3 public class MCMatrix {
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9 float myconst = (float)(Math.PI/180);
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11 public MCMatrix(int rows, int cols) {
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12 matrix = new float[rows][cols];
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13 tmp = new float[rows][cols];
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16 public void addElement(int i, int j, float value) {
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17 matrix[i][j] = value;
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20 public void print() {
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21 System.out.println(matrix[0][0] + " " + matrix[0][1] + " " + matrix[0][2]);
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22 System.out.println(matrix[1][0] + " " + matrix[1][1] + " " + matrix[1][2]);
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23 System.out.println(matrix[2][0] + " " + matrix[2][1] + " " + matrix[2][2]);
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26 public void rotatex(float degrees) {
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27 mycos = (float)(Math.cos(degrees*myconst));
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28 mysin = (float)(Math.sin(degrees*myconst));
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42 public void rotatez(float degrees) {
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43 mycos = (float)(Math.cos(degrees*myconst));
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44 mysin = (float)(Math.sin(degrees*myconst));
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59 public void rotatey(float degrees) {
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60 mycos = (float)(Math.cos(degrees*myconst));
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61 mysin = (float)(Math.sin(degrees*myconst));
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76 public float[] vectorMultiply(float[] vect) {
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77 float temp[] = new float[3];
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83 for (int i = 0; i < 3; i++) {
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84 temp[i] = (float)matrix[i][0]*vect[0] + (float)matrix[i][1]*vect[1] +(float)matrix[i][2]*vect[2];
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94 public void preMultiply(float mat[][]) {
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95 float tmp[][] = new float[3][3];
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97 for (int i = 0; i < 3 ; i++) {
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98 for (int j = 0; j < 3; j++ ) {
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99 tmp[i][j] = mat[i][0]*matrix[0][j] +
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100 mat[i][1]*matrix[1][j] +
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101 mat[i][2]*matrix[2][j];
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105 for (int i = 0; i < 3 ; i++) {
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106 for (int j = 0; j < 3; j++ ) {
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107 matrix[i][j] = tmp[i][j];
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112 public void postMultiply(float mat[][]) {
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113 float tmp[][] = new float[3][3];
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115 for (int i = 0; i < 3 ; i++) {
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116 for (int j = 0; j < 3; j++ ) {
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117 tmp[i][j] = matrix[i][0]*mat[0][j] +
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118 matrix[i][1]*mat[1][j] +
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119 matrix[i][2]*mat[2][j];
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123 for (int i = 0; i < 3 ; i++) {
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124 for (int j = 0; j < 3; j++ ) {
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125 matrix[i][j] = tmp[i][j];
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130 public void setIdentity() {
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