--- /dev/null
+/*
+ Copyright (C) 1997,1998,1999
+ Kenji Hiranabe, Eiwa System Management, Inc.
+
+ This program is free software.
+ Implemented by Kenji Hiranabe(hiranabe@esm.co.jp),
+ conforming to the Java(TM) 3D API specification by Sun Microsystems.
+
+ Permission to use, copy, modify, distribute and sell this software
+ and its documentation for any purpose is hereby granted without fee,
+ provided that the above copyright notice appear in all copies and
+ that both that copyright notice and this permission notice appear
+ in supporting documentation. Kenji Hiranabe and Eiwa System Management,Inc.
+ makes no representations about the suitability of this software for any
+ purpose. It is provided "AS IS" with NO WARRANTY.
+*/
+package javajs.util;
+
+import java.io.Serializable;
+
+
+
+/**
+ * A single precision floating point 3 by 3 matrix.
+ *
+ * @author Kenji hiranabe
+ *
+ * additions by Bob Hanson hansonr@stolaf.edu 9/30/2012 for unique
+ * constructor and method names for the optimization of compiled
+ * JavaScript using Java2Script
+ *
+ *
+ */
+public class M3 extends M34 implements Serializable {
+
+ /**
+ * Constructs and initializes a Matrix3f to all zeros.
+ * @j2sIgnore
+ */
+ public M3() {
+ }
+
+ /**
+ * Constructs and initializes a Matrix3f from the specified 9 element array.
+ * this.m00 =v[0], this.m01=v[1], etc.
+ *
+ * @param v
+ * the array of length 9 containing in order
+ * @return m
+ */
+ public static M3 newA9(float[] v) {
+ M3 m = new M3();
+ m.setA(v);
+ return m;
+ }
+
+ /**
+ * Constructs a new matrix with the same values as the Matrix3f parameter.
+ *
+ * @param m1
+ * The source matrix.
+ * @return m
+ */
+ public static M3 newM3(M3 m1) {
+ M3 m = new M3();
+ if (m1 == null) {
+ m.setScale(1);
+ return m;
+ }
+ m.m00 = m1.m00;
+ m.m01 = m1.m01;
+ m.m02 = m1.m02;
+
+ m.m10 = m1.m10;
+ m.m11 = m1.m11;
+ m.m12 = m1.m12;
+
+ m.m20 = m1.m20;
+ m.m21 = m1.m21;
+ m.m22 = m1.m22;
+ return m;
+ }
+
+ /**
+ * Sets this Matrix3f to a scalar * Identity.
+ * @param scale
+ */
+ public void setScale(float scale) {
+ clear33();
+ m00 = m11 = m22 = scale;
+ }
+
+ /**
+ * Sets the value of this matrix to the double value of the Matrix3f argument.
+ *
+ * @param m1
+ * the matrix3f
+ */
+ public void setM3(M34 m1) {
+ setM33(m1);
+ }
+ /**
+ * Sets the values in this Matrix3f equal to the row-major array parameter
+ * (ie, the first four elements of the array will be copied into the first row
+ * of this matrix, etc.).
+ *
+ * @param m
+ */
+ public void setA(float m[]) {
+ m00 = m[0];
+ m01 = m[1];
+ m02 = m[2];
+ m10 = m[3];
+ m11 = m[4];
+ m12 = m[5];
+ m20 = m[6];
+ m21 = m[7];
+ m22 = m[8];
+ }
+
+ /**
+ * Sets the specified element of this matrix3d to the value provided.
+ *
+ * @param row
+ * the row number to be modified (zero indexed)
+ * @param col
+ * the column number to be modified (zero indexed)
+ * @param v
+ * the new value
+ */
+ public void setElement(int row, int col, float v) {
+ set33(row, col, v);
+ }
+
+ /**
+ * Retrieves the value at the specified row and column of this matrix.
+ *
+ * @param row
+ * the row number to be retrieved (zero indexed)
+ * @param col
+ * the column number to be retrieved (zero indexed)
+ * @return the value at the indexed element
+ */
+ public float getElement(int row, int col) {
+ return get33(row, col);
+ }
+
+ /**
+ * Sets the specified row of this matrix3d to the three values provided.
