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Add option to round transformation matrix values

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Tom Payne
2013-01-09 11:31:03 +01:00
parent 0d1e6ea766
commit 8a4125281d
1 changed files with 36 additions and 9 deletions
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45
src/ol/dom/dom.js
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@@ -33,20 +33,47 @@ ol.dom.setTransform = function(element, value) {
/**
* @param {Element} element Element.
* @param {goog.vec.Mat4.AnyType} transform Matrix.
* @param {number=} opt_precision Precision.
*/
ol.dom.transformElement2D = function(element, transform) {
ol.dom.transformElement2D = function(element, transform, opt_precision) {
// using matrix() causes gaps in Chrome and Firefox on Mac OS X, so prefer
// matrix3d()
var i;
if (ol.dom.BrowserFeature.CAN_USE_CSS_TRANSFORM3D) {
ol.dom.setTransform(element, 'matrix3d(' + transform.join(',') + ')');
var value3D;
if (goog.isDef(opt_precision)) {
/** @type {Array.<string>} */
var strings3D = new Array(16);
for (i = 0; i < 16; ++i) {
strings3D[i] = transform[i].toFixed(opt_precision);
}
value3D = strings3D.join(',');
} else {
value3D = transform.join(',');
}
ol.dom.setTransform(element, 'matrix3d(' + value3D + ')');
} else if (ol.dom.BrowserFeature.CAN_USE_CSS_TRANSFORM) {
ol.dom.setTransform(element, 'matrix(' +
goog.vec.Mat4.getElement(transform, 0, 0) + ',' +
goog.vec.Mat4.getElement(transform, 1, 0) + ',' +
goog.vec.Mat4.getElement(transform, 0, 1) + ',' +
goog.vec.Mat4.getElement(transform, 1, 1) + ',' +
goog.vec.Mat4.getElement(transform, 0, 3) + ',' +
goog.vec.Mat4.getElement(transform, 1, 3) + ')');
/** @type {Array.<number>} */
var transform2D = [
goog.vec.Mat4.getElement(transform, 0, 0),
goog.vec.Mat4.getElement(transform, 1, 0),
goog.vec.Mat4.getElement(transform, 0, 1),
goog.vec.Mat4.getElement(transform, 1, 1),
goog.vec.Mat4.getElement(transform, 0, 3),
goog.vec.Mat4.getElement(transform, 1, 3)
];
var value2D;
if (goog.isDef(opt_precision)) {
/** @type {Array.<string>} */
var strings2D = new Array(6);
for (i = 0; i < 6; ++i) {
strings2D[i] = transform2D[i].toFixed(opt_precision);
}
value2D = strings2D.join(',');
} else {
value2D = transform2D.join(',');
}
ol.dom.setTransform(element, 'matrix(' + value2D + ')');
} else if (ol.dom.BrowserFeature.CAN_USE_MATRIX_FILTER) {
// http://msdn.microsoft.com/en-us/library/ms533014%28VS.85,loband%29.aspx
goog.asserts.assert(false); // FIXME