } } /** * Transposes this matrix in place. */ public final void transpose() { int i, j; if (nRow != nCol) { double[][] tmp; i=nRow; nRow = nCol; nCol = i; tmp = new double[nRow][nCol]; for (i = 0; i < nRow; i++) { for (j = 0; j < nCol; j++) { tmp[i][j] = values[j][i]; } } values = tmp; } else { double swap; for (i = 0; i < nRow; i++) { for (j = 0; j < i; j++) { swap = values[i][j]; values[i][j] = values[j][i]; values[j][i] = swap; } } } } /** * Places the matrix values of the transpose of matrix m1 into this matrix. * @param m1 the matrix to be transposed (but not modified) */ public final void transpose(GMatrix m1) { int i, j; if (nRow != m1.nCol || nCol != m1.nRow) throw new MismatchedSizeException (VecMathI18N.getString("GMatrix17")); if (m1 != this) { for (i = 0; i < nRow; i++) { for (j = 0;j < nCol; j++) { values[i][j] = m1.values[j][i]; } } } else { transpose(); } } /** * Returns a string that contains the values of this GMatrix. * @return the String representation */ public String toString() { StringBuffer buffer = new StringBuffer(nRow*nCol*8); int i, j; for (i = 0; i < nRow; i++) { for (j = 0; j < nCol; j++) { buffer.append(values[i][j]).append(" "); } buffer.append("\n"); } return buffer.toString(); } private static void checkMatrix( GMatrix m) { int i, j; for (i = 0; i < m.nRow; i++) { for (j = 0; j < m.nCol; j++) { if (Math.abs(m.values[i][j]) < 0.0000000001) { System.out.print(" 0.0 "); } else { System.out.print(" " + m.values[i][j]); } } System.out.print("\n"); } } /** * Returns a hash code value based on the data values in this * object. Two different GMatrix objects with identical data * values (i.e., GMatrix.equals returns true) will return the * same hash number. Two GMatrix objects with different data * members may return the same hash value, although this is not * likely. * @return the integer hash code value */ public int hashCode() { long bits = 1L; bits = 31L * bits + (long)nRow; bits = 31L * bits + (long)nCol; for (int i = 0; i < nRow; i++) { for (int j = 0; j < nCol; j++) { bits = 31L * bits + VecMathUtil.doubleToLongBits(values[i][j]); } } return (int) (bits ^ (bits >> 32)); } /** * Returns true if all of the data members of GMatrix m1 are * equal to the corresponding data members in this GMatrix. * @param m1 The matrix with which the comparison is made. * @return true or false */ public boolean equals(GMatrix m1) { try { int i, j; if (nRow != m1.nRow || nCol != m1.nCol) return false; for (i = 0;i < nRow; i++) { for (j = 0; j < nCol; j++) { if (values[i][j] != m1.values[i][j]) return false; } } return true; } catch (NullPointerException e2) { return false; } } /** * Returns true if the Object o1 is of type GMatrix and all of the * data members of o1 are equal to the corresponding data members in * this GMatrix. * @param o1 The object with which the comparison is made. * @return true or false */ public boolean equals(Object o1) { try { GMatrix m2 = (GMatrix) o1; int i, j; if (nRow != m2.nRow || nCol != m2.nCol) return false; for (i = 0; i < nRow; i++) { for (j = 0; j < nCol; j++) { if (values[i][j] != m2.values[i][j]) return false; } } return true; } catch (ClassCastException e1) { return false; } catch (NullPointerException e2) { return false; } } /** * @deprecated Use epsilonEquals(GMatrix, double) instead */ public boolean epsilonEquals(GMatrix m1, float epsilon) { return epsilonEquals(m1, (double)epsilon); } /** * Returns true if the L-infinite distance between this matrix * and matrix m1 is less than or equal to the epsilon parameter, * otherwise returns false. The L-infinite * distance is equal to * MAX[i=0,1,2, . . .n ; j=0,1,2, . . .n ; abs(this.m(i,j) - m1.m(i,j)] * @param m1 The matrix to be compared to this matrix * @param epsilon the threshold value */ public boolean epsilonEquals(GMatrix m1, double epsilon) { int i, j; double diff; if (nRow != m1.nRow || nCol != m1.nCol) return false; for (i = 0; i < nRow; i++) { for (j = 0; j < nCol; j++) { diff = values[i][j] - m1.values[i][j]; if ((diff < 0 ? -diff : diff) > epsilon) return false; } } return true; } /** * Returns