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-// Copyright 2011 The Closure Library Authors. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS-IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-/**
- * @fileoverview WARNING: DEPRECATED. Use Mat3 instead.
- * Implements 3x3 matrices and their related functions which are
- * compatible with WebGL. The API is structured to avoid unnecessary memory
- * allocations. The last parameter will typically be the output vector and
- * an object can be both an input and output parameter to all methods except
- * where noted. Matrix operations follow the mathematical form when multiplying
- * vectors as follows: resultVec = matrix * vec.
- *
- */
-goog.provide('goog.vec.Matrix3');
-
-goog.require('goog.vec');
-
-
-/**
- * @typedef {goog.vec.ArrayType}
- */
-goog.vec.Matrix3.Type;
-
-
-/**
- * Creates the array representation of a 3x3 matrix. The use of the array
- * directly eliminates any overhead associated with the class representation
- * defined above. The returned matrix is cleared to all zeros.
- *
- * @return {goog.vec.Matrix3.Type} The new, nine element array.
- */
-goog.vec.Matrix3.create = function() {
- return new Float32Array(9);
-};
-
-
-/**
- * Creates the array representation of a 3x3 matrix. The use of the array
- * directly eliminates any overhead associated with the class representation
- * defined above. The returned matrix is initialized with the identity.
- *
- * @return {goog.vec.Matrix3.Type} The new, nine element array.
- */
-goog.vec.Matrix3.createIdentity = function() {
- var mat = goog.vec.Matrix3.create();
- mat[0] = mat[4] = mat[8] = 1;
- return mat;
-};
-
-
-/**
- * Creates a 3x3 matrix initialized from the given array.
- *
- * @param {goog.vec.ArrayType} matrix The array containing the
- * matrix values in column major order.
- * @return {goog.vec.Matrix3.Type} The new, nine element array.
- */
-goog.vec.Matrix3.createFromArray = function(matrix) {
- var newMatrix = goog.vec.Matrix3.create();
- goog.vec.Matrix3.setFromArray(newMatrix, matrix);
- return newMatrix;
-};
-
-
-/**
- * Creates a 3x3 matrix initialized from the given values.
- *
- * @param {number} v00 The values at (0, 0).
- * @param {number} v10 The values at (1, 0).
- * @param {number} v20 The values at (2, 0).
- * @param {number} v01 The values at (0, 1).
- * @param {number} v11 The values at (1, 1).
- * @param {number} v21 The values at (2, 1).
- * @param {number} v02 The values at (0, 2).
- * @param {number} v12 The values at (1, 2).
- * @param {number} v22 The values at (2, 2).
- * @return {goog.vec.Matrix3.Type} The new, nine element array.
- */
-goog.vec.Matrix3.createFromValues = function(
- v00, v10, v20, v01, v11, v21, v02, v12, v22) {
- var newMatrix = goog.vec.Matrix3.create();
- goog.vec.Matrix3.setFromValues(
- newMatrix, v00, v10, v20, v01, v11, v21, v02, v12, v22);
- return newMatrix;
-};
-
-
-/**
- * Creates a clone of a 3x3 matrix.
- *
- * @param {goog.vec.Matrix3.Type} matrix The source 3x3 matrix.
- * @return {goog.vec.Matrix3.Type} The new 3x3 element matrix.
- */
-goog.vec.Matrix3.clone =
- goog.vec.Matrix3.createFromArray;
-
-
-/**
- * Retrieves the element at the requested row and column.
- *
- * @param {goog.vec.ArrayType} mat The matrix containing the
- * value to retrieve.
- * @param {number} row The row index.
- * @param {number} column The column index.
- * @return {number} The element value at the requested row, column indices.
- */
-goog.vec.Matrix3.getElement = function(mat, row, column) {
- return mat[row + column * 3];
-};
-
-
-/**
- * Sets the element at the requested row and column.
- *
- * @param {goog.vec.ArrayType} mat The matrix containing the
- * value to retrieve.
- * @param {number} row The row index.
- * @param {number} column The column index.
- * @param {number} value The value to set at the requested row, column.
- */
-goog.vec.Matrix3.setElement = function(mat, row, column, value) {
- mat[row + column * 3] = value;
-};
-
-
-/**
- * Initializes the matrix from the set of values. Note the values supplied are
- * in column major order.
- *
- * @param {goog.vec.ArrayType} mat The matrix to receive the
- * values.
