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Fixed the elusive crash when building.

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This commit is contained in:
be5invis 2015-11-28 09:13:14 +08:00
parent 3dc8a35782
commit 1bd35cd36b
27 changed files with 492 additions and 430 deletions
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72
support/transform.js
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@ -1,32 +1,48 @@
exports.transformPoint = function(tfm, pt){
return {
onCurve: pt.onCurve || false,
cubic: pt.cubic || false,
subdivided: pt.subdivided || false,
x : pt.x * tfm.xx + pt.y * tfm.yx + tfm.x,
y : pt.x * tfm.xy + pt.y * tfm.yy + tfm.y
}
var Point = require('./point');
function Transform(xx, yx, xy, yy, x, y){
this.xx = xx;
this.yx = yx;
this.xy = xy;
this.yy = yy;
this.x = x;
this.y = y;
}
exports.inverse = function(tfm){
Transform.prototype.inverse = function(){
return Transform.inverse(this)
}
module.exports = Transform
Transform.Id = function(){
return new Transform(1, 0, 0, 1, 0, 0);
}
Transform.transformPoint = function(tfm, pt){
return new Point(
pt.x * tfm.xx + pt.y * tfm.yx + tfm.x,
pt.x * tfm.xy + pt.y * tfm.yy + tfm.y,
pt.onCurve,
pt.cubic,
pt.subdivided
)
}
Transform.inverse = function(tfm){
var denom = tfm.xx * tfm.yy - tfm.xy * tfm.yx;
return {
xx : tfm.yy / denom,
yx : -tfm.yx / denom,
xy : -tfm.xy / denom,
yy : tfm.xx / denom,
x : -(tfm.x * tfm.yy - tfm.y * tfm.yx) / denom,
y : -(-tfm.x * tfm.xy + tfm.y * tfm.xx) / denom,
}
return new Transform (
tfm.yy / denom, -tfm.yx / denom,
-tfm.xy / denom, tfm.xx / denom,
-(tfm.x * tfm.yy - tfm.y * tfm.yx) / denom,
-(-tfm.x * tfm.xy + tfm.y * tfm.xx) / denom
)
}
exports.untransform = function(tfm, pt){
var xx = pt.x - tfm.x
var yy = pt.y - tfm.y
var denom = tfm.xx * tfm.yy - tfm.xy * tfm.yx
return {
onCurve: pt.onCurve || false,
cubic: pt.cubic || false,
subdivided: pt.subdivided || false,
x : (xx * tfm.yy - yy * tfm.yx) / denom,
y : (yy * tfm.xx - xx * tfm.xy) / denom
}
Transform.untransform = function(tfm, pt){
var xx = pt.x - tfm.x;
var yy = pt.y - tfm.y;
var denom = tfm.xx * tfm.yy - tfm.xy * tfm.yx;
return new Point(
(xx * tfm.yy - yy * tfm.yx) / denom,
(yy * tfm.xx - xx * tfm.xy) / denom,
pt.onCurve,
pt.cubic,
pt.subdivided
)
}