Class TAbstractViewpointNode
Unit
Declaration
type TAbstractViewpointNode = class(TAbstractBindableNode)
Description
Base type for viewpoints in X3D, which are locations from which the user may view the scene.
Hierarchy
- TObject
- TPersistent
- TX3DFileItem
- TX3DNode
- TAbstractNode
- TAbstractChildNode
- TAbstractBindableNode
- TAbstractViewpointNode
Overview
Methods
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constructor Create(const AX3DName: string = ''; const ABaseUrl: string = ''); override; |
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function TransformationChange: TNodeTransformationChange; override; |
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class function ProjectionType: TProjectionType; virtual; abstract; |
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procedure GetView(out CamPos, CamDir, CamUp, GravityUp: TVector3); |
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function SmartDescription: string; virtual; |
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function ProjectionMatrix: TMatrix4; virtual; |
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function ModelviewMatrix: TMatrix4; |
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function GetProjectorMatrix: TMatrix4; |
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procedure CreateNode; override; |
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class function ClassX3DType: string; override; |
Properties
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property Position: TVector3 read GetPosition write SetPosition; |
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property FdCenterOfRotation: TSFVec3f read FFdCenterOfRotation; |
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property CenterOfRotation: TVector3 read GetCenterOfRotation write SetCenterOfRotation; |
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property FdDescription: TSFString read FFdDescription; |
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property Description: String read GetDescription write SetDescription; |
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property FdJump: TSFBool read FFdJump; |
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property Jump: Boolean read GetJump write SetJump; |
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property FdOrientation: TSFRotation read FFdOrientation; |
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property Orientation: TVector4 read GetOrientation write SetOrientation; |
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property FdRetainUserOffsets: TSFBool read FFdRetainUserOffsets; |
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property RetainUserOffsets: Boolean read GetRetainUserOffsets write SetRetainUserOffsets; |
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property EventCameraMatrix: TSFMatrix4fEvent read FEventCameraMatrix; |
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property EventCameraInverseMatrix: TSFMatrix4fEvent read FEventCameraInverseMatrix; |
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property EventCameraRotationMatrix: TSFMatrix3fEvent read FEventCameraRotationMatrix; |
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property EventCameraRotationInverseMatrix: TSFMatrix3fEvent read FEventCameraRotationInverseMatrix; |
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property FdCameraMatrixSendAlsoOnOffscreenRendering: TSFBool read FFdCameraMatrixSendAlsoOnOffscreenRendering; |
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property CameraMatrixSendAlsoOnOffscreenRendering: Boolean read GetCameraMatrixSendAlsoOnOffscreenRendering write SetCameraMatrixSendAlsoOnOffscreenRendering; |
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property FdDirection: TMFVec3f read FFdDirection; |
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property FdUp: TMFVec3f read FFdUp; |
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property FdGravityUp: TSFVec3f read FFdGravityUp; |
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property GravityUp: TVector3 read GetGravityUp write SetGravityUp; |
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property FdGravityTransform: TSFBool read FFdGravityTransform; |
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property GravityTransform: Boolean read GetGravityTransform write SetGravityTransform; |
Description
Methods
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constructor Create(const AX3DName: string = ''; const ABaseUrl: string = ''); override; |
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function TransformationChange: TNodeTransformationChange; override; |
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class function ProjectionType: TProjectionType; virtual; abstract; |
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procedure GetView(out CamPos, CamDir, CamUp, GravityUp: TVector3); |
Calculate camera vectors (position, direction, up, gravity up). Follows VRML/X3D specification:
They are all then transformed by the current viewpoint transformation (determined by parent nodes like TTransformNode). One conclusion from the above is that the only way to change the gravity up vector (this determines in which direction viewer falls down) is to use the Transform node around the viewpoint node. Additionally, as an extension, we also look at FdDirection and FdUp and FdGravityUp vectors. See https://castle-engine.io/x3d_extensions.php#section_ext_cameras_alt_orient Returned CamDir, CamUp, GravityUp are always normalized. |
