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-/*
- * gleem -- OpenGL Extremely Easy-To-Use Manipulators.
- * Copyright (C) 1998-2003 Kenneth B. Russell ([email protected])
- *
- * Copying, distribution and use of this software in source and binary
- * forms, with or without modification, is permitted provided that the
- * following conditions are met:
- *
- * Distributions of source code must reproduce the copyright notice,
- * this list of conditions and the following disclaimer in the source
- * code header files; and Distributions of binary code must reproduce
- * the copyright notice, this list of conditions and the following
- * disclaimer in the documentation, Read me file, license file and/or
- * other materials provided with the software distribution.
- *
- * The names of Sun Microsystems, Inc. ("Sun") and/or the copyright
- * holder may not be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED "AS IS," WITHOUT A WARRANTY OF ANY
- * KIND. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
- * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, NON-INTERFERENCE, ACCURACY OF
- * INFORMATIONAL CONTENT OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. THE
- * COPYRIGHT HOLDER, SUN AND SUN'S LICENSORS SHALL NOT BE LIABLE FOR
- * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
- * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL THE
- * COPYRIGHT HOLDER, SUN OR SUN'S LICENSORS BE LIABLE FOR ANY LOST
- * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL,
- * CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND
- * REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR
- * INABILITY TO USE THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
- * OF SUCH DAMAGES. YOU ACKNOWLEDGE THAT THIS SOFTWARE IS NOT
- * DESIGNED, LICENSED OR INTENDED FOR USE IN THE DESIGN, CONSTRUCTION,
- * OPERATION OR MAINTENANCE OF ANY NUCLEAR FACILITY. THE COPYRIGHT
- * HOLDER, SUN AND SUN'S LICENSORS DISCLAIM ANY EXPRESS OR IMPLIED
- * WARRANTY OF FITNESS FOR SUCH USES.
- */
-
-package gleem.linalg;
-
-/** Arbitrary-size single-precision matrix class. Currently very
- simple and only supports a few needed operations. */
-
-public class Matf {
- private float[] data;
- private int nCol; // number of columns
- private int nRow; // number of columns
-
- public Matf(int nRow, int nCol) {
- data = new float[nRow * nCol];
- this.nCol = nCol;
- this.nRow = nRow;
- }
-
- public Matf(Matf arg) {
- nRow = arg.nRow;
- nCol = arg.nCol;
- data = new float[nRow * nCol];
- System.arraycopy(arg.data, 0, data, 0, data.length);
- }
-
- public int nRow() {
- return nRow;
- }
-
- public int nCol() {
- return nCol;
- }
-
- /** Gets the (i,j)th element of this matrix, where i is the row
- index and j is the column index */
- public float get(int i, int j) {
- return data[nCol * i + j];
- }
-
- /** Sets the (i,j)th element of this matrix, where i is the row
- index and j is the column index */
- public void set(int i, int j, float val) {
- data[nCol * i + j] = val;
- }
-
- /** Returns transpose of this matrix; creates new matrix */
- public Matf transpose() {
- Matf tmp = new Matf(nCol, nRow);
- for (int i = 0; i < nRow; i++) {
- for (int j = 0; j < nCol; j++) {
- tmp.set(j, i, get(i, j));
- }
- }
- return tmp;
- }
-
- /** Returns this * b; creates new matrix */
- public Matf mul(Matf b) throws DimensionMismatchException {
- if (nCol() != b.nRow())
- throw new DimensionMismatchException();
- Matf tmp = new Matf(nRow(), b.nCol());
- for (int i = 0; i < nRow(); i++) {
- for (int j = 0; j < b.nCol(); j++) {
- float val = 0;
- for (int t = 0; t < nCol(); t++) {
- val += get(i, t) * b.get(t, j);
- }
- tmp.set(i, j, val);
- }
- }
- return tmp;
- }
-
- /** Returns this * v, assuming v is a column vector. */
- public Vecf mul(Vecf v) throws DimensionMismatchException {
- if (nCol() != v.length()) {
- throw new DimensionMismatchException();
- }
- Vecf out = new Vecf(nRow());
- for (int i = 0; i < nRow(); i++) {
- float tmp = 0;
- for (int j = 0; j < nCol(); j++) {
- tmp += get(i, j) * v.get(j);
- }
- out.set(i, tmp);
- }
- return out;
- }
-
- /** If this is a 2x2 matrix, returns it as a Mat2f. */
- public Mat2f toMat2f() throws DimensionMismatchException {
- if (nRow() != 2 || nCol() != 2) {
- throw new DimensionMismatchException();
- }
- Mat2f tmp = new Mat2f();
- for (int i = 0; i < 2; i++) {
- for (int j = 0; j < 2; j++) {
- tmp.set(i, j, get(i, j));
- }
- }
- return tmp;
- }
-
- /** If this is a 3x3 matrix, returns it as a Mat3f. */
- public Mat3f toMat3f() throws DimensionMismatchException {
- if (nRow() != 3 || nCol() != 3) {
- throw new DimensionMismatchException();
- }
- Mat3f tmp = new Mat3f();
- for (int i = 0; i < 3; i++) {
- for (int j = 0; j < 3; j++) {
- tmp.set(i, j, get(i, j));
- }
- }
- return tmp;
- }
-
- /** If this is a 4x4 matrix, returns it as a Mat4f. */
- public Mat4f toMat4f() throws DimensionMismatchException {
- if (nRow() != 4 || nCol() != 4) {
- throw new DimensionMismatchException();
- }
- Mat4f tmp = new Mat4f();
- for (int i = 0; i < 4; i++) {
- for (int j = 0; j < 4; j++) {
- tmp.set(i, j, get(i, j));
- }
- }
- return tmp;
- }
-}