77 lines
2.4 KiB
C#
77 lines
2.4 KiB
C#
using System;
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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 ObiTerrainShapeTracker : ObiShapeTracker
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{
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private bool heightmapDataHasChanged = false;
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ObiHeightFieldHandle handle;
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public ObiTerrainShapeTracker(ObiCollider source, TerrainCollider collider){
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this.source = source;
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this.collider = collider;
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}
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public void UpdateHeightData()
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{
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ObiColliderWorld.GetInstance().DestroyHeightField(handle);
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}
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public override bool UpdateIfNeeded ()
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{
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TerrainCollider terrain = collider as TerrainCollider;
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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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int resolution = terrain.terrainData.heightmapResolution;
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// get or create the heightfield:
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if (handle == null || !handle.isValid)
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{
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handle = world.GetOrCreateHeightField(terrain.terrainData);
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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.Heightmap;
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shape.filter = source.Filter;
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shape.flags = terrain.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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shape.size = terrain.terrainData.size;
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shape.center = new Vector4(resolution, resolution, resolution, resolution);
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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(terrain.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(terrain.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().DestroyHeightField(handle);
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}
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}
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}
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