Class TLODNode

Unit

Declaration

type TLODNode = class(TAbstractGroupingNode)

Description

Provides various levels of detail for a given object, only one of which will be visible at a given time.

Note that it follows X3D naming. There were some differences between VRML 2.0 LOD and X3D LOD (TLODNode): "level" -> "children", so also "level_changed" -> "children_changed". In X3D "level_changed" indicates just integer. We don't implement VRML 97 version due to low usage.

Hierarchy

Overview

Methods

Protected function DirectEnumerateActive(Func: TEnumerateChildrenFunction): Pointer; override;
Public function TransformationChange: TNodeTransformationChange; override;
Public procedure CreateNode; override;
Public class function ClassX3DType: string; override;

Properties

Public property EventLevel_changed: TSFInt32Event read FEventLevel_changed;
Public property FdCenter: TSFVec3f read FFdCenter;
Public property FdForceTransitions: TSFBool read FFdForceTransitions;
Public property FdRange: TMFFloat read FFdRange;

Description

Methods

Protected function DirectEnumerateActive(Func: TEnumerateChildrenFunction): Pointer; override;

This item has no description. Showing description inherited from TX3DNode.DirectEnumerateActive.

Enumerate all active child nodes of given node.

"Active nodes" are the ones affecting current look or collisions, e.g. from Switch node only one child will be enumerated. See Traverse for more precise definition.

"Direct" means that this enumerates only direct descendants, i.e. this is not recursive. See methods like Traverse or EnumerateNodes if you want recursive behavior.

This can enumerate both VRML1Children nodes and nodes within TSFNode and TMFNode fields.

Default implementation in this class enumerates all Children nodes of VRML 1.0. If you need to remove some children for VRML 1.0 (e.g. for Switch or LOD nodes) or add some children for VRML 2.0 you have to override this. You do not need to call inherited when overriding this — in fact, you should not, if you want to omit some nodes.

Stops and returns immediately if Func returns non-nil for some child.

Public function TransformationChange: TNodeTransformationChange; override;

This item has no description.

Public procedure CreateNode; override;

Automatically generated node properties.

Do not edit this file manually! To add new properties: - add them to the text files in tools/internal/x3d-nodes-to-pascal/nodes-specification/ , - and regenerate include files by running x3d-nodes-to-pascal

Public class function ClassX3DType: string; override;

This item has no description. Showing description inherited from TX3DNode.ClassX3DType.

Node type name in VRML/X3D, for this class. Normal VRML/X3D node classes should override this to return something non-empty, and then X3DType automatically will return the same value.

Empty for classes that don't have a hardcoded VRML/X3D node name, like a special TX3DUnknownNode. Such special classes should override then X3DType to return actual non-empty name there.

You usually should call X3DType. The only use of this method is that it works on classes (it's "class function"), without needing at actual instance.

Properties

Public property EventLevel_changed: TSFInt32Event read FEventLevel_changed;

This item has no description.

Public property FdCenter: TSFVec3f read FFdCenter;

Internal wrapper for property Center. This wrapper API may change, we advise to access simpler Center instead.

Public property FdForceTransitions: TSFBool read FFdForceTransitions;

Internal wrapper for property ForceTransitions. This wrapper API may change, we advise to access simpler ForceTransitions instead.

Public property FdRange: TMFFloat read FFdRange;

Internal wrapper for property Range. This wrapper API may change, we advise to access simpler Range instead.


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