71 lines
2.3 KiB
C#
71 lines
2.3 KiB
C#
using System;
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using System.Collections.Generic;
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using Microsoft.Xna.Framework;
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using Syntriax.Engine.Core;
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using Syntriax.Engine.Core.Abstract;
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using Syntriax.Engine.Physics2D.Abstract;
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namespace Syntriax.Engine.Physics2D;
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public class Collider2DAABBBehaviour : BehaviourOverride, ICollider2D
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{
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public AABB AABBLocal { get; set; } = null!;
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public AABB AABBWorld { get; private set; } = null!;
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private IRigidBody2D? _rigidBody2D = null;
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private List<Vector2> vertices = new List<Vector2>(4);
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private IReadOnlyList<Vector2>? _verticesReadOnly = null;
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public IRigidBody2D? RigidBody2D
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{
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get
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{
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if (_rigidBody2D is null)
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BehaviourController.TryGetBehaviour(out _rigidBody2D);
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return _rigidBody2D;
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}
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}
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public Action<ICollider2D, ICollider2D>? OnCollisionPreResolve { get; set; } = null;
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public Action<IAssignableTransform>? OnTransformAssigned { get => GameObject.OnTransformAssigned; set => GameObject.OnTransformAssigned = value; }
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ITransform IAssignableTransform.Transform => Transform;
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public bool Assign(ITransform transform) => GameObject.Assign(transform);
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public IReadOnlyList<Vector2> Vertices { get { if (_verticesReadOnly is null) _verticesReadOnly = vertices.AsReadOnly(); return _verticesReadOnly; } }
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public bool CheckCollision(Vector2 point)
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{
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return AABBWorld.Inside(point);
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}
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public void Recalculate()
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{
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AABBWorld = new AABB(
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AABBLocal.LowerBoundary.Scale(Transform.Scale) + Transform.Position,
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AABBLocal.UpperBoundary.Scale(Transform.Scale) + Transform.Position
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);
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vertices.Clear();
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vertices.Add(AABBWorld.LowerBoundary);
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vertices.Add(new(AABBWorld.LowerBoundary.X, AABBWorld.UpperBoundary.Y));
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vertices.Add(AABBWorld.UpperBoundary);
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vertices.Add(new(AABBWorld.LowerBoundary.Y, AABBWorld.UpperBoundary.X));
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}
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public Collider2DAABBBehaviour(Vector2 lowerBoundary, Vector2 upperBoundary)
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{
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AABBLocal = new AABB(lowerBoundary, upperBoundary);
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AABBWorld = new AABB(lowerBoundary, upperBoundary);
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}
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public Collider2DAABBBehaviour()
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{
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AABBLocal = new(Vector2.Zero, Vector2.Zero);
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AABBWorld = new(Vector2.Zero, Vector2.Zero);
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}
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}
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