VRML 2 Sourcebook X3D Examples Archive, Chapter 13 Points Lines Faces

X3D Example Archives: VRML 2 Sourcebook, Chapter 13 Points Lines Faces

Points, lines and mesh faces allow authors to build a complete variety of geometry.

Complex shapes are hard to build with primitive shapes (for example: terrain, animals, plants, machinery). Instead, build shapes out of atomic components: points, lines, and polygon faces. Shape building is like a 3D connect-the-dots game: place dots at 3D locations, and connect-the-dots to form shapes A coordinate specifies a 3D dot location, measured relative to a coordinate system origin. A geometry node then specifies how to connect the dots: for example, PointSet, IndexedLineSet, or IndexedFaceSet. Animation is accomplished using a CoordinateInterpolator node.

These X3D scenes are adapted directly from the original VRML 2.0 Sourcebook chapter examples. Also available: Introduction to VRML97 SIGGRAPH98 course notes.

9 X3D Models		X3D Model Descriptions
	Figure 13 10 Point Set Box Corners	Points in an IndexedPointSet mark the eight corners of a box. Point size is always 1 pixel regardless of distance.
	Figure 13 11 Indexed Line Set Box Wireframe	A simple wireframe cube drawn with IndexedLineSet.
	Figure 13 12 Indexed Face Set Cube	A simple solid cube drawn with IndexedFaceSet.
	Figure 13 13 Indexed Face Set Lightning Bolt	A 3D lightning bolt using concave faces. Compare Figures 13.13 and 17.7b.
	Figure 13 14 Vaulted Ceiling Piece Creased	A nonsolid vaulted ceiling piece.
	Figure 13 15 Vaulted Ceiling Piece	A smoothly shaded vaulted ceiling piece.
	Figure 13 16 Vaulted Ceiling	A vaulted ceiling piece used repeatedly to build part of a medieval building.
	Figure 13 17a Morphing Cube	A morphing cube shape using IndexedFaceSet and CoordinateInterpolator.
	Figure 13 17b Morphing Cube Line Set	A morphing cube shape using IndexedLineSet and CoordinateInterpolator. Note that constant-width lines thwart perspective rendering and lead to optical-illusion effects.

The X3D Resources: Examples page and Savage Developers Guide provide more information about the production of this archive.