- * @param {number} v00 The values at (0, 0).
- * @param {number} v10 The values at (1, 0).
- * @param {number} v20 The values at (2, 0).
- * @param {number} v01 The values at (0, 1).
- * @param {number} v11 The values at (1, 1).
- * @param {number} v21 The values at (2, 1).
- * @param {number} v02 The values at (0, 2).
- * @param {number} v12 The values at (1, 2).
- * @param {number} v22 The values at (2, 2).
- */
-goog.vec.Matrix3.setFromValues = function(
- mat, v00, v10, v20, v01, v11, v21, v02, v12, v22) {
- mat[0] = v00;
- mat[1] = v10;
- mat[2] = v20;
- mat[3] = v01;
- mat[4] = v11;
- mat[5] = v21;
- mat[6] = v02;
- mat[7] = v12;
- mat[8] = v22;
-};
-
-
-/**
- * Sets the matrix from the array of values stored in column major order.
- *
- * @param {goog.vec.ArrayType} mat The matrix to receive the
- * values.
- * @param {goog.vec.ArrayType} values The column major ordered
- * array of values to store in the matrix.
- */
-goog.vec.Matrix3.setFromArray = function(mat, values) {
- mat[0] = values[0];
- mat[1] = values[1];
- mat[2] = values[2];
- mat[3] = values[3];
- mat[4] = values[4];
- mat[5] = values[5];
- mat[6] = values[6];
- mat[7] = values[7];
- mat[8] = values[8];
-};
-
-
-/**
- * Sets the matrix from the array of values stored in row major order.
- *
- * @param {goog.vec.ArrayType} mat The matrix to receive the
- * values.
- * @param {goog.vec.ArrayType} values The row major ordered array
- * of values to store in the matrix.
- */
-goog.vec.Matrix3.setFromRowMajorArray = function(mat, values) {
- mat[0] = values[0];
- mat[1] = values[3];
- mat[2] = values[6];
- mat[3] = values[1];
- mat[4] = values[4];
- mat[5] = values[7];
- mat[6] = values[2];
- mat[7] = values[5];
- mat[8] = values[8];
-};
-
-
-/**
- * Sets the diagonal values of the matrix from the given values.
- *
- * @param {goog.vec.ArrayType} mat The matrix to receive the
- * values.
- * @param {number} v00 The values for (0, 0).
- * @param {number} v11 The values for (1, 1).
- * @param {number} v22 The values for (2, 2).
- */
-goog.vec.Matrix3.setDiagonalValues = function(mat, v00, v11, v22) {
- mat[0] = v00;
- mat[4] = v11;
- mat[8] = v22;
-};
-
-
-/**
- * Sets the diagonal values of the matrix from the given vector.
- *
- * @param {goog.vec.ArrayType} mat The matrix to receive the
- * values.
- * @param {goog.vec.ArrayType} vec The vector containing the
- * values.
- */
-goog.vec.Matrix3.setDiagonal = function(mat, vec) {
- mat[0] = vec[0];
- mat[4] = vec[1];
- mat[8] = vec[2];
-};
-
-
-/**
- * Sets the specified column with the supplied values.
- *
- * @param {goog.vec.ArrayType} mat The matrix to recieve the
- * values.
- * @param {number} column The column index to set the values on.
- * @param {number} v0 The value for row 0.
- * @param {number} v1 The value for row 1.
- * @param {number} v2 The value for row 2.
- */
-goog.vec.Matrix3.setColumnValues = function(
- mat, column, v0, v1, v2) {
- var i = column * 3;
- mat[i] = v0;
- mat[i + 1] = v1;
- mat[i + 2] = v2;
-};
-
-
-/**
- * Sets the specified column with the value from the supplied array.
- *
- * @param {goog.vec.ArrayType} mat The matrix to receive the
- * values.
- * @param {number} column The column index to set the values on.
- * @param {goog.vec.ArrayType} vec The vector elements for the
- * column.
- */
-goog.vec.Matrix3.setColumn = function(mat, column, vec) {
- var i = column * 3;
- mat[i] = vec[0];
- mat[i + 1] = vec[1];
- mat[i + 2] = vec[2];
-};
-
-
-/**
- * Retrieves the specified column from the matrix into the given vector
- * array.
- *
- * @param {goog.vec.ArrayType} mat The matrix supplying the
- * values.
- * @param {number} column The column to get the values from.
