I am trying to refactor my J3D code to semi-match the Xith3D api.
I am trying to use the IndexedQuadArray node, but whenever I need to set my indicies ( setCoordinateIndices(0,indicies) in J3D), I have no equivalent in Xith3D…
Is there an alternate way of doing this?
Thanks
Zak Nixon
???
Use setIndex(int[] i) to set all of the indices.
Thanks for your reply, ewillis.
Is there also a way to set the color indicies as well?
So far, I can use a PointArray for my points and my geometry shows up (also QuadArray), but with the IndexedQuadArray, I am not seeing anything.
I have used the setIndex(int[] indicies) for the coordinates, and set my Shape3D’s coloring attributes.
Anyone have examples of working with the IndexedQuadArray?
Thanks :-/
Zak Nixon
I have tried adding a quad using the IndexedQuadArray and a triangle using the IndexedTriangleArray. The quad does not display, but the triangle will. Below is my code.
The quad:
public Shape3D getGrid(){
int numIndexes = 4;
int[] indexes = new int[]{0,1,2,3};
// Vector3f[] normals = new Vector3f[]{ new Vector3f(0.0f,0.0f,1.0f),new Vector3f(0.0f,0.0f,1.0f),new Vector3f(0.0f,0.0f,1.0f),new Vector3f(0.0f,0.0f,1.0f)};
IndexedQuadArray a = new IndexedQuadArray(4,IndexedTriangleArray.COORDINATES,numIndexes);
Point3f[] coords = new Point3f[]{ new Point3f(1.0f,1.0f,0.0f), new Point3f(-1.0f,1.0f,0.0f),new Point3f(-1.0f,-1.0f,0.0f),new Point3f(1.0f,-1.0f,0.0f)};
a.setValidIndexCount(4);
a.setCoordinates(0,coords);
//a.setNormals(0,normals);
a.setIndex(indexes);
Appearance app = new Appearance();
Material material = new Material();
material.setAmbientColor(.6f,.6f,.6f);
material.setLightingEnable(true);
app.setColoringAttributes(new ColoringAttributes(new Color3f(1.0f,0.0f,0.0f),ColoringAttributes.FASTEST));
app.setPolygonAttributes(new PolygonAttributes(PolygonAttributes.POLYGON_LINE,PolygonAttributes.CULL_NONE,0f));
// app.setMaterial(material);
Shape3D s = new Shape3D(a,app);
return s;
}
The triangle:
public Shape3D getTriangle(){
int numIndexes = 3;
int[] indexes = new int[]{0,1,2};
// Vector3f[] normals = new Vector3f[]{ new Vector3f(0.0f,0.0f,1.0f),new Vector3f(0.0f,0.0f,1.0f),new Vector3f(0.0f,0.0f,1.0f),new Vector3f(0.0f,0.0f,1.0f)};
IndexedTriangleArray a = new IndexedTriangleArray(3,IndexedTriangleArray.COORDINATES,numIndexes);
Point3f[] coords = new Point3f[]{ new Point3f(1.0f,1.0f,0.0f), new Point3f(-1.0f,1.0f,0.0f),new Point3f(-1.0f,-1.0f,0.0f)};
a.setValidIndexCount(3);
a.setCoordinates(0,coords);
//a.setNormals(0,normals);
a.setIndex(indexes);
Appearance app = new Appearance();
Material material = new Material();
material.setAmbientColor(.6f,.6f,.6f);
material.setLightingEnable(true);
app.setColoringAttributes(new ColoringAttributes(new Color3f(1.0f,0.0f,0.0f),ColoringAttributes.FASTEST));
app.setPolygonAttributes(new PolygonAttributes(PolygonAttributes.POLYGON_LINE,PolygonAttributes.CULL_NONE,0f));
// app.setMaterial(material);
Shape3D s = new Shape3D(a,app);
return s;
}
Any thing I am doing wrong?
