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Introduce new TRIGONOMETRIC_EPSILON with higher precision than GEOMETRIC_EPSILON.

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This commit is contained in:
Jürg Lehni 2015-10-01 20:44:27 -05:00
parent f5012a78e9
commit 9b883e5fb6
3 changed files with 10 additions and 4 deletions
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4
src/basic/Point.js
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@ -708,7 +708,7 @@ var Point = Base.extend(/** @lends Point# */{
// TODO: Optimize by creating a static Point.isCollinear() to be used
// in Line.isCollinear() as well.
return Math.abs(this.normalize().cross(point.normalize()))
< /*#=*/Numerical.GEOMETRIC_EPSILON;
< /*#=*/Numerical.TRIGONOMETRIC_EPSILON;
},
// TODO: Remove version with typo after a while (deprecated June 2015)
@ -727,7 +727,7 @@ var Point = Base.extend(/** @lends Point# */{
// length.
// TODO: Optimize
return Math.abs(this.normalize().dot(point.normalize()))
< /*#=*/Numerical.GEOMETRIC_EPSILON;
< /*#=*/Numerical.TRIGONOMETRIC_EPSILON;
},
/**

4
src/path/Curve.js
View file

@ -916,7 +916,7 @@ statics: {
*/
isHorizontal: function() {
return this.isStraight() && Math.abs(this.getTangentAt(0.5, true).y)
< /*#=*/Numerical.GEOMETRIC_EPSILON;
< /*#=*/Numerical.TRIGONOMETRIC_EPSILON;
},
/**
@ -926,7 +926,7 @@ statics: {
*/
isVertical: function() {
return this.isStraight() && Math.abs(this.getTangentAt(0.5, true).x)
< /*#=*/Numerical.GEOMETRIC_EPSILON;
< /*#=*/Numerical.TRIGONOMETRIC_EPSILON;
}
}), /** @lends Curve# */{
// Explicitly deactivate the creation of beans, as we have functions here

6
src/util/Numerical.js
View file

@ -94,6 +94,12 @@ var Numerical = new function() {
* trial and error.
*/
GEOMETRIC_EPSILON: 1e-7,
/**
* The epsilon to be used when performing "trigonometric" checks, such
* as examining cross products to check for collinearity. This value is
* somewhat arbitrary and was chosen by trial and error.
*/
TRIGONOMETRIC_EPSILON: 1e-8,
/**
* MACHINE_EPSILON for a double precision (Javascript Number) is
* 2.220446049250313e-16. (try this in the js console)