tv_xiaoyouxi/games/symdsb/frameworks/cocos2d-html5/TransformUtils.js

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/**
 * convert an affine transform object to a kmMat4 object
 * @param {cc.AffineTransform} trans
 * @param {cc.kmMat4} mat
 * @function
 */
cc.CGAffineToGL = function (trans, mat) {
    // | m[0] m[4] m[8]  m[12] |     | m11 m21 m31 m41 |     | a c 0 tx |
    // | m[1] m[5] m[9]  m[13] |     | m12 m22 m32 m42 |     | b d 0 ty |
    // | m[2] m[6] m[10] m[14] | <=> | m13 m23 m33 m43 | <=> | 0 0 1  0 |
    // | m[3] m[7] m[11] m[15] |     | m14 m24 m34 m44 |     | 0 0 0  1 |
    mat[2] = mat[3] = mat[6] = mat[7] = mat[8] = mat[9] = mat[11] = mat[14] = 0.0;
    mat[10] = mat[15] = 1.0;
    mat[0] = trans.a;
    mat[4] = trans.c;
    mat[12] = trans.tx;
    mat[1] = trans.b;
    mat[5] = trans.d;
    mat[13] = trans.ty;
};

/**
 * Convert a kmMat4 object to an affine transform object
 * @param {cc.kmMat4} mat
 * @param {cc.AffineTransform} trans
 * @function
 */
cc.GLToCGAffine = function (mat, trans) {
    trans.a = mat[0];
    trans.c = mat[4];
    trans.tx = mat[12];
    trans.b = mat[1];
    trans.d = mat[5];
    trans.ty = mat[13];
};