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Optimized getBounds, also allow container object to be passed to it.

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This commit is contained in:
Richard Davey 2017-02-24 01:58:27 +00:00
parent b6bef1ded9
commit cbeee62549
2 changed files with 31 additions and 29 deletions
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2
v3/src/checksum.js
View file

@ -1,4 +1,4 @@
var CHECKSUM = { var CHECKSUM = {
build: 'a913e160-fa32-11e6-a501-2b18fd50adf3' build: '675700d0-fa33-11e6-b99d-a10bc0cf71c4'
}; };
module.exports = CHECKSUM; module.exports = CHECKSUM;

58
v3/src/components/GetBounds.js
View file

@ -1,18 +1,23 @@
var GetBounds = { var GetBounds = {
getBounds: function () getBounds: function (output)
{ {
var r = this.rotation; if (output === undefined) { output = { x: 0, y: 0, width: 0, height: 0 }; }
var wct = this.width * Math.cos(r);
var hct = this.height * Math.cos(r);
var wst = this.width * Math.sin(r);
var hst = this.height * Math.sin(r);
var x = this.x; var x = this.x;
var y = this.y; var y = this.y;
var w = this.width;
var h = this.height;
var r = this.rotation;
var wct = w * Math.cos(r);
var hct = h * Math.cos(r);
var wst = w * Math.sin(r);
var hst = h * Math.sin(r);
var xMin = x; var xMin = x;
var xMax = x; var xMax = x;
var yMin = y; var yMin = y;
@ -35,30 +40,27 @@ var GetBounds = {
xMin = x - hst + wct; xMin = x - hst + wct;
} }
} }
else if (r > -1.5707963267948966)
{
// -90 < theta <= 0
yMin = y + wst;
yMax = y + hct;
xMax = x + wct - hst;
}
else else
{ {
if (r > -1.5707963267948966) // -180 <= theta <= -90
{ yMin = y + wst + hct;
// -90 < theta <= 0 xMin = x + wct;
yMin = y + wst; xMax = x - hst;
yMax = y + hct;
xMax = x + wct - hst;
}
else
{
// -180 <= theta <= -90
yMin = y + wst + hct;
xMin = x + wct;
xMax = x - hst;
}
} }
return { output.x = xMin;
x: xMin, output.y = yMin;
y: yMin, output.width = xMax - xMin;
width: xMax - xMin, output.height = yMax - yMin;
height: yMax - yMin
}; return output;
} }
}; };