Class TTangentNode

Unit

X3DNodes

Declaration

type TTangentNode = class(TAbstractGeometricPropertyNode)

Description

Tangent vectors information, for bump mapping. The "vector" field should contain normalized tangent vectors, in right-handed coordinate system.

The ordering of the tangent vectors is exactly the same as ordering of normal vectors would be, so e.g. TAbstractComposedGeometryNode.NormalPerVertex affects the interpretation of tangent vectors as well.

Hierarchy

• TObject
• TPersistent
• TX3DFileItem
• TX3DNode
• TAbstractNode
• TAbstractGeometricPropertyNode
• TTangentNode

Overview

Methods

	procedure CreateNode; override;
	class function ClassX3DType: String; override;
	procedure SetVector(const Value: array of TVector3); overload;
	procedure SetVector(const Value: TVector3List); overload;
	procedure SetVector4D(const List: TVector4List);

Properties

property FdVector: TMFVec3f read FFdVector;

Description

Methods

	procedure CreateNode; override;
Create node fields and events.

	class function ClassX3DType: String; override;

	procedure SetVector(const Value: array of TVector3); overload;

	procedure SetVector(const Value: TVector3List); overload;

	procedure SetVector4D(const List: TVector4List);
Set tangent vectors from a list of 4D vectors following glTF specification. https://github.com/KhronosGroup/glTF/tree/master/specification/2.0 says "XYZW vertex tangents where the w component is a sign value (-1 or +1) indicating handedness of the tangent basis".

Properties

	property FdVector: TMFVec3f read FFdVector;
Internal wrapper for property Vector. This wrapper API may change, we advise to access simpler Vector instead, if it is defined (TODO: for now, some field types do not have a simpler counterpart).

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