- * @param {goog.vec.ArrayType} vec The vector elements to receive
- * the column.
- */
-goog.vec.Matrix3.getColumn = function(mat, column, vec) {
- var i = column * 3;
- vec[0] = mat[i];
- vec[1] = mat[i + 1];
- vec[2] = mat[i + 2];
-};
-
-
-/**
- * Sets the columns of the matrix from the set of vector elements.
- *
- * @param {goog.vec.ArrayType} mat The matrix to receive the
- * values.
- * @param {goog.vec.ArrayType} vec0 The values for column 0.
- * @param {goog.vec.ArrayType} vec1 The values for column 1.
- * @param {goog.vec.ArrayType} vec2 The values for column 2.
- */
-goog.vec.Matrix3.setColumns = function(
- mat, vec0, vec1, vec2) {
- goog.vec.Matrix3.setColumn(mat, 0, vec0);
- goog.vec.Matrix3.setColumn(mat, 1, vec1);
- goog.vec.Matrix3.setColumn(mat, 2, vec2);
-};
-
-
-/**
- * Retrieves the column values from the given matrix into the given vector
- * elements.
- *
- * @param {goog.vec.ArrayType} mat The matrix containing the
- * columns to retrieve.
- * @param {goog.vec.ArrayType} vec0 The vector elements to receive
- * column 0.
- * @param {goog.vec.ArrayType} vec1 The vector elements to receive
- * column 1.
- * @param {goog.vec.ArrayType} vec2 The vector elements to receive
- * column 2.
- */
-goog.vec.Matrix3.getColumns = function(
- mat, vec0, vec1, vec2) {
- goog.vec.Matrix3.getColumn(mat, 0, vec0);
- goog.vec.Matrix3.getColumn(mat, 1, vec1);
- goog.vec.Matrix3.getColumn(mat, 2, vec2);
-};
-
-
-/**
- * Sets the row values from the supplied values.
- *
- * @param {goog.vec.ArrayType} mat The matrix to receive the
- * values.
- * @param {number} row The index of the row to receive the values.
- * @param {number} v0 The value for column 0.
- * @param {number} v1 The value for column 1.
- * @param {number} v2 The value for column 2.
- */
-goog.vec.Matrix3.setRowValues = function(mat, row, v0, v1, v2) {
- mat[row] = v0;
- mat[row + 3] = v1;
- mat[row + 6] = v2;
-};
-
-
-/**
- * Sets the row values from the supplied vector.
- *
- * @param {goog.vec.ArrayType} mat The matrix to receive the
- * row values.
- * @param {number} row The index of the row.
- * @param {goog.vec.ArrayType} vec The vector containing the values.
- */
-goog.vec.Matrix3.setRow = function(mat, row, vec) {
- mat[row] = vec[0];
- mat[row + 3] = vec[1];
- mat[row + 6] = vec[2];
-};
-
-
-/**
- * Retrieves the row values into the given vector.
- *
- * @param {goog.vec.ArrayType} mat The matrix supplying the
- * values.
- * @param {number} row The index of the row supplying the values.
- * @param {goog.vec.ArrayType} vec The vector to receive the row.
- */
-goog.vec.Matrix3.getRow = function(mat, row, vec) {
- vec[0] = mat[row];
- vec[1] = mat[row + 3];
- vec[2] = mat[row + 6];
-};
-
-
-/**
- * Sets the rows of the matrix from the supplied vectors.
- *
- * @param {goog.vec.ArrayType} mat The matrix to receive the
- * values.
- * @param {goog.vec.ArrayType} vec0 The values for row 0.
- * @param {goog.vec.ArrayType} vec1 The values for row 1.
- * @param {goog.vec.ArrayType} vec2 The values for row 2.
- */
-goog.vec.Matrix3.setRows = function(
- mat, vec0, vec1, vec2) {
- goog.vec.Matrix3.setRow(mat, 0, vec0);
- goog.vec.Matrix3.setRow(mat, 1, vec1);
- goog.vec.Matrix3.setRow(mat, 2, vec2);
-};
-
-
-/**
- * Retrieves the rows of the matrix into the supplied vectors.
- *
- * @param {goog.vec.ArrayType} mat The matrix to supplying
- * the values.
- * @param {goog.vec.ArrayType} vec0 The vector to receive row 0.
- * @param {goog.vec.ArrayType} vec1 The vector to receive row 1.
- * @param {goog.vec.ArrayType} vec2 The vector to receive row 2.
