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 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
