2 * Jalview - A Sequence Alignment Editor and Viewer
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3 * Copyright (C) 2007 AM Waterhouse, J Procter, G Barton, M Clamp, S Searle
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5 * This program is free software; you can redistribute it and/or
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6 * modify it under the terms of the GNU General Public License
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7 * as published by the Free Software Foundation; either version 2
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8 * of the License, or (at your option) any later version.
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10 * This program is distributed in the hope that it will be useful,
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11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 * GNU General Public License for more details.
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15 * You should have received a copy of the GNU General Public License
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16 * along with this program; if not, write to the Free Software
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17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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21 public class MCMatrix
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27 float myconst = (float) (Math.PI / 180);
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29 public MCMatrix(int rows, int cols)
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31 matrix = new float[rows][cols];
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32 tmp = new float[rows][cols];
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35 public void addElement(int i, int j, float value)
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37 matrix[i][j] = value;
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40 public void rotatex(float degrees)
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42 mycos = (float) (Math.cos(degrees * myconst));
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43 mysin = (float) (Math.sin(degrees * myconst));
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57 public void rotatez(float degrees)
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59 mycos = (float) (Math.cos(degrees * myconst));
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60 mysin = (float) (Math.sin(degrees * myconst));
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75 public void rotatey(float degrees)
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77 mycos = (float) (Math.cos(degrees * myconst));
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78 mysin = (float) (Math.sin(degrees * myconst));
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93 public float[] vectorMultiply(float[] vect)
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95 float[] temp = new float[3];
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101 for (int i = 0; i < 3; i++)
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103 temp[i] = ( (float) matrix[i][0] * vect[0]) +
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104 ( (float) matrix[i][1] * vect[1]) +
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105 ( (float) matrix[i][2] * vect[2]);
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115 public void preMultiply(float[][] mat)
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117 float[][] tmp = new float[3][3];
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119 for (int i = 0; i < 3; i++)
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121 for (int j = 0; j < 3; j++)
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123 tmp[i][j] = (mat[i][0] * matrix[0][j]) +
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124 (mat[i][1] * matrix[1][j]) + (mat[i][2] * matrix[2][j]);
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128 for (int i = 0; i < 3; i++)
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130 for (int j = 0; j < 3; j++)
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132 matrix[i][j] = tmp[i][j];
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137 public void postMultiply(float[][] mat)
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139 float[][] tmp = new float[3][3];
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141 for (int i = 0; i < 3; i++)
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143 for (int j = 0; j < 3; j++)
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145 tmp[i][j] = (matrix[i][0] * mat[0][j]) +
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146 (matrix[i][1] * mat[1][j]) + (matrix[i][2] * mat[2][j]);
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150 for (int i = 0; i < 3; i++)
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152 for (int j = 0; j < 3; j++)
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154 matrix[i][j] = tmp[i][j];
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159 public void setIdentity()
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