83 lines
2.8 KiB
JavaScript
83 lines
2.8 KiB
JavaScript
goog.provide('ol.vec.Mat4');
|
|
|
|
goog.require('goog.vec.Mat4');
|
|
|
|
|
|
/**
|
|
* @param {!goog.vec.Mat4.Number} mat Matrix.
|
|
* @param {number} translateX1 Translate X1.
|
|
* @param {number} translateY1 Translate Y1.
|
|
* @param {number} scaleX Scale X.
|
|
* @param {number} scaleY Scale Y.
|
|
* @param {number} rotation Rotation.
|
|
* @param {number} translateX2 Translate X2.
|
|
* @param {number} translateY2 Translate Y2.
|
|
* @return {!goog.vec.Mat4.Number} Matrix.
|
|
*/
|
|
ol.vec.Mat4.makeTransform2D = function(mat, translateX1, translateY1,
|
|
scaleX, scaleY, rotation, translateX2, translateY2) {
|
|
goog.vec.Mat4.makeIdentity(mat);
|
|
if (translateX1 !== 0 || translateY1 !== 0) {
|
|
goog.vec.Mat4.translate(mat, translateX1, translateY1, 0);
|
|
}
|
|
if (scaleX != 1 || scaleY != 1) {
|
|
goog.vec.Mat4.scale(mat, scaleX, scaleY, 1);
|
|
}
|
|
if (rotation !== 0) {
|
|
goog.vec.Mat4.rotateZ(mat, rotation);
|
|
}
|
|
if (translateX2 !== 0 || translateY2 !== 0) {
|
|
goog.vec.Mat4.translate(mat, translateX2, translateY2, 0);
|
|
}
|
|
return mat;
|
|
};
|
|
|
|
|
|
/**
|
|
* Returns true if mat1 and mat2 represent the same 2D transformation.
|
|
* @param {goog.vec.Mat4.Number} mat1 Matrix 1.
|
|
* @param {goog.vec.Mat4.Number} mat2 Matrix 2.
|
|
* @return {boolean} Equal 2D.
|
|
*/
|
|
ol.vec.Mat4.equals2D = function(mat1, mat2) {
|
|
return (
|
|
goog.vec.Mat4.getElement(mat1, 0, 0) ==
|
|
goog.vec.Mat4.getElement(mat2, 0, 0) &&
|
|
goog.vec.Mat4.getElement(mat1, 1, 0) ==
|
|
goog.vec.Mat4.getElement(mat2, 1, 0) &&
|
|
goog.vec.Mat4.getElement(mat1, 0, 1) ==
|
|
goog.vec.Mat4.getElement(mat2, 0, 1) &&
|
|
goog.vec.Mat4.getElement(mat1, 1, 1) ==
|
|
goog.vec.Mat4.getElement(mat2, 1, 1) &&
|
|
goog.vec.Mat4.getElement(mat1, 0, 3) ==
|
|
goog.vec.Mat4.getElement(mat2, 0, 3) &&
|
|
goog.vec.Mat4.getElement(mat1, 1, 3) ==
|
|
goog.vec.Mat4.getElement(mat2, 1, 3));
|
|
};
|
|
|
|
|
|
/**
|
|
* Transforms the given vector with the given matrix storing the resulting,
|
|
* transformed vector into resultVec. The input vector is multiplied against the
|
|
* upper 2x4 matrix omitting the projective component.
|
|
*
|
|
* @param {goog.vec.Mat4.Number} mat The matrix supplying the transformation.
|
|
* @param {Array.<number>} vec The 3 element vector to transform.
|
|
* @param {Array.<number>} resultVec The 3 element vector to receive the results
|
|
* (may be vec).
|
|
* @return {Array.<number>} return resultVec so that operations can be
|
|
* chained together.
|
|
*/
|
|
ol.vec.Mat4.multVec2 = function(mat, vec, resultVec) {
|
|
var m00 = goog.vec.Mat4.getElement(mat, 0, 0);
|
|
var m10 = goog.vec.Mat4.getElement(mat, 1, 0);
|
|
var m01 = goog.vec.Mat4.getElement(mat, 0, 1);
|
|
var m11 = goog.vec.Mat4.getElement(mat, 1, 1);
|
|
var m03 = goog.vec.Mat4.getElement(mat, 0, 3);
|
|
var m13 = goog.vec.Mat4.getElement(mat, 1, 3);
|
|
var x = vec[0], y = vec[1];
|
|
resultVec[0] = m00 * x + m01 * y + m03;
|
|
resultVec[1] = m10 * x + m11 * y + m13;
|
|
return resultVec;
|
|
};
|