Arc2D
Arc2D
Overview
Arc2D is a line-based geometry node that defines a linear circular arc with center (0,0) in X-Y plane, with angles measured starting at positive x-axis and sweeping towards positive y-axis.
The Arc2D 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
+ Arc2D
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
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.
Advice
Hints
- Material emissiveColor in corresponding Appearance is used for rendering lines.
- Adding LineProperties to the corresponding Appearance node can modify the rendering style of these lines.
- Insert a Shape node before adding geometry or Appearance.
Warnings
- Lines are not lit, are not texture-mapped, and do not participate in collision detection.
- Use a different Material emissiveColor than the Background color, otherwise geometry is invisible.
- Requires X3D
profile='Full'or else include<component name='Geometry2D' level='2'/>Examples: X3D Example Archives, X3D for Web Authors, Chapter 10 Geometry 2D
Example
See Also
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