Thanks
Zak
I suggest using com.xith3d.utility.geometry.XithGeometryInfo and com.xith3d.utility.geometry.GeometryCreator. GeometryCreator lets you specify geometries in an OpenGL manner, XithGeometryInfo allows you to create various GeometryArraysS from a GeometryCreator.
Well, unfourtunately, these classes do not support Quad geometry, just Triangle Strips.
There has to be a way to build simple quad geometry…
Any suggestions?
Zak
You can always represent a quad as two triangles. Is there a reason you really need to use a QuadArray?
I am trying to draw a wireframe model of a sphere, like lat/lon lines. I already have the geometry defined as Indexed Quads. I could define them as individual lines, but that changes all of my algorithms and data structs.
Just trying to find a one-to-one correspondance between J3D and Xith.
Zak
i guess there is no problem in ur code…the problem is with the one of the library class of Xith…go to the PACKAGE–com.xith3d.render.jogl…CLASS----ShapeAtomPeer…in this class go to the METHOD—private void drawGeometry(CanvasPeer canvas, GL gl, GeometryArray geoArray)… in this method actually some code is missing… i have made changes in this code…now the working code should be…
private void drawGeometry(CanvasPeer canvas, GL gl, GeometryArray geoArray) {
ProfileTimer.startProfile("drawGeometry");
int numVertices = geoArray.getValidVertexCount();
//
if (numVertices == 0) {
if (CanvasPeerImpl.debugGL) Log.print(LogType.DEBUG, "Skipping because there are no valid vertices ");
ProfileTimer.endProfile();
return;
}
// get the format of verticies
int format = geoArray.getVertexFormat();
int stripCount = 0;
int[] stripVertexCounts = null;
// if a strip array then get the above two values
if (geoArray instanceof GeometryStripArray) {
stripCount = ((GeometryStripArray) geoArray).getNumStrips();
stripVertexCounts = ((GeometryStripArray) geoArray).
getStripVertexCounts();
if (CanvasPeerImpl.debugGL) Log.print(LogType.DEBUG, "Drawing a strip array " + stripCount + " strips");
}
// find out if color3f data was supplied and if it was use it
int mode = 0;
if ((geoArray instanceof IndexedGeometryArray)) {
canvas.addTriangles( ((IndexedGeometryArray)geoArray).getValidIndexCount()/geoArray.getFaceSize());
} else if (geoArray instanceof TriangleArray) {
if (CanvasPeerImpl.debugGL) Log.print(LogType.DEBUG, "Drawing a triangle array with " + numVertices + " vertices");
mode = GL.GL_TRIANGLES; // say that we want to draw trianlges
canvas.addTriangles(numVertices/geoArray.getFaceSize());
} else if (geoArray instanceof QuadArray) {
if (CanvasPeerImpl.debugGL) Log.print(LogType.DEBUG, "Drawing a quad array with " + numVertices + " vertices");
mode = GL.GL_QUADS; // say that we want to draw quads
canvas.addTriangles(numVertices/geoArray.getFaceSize());
} else if (geoArray instanceof PointArray) {
mode = GL.GL_POINTS; // say that we want to draw points
canvas.addTriangles(numVertices/geoArray.getFaceSize());
} else if (geoArray instanceof LineArray) {
mode = GL.GL_LINES; // say that we want to draw lines
} else if (!(geoArray instanceof GeometryStripArray)) {
if (CanvasPeerImpl.debugGL) Log.print(LogType.DEBUG, "Skipping unknown geometry : " + geoArray.getClass().getName());
ProfileTimer.endProfile();
return; // don't know how to draw this
}
// do the actual drawing genericly
