I have the same problem with QuadArray, although I did not get the
"POLYGON_ARRAY" exception.
I posted the following message, but haven't gotten an answer:
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I've built a QuadArray with per-vertex colors, however I can't figure out
how to get it to do shading.
The Quad array is a colection of boxes (the primitive Box() wasn't working
for the application) each box is made a different color by setting the
vertex colors.
I've applied an appearance object to the QuadArray, but what I get is a
single material layed over the box color.
Is there any way to set up the material so it goes to the geometry and picks
the ambient color from the surface which I can then scale and apply to
diffuse and specular colors?
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-----Original Message-----
From: Desiree Hilbring [mailto:[EMAIL PROTECTED]]
Sent: Monday, September 27, 1999 9:34 AM
To: [EMAIL PROTECTED]
Subject: [JAVA3D] Shading
Hi Everybody!
First I created Geometry with QuadArray, which worked fine, but now I want
to shade it, and tried to use GeometryInfo with the NormalGenerator,
I did set
ginfo[l] = new GeometryInfo(GeometryInfo.QUAD_ARRAY);
ginfo[l].recomputeIndices();
ginfo[l].setStripCounts(strip[l]);
norm.setCreaseAngle(0); (I want to see my edges)
In running my application I'll get:
GeometryInfo must have primitve type POLYGON_ARRAY
when I use POLYGON_ARRAY I'll get my shape3d but without shading!
Any ideas?
Thanks for any help!
Desiree
Here is a part of my sourcecode:
float[] x, y;
QuadArray[] quad;
int[][] strip;
GeometryInfo[] ginfo;
// Quad stores geometry of side
// I have got several objects to create in the same way
quad = new QuadArray[sp.getNrOfBoundaries()];
// Coordseite stores coordinates in the way quad needs them
coordseite = new Point3f[sp.getNrOfBoundaries()][];
strip = new int[sp.getNrOfBoundaries()][];
ginfo = new GeometryInfo[sp.getNrOfBoundaries()];
shape = new Shape3D[sp.getNrOfBoundaries()];
for(int l=0;l<sp.getNrOfBoundaries();l++) {
quad[l]=new
QuadArray(baseArea.getCoordinates()[l].length*4*2,QuadArray.COORDINATES);
coordseite[l] = new
Point3f[(baseArea.getCoordinates()[l].length)*4*2];
Vector3f[(baseArea.getCoordinates()[l].length)*4*2];
strip[l] = new int[baseArea.getCoordinates()[l].length*2];
for(int m=0;m<baseArea.getCoordinates()[l].length*2;m++)
strip[l][m]=4;
float k=0;
for(inti=0;i<=((baseArea.getCoordinates()[l].length)*4*2)-1;i=i+4) {
k=k+0.5f;
if (((int)k)>=baseArea.getCoordinates()[l].length) {
k=baseArea.getCoordinates()[l].length-2;
}
if ((((int)k)+1)>=baseArea.getCoordinates()[l].length) {
k=baseArea.getCoordinates()[l].length-2;
}
if((i)<=coordseite[l].length-1) {
coordseite[l][i]= new
Point3f(baseAreaunten.getCoordinates()[l][(int)k]);
}
if((i+1)<=coordseite[l].length-1) {
coordseite[l][i+1]= new
Point3f(baseAreaunten.getCoordinates()[l][((int)k)+1]);
}
if((i+2)<=coordseite[l].length-1) {
coordseite[l][i+2]= new
Point3f(baseArea.getCoordinates()[l][((int)k)+1]);
}
if((i+3)<=coordseite[l].length-1) {
coordseite[l][i+3]= new
Point3f(baseArea.getCoordinates()[l][(int)k]);
}
}
quad[l].setCoordinates(0,coordseite[l]);
// GeometryInfo
ginfo[l] = new GeometryInfo(GeometryInfo.POLYGON_ARRAY);
// exception with
//ginfo[l] = new GeometryInfo(GeometryInfo.QUAD_ARRAY);
ginfo[l].setCoordinates(coordseite[l]);
ginfo[l].setStripCounts(strip[l]);
ginfo[l].recomputeIndices();
// Triangulator devides the polygon in triangles
Triangulator tr = new Triangulator();
tr.triangulate(ginfo[l]);
NormalGenerator norm = new NormalGenerator();
norm.generateNormals(ginfo[l]);
norm.setCreaseAngle(0);
Stripifier st = new Stripifier();
st.stripify(ginfo[l]);
// Set Appearance
// Colors are from 2D objects
GraphicsContext gc = sp.getGraphicsContext();
Color c = gc.getForegroundColor();
float red = (float)c.getRed()/255f;
float green = (float)c.getGreen()/255f;
float blue = (float)c.getBlue()/255f;
Color3f fc = new Color3f(red,green,blue);
Appearance app = new Appearance();
//LIGHT
Material material = new Material(fc,black,black,black,20f);
material.setCapability(Material.ALLOW_COMPONENT_READ);
material.setCapability(Material.ALLOW_COMPONENT_WRITE);
app.setMaterial(material);
app.setCapability(Appearance.ALLOW_MATERIAL_WRITE);
app.setCapability(Appearance.ALLOW_MATERIAL_READ);
app.setCapability(Appearance.ALLOW_COLORING_ATTRIBUTES_READ);
app.setCapability(Appearance.ALLOW_COLORING_ATTRIBUTES_WRITE);
PolygonAttributes polyattr = new PolygonAttributes();
polyattr.setCullFace(PolygonAttributes.CULL_NONE);
ColoringAttributes colatt = new
ColoringAttributes(fc,ColoringAttributes.SHADE_GOURAUD);
colatt.setCapability(ColoringAttributes.ALLOW_COLOR_READ);
colatt.setCapability(ColoringAttributes.ALLOW_COLOR_WRITE);
app.setColoringAttributes(colatt);
app.setPolygonAttributes(polyattr);
// Create Shape3D
shape[l] = new Shape3D();
shape[l].setCapability(Shape3D.ALLOW_APPEARANCE_READ);
shape[l].setCapability(Shape3D.ALLOW_APPEARANCE_WRITE);
shape[l].setAppearance(app);
shape[l].setGeometry(ginfo[l].getGeometryArray());
}
}
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