scratchfoundation/paper.js
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Various clean-ups in Path.

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This commit is contained in:
Jürg Lehni 2011-03-02 17:23:45 +00:00
parent 311ae66a0f
commit 620cb2c754
1 changed files with 8 additions and 5 deletions
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13
src/path/Path.js
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@ -278,7 +278,8 @@ Path = PathItem.extend({
if (parameter == null) if (parameter == null)
parameter = 0.5; parameter = 0.5;
var current = this.currentSegment.point; var current = this.currentSegment.point;
// handle = (through - (1 - t)^2 * current - t^2 * to) / (2 * (1 - t) * t) // handle = (through - (1 - t)^2 * current - t^2 * to) /
// (2 * (1 - t) * t)
var t1 = 1 - parameter; var t1 = 1 - parameter;
var handle = through.subtract( var handle = through.subtract(
current.multiply(t1 * t1)).subtract( current.multiply(t1 * t1)).subtract(
@ -392,7 +393,8 @@ Path = PathItem.extend({
throughVector = Point.read(throughVector); throughVector = Point.read(throughVector);
toVector = Point.read(toVector); toVector = Point.read(toVector);
var current = this.currentSegment.point; var current = this.currentSegment.point;
this.curveTo(current.add(throughVector), current.add(toVector), parameter); this.curveTo(current.add(throughVector), current.add(toVector),
parameter);
}, },
arcBy: function(throughVector, toVector) { arcBy: function(throughVector, toVector) {
@ -444,7 +446,8 @@ Path = PathItem.extend({
var x = segment.point.x; var x = segment.point.x;
var y = segment.point.y; var y = segment.point.y;
var handleIn = segment.handleIn; var handleIn = segment.handleIn;
ctx.bezierCurveTo(outX, outY, handleIn.x + x, handleIn.y + y, x, y); ctx.bezierCurveTo(outX, outY, handleIn.x + x, handleIn.y + y,
x, y);
ctx.closePath(); ctx.closePath();
} }
if (!param.compound) { if (!param.compound) {
@ -464,7 +467,7 @@ Path = PathItem.extend({
} }
} }
}, new function() { // inject methods that require scoped privates }, new function() { // Inject methods that require scoped privates
/** /**
* Solves a tri-diagonal system for one of coordinates (x or y) of first * Solves a tri-diagonal system for one of coordinates (x or y) of first
* bezier control points. * bezier control points.
@ -472,7 +475,7 @@ Path = PathItem.extend({
* @param rhs right hand side vector. * @param rhs right hand side vector.
* @return Solution vector. * @return Solution vector.
*/ */
var getFirstControlPoints = function(rhs) { function getFirstControlPoints(rhs) {
var n = rhs.length; var n = rhs.length;
var x = []; // Solution vector. var x = []; // Solution vector.
var tmp = []; // Temporary workspace. var tmp = []; // Temporary workspace.