Class TShapeTreeTransform
Unit
Declaration
type TShapeTreeTransform = class(TShapeTreeGroup)
Description
Node of the TShapeTree transforming it's children. Use this to handle X3D TTransformNode and similar nodes (which define TTransformFunctionality).
Hierarchy
- TObject
- TShapeTree
- TShapeTreeGroup
- TShapeTreeTransform
Overview
Fields
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TransformNeedsUpdate: Boolean; |
Methods
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constructor Create(const AParentScene: TX3DEventsEngine); |
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destructor Destroy; override; |
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procedure FastTransformUpdate(var AnythingChanged: Boolean); virtual; |
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function DebugInfoWithoutChildren: String; override; |
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function TransformNode: TX3DNode; |
Properties
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property TransformFunctionality: TTransformFunctionality
read FTransformFunctionality write SetTransformFunctionality; |
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property TransformState: TX3DGraphTraverseState read FTransformState; |
Description
Fields
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TransformNeedsUpdate: Boolean; |
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Do we need call to FastTransformUpdateCore to recalculate our transformation (in TransformState.Transformation). | |
Methods
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constructor Create(const AParentScene: TX3DEventsEngine); |
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This item has no description. | |
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destructor Destroy; override; |
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This item has no description. | |
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procedure FastTransformUpdate(var AnythingChanged: Boolean); virtual; |
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Process transformation changes here and in child, if only TransformNeedsUpdate = true. This calls FastTransformUpdateCore if update is really necessary, which in turn will make real update, call FastTransformUpdateCore on all children, and set TransformNeedsUpdate = false. In effect, calling this may set TransformNeedsUpdate to false both on this instance, and on some children. This makes updating transformation hierarchy, from the instances with smallest Depth, and looking only at shapes with possibly TransformNeedsUpdate=true (stored in TransformationDirty by TCastleSceneCore) optimal: - We only enter subtrees with TransformNeedsUpdate=true, no need to process whole Shapes tree (esp. important if only a small subset of the transformations changed, e.g. we changed TTransformNode of one object in a model with 10000 objects). - We do not process the same subtree multiple times. This is especially important for typical skeletons (glTF Skin, H-Anim HAnimHumanoid, a regular Transform hierarchy with rigid objects, Spine JSON skeletons...) where usually every frame, many joints change transformation. In this case, | |
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function DebugInfoWithoutChildren: String; override; |
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This item has no description. Showing description inherited from TShapeTree.DebugInfoWithoutChildren. Describe this shape, not recursively. | |
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function TransformNode: TX3DNode; |
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This item has no description. | |
Properties
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property TransformFunctionality: TTransformFunctionality
read FTransformFunctionality write SetTransformFunctionality; |
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This item has no description. | |
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property TransformState: TX3DGraphTraverseState read FTransformState; |
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State right before traversing the TransformNode. Owned by this TShapeTreeTransform instance. You should assign to it when you set TransformNode. The TransformState.Transformation contains the parent transformation, before the effect of the node in TransformNode is applied. | |
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