ArcClose2D
Overview
ArcClose2D is a polygonal geometry node that defines a linear circular arc, closed by PIE or CHORD line segments, with center (0,0) in X-Y plane, with angles measured starting at positive x-axis and sweeping towards positive y-axis.
The ArcClose2D node belongs to the Geometry2D component and requires at least support level 2, its default container field is geometry. It is available from X3D version 3.0 or higher.
Hierarchy
1
2
3
+ X3DNode
+ X3DGeometryNode
+ ArcClose2D
Fields
SFNode [in, out] metadata NULL [X3DMetadataObject]
Information about this node can be contained in a MetadataBoolean, MetadataDouble, MetadataFloat, MetadataInteger, MetadataString or MetadataSet node.
Hint
SFString [ ] closureType “PIE” [“PIE”|”CHORD”]
Defines whether pair of line segments connect to center (PIE), or single line-segment chord connects arc endpoints (CHORD).
Warning
- Simple-geometry parameters cannot be changed after initial creation.
SFFloat [ ] startAngle 0 [-2π,2π]
Arc extends from startAngle counterclockwise to endAngle, in radians.
Hints
- For size animation, modify the scale of a parent/ancestor Transform node instead.
- Radian units for angular measure
Warning
- Simple-geometry dimensions are initializeOnly and cannot be changed after initial creation, avoiding the need for potentially expensive tessellation at run time.
SFFloat [ ] endAngle π/2 [-2π,2π]
Arc extends from startAngle counterclockwise to endAngle, in radians.
Hints
- For size animation, modify the scale of a parent/ancestor Transform node instead.
- Radian units for angular measure
Warning
- Simple-geometry dimensions are initializeOnly and cannot be changed after initial creation, avoiding the need for potentially expensive tessellation at run time.
SFFloat [ ] radius 1 (0,∞)
Circle radius, of which the arc is a portion.
Hint
- For size animation, modify the scale of a parent/ancestor Transform node instead.
Warning
- Simple-geometry dimensions are initializeOnly and cannot be changed after initial creation, avoiding the need for potentially expensive tessellation at run time.
SFBool [ ] solid FALSE
Setting solid true means draw only one side of polygons (backface culling on), setting solid false means draw both sides of polygons (backface culling off).
Hints
- Mnemonic “this geometry is solid like a brick” (you don’t render the inside of a brick).
- If in doubt, use solid=’false’ for maximum visibility.
- AccessType relaxed to inputOutput in order to support animation and visualization.
Warnings
- Default value true can completely hide geometry if viewed from wrong side!
- solid false not supported in VRML97.
Advice
Hint
- Insert a Shape node before adding geometry or Appearance.
Warning
Example
