stl loader using j3d package

STLA Files
ASCII stereolithography files

STLA is a data directory which contains examples of "ASCII STL" files. "STL" stands for "stereolithography", and indicates that the primary purpose of this file format is to describe the shape of a 3D stationary object. Stereolithography is a means of creating physical 3D models of such objects, using resin or carefully cut and joined pieces of paper.


ref : http://people.sc.fsu.edu/~jburkardt/data/stla/stla.html

Class GeometryInfo

he GeometryInfo object holds data for processing by the Java3D geometry utility tools.

The NormalGenerator adds normals to geometry without normals.The Stripifier combines adjacent triangles into triangle strips for more efficent rendering.

example:

GeometryInfo gi = new GeometryInfo(GeometryInfo.POLYGON_ARRAY); // initialize the geometry info here // generate normals NormalGenerator ng = new NormalGenerator(); ng.generateNormals(gi); // stripify Stripifier st = new Stripifier(); st.stripify(gi); GeometryArray result = gi.getGeometryArray();

Class Shape3D

The Shape3D leaf node specifies all geometric objects. It contains a list of one or more Geometry component objects and a single Appearance component object. The geometry objects define the shape node's geometric data. The appearance object specifies that object's appearance attributes, including color, material, texture, and so on.
The list of geometry objects must all be of the same equivalence class, that is, the same basic type of primitive. For subclasses of GeometryArray, all point objects are equivalent, all line objects are equivalent, and all polygon objects are equivalent. For other subclasses of Geometry, only objects of the same subclass are equivalent. The equivalence classes are as follows:

• GeometryArray (point): [Indexed]PointArray
• GeometryArray (line): [Indexed]{LineArray, LineStripArray}
• GeometryArray (polygon): [Indexed]{TriangleArray, TriangleStripArray, TriangleFanArray, QuadArray}
• CompressedGeometry
• Raster
• Text3D