Class TCastleHingeJoint

Unit

Declaration

type TCastleHingeJoint = class(TCastleAbstractTwoBodiesJoint)

Description

Hinge joint allows to rotate the transformation around a given axis, like a door attached using hinges to the frame. Anchor determines the rotation point and Axis the axis direction.

Hierarchy

Overview

Methods

Protected function GetKraftJoint: TKraftConstraintJoint; override;
Protected procedure CreateKraftJoint; override;
Protected procedure DeinitializeKraftJoint; override;
Protected procedure SetName(const Value: TComponentName); override;
Public constructor Create(AOwner: TComponent); override;
Public destructor Destroy; override;
Public procedure WorldBeforeDetach; override;
Public procedure InternalCreateGizmos; override;
Public procedure InternalDestroyGizmos; override;
Public function PropertySections(const PropertyName: String): TPropertySections; override;

Properties

Public property Anchor: TVector3 read FAnchor write SetAnchor;
Public property Axis: TVector3 read FAxis write SetAxis;
Published property AngleLimits: Boolean read FAngleLimits write SetAngleLimits default false;
Published property MinAngle: Single read FMinAngle write SetMinAngle default 0.0;
Published property MaxAngle: Single read FMaxAngle write SetMaxAngle default 0.0;
Published property AnchorPersistent: TCastleVector3Persistent read FAnchorPersistent ;
Published property AxisPersistent: TCastleVector3Persistent read FAxisPersistent ;

Description

Methods

Protected function GetKraftJoint: TKraftConstraintJoint; override;

This item has no description. Showing description inherited from TCastleAbstractJoint.GetKraftJoint.

Get physics engine (Kraft) joint instance.

Protected procedure CreateKraftJoint; override;

This item has no description. Showing description inherited from TCastleAbstractJoint.CreateKraftJoint.

Create physics engine (Kraft) joint and set its specialized properties.

Protected procedure DeinitializeKraftJoint; override;

This item has no description.

Protected procedure SetName(const Value: TComponentName); override;

This item has no description.

Public constructor Create(AOwner: TComponent); override;

This item has no description.

Public destructor Destroy; override;

This item has no description.

Public procedure WorldBeforeDetach; override;

This item has no description. Showing description inherited from TCastleBehavior.WorldBeforeDetach.

Called before Parent stops being part of World. Called only if ListenWorldChange is True.

This is also called at the destruction of behavior (more precisely from BeforeDestruction now). Even in this case, we guarantee that Parent is still valid during this call, and not in half-destroyed state. Before the actual destructor of TCastleBehavior we do BeforeParentDetach and BeforeWorldDetach and set Parent to Nil.

Public procedure InternalCreateGizmos; override;

This item has no description. Showing description inherited from TCastleAbstractJoint.InternalCreateGizmos.

Create design-time transformations that are displayed in the hierarchy to visualize physics joints 3D points. If you want to visualize the behavior using a visible TCastleTransform, then create and add to Parent a descendant of TCastleJointTool, and set InternalCastleDesignInvalidate to True.

Public procedure InternalDestroyGizmos; override;

This item has no description. Showing description inherited from TCastleAbstractJoint.InternalDestroyGizmos.

Destroy design-time stuff. You can destroy any component, just be sure to set InternalCastleDesignInvalidate to True.

Public function PropertySections(const PropertyName: String): TPropertySections; override;

This item has no description. Showing description inherited from TCastleComponent.PropertySections.

Section where to show property in the editor.

Properties

Public property Anchor: TVector3 read FAnchor write SetAnchor;

Position of the hinge in the parent transformation coordinates.

Public property Axis: TVector3 read FAxis write SetAxis;

Rotation axis around which the Connected rotates. By default +Y.

Published property AngleLimits: Boolean read FAngleLimits write SetAngleLimits default false;

Turns on minimum and maximum rotation angle limit.

Published property MinAngle: Single read FMinAngle write SetMinAngle default 0.0;

Minimal angle, in radians, must be a value between -2pi + epsilon to 0. Honored only if AngleLimits.

Published property MaxAngle: Single read FMaxAngle write SetMaxAngle default 0.0;

Maximum angle, in radians, must be a value between 0 to 2pi - epsilon. Honored only if AngleLimits.

Published property AnchorPersistent: TCastleVector3Persistent read FAnchorPersistent ;

Anchor that can be visually edited in Castle Game Engine Editor, Lazarus and Delphi. Normal user code does not need to deal with this, instead read or write Anchor directly.

See also
Anchor
Position of the hinge in the parent transformation coordinates.
Published property AxisPersistent: TCastleVector3Persistent read FAxisPersistent ;

Axis that can be visually edited in Castle Game Engine Editor, Lazarus and Delphi. Normal user code does not need to deal with this, instead read or write Axis directly.

See also
Axis
Rotation axis around which the Connected rotates.

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