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Simplified Rectangle.js and pixelUtils

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juliandescottes
2012-09-14 22:20:00 +02:00
parent 9e03290df5
commit 813b60b854
5 changed files with 48 additions and 88 deletions
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57
js/utils/pixelUtils.js
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@ -4,22 +4,11 @@
ns.PixelUtils = {
getRectanglePixels : function (x0, y0, x1, y1) {
var rectangle = this.getOrderedRectangleCoordinates(x0, y0, x1, y1);
var pixels = [];
var swap;
if(x0 > x1) {
swap = x0;
x0 = x1;
x1 = swap;
}
if(y0 > y1) {
swap = y0;
y0 = y1;
y1 = swap;
}
for(var x = x0; x <= x1; x++) {
for(var y = y0; y <= y1; y++) {
for(var x = rectangle.x0; x <= rectangle.x1; x++) {
for(var y = rectangle.y0; y <= rectangle.y1; y++) {
pixels.push({"col": x, "row": y});
}
}
@ -28,33 +17,33 @@
},
getBoundRectanglePixels : function (x0, y0, x1, y1) {
var rectangle = this.getOrderedRectangleCoordinates(x0, y0, x1, y1);
var pixels = [];
var swap;
if(x0 > x1) {
swap = x0;
x0 = x1;
x1 = swap;
}
if(y0 > y1) {
swap = y0;
y0 = y1;
y1 = swap;
}
// Creating horizontal sides of the rectangle:
for(var x = x0; x <= x1; x++) {
pixels.push({"col": x, "row": y0});
pixels.push({"col": x, "row": y1});
for(var x = rectangle.x0; x <= rectangle.x1; x++) {
pixels.push({"col": x, "row": rectangle.y0});
pixels.push({"col": x, "row": rectangle.y1});
}
// Creating vertical sides of the rectangle:
for(var y = y0; y <= y1; y++) {
pixels.push({"col": x0, "row": y});
pixels.push({"col": x1, "row": y});
for(var y = rectangle.y0; y <= rectangle.y1; y++) {
pixels.push({"col": rectangle.x0, "row": y});
pixels.push({"col": rectangle.x1, "row": y});
}
return pixels;
}
},
/**
* Return an object of ordered rectangle coordinate.
* In returned object {x0, y0} => top left corner - {x1, y1} => bottom right corner
* @private
*/
getOrderedRectangleCoordinates : function (x0, y0, x1, y1) {
return {
x0 : Math.min(x0, x1), y0 : Math.min(y0, y1),
x1 : Math.max(x0, x1), y1 : Math.max(y0, y1),
};
}
};
})();