Unit X3DCameraUtils

Classes, Interfaces, Objects and Records
Variables

Description

Utilities specifically for VRML/X3D cameras.

See also
For our general classes and utilities for camera handling.
Cameras to navigate in 3D space (TExamineCamera, TWalkCamera).

Uses

Overview

Functions and Procedures

function MakeCameraStr(const Version: TX3DCameraVersion; const Xml: boolean; const Position, Direction, Up, GravityUp: TVector3): string;
function MakeCameraNode(const Version: TX3DCameraVersion; const BaseUrl: string; const Position, Direction, Up, GravityUp: TVector3): TAbstractChildNode;
function MakeCameraNode(const Version: TX3DCameraVersion; const BaseUrl: string; const Position, Direction, Up, GravityUp: TVector3; out ViewpointNode: TAbstractViewpointNode): TAbstractChildNode;
function CameraNodeForWholeScene(const Version: TX3DCameraVersion; const BaseUrl: string; const Box: TBox3D; const WantedDirection, WantedUp: Integer; const WantedDirectionPositive, WantedUpPositive: boolean): TAbstractChildNode;
function MakeCameraNavNode(const Version: TX3DCameraVersion; const BaseUrl: string; const NavigationType: string; const WalkSpeed, VisibilityLimit: Single; const AvatarSize: TVector3; const Headlight: boolean): TNavigationInfoNode;

Types

TX3DCameraVersion = (...);

Constants

DefaultX3DCameraPosition: array [TX3DCameraVersion] of TVector3 = ( (Data: (0, 0, 1)), (Data: (0, 0, 10)) );
DefaultX3DCameraDirection: TVector3 = (Data: (0, 0, -1));
DefaultX3DCameraUp: TVector3 = (Data: (0, 1, 0));
DefaultX3DGravityUp: TVector3 = (Data: (0, 1, 0));

Description

Functions and Procedures

function MakeCameraStr(const Version: TX3DCameraVersion; const Xml: boolean; const Position, Direction, Up, GravityUp: TVector3): string;

Construct string with VRML/X3D node defining camera with given properties.

function MakeCameraNode(const Version: TX3DCameraVersion; const BaseUrl: string; const Position, Direction, Up, GravityUp: TVector3): TAbstractChildNode;

Construct TX3DNode defining camera with given properties.

Overloaded version with ViewpointNode parameter returns the TAbstractViewpointNode descendant that is (somewhere within) the returned node.

function MakeCameraNode(const Version: TX3DCameraVersion; const BaseUrl: string; const Position, Direction, Up, GravityUp: TVector3; out ViewpointNode: TAbstractViewpointNode): TAbstractChildNode;
 
function CameraNodeForWholeScene(const Version: TX3DCameraVersion; const BaseUrl: string; const Box: TBox3D; const WantedDirection, WantedUp: Integer; const WantedDirectionPositive, WantedUpPositive: boolean): TAbstractChildNode;

Make camera node (like MakeCameraNode) that makes the whole box nicely visible (like CameraViewpointForWholeScene).

function MakeCameraNavNode(const Version: TX3DCameraVersion; const BaseUrl: string; const NavigationType: string; const WalkSpeed, VisibilityLimit: Single; const AvatarSize: TVector3; const Headlight: boolean): TNavigationInfoNode;
 

Types

TX3DCameraVersion = (...);

Version of VRML/X3D camera definition.

Values
  • cvVrml1_Inventor
  • cvVrml2_X3d

Constants

DefaultX3DCameraPosition: array [TX3DCameraVersion] of TVector3 = ( (Data: (0, 0, 1)), (Data: (0, 0, 10)) );

Standard camera settings given by VRML/X3D specifications.

DefaultX3DCameraDirection: TVector3 = (Data: (0, 0, -1));
 
DefaultX3DCameraUp: TVector3 = (Data: (0, 1, 0));
 
DefaultX3DGravityUp: TVector3 = (Data: (0, 1, 0));
 

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