setupBuffers(canvas, gl, geoArray);
if (geoArray instanceof GeometryStripArray) {
//setPointers(gl);
if (CanvasPeerImpl.debugGL) Log.print(LogType.DEBUG, "Starting drawing strips for GeometryStripArray");
// loop through the strips
if (geoArray instanceof LineStripArray) {
mode = GL.GL_LINE_STRIP; // say that we want to draw a line strip
} else if (geoArray instanceof TriangleStripArray) {
mode = GL.GL_TRIANGLE_STRIP; // say that we want to draw a triangle strip
// if (CanvasPeerImpl.debugGL) Log.print(LogType.DEBUG,“Drawing a triangle strip “+strip+” of “+stripCount+” strips and “+stripVertexCounts[strip]+” vertices”);
} else if (geoArray instanceof TriangleFanArray) {
mode = GL.GL_TRIANGLE_FAN; // say that we want to draw a triangle fan
}
int start = 0;
for (int strip = 0; strip < stripCount; strip++) {
gl.glDrawArrays(mode, start, stripVertexCounts[strip]);
start += stripVertexCounts[strip];
}
} else if (geoArray instanceof IndexedGeometryArray) {
if (geoArray instanceof IndexedLineArray) {
mode = GL.GL_LINES; // say that we want to draw points
IndexedGeometryArray igeoArray = (IndexedGeometryArray) geoArray;
gl.glDrawElements(mode, igeoArray.getValidIndexCount(), GL.GL_UNSIGNED_INT, igeoArray.getIndexData().getIntBuffer());
}
if (geoArray instanceof IndexedQuadArray) {
mode = GL.GL_QUADS; // say that we want to draw points
IndexedGeometryArray igeoArray = (IndexedGeometryArray) geoArray;
gl.glDrawElements(mode, igeoArray.getValidIndexCount(), GL.GL_UNSIGNED_INT, igeoArray.getIndexData().getIntBuffer());
}
if (geoArray instanceof IndexedTriangleArray) {
mode = GL.GL_TRIANGLES; // say that we want to draw points
IndexedGeometryArray igeoArray = (IndexedGeometryArray) geoArray;
gl.glDrawElements(mode, igeoArray.getValidIndexCount(), GL.GL_UNSIGNED_INT, igeoArray.getIndexData().getIntBuffer());
} else if ( geoArray instanceof IndexedGeometryStripArray ) {
if ( geoArray instanceof IndexedTriangleStripArray ) {
mode = GL.GL_TRIANGLE_STRIP;
IndexedGeometryStripArray igsa = (IndexedGeometryStripArray)geoArray;
int[] strips = igsa.getStripVertexCounts();
int start = 0;
for (int s = 0; s < strips.length; s++) {
gl.glDrawElements(mode,strips[s],GL.GL_UNSIGNED_INT,((IntBuffer)igsa.getIndexData().getIntBuffer().position(start)).slice());
start += strips[s];
}
}
if ( geoArray instanceof IndexedLineStripArray ) {
mode = GL.GL_LINE_STRIP;
IndexedGeometryStripArray igsa = (IndexedGeometryStripArray)geoArray;
int[] strips = igsa.getStripVertexCounts();
int start = 0;
for (int s = 0; s < strips.length; s++) {
gl.glDrawElements(mode,strips[s],GL.GL_UNSIGNED_INT,((IntBuffer)igsa.getIndexData().getIntBuffer().position(start)).slice());
start += strips[s];
}
}
if ( geoArray instanceof IndexedTriangleFanArray ) {
mode = GL.GL_TRIANGLE_FAN;
IndexedGeometryStripArray igsa = (IndexedGeometryStripArray)geoArray;
int[] strips = igsa.getStripVertexCounts();
int start = 0;
for (int s = 0; s < strips.length; s++) {
gl.glDrawElements(mode,strips[s],GL.GL_UNSIGNED_INT,((IntBuffer)igsa.getIndexData().getIntBuffer().position(start)).slice());
start += strips[s];
}
}
}
} else {
gl.glDrawArrays(mode, geoArray.getInitialVertexIndex(), geoArray.getValidVertexCount());
}
ProfileTimer.endProfile();
}
i guess replacing the previous code with this one,will solve ur problem…try this…All the best… n plzzz let me know if it works…