+ *
+ * @param row
+ * the row number to be modified (zero indexed)
+ * @param x
+ * the first column element
+ * @param y
+ * the second column element
+ * @param z
+ * the third column element
+ */
+ public void setRow(int row, float x, float y, float z) {
+ switch (row) {
+ case 0:
+ m00 = x;
+ m01 = y;
+ m02 = z;
+ return;
+ case 1:
+ m10 = x;
+ m11 = y;
+ m12 = z;
+ return;
+ case 2:
+ m20 = x;
+ m21 = y;
+ m22 = z;
+ return;
+ default:
+ err();
+ }
+ }
+
+ /**
+ * Sets the specified row of this matrix3d to the Vector provided.
+ *
+ * @param row
+ * the row number to be modified (zero indexed)
+ * @param v
+ * the replacement row
+ */
+ public void setRowV(int row, T3 v) {
+ switch (row) {
+ case 0:
+ m00 = v.x;
+ m01 = v.y;
+ m02 = v.z;
+ return;
+ case 1:
+ m10 = v.x;
+ m11 = v.y;
+ m12 = v.z;
+ return;
+ case 2:
+ m20 = v.x;
+ m21 = v.y;
+ m22 = v.z;
+ return;
+ default:
+ err();
+ }
+ }
+
+ /**
+ * Sets the specified row of this matrix3d to the four values provided.
+ *
+ * @param row
+ * the row number to be modified (zero indexed)
+ * @param v
+ * the replacement row
+ */
+ public void setRowA(int row, float v[]) {
+ setRow33(row, v);
+ }
+
+ /**
+ * Copies the matrix values in the specified row into the array parameter.
+ *
+ * @param row
+ * the matrix row
+ * @param v
+ * The array into which the matrix row values will be copied
+ */
+ @Override
+ public void getRow(int row, float v[]) {
+ getRow33(row, v);
+ }
+
+ /**
+ * Sets the specified column of this matrix3d to the three values provided.
+ *
+ * @param column
+ * the column number to be modified (zero indexed)
+ * @param x
+ * the first row element
+ * @param y
+ * the second row element
+ * @param z
+ * the third row element
+ */
+ public void setColumn3(int column, float x, float y, float z) {
+ switch (column) {
+ case 0:
+ m00 = x;
+ m10 = y;
+ m20 = z;
+ break;
+ case 1:
+ m01 = x;
+ m11 = y;
+ m21 = z;
+ break;
+ case 2:
+ m02 = x;
+ m12 = y;
+ m22 = z;
+ break;
+ default:
+ err();
+ }
+ }
+
+ /**
+ * Sets the specified column of this matrix3d to the vector provided.
+ *
+ * @param column
+ * the column number to be modified (zero indexed)
+ * @param v
+ * the replacement column
+ */
+ public void setColumnV(int column, T3 v) {
+ switch (column) {
+ case 0:
+ m00 = v.x;
+ m10 = v.y;
+ m20 = v.z;
+ break;
+ case 1:
+ m01 = v.x;
+ m11 = v.y;
+ m21 = v.z;
+ break;
+ case 2:
+ m02 = v.x;
+ m12 = v.y;
+ m22 = v.z;
+ break;
+ default:
+ err();
+ }
+ }
+
+ /**
+ * Copies the matrix values in the specified column into the vector parameter.
+ *
+ * @param column
+ * the matrix column
+ * @param v
+ * The vector into which the matrix row values will be copied
+ */
+ public void getColumnV(int column, T3 v) {
+ switch (column) {
+ case 0:
+ v.x = m00;
+ v.y = m10;
+ v.z = m20;
+ break;
+ case 1:
+ v.x = m01;
+ v.y = m11;
+ v.z = m21;
+ break;
+ case 2:
+ v.x = m02;
+ v.y = m12;
+ v.z = m22;
+ break;
+ default:
+ err();
+ }
+ }
+
+ /**
+ * Sets the specified column of this matrix3d to the four values provided.
+ *
+ * @param column
+ * the column number to be modified (zero indexed)
+ * @param v
+ * the replacement column
+ */
+ public void setColumnA(int column, float v[]) {
+ setColumn33(column, v);
+ }
+
+ /**
+ * Copies the matrix values in the specified column into the array parameter.
+ *
+ * @param column
+ * the matrix column
+ * @param v
+ * The array into which the matrix row values will be copied
+ */
+ public void getColumn(int column, float v[]) {
+ getColumn33(column, v);
+ }
+
+ /**
+ * Sets the value of this matrix to sum of itself and matrix m1.
