A stealth-based 2D platformer where you don't have to kill anyone unless you want to.
https://www.semicolin.games
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126 lines
4.0 KiB
126 lines
4.0 KiB
using Microsoft.Xna.Framework;
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using Microsoft.VisualStudio.TestTools.UnitTesting;
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using System;
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namespace SemiColinGames.Tests {
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[TestClass]
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public class GeometryTests {
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[TestMethod]
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public void TestIntersectSegmentNotColliding() {
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AABB box = new AABB(new Vector2(0, 0), new Vector2(8, 8));
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Assert.IsNull(box.IntersectSegment(new Vector2(-16, -16), new Vector2(32, 0)));
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}
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[TestMethod]
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public void TestIntersectSegmentHit() {
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AABB box = new AABB(new Vector2(0, 0), new Vector2(8, 8));
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var point = new Vector2(-16, 4);
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var delta = new Vector2(32, 0);
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Hit? maybeHit = box.IntersectSegment(point, delta);
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Assert.IsNotNull(maybeHit);
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Hit hit = (Hit) maybeHit;
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Assert.AreEqual(box, hit.Collider);
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Assert.AreEqual(0.25, hit.Time);
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Assert.AreEqual(point.X + delta.X * hit.Time, hit.Position.X);
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Assert.AreEqual(point.Y + delta.Y * hit.Time, hit.Position.Y);
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Assert.AreEqual((1.0f - hit.Time) * -delta.X, hit.Delta.X);
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Assert.AreEqual((1.0f - hit.Time) * -delta.Y, hit.Delta.Y);
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Assert.AreEqual(-1, hit.Normal.X);
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Assert.AreEqual(0, hit.Normal.Y);
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}
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[TestMethod]
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public void TestIntersectSegmentFromInsideBox() {
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AABB box = new AABB(new Vector2(0, 0), new Vector2(8, 8));
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var point = new Vector2(-4, 4);
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var delta = new Vector2(32, 0);
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Hit? maybeHit = box.IntersectSegment(point, delta);
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Assert.IsNotNull(maybeHit);
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Hit hit = (Hit) maybeHit;
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Assert.AreEqual(box, hit.Collider);
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Assert.AreEqual(0.0, hit.Time);
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Assert.AreEqual(-4, hit.Position.X);
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Assert.AreEqual(4, hit.Position.Y);
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Assert.AreEqual(-delta.X, hit.Delta.X);
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Assert.AreEqual(-delta.Y, hit.Delta.Y);
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Assert.AreEqual(-1, hit.Normal.X);
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Assert.AreEqual(0, hit.Normal.Y);
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}
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[TestMethod]
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public void TestIntersectSegmentWithPadding() {
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AABB box = new AABB(new Vector2(0, 0), new Vector2(8, 8));
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var point = new Vector2(-16, 4);
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var delta = new Vector2(32, 0);
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int padding = 4;
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Hit? maybeHit = box.IntersectSegment(point, delta, new Vector2(padding, padding));
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Assert.IsNotNull(maybeHit);
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Hit hit = (Hit) maybeHit;
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Assert.AreEqual(box, hit.Collider);
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Assert.AreEqual(0.125, hit.Time);
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Assert.AreEqual(point.X + delta.X * hit.Time, hit.Position.X);
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Assert.AreEqual(point.Y + delta.Y * hit.Time, hit.Position.Y);
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Assert.AreEqual((1.0f - hit.Time) * -delta.X, hit.Delta.X);
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Assert.AreEqual((1.0f - hit.Time) * -delta.Y, hit.Delta.Y);
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Assert.AreEqual(-1, hit.Normal.X);
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Assert.AreEqual(0, hit.Normal.Y);
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}
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[TestMethod]
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public void TestIntersectSegmentFromTwoDirections() {
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AABB box = new AABB(new Vector2(0, 0), new Vector2(32, 32));
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var farPos = new Vector2(64, 0);
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var farToNearDelta = new Vector2(-32, 0);
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Assert.IsNull(box.IntersectSegment(farPos, farToNearDelta));
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var nearPos = new Vector2(32, 0);
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var nearToFarDelta = new Vector2(32, 0);
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Assert.IsNull(box.IntersectSegment(nearPos, nearToFarDelta));
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}
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[TestMethod]
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public void TestIntersectSegmentXAxisAligned() {
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AABB box = new AABB(new Vector2(0, 0), new Vector2(16, 16));
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var pos = new Vector2(-32, 0);
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var delta = new Vector2(64, 0);
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Hit? maybeHit = box.IntersectSegment(pos, delta);
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Assert.IsNotNull(maybeHit);
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Hit hit = (Hit) maybeHit;
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Assert.AreEqual(0.25, hit.Time);
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Assert.AreEqual(-1, hit.Normal.X);
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Assert.AreEqual(0, hit.Normal.Y);
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}
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[TestMethod]
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public void TestIntersectSegmentYAxisAligned() {
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AABB box = new AABB(new Vector2(0, 0), new Vector2(16, 16));
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var pos = new Vector2(0, -32);
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var delta = new Vector2(0, 64);
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Hit? maybeHit = box.IntersectSegment(pos, delta);
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Assert.IsNotNull(maybeHit);
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Hit hit = (Hit) maybeHit;
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Assert.AreEqual(0.25, hit.Time);
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Assert.AreEqual(0, hit.Normal.X);
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Assert.AreEqual(-1, hit.Normal.Y);
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}
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}
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}
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