- */
-goog.vec.Matrix3.getRows = function(
- mat, vec0, vec1, vec2) {
- goog.vec.Matrix3.getRow(mat, 0, vec0);
- goog.vec.Matrix3.getRow(mat, 1, vec1);
- goog.vec.Matrix3.getRow(mat, 2, vec2);
-};
-
-
-/**
- * Clears the given matrix to zero.
- *
- * @param {goog.vec.ArrayType} mat The matrix to clear.
- */
-goog.vec.Matrix3.setZero = function(mat) {
- mat[0] = 0;
- mat[1] = 0;
- mat[2] = 0;
- mat[3] = 0;
- mat[4] = 0;
- mat[5] = 0;
- mat[6] = 0;
- mat[7] = 0;
- mat[8] = 0;
-};
-
-
-/**
- * Sets the given matrix to the identity matrix.
- *
- * @param {goog.vec.ArrayType} mat The matrix to set.
- */
-goog.vec.Matrix3.setIdentity = function(mat) {
- mat[0] = 1;
- mat[1] = 0;
- mat[2] = 0;
- mat[3] = 0;
- mat[4] = 1;
- mat[5] = 0;
- mat[6] = 0;
- mat[7] = 0;
- mat[8] = 1;
-};
-
-
-/**
- * Performs a per-component addition of the matrices mat0 and mat1, storing
- * the result into resultMat.
- *
- * @param {goog.vec.ArrayType} mat0 The first addend.
- * @param {goog.vec.ArrayType} mat1 The second addend.
- * @param {goog.vec.ArrayType} resultMat The matrix to
- * receive the results (may be either mat0 or mat1).
- * @return {goog.vec.ArrayType} return resultMat so that operations can be
- * chained together.
- */
-goog.vec.Matrix3.add = function(mat0, mat1, resultMat) {
- resultMat[0] = mat0[0] + mat1[0];
- resultMat[1] = mat0[1] + mat1[1];
- resultMat[2] = mat0[2] + mat1[2];
- resultMat[3] = mat0[3] + mat1[3];
- resultMat[4] = mat0[4] + mat1[4];
- resultMat[5] = mat0[5] + mat1[5];
- resultMat[6] = mat0[6] + mat1[6];
- resultMat[7] = mat0[7] + mat1[7];
- resultMat[8] = mat0[8] + mat1[8];
- return resultMat;
-};
-
-
-/**
- * Performs a per-component subtraction of the matrices mat0 and mat1,
- * storing the result into resultMat.
- *
- * @param {goog.vec.ArrayType} mat0 The minuend.
- * @param {goog.vec.ArrayType} mat1 The subtrahend.
- * @param {goog.vec.ArrayType} resultMat The matrix to receive
- * the results (may be either mat0 or mat1).
- * @return {goog.vec.ArrayType} return resultMat so that operations can be
- * chained together.
- */
-goog.vec.Matrix3.subtract = function(mat0, mat1, resultMat) {
- resultMat[0] = mat0[0] - mat1[0];
- resultMat[1] = mat0[1] - mat1[1];
- resultMat[2] = mat0[2] - mat1[2];
- resultMat[3] = mat0[3] - mat1[3];
- resultMat[4] = mat0[4] - mat1[4];
- resultMat[5] = mat0[5] - mat1[5];
- resultMat[6] = mat0[6] - mat1[6];
- resultMat[7] = mat0[7] - mat1[7];
- resultMat[8] = mat0[8] - mat1[8];
- return resultMat;
-};
-
-
-/**
- * Performs a component-wise multiplication of mat0 with the given scalar
- * storing the result into resultMat.
- *
- * @param {goog.vec.ArrayType} mat0 The matrix to scale.
- * @param {number} scalar The scalar value to multiple to each element of mat0.
- * @param {goog.vec.ArrayType} resultMat The matrix to receive
- * the results (may be mat0).
- * @return {goog.vec.ArrayType} return resultMat so that operations can be
- * chained together.
- */
-goog.vec.Matrix3.scale = function(mat0, scalar, resultMat) {
- resultMat[0] = mat0[0] * scalar;
- resultMat[1] = mat0[1] * scalar;
- resultMat[2] = mat0[2] * scalar;
- resultMat[3] = mat0[3] * scalar;
- resultMat[4] = mat0[4] * scalar;
- resultMat[5] = mat0[5] * scalar;
- resultMat[6] = mat0[6] * scalar;
- resultMat[7] = mat0[7] * scalar;
- resultMat[8] = mat0[8] * scalar;
- return resultMat;
-};
-
-
-/**
- * Multiplies the two matrices mat0 and mat1 using matrix multiplication,
- * storing the result into resultMat.