the trace of this matrix. * @return the trace of this matrix */ public final double trace() { int i, l; double t; if (nRow < nCol) l = nRow; else l = nCol; t = 0.0; for (i = 0; i < l; i++) { t += values[i][i]; } return t; } /** * Finds the singular value decomposition (SVD) of this matrix * such that this = U*W*transpose(V); and returns the rank of * this matrix; the values of U,W,V are all overwritten. Note * that the matrix V is output as V, and * not transpose(V). If this matrix is mxn, then U is mxm, W * is a diagonal matrix that is mxn, and V is nxn. Using the * notation W = diag(w), then the inverse of this matrix is: * inverse(this) = V*diag(1/w)*tranpose(U), where diag(1/w) * is the same matrix as W except that the reciprocal of each * of the diagonal components is used. * @param U The computed U matrix in the equation this = U*W*transpose(V) * @param W The computed W matrix in the equation this = U*W*transpose(V) * @param V The computed V matrix in the equation this = U*W*transpose(V) * @return The rank of this matrix. */ public final int SVD(GMatrix U, GMatrix W, GMatrix V) { // check for consistancy in dimensions if (nCol != V.nCol || nCol != V.nRow) { throw new MismatchedSizeException (VecMathI18N.getString("GMatrix18")); } if (nRow != U.nRow || nRow != U.nCol) { throw new MismatchedSizeException (VecMathI18N.getString("GMatrix25")); } if (nRow != W.nRow || nCol != W.nCol) { throw new MismatchedSizeException (VecMathI18N.getString("GMatrix26")); } // Fix ArrayIndexOutOfBounds for 2x2 matrices, which partially // addresses bug 4348562 for J3D 1.2.1. // // Does *not* fix the following problems reported in 4348562, // which will wait for J3D 1.3: // // 1) no output of W // 2) wrong transposition of U // 3) wrong results for 4x4 matrices // 4) slow performance if (nRow == 2 && nCol == 2) { if (values[1][0] == 0.0) { U.setIdentity(); V.setIdentity(); if (values[0][1] == 0.0) { return 2; } double[] sinl = new double[1]; double[] sinr = new double[1]; double[] cosl = new double[1]; double[] cosr = new double[1]; double[] single_values = new double[2]; single_values[0] = values[0][0]; single_values[1] = values[1][1]; compute_2X2(values[0][0], values[0][1], values[1][1], single_values, sinl, cosl, sinr, cosr, 0); update_u(0, U, cosl, sinl); update_v(0, V, cosr, sinr); return 2; } // else call computeSVD() and check for 2x2 there } return computeSVD(this, U, W, V); } /** * LU Decomposition: this matrix must be a square matrix and the * LU GMatrix parameter must be the same size as this matrix. * The matrix LU will be overwritten as the combination of a * lower diagonal and upper diagonal matrix decompostion of this * matrix; the diagonal * elements of L (unity) are not stored. The GVector parameter * records the row permutation effected by the partial pivoting, * and is used as a parameter to the GVector method LUDBackSolve * to solve sets of linear equations. * This method returns +/- 1 depending on whether the number * of row interchanges was even or odd, respectively. * @param LU The matrix into which the lower and upper decompositions * will be placed. * @param permutation The row permutation effected by the partial * pivoting * @return +-1 depending on whether the number of row interchanges * was even or odd respectively */ public final int LUD(GMatrix LU, GVector permutation) { int size = LU.nRow*LU.nCol; double[] temp = new double[size]; int[] even_row_exchange = new int[1]; int[] row_perm = new int[LU.nRow]; int i, j; if (nRow != nCol) { throw new MismatchedSizeException (VecMathI18N.getString("GMatrix19")); } if (nRow != LU.nRow) { throw new MismatchedSizeException (VecMathI18N.getString("GMatrix27")); } if (nCol != LU.nCol) { throw new MismatchedSizeException (VecMathI18N.getString("GMatrix27")); } if (LU.nRow != permutation.getSize()) { throw new MismatchedSizeException (VecMathI18N.getString("GMatrix20")); } for (i = 0; i < nRow; i++) { for (j = 0; j < nCol; j++) { temp[i*nCol+j] = values[i][j]; } } // Calculate LU decomposition: Is the matrix singular? if (!luDecomposition(LU.nRow, temp, row_perm, even_row_exchange)) { // Matrix has no inverse throw new SingularMatrixException (VecMathI18N.getString("GMatrix21")); } for (i = 0; i < nRow; i++) { for (j = 0; j < nCol; j++) { LU.values[i][j] = temp[i*nCol+j]; } } for (i = 0; i < LU.nRow; i++){ permutation.values[i] = (double)row_perm[i]; } return even_row_exchange[0]; } /** * Sets this matrix to a uniform scale matrix; all of the * values are reset. * @param scale The new scale value */ public final void setScale(double scale) { int i, j, l; if (nRow < nCol) l = nRow; else l = nCol; for (i = 0; i < nRow; i++) { for (j = 0; j < nCol; j++) { values[i][j] = 0.0; } } for (i = 0; i < l; i++) { values[i][i] = scale; } } /** * General invert routine. Inverts m1 and places the result in "this". * Note that this routine handles both the "this" version and the * non-"this" version. * * Also note that since this routine is slow anyway, we won't worry * about allocating a little bit of garbage. */ final void invertGeneral(GMatrix m1) { int size = m1.nRow*m1.nCol; double temp[] = new double[size]; double result[] = new double[size]; int row_perm[] = new int[m1.nRow]; int[] even_row_exchange = new int[1]; int i, j; // Use LU decomposition and backsubstitution code specifically // for floating-point nxn matrices. if (m1.nRow != m1.nCol) { // Matrix is either under or over determined throw new MismatchedSizeException (VecMathI18N.getString("GMatrix22")); } // Copy source matrix to temp for (i = 0; i < nRow; i++) { for (j = 0; j < nCol; j++) { temp[i*nCol+j] = m1.values[i][j]; } } // Calculate LU decomposition: Is the matrix singular? if (!luDecomposition(m1.nRow, temp, row_perm, even_row_exchange)) { // Matrix has no inverse throw new SingularMatrixException (VecMathI18N.getString("GMatrix21")); } // Perform back substitution on the identity matrix for (i = 0; i < size; i++) result[i] = 0.0; for (i = 0; i < nCol; i++) result[i+i*nCol] = 1.0; luBacksubstitution(m1.nRow, temp, row_perm, result); for (i = 0; i < nRow; i++) { for (j = 0; j < nCol; j++) { values[i][j] = result[i*nCol+j]; } } } /** * Given a nxn array "matrix0", this function replaces it with the * LU decomposition of a row-wise permutation of itself. The input * parameters are "matrix0" and "dim". The array "matrix0" is also * an output parameter. The vector "row_perm[]" is an output * parameter that contains the row permutations resulting from partial * pivoting. The output parameter "even_row_xchg" is 1 when the * number of row exchanges is even, or -1 otherwise. Assumes data * type is always double. * * @return true if the matrix is nonsingular, or false otherwise. */ // // Reference: Press, Flannery, Teukolsky, Vetterling, // _Numerical_Recipes_in_C_, Cambridge University Press, // 1988, pp 40-45. // static boolean luDecomposition(int dim, double[] matrix0, int[] row_perm, int[] even_row_xchg) { double row_scale[] = new double[dim]; // Determine implicit scaling information by looping over rows int i, j; int ptr, rs, mtx; double big, temp; ptr = 0; rs = 0; even_row_xchg[0] = 1; // For each row ... i = dim; while (i-- != 0) { big = 0.0; // For each column, find the largest element in the row j = dim; while (j-- != 0) { temp = matrix0[ptr++]; temp = Math.abs(temp); if (temp > big) { big = temp; } } // Is the matrix singular? if (big == 0.0) { return false; } row_scale[rs++] = 1.0 / big; } // For all columns, execute Crout's method mtx = 0; for (j = 0; j < dim; j++) { int imax, k; int target, p1, p2; double sum; // Determine elements of upper diagonal matrix U for (i = 0; i < j; i++) { target = mtx + (dim*i) + j; sum = matrix0[target]; k = i; p1 = mtx + (dim*i); p2 = mtx + j; while (k-- != 0) { sum -= matrix0[p1] * matrix0[p2]; p1++; p2 += dim; } matrix0[target] = sum; } // Search for largest pivot element and calculate // intermediate elements of lower diagonal matrix L. big = 0.0; imax = -1; for (i = j; i < dim; i++) { target = mtx + (dim*i) + j; sum = matrix0[target]; k = j; p1 = mtx + (dim*i); p2 = mtx + j; while (k-- != 0) { sum -= matrix0[p1] * matrix0[p2]; p1++; p2 += dim; } matrix0[target] = sum; // Is this the best pivot so far? if ((temp = row_scale[i] * Math.abs(sum)) >= big) { big = temp; imax = i; } } if (imax < 0) { throw new RuntimeException(VecMathI18N.getString("GMatrix24")); } // Is a row exchange necessary? if (j != imax) { // Yes: exchange rows k = dim; p1 = mtx + (dim*imax); p2 = mtx + (dim*j); while (k-- != 0) { temp = matrix0[p1]; matrix0[p1++] = matrix0[p2]; matrix0[p2++] = temp; } // Record change in scale factor row_scale[imax] = row_scale[j]; even_row_xchg[0] = -even_row_xchg[0]; // change exchange parity } // Record row permutation row_perm[j] = imax; // Is the matrix singular if (matrix0[(mtx + (dim*j) + j)] == 0.0) { return false; } // Divide elements of lower diagonal matrix L by pivot if (j != (dim-1)) { temp = 1.0 / (matrix0[(mtx + (dim*j) + j)]); target = mtx + (dim*(j+1)) + j; i = (dim-1) - j; while (i-- != 0) { matrix0[target] *= temp; target += dim; } } } return true; } /** * Solves a set of linear equations. The input parameters "matrix1", * and "row_perm" come from luDecompostion and do not change * here. The parameter "matrix2" is a set of column vectors assembled * into a nxn matrix of floating-point values. The procedure takes each * column of "matrix2" in turn and treats it as the right-hand side of the * matrix equation Ax = LUx = b. The solution vector replaces the * original column of the matrix. * * If "matrix2" is the identity matrix, the procedure replaces its contents * with the inverse of the matrix from which "matrix1" was originally * derived. */ // // Reference: Press, Flannery, Teukolsky, Vetterling, // _Numerical_Recipes_in_C_, Cambridge University Press, // 1988, pp 44-45. // static void luBacksubstitution(int dim, double[] matrix1, int[] row_perm, double[] matrix2) { int i, ii, ip, j, k; int rp; int cv, rv, ri; double tt; // rp = row_perm; rp = 0; // For each column vector of matrix2 ... for (k = 0; k < dim; k++) { // cv = &(matrix2[0][k]); cv = k; ii = -1; // Forward substitution for (i = 0; i < dim; i++) { double sum; ip = row_perm[rp+i]; sum = matrix2[cv+dim*ip]; matrix2[cv+dim*ip] = matrix2[cv+dim*i]; if (ii >= 0) { // rv = &(matrix1[i][0]); rv = i*dim; for (j = ii; j <= i-1; j++) { sum -= matrix1[rv+j] * matrix2[cv+dim*j]; } } else if (sum != 0.0) { ii = i; } matrix2[cv+dim*i] = sum; } // Backsubstitution for (i = 0; i < dim; i++) { ri = (dim-1-i); rv = dim*(ri); tt = 0.0; for(j=1;j<=i;j++) { tt += matrix1[rv+dim-j] * matrix2[cv+dim*(dim-j)]; } matrix2[cv+dim*ri]= (matrix2[cv+dim*ri] - tt) / matrix1[rv+ri]; } } } static int computeSVD(GMatrix mat, GMatrix U, GMatrix W, GMatrix V) { int i, j, k; int nr, nc, si; int converged, rank; double cs, sn, r, mag,scale, t; int eLength, sLength, vecLength; GMatrix tmp = new GMatrix(mat.nRow, mat.nCol); GMatrix u = new GMatrix(mat.nRow, mat.nCol); GMatrix v = new GMatrix(mat.nRow, mat.nCol); GMatrix m = new GMatrix(mat); // compute the number of singular values if (m.nRow >= m.nCol) { sLength = m.nCol; eLength = m.nCol-1; }else { sLength = m.nRow; eLength = m.nRow; } if (m.nRow > m.nCol) vecLength = m.nRow; else vecLength = m.nCol; double[] vec = new double[vecLength]; double[] single_values = new double[sLength]; double[] e = new double[eLength]; if(debug) { System.out.println("input to compute_svd = \n"+m.toString()); } rank = 0; U.setIdentity(); V.setIdentity(); nr = m.nRow; nc = m.nCol; // householder reduction for (si = 0; si < sLength; si++) { // for each singular value if (nr > 1) { // zero out column if (debug) System.out.println ("*********************** U ***********************\n"); // compute reflector mag = 0.0; for (i = 0; i < nr; i++) { mag += m.values[i+si][si] * m.values[i+si][si]; if (debug) System.out.println ("mag = " + mag + " matrix.dot = " + m.values[i+si][si] * m.values[i+si][si]); } mag = Math.sqrt(mag); if (m.values[si][si] == 0.0) { vec[0] = mag; } else { vec[0] = m.values[si][si] + d_sign(mag, m.values[si][si]); } for (i = 1; i < nr; i++) { vec[i] = m.values[si+i][si]; } scale = 0.0; for (i = 0; i < nr; i++) { if (debug) System.out.println("vec["+i+"]="+vec[i]); scale += vec[i]*vec[i]; } scale = 2.0/scale; if (debug) System.out.println("scale = "+scale); for (j = si; j < m.nRow; j++) { for (k = si; k < m.nRow; k++) { u.values[j][k] = -scale * vec[j-si]*vec[k-si]; } } for (i = si; i < m.nRow; i++){ u.values[i][i] += 1.0; } // compute s t = 0.0; for (i = si; i < m.nRow; i++){ t += u.values[si][i] * m.values[i][si]; } m.values[si][si] = t; // apply reflector for (j = si; j < m.nRow; j++) { for (k = si+1; k < m.nCol; k++) { tmp.values[j][k] = 0.0; for (i = si; i < m.nCol; i++) { tmp.values[j][k] += u.values[j][i] * m.values[i][k]; } } } for (j = si; j < m.nRow; j++) { for (k = si+1; k < m.nCol; k++) { m.values[j][k] = tmp.values[j][k]; } } if (debug) { System.out.println("U =\n" + U.toString()); System.out.println("u =\n" + u.toString()); } // update U matrix for (j = si; j < m.nRow; j++) { for (k = 0; k < m.nCol; k++) { tmp.values[j][k] = 0.0; for (i = si; i < m.nCol; i++) { tmp.values[j][k] += u.values[j][i] * U.values[i][k]; } } } for (j = si; j < m.nRow; j++) { for (k = 0; k < m.nCol; k++) { U.values[j][k] = tmp.values[j][k]; } } if (debug) { System.out.println("single_values["+si+"] =\n" + single_values[si]); System.out.println("m =\n" + m.toString()); System.out.println("U =\n" + U.toString()); } nr--; } if( nc > 2 ) { // zero out row if (debug) System.out.println ("*********************** V ***********************\n"); mag = 0.0; for (i = 1; i < nc; i++){ mag += m.values[si][si+i] * m.values[si][si+i]; } if (debug) System.out.println("mag = " + mag); // generate the reflection vector, compute the first entry and // copy the rest from the row to be zeroed mag = Math.sqrt(mag); if (m.values[si][si+1] == 0.0) { vec[0] = mag; } else { vec[0] = m.values[si][si+1] + d_sign(mag, m.values[si][si+1]); } for (i = 1; i < nc - 1; i++){ vec[i] = m.values[si][si+i+1]; } // use reflection vector to compute v matrix scale = 0.0; for (i = 0; i < nc - 1; i++){ if( debug )System.out.println("vec["+i+"]="+vec[i]); scale += vec[i]*vec[i]; } scale = 2.0/scale; if (debug) System.out.println("scale = "+scale); for (j = si + 1; j < nc; j++) { for (k = si+1; k < m.nCol; k++) { v.values[j][k] = -scale * vec[j-si-1]*vec[k-si-1]; } } for (i = si + 1; i < m.nCol; i++){ v.values[i][i] += 1.0; } t=0.0; for (i = si; i < m.nCol; i++){ t += v.values[i][si+1] * m.values[si][i]; } m.values[si][si+1]=t; // apply reflector for (j = si + 1; j < m.nRow; j++) { for (k = si + 1; k < m.nCol; k++) { tmp.values[j][k] = 0.0; for (i = si + 1; i < m.nCol; i++) { tmp.values[j][k] += v.values[i][k] * m.values[j][i]; } } } for (j = si + 1; j < m.nRow; j++) { for (k = si + 1; k < m.nCol; k++) { m.values[j][k] = tmp.values[j][k]; } } if (debug) { System.out.println("V =\n" + V.toString()); System.out.println("v =\n" + v.toString()); System.out.println("tmp =\n" + tmp.toString()); } // update V matrix for (j = 0; j < m.nRow; j++) { for (k = si + 1; k < m.nCol; k++) { tmp.values[j][k] = 0.0; for (i = si + 1; i < m.nCol; i++) { tmp.values[j][k] += v.values[i][k] * V.values[j][i]; } } } if (debug) System.out.println("tmp =\n" + tmp.toString()); for (j = 0;j < m.nRow; j++) { for (k = si + 1; k < m.nCol; k++) { V.values[j][k] = tmp.values[j][k]; } } if (debug) { System.out.println("m =\n" + m.toString()); System.out.println("V =\n" + V.toString()); } nc--; } } for (i = 0; i < sLength; i++){ single_values[i] = m.values[i][i]; } for (i = 0; i < eLength; i++){ e[i] = m.values[i][i+1]; } // Fix ArrayIndexOutOfBounds for 2x2 matrices, which partially // addresses bug 4348562 for J3D 1.2.1. // // Does *not* fix the following problems reported in 4348562, // which will wait for J3D 1.3: // // 1) no output of W // 2) wrong transposition of U // 3) wrong results for 4x4 matrices // 4) slow performance if (m.nRow == 2 && m.nCol == 2) { double[] cosl = new double[1]; double[] cosr = new double[1]; double[] sinl = new double[1]; double[] sinr = new double[1]; compute_2X2(single_values[0], e[0], single_values[1], single_values, sinl, cosl, sinr, cosr, 0); update_u(0, U, cosl, sinl); update_v(0, V, cosr, sinr); return 