Class TX3DNodesCache
Unit
X3DNodes
Declaration
type TX3DNodesCache = class(TTexturesVideosCache)
Description
Cache for X3D nodes. Descends from TTexturesVideosCache, so can also cache textures and movies.
Hierarchy
Overview
Fields
Methods
Description
Fields
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Log: Boolean; |
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Methods
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constructor Create; |
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destructor Destroy; override; |
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function LoadNode(const URL: String): TX3DRootNode; |
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Load model, just like X3DLoad.LoadNode but with a cache. URL must be absolute (not relative).
Note that this should not be used if you plan to modify the model graph (for example by VRML/X3D events). In such case, the cache should not be used, as it would make all the model instances shared. For example, if you inline the same model multiple times, you could not modify one instance independent from another.
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function IsCached(const URL: String): Boolean; |
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Is the given URL cached.
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function TryCopyNode(const URL: String): TX3DRootNode; |
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If the given URL is cached, return a DeepCopy of the node from cache. Otherwise returns Nil. This makes sense if you possibly already have this model in the cache, and now you want to load it again, *and* modify the X3D nodes tree afterwards.
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procedure FreeNode(var Node: TX3DRootNode); |
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Unload previously loaded here model. Node may be Nil (then it's ignored), or something loaded by LoadNode (then it's released and changed to Nil).
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function Empty: boolean; override; |
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