/*
 * Paper.js - The Swiss Army Knife of Vector Graphics Scripting.
 * http://paperjs.org/
 *
 * Copyright (c) 2011 - 2014, Juerg Lehni & Jonathan Puckey
 * http://scratchdisk.com/ & http://jonathanpuckey.com/
 *
 * Distributed under the MIT license. See LICENSE file for details.
 *
 * All rights reserved.
 */

module('Curve');

test('Curve#getPointAt()', function() {
	var curve = new Path.Circle({
		center: [100, 100],
		radius: 100
	}).getFirstCurve();

	var points = [
		[0, new Point(0, 100)],
		[0.25, new Point(7.8585, 61.07549)],
		[0.5, new Point(29.28932, 29.28932)],
		[0.75, new Point(61.07549, 7.8585)],
		[1, new Point(100, 0)]
	];

	for (var i = 0; i < points.length; i++) {
		var entry = points[i];
		comparePoints(curve.getPointAt(entry[0], true), entry[1],
				'curve.getPointAt(' + entry[0] + ', true);');
	}
});

test('Curve#getTangentAt()', function() {
	var curve = new Path.Circle({
		center: [100, 100],
		radius: 100
	}).getFirstCurve();

	var tangents = [
		[0, new Point(0, -165.68542 )],
		[0.25, new Point(60.7233, -143.56602)],
		[0.5, new Point(108.57864, -108.57864)],
		[0.75, new Point(143.56602, -60.7233)],
		[1, new Point(165.68542, 0)]
	];

	for (var i = 0; i < tangents.length; i++) {
		var entry = tangents[i];
		comparePoints(curve.getTangentAt(entry[0], true), entry[1],
				'curve.getTangentAt(' + entry[0] + ', true);');
	}
});

test('Curve#getNormalAt()', function() {
	var curve = new Path.Circle({
		center: [100, 100],
		radius: 100
	}).getFirstCurve();

	var normals = [
		[0, new Point(-165.68542, 0)],
		[0.25, new Point(-143.56602, -60.7233)],
		[0.5, new Point(-108.57864, -108.57864)],
		[0.75, new Point(-60.7233, -143.56602)],
		[1, new Point(0, -165.68542)]
	];

	for (var i = 0; i < normals.length; i++) {
		var entry = normals[i];
		comparePoints(curve.getNormalAt(entry[0], true), entry[1],
				'curve.getNormalAt(' + entry[0] + ', true);');
	}
});

test('Curve#getCurvatureAt()', function() {
	var curve = new Path.Circle({
		center: [100, 100],
		radius: 100
	}).getFirstCurve();

	var curvatures = [
		[0, 0.009785533905932729],
		[0.25, 0.010062133221584524],
		[0.5, 0.009937576453041297],
		[0.75, 0.010062133221584524],
		[1, 0.009785533905932727]
	];

	for (var i = 0; i < curvatures.length; i++) {
		var entry = curvatures[i];
		compareNumbers(curve.getCurvatureAt(entry[0], true), entry[1],
				'curve.getCurvatureAt(' + entry[0] + ', true);');
	}
});


test('Curve#getCurvatureAt()', function() {
	var curve = new Path.Line({
		from: [100, 100],
		to: [200, 200],
	}).getFirstCurve();

	var curvatures = [
		[0, 0],
		[0.25, 0],
		[0.5, 0],
		[0.75, 0],
		[1, 0]
	];

	for (var i = 0; i < curvatures.length; i++) {
		var entry = curvatures[i];
		compareNumbers(curve.getCurvatureAt(entry[0], true), entry[1],
				'curve.getCurvatureAt(' + entry[0] + ', true);');
	}
});