+ *
+ * @param m1
+ * the other matrix
+ */
+ public void add(M3 m1) {
+ add33(m1);
+ }
+
+ /**
+ * Sets the value of this matrix to the matrix difference of itself and matrix
+ * m1 (this = this - m1).
+ *
+ * @param m1
+ * the other matrix
+ */
+ public void sub(M3 m1) {
+ sub33(m1);
+ }
+
+ /**
+ * Sets the value of this matrix to its transpose.
+ */
+ public void transpose() {
+ transpose33();
+ }
+
+ /**
+ * Sets the value of this matrix to the transpose of the argument matrix
+ *
+ * @param m1
+ * the matrix to be transposed
+ */
+ public void transposeM(M3 m1) {
+ // alias-safe
+ setM33(m1);
+ transpose33();
+ }
+
+ /**
+ * Sets the value of this matrix to the matrix inverse of the passed matrix
+ * m1.
+ *
+ * @param m1
+ * the matrix to be inverted
+ */
+ public void invertM(M3 m1) {
+ setM33(m1);
+ invert();
+ }
+
+ /**
+ * Sets the value of this matrix to its inverse.
+ */
+ public void invert() {
+ double s = determinant3();
+ if (s == 0.0)
+ return;
+ s = 1 / s;
+ // alias-safe way.
+ set9(m11 * m22 - m12 * m21, m02 * m21 - m01 * m22, m01 * m12 - m02 * m11,
+ m12 * m20 - m10 * m22, m00 * m22 - m02 * m20, m02 * m10 - m00 * m12,
+ m10 * m21 - m11 * m20, m01 * m20 - m00 * m21, m00 * m11 - m01 * m10);
+ scale((float) s);
+ }
+
+ /**
+ * Sets the value of this matrix to a rotation matrix about the x axis by the
+ * passed angle.
+ *
+ * @param angle
+ * the angle to rotate about the X axis in radians
+ * @return this
+ */
+ public M3 setAsXRotation(float angle) {
+ setXRot(angle);
+ return this;
+ }
+
+ /**
+ * Sets the value of this matrix to a rotation matrix about the y axis by the
+ * passed angle.
+ *
+ * @param angle
+ * the angle to rotate about the Y axis in radians
+ * @return this
+ */
+ public M3 setAsYRotation(float angle) {
+ setYRot(angle);
+ return this;
+ }
+
+ /**
+ * Sets the value of this matrix to a rotation matrix about the z axis by the
+ * passed angle.
+ *
+ * @param angle
+ * the angle to rotate about the Z axis in radians
+ * @return this
+ */
+ public M3 setAsZRotation(float angle) {
+ setZRot(angle);
+ return this;
+ }
+
+ /**
+ * Multiplies each element of this matrix by a scalar.
+ *
+ * @param scalar
+ * The scalar multiplier.
+ */
+ public void scale(float scalar) {
+ mul33(scalar);
+ }
+
+ /**
+ * Sets the value of this matrix to the result of multiplying itself with
+ * matrix m1.
+ *
+ * @param m1
+ * the other matrix
+ */
+ public void mul(M3 m1) {
+ mul2(this, m1);
+ }
+
+ /**
+ * Sets the value of this matrix to the result of multiplying the two argument
+ * matrices together.
+ *
+ * @param m1
+ * the first matrix
+ * @param m2
+ * the second matrix
+ */
+ public void mul2(M3 m1, M3 m2) {
+ // alias-safe way.
+ set9(m1.m00 * m2.m00 + m1.m01 * m2.m10 + m1.m02 * m2.m20, m1.m00 * m2.m01
+ + m1.m01 * m2.m11 + m1.m02 * m2.m21, m1.m00 * m2.m02 + m1.m01 * m2.m12
+ + m1.m02 * m2.m22,
+
+ m1.m10 * m2.m00 + m1.m11 * m2.m10 + m1.m12 * m2.m20, m1.m10 * m2.m01
+ + m1.m11 * m2.m11 + m1.m12 * m2.m21, m1.m10 * m2.m02 + m1.m11 * m2.m12
+ + m1.m12 * m2.m22,
+
+ m1.m20 * m2.m00 + m1.m21 * m2.m10 + m1.m22 * m2.m20, m1.m20 * m2.m01
+ + m1.m21 * m2.m11 + m1.m22 * m2.m21, m1.m20 * m2.m02 + m1.m21 * m2.m12
+ + m1.m22 * m2.m22);
+ }
+
+ /**
+ * Returns true if the Object o is of type Matrix3f and all of the data
+ * members of t1 are equal to the corresponding data members in this Matrix3f.
