84 lines
2.6 KiB
C#
84 lines
2.6 KiB
C#
using System;
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using System.Collections.Generic;
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using UnityEngine;
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using System.Runtime.InteropServices;
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namespace Obi{
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public class ObiMeshShapeTracker : ObiShapeTracker
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{
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ObiTriangleMeshHandle handle;
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public ObiMeshShapeTracker(ObiCollider source, MeshCollider collider){
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this.source = source;
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this.collider = collider;
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}
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/**
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* Forces the tracker to update mesh data during the next call to UpdateIfNeeded().
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*/
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public void UpdateMeshData()
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{
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ObiColliderWorld.GetInstance().DestroyTriangleMesh(handle);
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}
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public override bool UpdateIfNeeded ()
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{
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MeshCollider meshCollider = collider as MeshCollider;
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// retrieve collision world and index:
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var world = ObiColliderWorld.GetInstance();
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int index = source.Handle.index;
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// decrease reference count of current handle if the mesh data it points to is different
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// than the mesh used by the collider:
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if (handle != null && handle.owner != meshCollider.sharedMesh)
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{
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if (handle.Dereference())
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world.DestroyTriangleMesh(handle);
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}
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// get or create the mesh:
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if (handle == null || !handle.isValid)
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{
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handle = world.GetOrCreateTriangleMesh(meshCollider.sharedMesh);
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handle.Reference();
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}
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// update collider:
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var shape = world.colliderShapes[index];
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shape.type = ColliderShape.ShapeType.TriangleMesh;
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shape.filter = source.Filter;
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shape.flags = meshCollider.isTrigger ? 1 : 0;
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shape.rigidbodyIndex = source.Rigidbody != null ? source.Rigidbody.handle.index : -1;
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shape.materialIndex = source.CollisionMaterial != null ? source.CollisionMaterial.handle.index : -1;
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shape.contactOffset = source.Thickness;
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shape.dataIndex = handle.index;
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world.colliderShapes[index] = shape;
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// update bounds:
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var aabb = world.colliderAabbs[index];
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aabb.FromBounds(meshCollider.bounds, shape.contactOffset);
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world.colliderAabbs[index] = aabb;
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// update transform:
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var trfm = world.colliderTransforms[index];
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trfm.FromTransform(meshCollider.transform);
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world.colliderTransforms[index] = trfm;
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return true;
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}
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public override void Destroy()
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{
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base.Destroy();
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if (handle != null && handle.Dereference())
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ObiColliderWorld.GetInstance().DestroyTriangleMesh(handle);
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}
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}
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}
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