MoonTools.Curve/Test/CubicBezierCurve2D.cs

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using NUnit.Framework;
using FluentAssertions;
using MoonTools.Core.Curve;
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using System;
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using System.Numerics;
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namespace Tests
{
public class CubicBezierCurve2DTests
{
[Test]
public void Point()
{
var p0 = new Vector2(-4, -4);
var p1 = new Vector2(-2, 4);
var p2 = new Vector2(2, -4);
var p3 = new Vector2(4, 4);
CubicBezierCurve2D.Point(p0, p1, p2, p3, 0.5f).Should().BeEquivalentTo(new Vector2(0, 0));
CubicBezierCurve2D.Point(p0, p1, p2, p3, 0.5f).Should().BeEquivalentTo(new Vector2(0, 0));
CubicBezierCurve2D.Point(p0, p1, p2, p3, 0.25f).Should().BeEquivalentTo(new Vector2(-2.1875f, -0.5f));
CubicBezierCurve2D.Point(p0, p1, p2, p3, 0.75f).Should().BeEquivalentTo(new Vector2(2.1875f, 0.5f));
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Action invalidTime = () => CubicBezierCurve2D.Point(p0, p1, p2, p3, 1.5f);
invalidTime.Should().Throw<ArgumentException>();
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}
[Test]
public void PointNormalized()
{
var p0 = new Vector2(-4, -4);
var p1 = new Vector2(-2, 4);
var p2 = new Vector2(2, -4);
var p3 = new Vector2(4, 4);
CubicBezierCurve2D.Point(p0, p1, p2, p3, 3, 2, 4).Should().BeEquivalentTo(new Vector2(0, 0));
CubicBezierCurve2D.Point(p0, p1, p2, p3, 2, 1, 5).Should().BeEquivalentTo(new Vector2(-2.1875f, -0.5f));
CubicBezierCurve2D.Point(p0, p1, p2, p3, 11, 2, 14).Should().BeEquivalentTo(new Vector2(2.1875f, 0.5f));
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Action invalidTime = () => CubicBezierCurve2D.Point(p0, p1, p2, p3, 15, 2, 5);
invalidTime.Should().Throw<ArgumentException>();
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}
[Test]
public void Velocity()
{
var p0 = new Vector2(-4, -4);
var p1 = new Vector2(-2, 4);
var p2 = new Vector2(2, -4);
var p3 = new Vector2(4, 4);
CubicBezierCurve2D.Velocity(p0, p1, p2, p3, 0.5f).Should().BeEquivalentTo(new Vector2(9, 0));
CubicBezierCurve2D.Velocity(p0, p1, p2, p3, 0.25f).Should().BeEquivalentTo(new Vector2(8.25f, 6f));
CubicBezierCurve2D.Velocity(p0, p1, p2, p3, 0.75f).Should().BeEquivalentTo(new Vector2(8.25f, 6f));
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Action invalidTime = () => CubicBezierCurve2D.Velocity(p0, p1, p2, p3, 1.5f);
invalidTime.Should().Throw<ArgumentException>();
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}
[Test]
public void VelocityNormalized()
{
var p0 = new Vector2(-4, -4);
var p1 = new Vector2(-2, 4);
var p2 = new Vector2(2, -4);
var p3 = new Vector2(4, 4);
CubicBezierCurve2D.Velocity(p0, p1, p2, p3, 3, 2, 4).Should().BeEquivalentTo(new Vector2(9, 0));
CubicBezierCurve2D.Velocity(p0, p1, p2, p3, 2, 1, 5).Should().BeEquivalentTo(new Vector2(8.25f, 6f));
CubicBezierCurve2D.Velocity(p0, p1, p2, p3, 11, 2, 14).Should().BeEquivalentTo(new Vector2(8.25f, 6f));
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Action invalidTime = () => CubicBezierCurve2D.Velocity(p0, p1, p2, p3, 15, 2, 5);
invalidTime.Should().Throw<ArgumentException>();
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}
}
public class CubicBezierCurve2DStructTests
{
[Test]
public void Point()
{
var myCurve = new CubicBezierCurve2D(
new Vector2(-4, -4),
new Vector2(-2, 4),
new Vector2(2, -4),
new Vector2(4, 4)
);
myCurve.Point(0.5f).Should().BeEquivalentTo(new Vector2(0, 0));
myCurve.Point(0.25f).Should().BeEquivalentTo(new Vector2(-2.1875f, -0.5f));
myCurve.Point(0.75f).Should().BeEquivalentTo(new Vector2(2.1875f, 0.5f));
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myCurve.Invoking(x => x.Point(1.5f)).Should().Throw<ArgumentException>();
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}
[Test]
public void PointNormalized()
{
var myCurve = new CubicBezierCurve2D(
new Vector2(-4, -4),
new Vector2(-2, 4),
new Vector2(2, -4),
new Vector2(4, 4)
);
myCurve.Point(3, 2, 4).Should().BeEquivalentTo(new Vector2(0, 0));
myCurve.Point(2, 1, 5).Should().BeEquivalentTo(new Vector2(-2.1875f, -0.5f));
myCurve.Point(11, 2, 14).Should().BeEquivalentTo(new Vector2(2.1875f, 0.5f));
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myCurve.Invoking(x => x.Point(15, 2, 4)).Should().Throw<ArgumentException>();
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}
[Test]
public void Velocity()
{
var myCurve = new CubicBezierCurve2D(
new Vector2(-4, -4),
new Vector2(-2, 4),
new Vector2(2, -4),
new Vector2(4, 4)
);
myCurve.Velocity(0.5f).Should().BeEquivalentTo(new Vector2(9, 0));
myCurve.Velocity(0.25f).Should().BeEquivalentTo(new Vector2(8.25f, 6f));
myCurve.Velocity(0.75f).Should().BeEquivalentTo(new Vector2(8.25f, 6f));
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myCurve.Invoking(x => x.Velocity(1.5f)).Should().Throw<ArgumentException>();
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}
[Test]
public void VelocityNormalized()
{
var myCurve = new CubicBezierCurve2D(
new Vector2(-4, -4),
new Vector2(-2, 4),
new Vector2(2, -4),
new Vector2(4, 4)
);
myCurve.Velocity(3, 2, 4).Should().BeEquivalentTo(new Vector2(9, 0));
myCurve.Velocity(2, 1, 5).Should().BeEquivalentTo(new Vector2(8.25f, 6f));
myCurve.Velocity(11, 2, 14).Should().BeEquivalentTo(new Vector2(8.25f, 6f));
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myCurve.Invoking(x => x.Velocity(15, 2, 5)).Should().Throw<ArgumentException>();
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}
}
}