- *
- * @param {goog.vec.ArrayType} mat0 The first (left hand) matrix.
- * @param {goog.vec.ArrayType} mat1 The second (right hand)
- * matrix.
- * @param {goog.vec.ArrayType} resultMat The matrix to receive
- * the results (may be either mat0 or mat1).
- * @return {goog.vec.ArrayType} return resultMat so that operations can be
- * chained together.
- */
-goog.vec.Matrix3.multMat = function(mat0, mat1, resultMat) {
- var a00 = mat0[0], a10 = mat0[1], a20 = mat0[2];
- var a01 = mat0[3], a11 = mat0[4], a21 = mat0[5];
- var a02 = mat0[6], a12 = mat0[7], a22 = mat0[8];
-
- var b00 = mat1[0], b10 = mat1[1], b20 = mat1[2];
- var b01 = mat1[3], b11 = mat1[4], b21 = mat1[5];
- var b02 = mat1[6], b12 = mat1[7], b22 = mat1[8];
-
- resultMat[0] = a00 * b00 + a01 * b10 + a02 * b20;
- resultMat[1] = a10 * b00 + a11 * b10 + a12 * b20;
- resultMat[2] = a20 * b00 + a21 * b10 + a22 * b20;
- resultMat[3] = a00 * b01 + a01 * b11 + a02 * b21;
- resultMat[4] = a10 * b01 + a11 * b11 + a12 * b21;
- resultMat[5] = a20 * b01 + a21 * b11 + a22 * b21;
- resultMat[6] = a00 * b02 + a01 * b12 + a02 * b22;
- resultMat[7] = a10 * b02 + a11 * b12 + a12 * b22;
- resultMat[8] = a20 * b02 + a21 * b12 + a22 * b22;
- return resultMat;
-};
-
-
-/**
- * Transposes the given matrix mat storing the result into resultMat.
- * @param {goog.vec.ArrayType} mat The matrix to transpose.
- * @param {goog.vec.ArrayType} resultMat The matrix to receive
- * the results (may be mat).
- * @return {goog.vec.ArrayType} return resultMat so that operations can be
- * chained together.
- */
-goog.vec.Matrix3.transpose = function(mat, resultMat) {
- if (resultMat == mat) {
- var a10 = mat[1], a20 = mat[2], a21 = mat[5];
- resultMat[1] = mat[3];
- resultMat[2] = mat[6];
- resultMat[3] = a10;
- resultMat[5] = mat[7];
- resultMat[6] = a20;
- resultMat[7] = a21;
- } else {
- resultMat[0] = mat[0];
- resultMat[1] = mat[3];
- resultMat[2] = mat[6];
- resultMat[3] = mat[1];
- resultMat[4] = mat[4];
- resultMat[5] = mat[7];
- resultMat[6] = mat[2];
- resultMat[7] = mat[5];
- resultMat[8] = mat[8];
- }
- return resultMat;
-};
-
-
-/**
- * Computes the inverse of mat0 storing the result into resultMat. If the
- * inverse is defined, this function returns true, false otherwise.
- * @param {goog.vec.ArrayType} mat0 The matrix to invert.
- * @param {goog.vec.ArrayType} resultMat The matrix to receive
- * the result (may be mat0).
- * @return {boolean} True if the inverse is defined. If false is returned,
- * resultMat is not modified.
- */
-goog.vec.Matrix3.invert = function(mat0, resultMat) {
- var a00 = mat0[0], a10 = mat0[1], a20 = mat0[2];
- var a01 = mat0[3], a11 = mat0[4], a21 = mat0[5];
- var a02 = mat0[6], a12 = mat0[7], a22 = mat0[8];
-
- var t00 = a11 * a22 - a12 * a21;
- var t10 = a12 * a20 - a10 * a22;
- var t20 = a10 * a21 - a11 * a20;
- var det = a00 * t00 + a01 * t10 + a02 * t20;
- if (det == 0) {
- return false;
- }
-
- var idet = 1 / det;
- resultMat[0] = t00 * idet;
- resultMat[3] = (a02 * a21 - a01 * a22) * idet;
- resultMat[6] = (a01 * a12 - a02 * a11) * idet;
-
- resultMat[1] = t10 * idet;
- resultMat[4] = (a00 * a22 - a02 * a20) * idet;
- resultMat[7] = (a02 * a10 - a00 * a12) * idet;
-
- resultMat[2] = t20 * idet;
- resultMat[5] = (a01 * a20 - a00 * a21) * idet;
- resultMat[8] = (a00 * a11 - a01 * a10) * idet;
- return true;
-};
-
-
-/**
- * Returns true if the components of mat0 are equal to the components of mat1.