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function SmartDescription: string; virtual; |
Description generated smart (trying to use FdDescription field, falling back on other information to help user identify the node). |
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function ProjectionMatrix: TMatrix4; virtual; |
Matrices for projecting texture from this viewpoint, for ProjectedTextureCoordinate. Override |
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function ModelviewMatrix: TMatrix4; |
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function GetProjectorMatrix: TMatrix4; |
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procedure CreateNode; override; |
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class function ClassX3DType: string; override; |
Properties
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property Position: TVector3 read GetPosition write SetPosition; |
Position of the viewpoint. |
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property FdCenterOfRotation: TSFVec3f read FFdCenterOfRotation; |
Internal wrapper for property CenterOfRotation. This wrapper API may change, we advise to access simpler CenterOfRotation instead. |
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property CenterOfRotation: TVector3 read GetCenterOfRotation write SetCenterOfRotation; |
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property FdDescription: TSFString read FFdDescription; |
Internal wrapper for property Description. This wrapper API may change, we advise to access simpler Description instead. |
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property Description: String read GetDescription write SetDescription; |
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property FdJump: TSFBool read FFdJump; |
Internal wrapper for property Jump. This wrapper API may change, we advise to access simpler Jump instead. |
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property Jump: Boolean read GetJump write SetJump; |
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property FdOrientation: TSFRotation read FFdOrientation; |
Internal wrapper for property Orientation. This wrapper API may change, we advise to access simpler Orientation instead. |
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property Orientation: TVector4 read GetOrientation write SetOrientation; |
Orientation of the viewpoint, expressed as rotation to transform default direction and up (DefaultX3DCameraDirection, DefaultX3DCameraUp). |
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property FdRetainUserOffsets: TSFBool read FFdRetainUserOffsets; |
Internal wrapper for property RetainUserOffsets. This wrapper API may change, we advise to access simpler RetainUserOffsets instead. |
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property RetainUserOffsets: Boolean read GetRetainUserOffsets write SetRetainUserOffsets; |
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property EventCameraMatrix: TSFMatrix4fEvent read FEventCameraMatrix; |
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property EventCameraInverseMatrix: TSFMatrix4fEvent read FEventCameraInverseMatrix; |
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property EventCameraRotationMatrix: TSFMatrix3fEvent read FEventCameraRotationMatrix; |
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property EventCameraRotationInverseMatrix: TSFMatrix3fEvent read FEventCameraRotationInverseMatrix; |
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property FdCameraMatrixSendAlsoOnOffscreenRendering: TSFBool read FFdCameraMatrixSendAlsoOnOffscreenRendering; |
Internal wrapper for property CameraMatrixSendAlsoOnOffscreenRendering. This wrapper API may change, we advise to access simpler CameraMatrixSendAlsoOnOffscreenRendering instead. |
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property CameraMatrixSendAlsoOnOffscreenRendering: Boolean read GetCameraMatrixSendAlsoOnOffscreenRendering write SetCameraMatrixSendAlsoOnOffscreenRendering; |
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property FdDirection: TMFVec3f read FFdDirection; |
Internal wrapper for property |
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property FdUp: TMFVec3f read FFdUp; |
Internal wrapper for property |
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property FdGravityUp: TSFVec3f read FFdGravityUp; |
Internal wrapper for property GravityUp. This wrapper API may change, we advise to access simpler GravityUp instead. |
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property GravityUp: TVector3 read GetGravityUp write SetGravityUp; |
Warning: this symbol is deprecated. Specify the gravity vector explicitly. See https://castle-engine.io/x3d_implementation_navigation_extensions.php . |
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property FdGravityTransform: TSFBool read FFdGravityTransform; |
Internal wrapper for property GravityTransform. This wrapper API may change, we advise to access simpler GravityTransform instead. |
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property GravityTransform: Boolean read GetGravityTransform write SetGravityTransform; |
Should the gravity vector be affected by the viewpoint transformation, that is by the TTransformNode instances that contain this TAbstractViewpointNode. |
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