2; } // compute_qr causes ArrayIndexOutOfBounds for 2x2 matrices compute_qr (0, e.length-1, single_values, e, U, V); // compute rank = number of non zero singular values rank = single_values.length; // sort by order of size of single values // and check for zero's return rank; } static void compute_qr(int start, int end, double[] s, double[] e, GMatrix u, GMatrix v) { int i, j, k, n, sl; boolean converged; double shift, r, utemp, vtemp, f, g; double[] cosl = new double[1]; double[] cosr = new double[1]; double[] sinl = new double[1]; double[] sinr = new double[1]; GMatrix m = new GMatrix(u.nCol, v.nRow); final int MAX_INTERATIONS = 2; final double CONVERGE_TOL = 4.89E-15; if (debug) { System.out.println("start =" + start); System.out.println("s =\n"); for(i=0;i 1) && (Math.abs(e[end]) < CONVERGE_TOL)) { end--; } // check if need to split for (n = end - 2; n > start; n--) { if (Math.abs(e[n]) < CONVERGE_TOL) { // split compute_qr(n + 1, end, s, e, u, v); // do lower matrix end = n - 1; // do upper matrix // check for convergence on off diagonals and reduce while ((end - start > 1) && (Math.abs(e[end]) < CONVERGE_TOL)) { end--; } } } if (debug) System.out.println("start = " + start); if ((end - start <= 1) && (Math.abs(e[start+1]) < CONVERGE_TOL)) { converged = true; } else { // check if zero on the diagonal } } if (debug) System.out.println("\n****call compute_2X2 ********************\n"); if (Math.abs(e[1]) < CONVERGE_TOL) { compute_2X2(s[start], e[start], s[start+1], s, sinl, cosl, sinr, cosr, 0); e[start] = 0.0; e[start+1] = 0.0; } else { } i = start; update_u(i, u, cosl, sinl); update_v(i, v, cosr, sinr); if(debug) { System.out.println ("\n*******after call compute_2X2 **********************\n"); print_svd(s, e, u, v); } return; } private static void print_se(double[] s, double[] e) { System.out.println("\ns =" + s[0] + " " + s[1] + " " + s[2]); System.out.println("e =" + e[0] + " " + e[1]); } private static void update_v(int index, GMatrix v, double[] cosr, double[] sinr) { int j; double vtemp; for (j = 0; j < v.nRow; j++) { vtemp = v.values[j][index]; v.values[j][index] = cosr[0]*vtemp + sinr[0]*v.values[j][index+1]; v.values[j][index+1] = -sinr[0]*vtemp + cosr[0]*v.values[j][index+1]; } } private static void chase_up(double[] s, double[] e, int k, GMatrix v) { double f, g, r; double[] cosr = new double[1]; double[] sinr = new double[1]; int i; GMatrix t = new GMatrix(v.nRow, v.nCol); GMatrix m = new GMatrix(v.nRow, v.nCol); if (debug) { m.setIdentity(); for (i = 0; i < s.length; i++) { m.values[i][i] = s[i]; } for (i = 0; i < e.length; i++) { m.values[i][i+1] = e[i]; } } f = e[k]; g = s[k]; for (i = k; i > 0; i--) { r = compute_rot(f, g, sinr, cosr); f = -e[i-1] * sinr[0]; g = s[i-1]; s[i] = r; e[i-1] = e[i-1] * cosr[0]; update_v_split(i, k+1, v, cosr, sinr, t, m); } s[i+1] = compute_rot(f, g, sinr, cosr); update_v_split(i, k+1, v, cosr, sinr, t, m); } private static void chase_across(double[] s, double[] e, int k, GMatrix u) { double f, g, r; double[] cosl = new double[1]; double[] sinl = new double[1]; int i; GMatrix t = new GMatrix(u.nRow, u.nCol); GMatrix m = new GMatrix(u.nRow, u.nCol); if (debug) { m.setIdentity(); for (i = 0; i < s.length; i++) { m.values[i][i] = s[i]; } for (i = 0; i < e.length; i++) { m.values[i][i+1] = e[i]; } } g = e[k]; f = s[k+1]; for (i = k; i < u.nCol-2; i++){ r = compute_rot(f, g, sinl, cosl); g = -e[i+1] * sinl[0]; f = s[i+2]; s[i+1] = r; e[i+1] = e[i+1] * cosl[0]; update_u_split(k, i + 1, u, cosl, sinl, t, m); } s[i+1] = compute_rot(f, g, sinl, cosl); update_u_split(k, i + 1, u, cosl, sinl, t, m); } private static void update_v_split(int topr, int bottomr, GMatrix v, double[] cosr, double[] sinr, GMatrix t, GMatrix m) { int j; double vtemp; for (j = 0; j < v.nRow; j++) { vtemp = v.values[j][topr]; v.values[j][topr] = cosr[0]*vtemp - sinr[0]*v.values[j][bottomr]; v.values[j][bottomr] = sinr[0]*vtemp + cosr[0]*v.values[j][bottomr]; } if (debug) { t.setIdentity(); for (j = 0; j < v.nRow; j++) { vtemp = t.values[j][topr]; t.values[j][topr] = cosr[0]*vtemp - sinr[0]*t.values[j][bottomr]; t.values[j][bottomr] = sinr[0]*vtemp + cosr[0]*t.values[j][bottomr]; } } System.out.println("topr =" + topr); System.out.println("bottomr =" + bottomr); System.out.println("cosr =" + cosr[0]); System.out.println("sinr =" + sinr[0]); System.out.println("\nm ="); checkMatrix(m); System.out.println("\nv ="); checkMatrix(t); m.mul(m,t); System.out.println("\nt*m ="); checkMatrix(m); } private static void update_u_split(int topr, int bottomr, GMatrix u, double[] cosl, double[] sinl, GMatrix t, GMatrix m) { int j; double utemp; for (j = 0; j < u.nCol; j++) { utemp = u.values[topr][j]; u.values[topr][j] = cosl[0]*utemp - sinl[0]*u.values[bottomr][j]; u.values[bottomr][j] = sinl[0]*utemp + cosl[0]*u.values[bottomr][j]; } if(debug) { t.setIdentity(); for (j = 0;j < u.nCol; j++) { utemp = t.values[topr][j]; t.values[topr][j] = cosl[0]*utemp - sinl[0]*t.values[bottomr][j]; t.values[bottomr][j] = sinl[0]*utemp + cosl[0]*t.values[bottomr][j]; } } System.out.println("\nm="); checkMatrix(m); System.out.println("\nu="); checkMatrix(t); m.mul(t,m); System.out.println("\nt*m="); checkMatrix(m); } private static void update_u(int index, GMatrix u, double[] cosl, double[] sinl) { int j; double utemp; for (j = 0; j < u.nCol; j++) { utemp = u.values[index][j]; u.values[index][j] = cosl[0]*utemp + sinl[0]*u.values[index+1][j]; u.values[index+1][j] = -sinl[0]*utemp + cosl[0]*u.values[index+1][j]; } } private static void print_m(GMatrix m, GMatrix u, GMatrix v) { GMatrix mtmp = new GMatrix(m.nCol, m.nRow); mtmp.mul(u, mtmp); mtmp.mul(mtmp, v); System.out.println("\n m = \n" + mtmp.toString(mtmp)); } private static String toString(GMatrix m) { StringBuffer buffer = new StringBuffer(m.nRow * m.nCol * 8); int i, j; for (i = 0; i < m.nRow; i++) { for(j = 0; j < m.nCol; j++) { if (Math.abs(m.values[i][j]) < .000000001) { buffer.append("0.0000 "); } else { buffer.append(m.values[i][j]).append(" "); } } buffer.append("\n"); } return buffer.toString(); } private static void print_svd(double[] s, double[] e, GMatrix u, GMatrix v) { int i; GMatrix mtmp = new GMatrix(u.nCol, v.nRow); System.out.println(" \ns = "); for (i = 0; i < s.length; i++) { System.out.println(" " + s[i]); } System.out.println(" \ne = "); for (i = 0; i < e.length; i++) { System.out.println(" " + e[i]); } System.out.println(" \nu = \n" + u.toString()); System.out.println(" \nv = \n" + v.toString()); mtmp.setIdentity(); for (i = 0; i < s.length; i++) { mtmp.values[i][i] = s[i]; } for (i = 0; i < e.length; i++) { mtmp.values[i][i+1] = e[i]; } System.out.println(" \nm = \n"+mtmp.toString()); mtmp.mulTransposeLeft(u, mtmp); mtmp.mulTransposeRight(mtmp, v); System.out.println(" \n u.transpose*m*v.transpose = \n" + mtmp.toString()); } static double max(double a, double b) { if (a > b) return a; else return b; } static double min(double a, double b) { if (a < b) return a; else return b; } static double compute_shift(double f, double g, double h) { double d__1, d__2; double fhmn, fhmx, c, fa, ga, ha, as, at, au; double ssmin; fa = Math.abs(f); ga = Math.abs(g); ha = Math.abs(h); fhmn = min(fa,ha); fhmx = max(fa,ha); if (fhmn == 0.0) { ssmin = 0.0; if (fhmx == 0.0) { } else { d__1 = min(fhmx,ga) / max(fhmx,ga); } } else { if (ga < fhmx) { as = fhmn / fhmx + 1.0; at = (fhmx - fhmn) / fhmx; d__1 = ga / fhmx; au = d__1 * d__1; c = 2.0 / (Math.sqrt(as * as + au) + Math.sqrt(at * at + au)); ssmin = fhmn * c; } else { au = fhmx / ga; if (au == 0.0) { ssmin = fhmn * fhmx / ga; } else { as = fhmn / fhmx + 1.0; at = (fhmx - fhmn) / fhmx; d__1 = as * au; d__2 = at * au; c = 1.0 / (Math.sqrt(d__1 * d__1 + 1.0) + Math.sqrt(d__2 * d__2 + 1.0)); ssmin = fhmn * c * au; ssmin += ssmin; } } } return ssmin; } static int compute_2X2(double f, double g, double h, double[] single_values, double[] snl, double[] csl, double[] snr, double[] csr, int index) { double c_b3 = 2.0; double c_b4 = 1.0; double d__1; int pmax; double temp; boolean swap; double a, d, l, m, r, s, t, tsign, fa, ga, ha; double ft, gt, ht, mm; boolean gasmal; double tt, clt, crt, slt, srt; double