- *
- * @param {goog.vec.ArrayType} mat0 The first matrix.
- * @param {goog.vec.ArrayType} mat1 The second matrix.
- * @return {boolean} True if the the two matrices are equivalent.
- */
-goog.vec.Matrix3.equals = function(mat0, mat1) {
- return mat0.length == mat1.length &&
- mat0[0] == mat1[0] && mat0[1] == mat1[1] && mat0[2] == mat1[2] &&
- mat0[3] == mat1[3] && mat0[4] == mat1[4] && mat0[5] == mat1[5] &&
- mat0[6] == mat1[6] && mat0[7] == mat1[7] && mat0[8] == mat1[8];
-};
-
-
-/**
- * Transforms the given vector with the given matrix storing the resulting,
- * transformed matrix into resultVec.
- *
- * @param {goog.vec.ArrayType} mat The matrix supplying the
- * transformation.
- * @param {goog.vec.ArrayType} vec The vector to transform.
- * @param {goog.vec.ArrayType} resultVec The vector to
- * receive the results (may be vec).
- * @return {goog.vec.ArrayType} return resultVec so that operations can be
- * chained together.
- */
-goog.vec.Matrix3.multVec3 = function(mat, vec, resultVec) {
- var x = vec[0], y = vec[1], z = vec[2];
- resultVec[0] = x * mat[0] + y * mat[3] + z * mat[6];
- resultVec[1] = x * mat[1] + y * mat[4] + z * mat[7];
- resultVec[2] = x * mat[2] + y * mat[5] + z * mat[8];
- return resultVec;
-};
-
-
-/**
- * Initializes the given 3x3 matrix as a translation matrix with x and y
- * translation values.
- *
- * @param {goog.vec.ArrayType} mat The 3x3 (9-element) matrix
- * array to receive the new translation matrix.
- * @param {number} x The translation along the x axis.
- * @param {number} y The translation along the y axis.
- */
-goog.vec.Matrix3.makeTranslate = function(mat, x, y) {
- goog.vec.Matrix3.setIdentity(mat);
- goog.vec.Matrix3.setColumnValues(mat, 2, x, y, 1);
-};
-
-
-/**
- * Initializes the given 3x3 matrix as a scale matrix with x, y and z scale
- * factors.
- * @param {goog.vec.ArrayType} mat The 3x3 (9-element) matrix
- * array to receive the new scale matrix.
- * @param {number} x The scale along the x axis.
- * @param {number} y The scale along the y axis.
- * @param {number} z The scale along the z axis.
- */
-goog.vec.Matrix3.makeScale = function(mat, x, y, z) {
- goog.vec.Matrix3.setIdentity(mat);
- goog.vec.Matrix3.setDiagonalValues(mat, x, y, z);
-};
-
-
-/**
- * Initializes the given 3x3 matrix as a rotation matrix with the given rotation
- * angle about the axis defined by the vector (ax, ay, az).
- * @param {goog.vec.ArrayType} mat The 3x3 (9-element) matrix
- * array to receive the new scale matrix.
- * @param {number} angle The rotation angle in radians.
- * @param {number} ax The x component of the rotation axis.
- * @param {number} ay The y component of the rotation axis.
- * @param {number} az The z component of the rotation axis.
- */
-goog.vec.Matrix3.makeAxisAngleRotate = function(
- mat, angle, ax, ay, az) {
- var c = Math.cos(angle);
- var d = 1 - c;
- var s = Math.sin(angle);
-
- goog.vec.Matrix3.setFromValues(mat,
- ax * ax * d + c,
- ax * ay * d + az * s,
- ax * az * d - ay * s,
-
- ax * ay * d - az * s,
- ay * ay * d + c,
- ay * az * d + ax * s,
-
- ax * az * d + ay * s,
- ay * az * d - ax * s,
- az * az * d + c);
-};