104 lines
3.1 KiB
C#
104 lines
3.1 KiB
C#
using System;
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using System.Collections.Generic;
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using UnityEngine;
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namespace Obi
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{
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public class ObiDistanceFieldHandle : ObiResourceHandle<ObiDistanceField>
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{
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public ObiDistanceFieldHandle(ObiDistanceField field, int index = -1) : base(index) { owner = field; }
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}
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public struct DistanceFieldHeader //we need to use the header in the backend, so it must be a struct.
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{
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public int firstNode;
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public int nodeCount;
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public DistanceFieldHeader(int firstNode, int nodeCount)
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{
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this.firstNode = firstNode;
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this.nodeCount = nodeCount;
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}
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}
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public class ObiDistanceFieldContainer
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{
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public Dictionary<ObiDistanceField, ObiDistanceFieldHandle> handles; /**< dictionary indexed by asset, so that we don't generate data for the same distance field multiple times.*/
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public ObiNativeDistanceFieldHeaderList headers; /**< One header per distance field.*/
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public ObiNativeDFNodeList dfNodes;
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public ObiDistanceFieldContainer()
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{
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handles = new Dictionary<ObiDistanceField, ObiDistanceFieldHandle>();
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headers = new ObiNativeDistanceFieldHeaderList();
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dfNodes = new ObiNativeDFNodeList();
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}
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public ObiDistanceFieldHandle GetOrCreateDistanceField(ObiDistanceField source)
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{
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ObiDistanceFieldHandle handle;
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if (!handles.TryGetValue(source, out handle))
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{
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handle = new ObiDistanceFieldHandle(source, headers.count);
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handles.Add(source, handle);
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headers.Add(new DistanceFieldHeader(dfNodes.count, source.nodes.Count));
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dfNodes.AddRange(source.nodes);
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}
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return handle;
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}
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public void DestroyDistanceField(ObiDistanceFieldHandle handle)
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{
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if (handle != null && handle.isValid && handle.index < handles.Count)
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{
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var header = headers[handle.index];
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// Update headers:
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for (int i = 0; i < headers.count; ++i)
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{
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var h = headers[i];
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if (h.firstNode > header.firstNode)
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{
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h.firstNode -= header.nodeCount;
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headers[i] = h;
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}
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}
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// update handles:
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foreach (var pair in handles)
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{
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if (pair.Value.index > handle.index)
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pair.Value.index--;
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}
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// Remove nodes
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dfNodes.RemoveRange(header.firstNode, header.nodeCount);
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// remove header:
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headers.RemoveAt(handle.index);
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// remove the mesh from the dictionary:
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handles.Remove(handle.owner);
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// Invalidate our handle:
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handle.Invalidate();
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}
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}
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public void Dispose()
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{
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if (headers != null)
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headers.Dispose();
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if (dfNodes != null)
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dfNodes.Dispose();
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}
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}
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}
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