sneak/SharedTests/GeometryTests.cs
Colin McMillen 57b65f559c rename Aabb -> AABB
GitOrigin-RevId: 37b49d7a3ff2b4d0cf3e14e4339316bc72e2785e
2020-02-13 14:53:19 -05:00

126 lines
4.0 KiB
C#

using Microsoft.Xna.Framework;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using System;
namespace SemiColinGames.Tests {
[TestClass]
public class GeometryTests {
[TestMethod]
public void TestIntersectSegmentNotColliding() {
AABB box = new AABB(new Vector2(0, 0), new Vector2(8, 8));
Assert.IsNull(box.IntersectSegment(new Vector2(-16, -16), new Vector2(32, 0)));
}
[TestMethod]
public void TestIntersectSegmentHit() {
AABB box = new AABB(new Vector2(0, 0), new Vector2(8, 8));
var point = new Vector2(-16, 4);
var delta = new Vector2(32, 0);
Hit? maybeHit = box.IntersectSegment(point, delta);
Assert.IsNotNull(maybeHit);
Hit hit = (Hit) maybeHit;
Assert.AreEqual(box, hit.Collider);
Assert.AreEqual(0.25, hit.Time);
Assert.AreEqual(point.X + delta.X * hit.Time, hit.Position.X);
Assert.AreEqual(point.Y + delta.Y * hit.Time, hit.Position.Y);
Assert.AreEqual((1.0f - hit.Time) * -delta.X, hit.Delta.X);
Assert.AreEqual((1.0f - hit.Time) * -delta.Y, hit.Delta.Y);
Assert.AreEqual(-1, hit.Normal.X);
Assert.AreEqual(0, hit.Normal.Y);
}
[TestMethod]
public void TestIntersectSegmentFromInsideBox() {
AABB box = new AABB(new Vector2(0, 0), new Vector2(8, 8));
var point = new Vector2(-4, 4);
var delta = new Vector2(32, 0);
Hit? maybeHit = box.IntersectSegment(point, delta);
Assert.IsNotNull(maybeHit);
Hit hit = (Hit) maybeHit;
Assert.AreEqual(box, hit.Collider);
Assert.AreEqual(0.0, hit.Time);
Assert.AreEqual(-4, hit.Position.X);
Assert.AreEqual(4, hit.Position.Y);
Assert.AreEqual(-delta.X, hit.Delta.X);
Assert.AreEqual(-delta.Y, hit.Delta.Y);
Assert.AreEqual(-1, hit.Normal.X);
Assert.AreEqual(0, hit.Normal.Y);
}
[TestMethod]
public void TestIntersectSegmentWithPadding() {
AABB box = new AABB(new Vector2(0, 0), new Vector2(8, 8));
var point = new Vector2(-16, 4);
var delta = new Vector2(32, 0);
int padding = 4;
Hit? maybeHit = box.IntersectSegment(point, delta, new Vector2(padding, padding));
Assert.IsNotNull(maybeHit);
Hit hit = (Hit) maybeHit;
Assert.AreEqual(box, hit.Collider);
Assert.AreEqual(0.125, hit.Time);
Assert.AreEqual(point.X + delta.X * hit.Time, hit.Position.X);
Assert.AreEqual(point.Y + delta.Y * hit.Time, hit.Position.Y);
Assert.AreEqual((1.0f - hit.Time) * -delta.X, hit.Delta.X);
Assert.AreEqual((1.0f - hit.Time) * -delta.Y, hit.Delta.Y);
Assert.AreEqual(-1, hit.Normal.X);
Assert.AreEqual(0, hit.Normal.Y);
}
[TestMethod]
public void TestIntersectSegmentFromTwoDirections() {
AABB box = new AABB(new Vector2(0, 0), new Vector2(32, 32));
var farPos = new Vector2(64, 0);
var farToNearDelta = new Vector2(-32, 0);
Assert.IsNull(box.IntersectSegment(farPos, farToNearDelta));
var nearPos = new Vector2(32, 0);
var nearToFarDelta = new Vector2(32, 0);
Assert.IsNull(box.IntersectSegment(nearPos, nearToFarDelta));
}
[TestMethod]
public void TestIntersectSegmentXAxisAligned() {
AABB box = new AABB(new Vector2(0, 0), new Vector2(16, 16));
var pos = new Vector2(-32, 0);
var delta = new Vector2(64, 0);
Hit? maybeHit = box.IntersectSegment(pos, delta);
Assert.IsNotNull(maybeHit);
Hit hit = (Hit) maybeHit;
Assert.AreEqual(0.25, hit.Time);
Assert.AreEqual(-1, hit.Normal.X);
Assert.AreEqual(0, hit.Normal.Y);
}
[TestMethod]
public void TestIntersectSegmentYAxisAligned() {
AABB box = new AABB(new Vector2(0, 0), new Vector2(16, 16));
var pos = new Vector2(0, -32);
var delta = new Vector2(0, 64);
Hit? maybeHit = box.IntersectSegment(pos, delta);
Assert.IsNotNull(maybeHit);
Hit hit = (Hit) maybeHit;
Assert.AreEqual(0.25, hit.Time);
Assert.AreEqual(0, hit.Normal.X);
Assert.AreEqual(-1, hit.Normal.Y);
}
}
}