Puppet2D.Engine/Components/Colliders/BoxCollider.cs - master - EugenyCh7/Puppet2D.Net

Puppet2D.Engine/Components/Colliders/BoxCollider.cs

68 строк2 KB

Eugeny Chekmarev

++ Colliders

25 авг 2025, 11:35

25 авг 2025, 11:35c916015

using Puppet2D.Engine.Geometry;
using Puppet2D.Graphics;
using Puppet2D.System;

namespace Puppet2D.Engine.Components.Colliders
{
    public class BoxCollider : Collider
    {
        public float Height { get; set; }
        public float Width { get; set; }

        public Polygon GetPolygon()
        {
            return new Polygon(B2.ShapeGetPolygon(ShapeId.Value));
        }

        public override BoxCollider Clone()
        {
            return new BoxCollider
            {
                BodyShape = BodyShape.Clone(),
                Angle = Angle,
                Width = Width,
                Height = Height
            };
        }

        public override RectangleShape GetShape()
        {
            Vector2 size = new Vector2(Width, Height);
            return new RectangleShape(size)
            {
                Origin = size * 0.5f,
                Rotation = Angle * degreesInRadians
            };
        }

        public override RectangleShape GetBox()
        {
            Vector2 size = new Vector2(Width, Height);
            return new RectangleShape(size)
            {
                Origin = size * 0.5f,
                Rotation = Angle * degreesInRadians
            };
        }

        public override MassData ComputeMassData(float density)
        {
            unsafe
            {
                B2.Polygon polygon = Cast();
                return new MassData(B2.ComputePolygonMass(&polygon, density));
            }
        }

        internal B2.Polygon Cast()
        {
            B2.Polygon polygon = B2.MakeBox(Width * 0.5f, Height * 0.5f);
            for (int i = 0; i < polygon.count; i++)
            {
                polygon.vertices[i] = polygon.vertices[i].Rotate(Angle);
                polygon.normals[i] = polygon.normals[i].Rotate(Angle);
            }
            return polygon;
        }
    }
}