ssmin,ssmax; ssmax = single_values[0]; ssmin = single_values[1]; clt = 0.0; crt = 0.0; slt = 0.0; srt = 0.0; tsign = 0.0; ft = f; fa = Math.abs(ft); ht = h; ha = Math.abs(h); pmax = 1; if (ha > fa) swap = true; else swap = false; if (swap) { pmax = 3; temp = ft; ft = ht; ht = temp; temp = fa; fa = ha; ha = temp; } gt = g; ga = Math.abs(gt); if (ga == 0.0) { single_values[1] = ha; single_values[0] = fa; clt = 1.0; crt = 1.0; slt = 0.0; srt = 0.0; } else { gasmal = true; if (ga > fa) { pmax = 2; if (fa / ga < EPS) { gasmal = false; ssmax = ga; if (ha > 1.0) { ssmin = fa / (ga / ha); } else { ssmin = fa / ga * ha; } clt = 1.0; slt = ht / gt; srt = 1.0; crt = ft / gt; } } if (gasmal) { d = fa - ha; if (d == fa) { l = 1.0; } else { l = d / fa; } m = gt / ft; t = 2.0 - l; mm = m * m; tt = t * t; s = Math.sqrt(tt + mm); if (l == 0.0) { r = Math.abs(m); } else { r = Math.sqrt(l * l + mm); } a = (s + r) * 0.5; if (ga > fa) { pmax = 2; if (fa / ga < EPS) { gasmal = false; ssmax = ga; if (ha > 1.0) { ssmin = fa / (ga / ha); } else { ssmin = fa / ga * ha; } clt = 1.0; slt = ht / gt; srt = 1.0; crt = ft / gt; } } if (gasmal) { d = fa - ha; if (d == fa) { l = 1.0; } else { l = d / fa; } m = gt / ft; t = 2.0 - l; mm = m * m; tt = t * t; s = Math.sqrt(tt + mm); if (l == 0.) { r = Math.abs(m); } else { r = Math.sqrt(l * l + mm); } a = (s + r) * 0.5; ssmin = ha / a; ssmax = fa * a; if (mm == 0.0) { if (l == 0.0) { t = d_sign(c_b3, ft) * d_sign(c_b4, gt); } else { t = gt / d_sign(d, ft) + m / t; } } else { t = (m / (s + t) + m / (r + l)) * (a + 1.0); } l = Math.sqrt(t * t + 4.0); crt = 2.0 / l; srt = t / l; clt = (crt + srt * m) / a; slt = ht / ft * srt / a; } } if (swap) { csl[0] = srt; snl[0] = crt; csr[0] = slt; snr[0] = clt; } else { csl[0] = clt; snl[0] = slt; csr[0] = crt; snr[0] = srt; } if (pmax == 1) { tsign = d_sign(c_b4, csr[0]) * d_sign(c_b4, csl[0]) * d_sign(c_b4, f); } if (pmax == 2) { tsign = d_sign(c_b4, snr[0]) * d_sign(c_b4, csl[0]) * d_sign(c_b4, g); } if (pmax == 3) { tsign = d_sign(c_b4, snr[0]) * d_sign(c_b4, snl[0]) * d_sign(c_b4, h); } single_values[index] = d_sign(ssmax, tsign); d__1 = tsign * d_sign(c_b4, f) * d_sign(c_b4, h); single_values[index+1] = d_sign(ssmin, d__1); } return 0; } static double compute_rot(double f, double g, double[] sin, double[] cos) { int i__1; double d__1, d__2; double cs, sn; int i; double scale; int count; double f1, g1; double r; final double safmn2 = 2.002083095183101E-146; final double safmx2 = 4.994797680505588E+145; if (g == 0.0) { cs = 1.0; sn = 0.0; r = f; } else if (f == 0.0) { cs = 0.0; sn = 1.0; r = g; } else { f1 = f; g1 = g; scale = max(Math.abs(f1),Math.abs(g1)); if (scale >= safmx2) { count = 0; while(scale >= safmx2) { ++count; f1 *= safmn2; g1 *= safmn2; scale = max(Math.abs(f1), Math.abs(g1)); } r = Math.sqrt(f1*f1 + g1*g1); cs = f1 / r; sn = g1 / r; i__1 = count; for (i = 1; i <= count; ++i) { r *= safmx2; } } else if (scale <= safmn2) { count = 0; while(scale <= safmn2) { ++count; f1 *= safmx2; g1 *= safmx2; scale = max(Math.abs(f1), Math.abs(g1)); } r = Math.sqrt(f1*f1 + g1*g1); cs = f1 / r; sn = g1 / r; i__1 = count; for (i = 1; i <= count; ++i) { r *= safmn2; } } else { r = Math.sqrt(f1*f1 + g1*g1); cs = f1 / r; sn = g1 / r; } if (Math.abs(f) > Math.abs(g) && cs < 0.0) { cs = -cs; sn = -sn; r = -r; } } sin[0] = sn; cos[0] = cs; return r; } static double d_sign(double a, double b) { double x; x = (a >= 0 ? a : - a); return (b >= 0 ? x : -x); } /** * Creates a new object of the same class as this object. * * @return a clone of this instance. * @exception OutOfMemoryError if there is not enough memory. * @see java.lang.Cloneable * @since Java 3D 1.3 */ public Object clone() { GMatrix m1 = null; try { m1 = (GMatrix)super.clone(); } catch (CloneNotSupportedException e) { // this shouldn't happen, since we are Cloneable throw new InternalError(); } // Also need to clone array of values m1.values = new double[nRow][nCol]; for (int i = 0; i < nRow; i++) { for(int j = 0; j < nCol; j++) { m1.values[i][j] = values[i][j]; } } return m1; } }