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Add a snapToZero rotation constraint

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This commit is contained in:
Éric Lemoine
2013-03-04 19:21:41 +01:00
parent 7d6d82519b
commit 1776d80cb9
4 changed files with 67 additions and 1 deletions
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36
test/spec/ol/rotationconstraint.test.js Normal file
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@@ -0,0 +1,36 @@
goog.provide('ol.test.RotationConstraint');
describe('ol.RotationConstraint', function() {
describe('SnapToZero', function() {
it('returns expected rotation value', function() {
var rotationConstraint = ol.RotationConstraint.createSnapToZero(0.3);
expect(rotationConstraint(0.1, 0)).toEqual(0);
expect(rotationConstraint(0.2, 0)).toEqual(0);
expect(rotationConstraint(0.3, 0)).toEqual(0);
expect(rotationConstraint(0.4, 0)).toEqual(0.4);
expect(rotationConstraint(-0.1, 0)).toEqual(0);
expect(rotationConstraint(-0.2, 0)).toEqual(0);
expect(rotationConstraint(-0.3, 0)).toEqual(0);
expect(rotationConstraint(-0.4, 0)).toEqual(-0.4);
expect(rotationConstraint(1, -0.9)).toEqual(0);
expect(rotationConstraint(1, -0.8)).toEqual(0);
// floating-point arithmetic
expect(rotationConstraint(1, -0.7)).not.toEqual(0);
expect(rotationConstraint(1, -0.6)).toEqual(0.4);
expect(rotationConstraint(-1, 0.9)).toEqual(0);
expect(rotationConstraint(-1, 0.8)).toEqual(0);
// floating-point arithmetic
expect(rotationConstraint(-1, 0.7)).not.toEqual(0);
expect(rotationConstraint(-1, 0.6)).toEqual(-0.4);
});
});
});
goog.require('ol.RotationConstraint');