+ *
+ * @param o
+ * the object with which the comparison is made.
+ */
+ @Override
+ public boolean equals(Object o) {
+ if (!(o instanceof M3))
+ return false;
+ M3 m = (M3) o;
+ return m00 == m.m00 && m01 == m.m01 && m02 == m.m02 && m10 == m.m10
+ && m11 == m.m11 && m12 == m.m12 && m20 == m.m20 && m21 == m.m21
+ && m22 == m.m22;
+ }
+
+ /**
+ * Returns a hash number based on the data values in this object. Two
+ * different Matrix3f objects with identical data values (ie, returns true for
+ * equals(Matrix3f) ) will return the same hash number. Two objects with
+ * different data members may return the same hash value, although this is not
+ * likely.
+ *
+ * @return the integer hash value
+ */
+ @Override
+ public int hashCode() {
+ return T3.floatToIntBits0(m00) ^ T3.floatToIntBits0(m01)
+ ^ T3.floatToIntBits0(m02) ^ T3.floatToIntBits0(m10)
+ ^ T3.floatToIntBits0(m11) ^ T3.floatToIntBits0(m12)
+ ^ T3.floatToIntBits0(m20) ^ T3.floatToIntBits0(m21)
+ ^ T3.floatToIntBits0(m22);
+ }
+
+ /**
+ * Sets this matrix to all zeros.
+ */
+ public void setZero() {
+ clear33();
+ }
+
+ /**
+ * Sets 9 values
+ *
+ * @param m00
+ * @param m01
+ * @param m02
+ * @param m10
+ * @param m11
+ * @param m12
+ * @param m20
+ * @param m21
+ * @param m22
+ */
+ private void set9(float m00, float m01, float m02, float m10, float m11,
+ float m12, float m20, float m21, float m22) {
+ this.m00 = m00;
+ this.m01 = m01;
+ this.m02 = m02;
+ this.m10 = m10;
+ this.m11 = m11;
+ this.m12 = m12;
+ this.m20 = m20;
+ this.m21 = m21;
+ this.m22 = m22;
+ }
+
+ /**
+ * Returns a string that contains the values of this Matrix3f.
+ *
+ * @return the String representation
+ */
+ @Override
+ public String toString() {
+ return "[\n [" + m00 + "\t" + m01 + "\t" + m02 + "]" + "\n [" + m10
+ + "\t" + m11 + "\t" + m12 + "]" + "\n [" + m20 + "\t" + m21 + "\t"
+ + m22 + "] ]";
+ }
+
+ /**
+ * Sets the value of this matrix to the matrix conversion of the single
+ * precision axis and angle argument.
+ *
+ * @param a
+ * the axis and angle to be converted
+ * @return this
+ */
+ public M3 setAA(A4 a) {
+ setAA33(a);
+ return this;
+ }
+
+ /**
+ * 3D ball rotation from dx dy in-plane mouse motion
+ * adapted from Andrew Hanson
+ * Computer Graphics beyond the Third Dimension:
+ * Geometry, Orientation Control, and Rendering for
+ * Graphics in Dimensions Greater than Three
+ * Course Notes for SIGGRAPH ’98
+ * http://www.cse.ohio-state.edu/~hwshen/888_su02/hanson_note.pdf
+ *
+ * @param responseFactor Jmol uses 0.02 here
+ * @param dx
+ * @param dy
+ * @return true if successful; false if not;
+ */
+ public boolean setAsBallRotation(float responseFactor, float dx, float dy) {
+ float r = (float) Math.sqrt(dx * dx + dy * dy);
+ float th = r * responseFactor;
+ if (th == 0) {
+ setScale(1);
+ return false;
+ }
+ float c = (float) Math.cos(th);
+ float s = (float) Math.sin(th);
+ float nx = -dy / r;
+ float ny = dx / r;
+ float c1 = c - 1;
+ m00 = 1 + c1 * nx * nx;
+ m01 = m10 = c1 * nx * ny;
+ m20 = -(m02 = s * nx);
+ m11 = 1 + c1 * ny * ny;
+ m21 = -(m12 = s * ny);
+ m22 = c;
+ return true;
+ }
+
+ public boolean isRotation() {
+ return (Math.abs(determinant3() - 1) < 0.001f);
+ }
+
+}
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