Examples of javax.media.j3d.GeometryArray

javax.media.j3d.GeometryArray
The GeometryArray object contains separate arrays of positional coordinates, colors, normals, texture coordinates, and vertex attributes that describe point, line, or polygon geometry. This class is extended to create the various primitive types (such as lines, triangle strips, etc.). Vertex data may be passed to this geometry array in one of two ways: by copying the data into the array using the existing methods, or by passing a reference to the data.
- By Copying: The existing methods for setting positional coordinates, colors, normals, texture coordinates, and vertex attributes (such as setCoordinate, setColors, etc.) copy the data into this GeometryArray. This is appropriate for many applications and offers an application much flexibility in organizing its data. This is the default mode.
- By Reference: A new set of methods in Java 3D version 1.2 allows data to be accessed by reference, directly from the user's arrays. To use this feature, set the BY_REFERENCE bit in the vertexFormat field of the constructor for this GeometryArray. In this mode, the various set methods for coordinates, normals, colors, texture coordinates, and vertex attributes are not used. Instead, new methods are used to set a reference to user-supplied coordinate, color, normal, texture coordinate, and vertex attribute arrays (such as setCoordRefFloat, setColorRefFloat, etc.). Data in any array that is referenced by a live or compiled GeometryArray object may only be modified via the updateData method (subject to the ALLOW_REF_DATA_WRITE capability bit). Applications must exercise care not to violate this rule. If any referenced geometry data is modified outside of the updateData method, the results are undefined.
All colors used in the geometry array object must be in the range [0.0,1.0]. Values outside this range will cause undefined results. All normals used in the geometry array object must be unit length vectors. That is their geometric length must be 1.0. Normals that are not unit length vectors will cause undefined results.
Note that the term coordinate, as used in the method names and method descriptions, actually refers to a set of x, y, and z coordinates representing the position of a single vertex. The term coordinates (plural) is used to indicate sets of x, y, and z coordinates for multiple vertices. This is somewhat at odds with the mathematical definition of a coordinate, but is used as a convenient shorthand. Similarly, the term texture coordinate is used to indicate a set of texture coordinates for a single vertex, while the term texture coordinates (plural) is used to indicate sets of texture coordinates for multiple vertices.

        
        int texCoordSetMap[] = new int[1];
        texCoordSetMap[0]=0;
        int sc[]=new int [1];
        sc[0]=data.size();
        GeometryArray ga=new TriangleStripArray(data.size(),
                GeometryArray.COORDINATES | 
                GeometryArray.NORMALS, 
                1, texCoordSetMap,sc);
        data.fill(ga);

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        gi.setStripCounts(sc);
        NormalGenerator ng = new NormalGenerator();
        ng.generateNormals(gi);
        Stripifier st = new Stripifier();
        st.stripify(gi);
        GeometryArray result = gi.getGeometryArray();
        return result;
    }

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  private String [] exportNodeGeometry(Geometry geometry, 
                                       Transform3D parentTransformations, 
                                       TexCoordGeneration texCoordGeneration, 
                                       String objectNameBase) {
    if (geometry instanceof GeometryArray) {
      GeometryArray geometryArray = (GeometryArray)geometry;
      
      // Create vertices indices array depending on geometry class
      int [] verticesIndices = null;
      int [] stripVertexCount = null;
      if (geometryArray instanceof IndexedGeometryArray) {
        if (geometryArray instanceof IndexedLineArray) {
          verticesIndices = new int [((IndexedGeometryArray)geometryArray).getIndexCount()];
        } else if (geometryArray instanceof IndexedTriangleArray) {
          verticesIndices = new int [((IndexedGeometryArray)geometryArray).getIndexCount()];
        } else if (geometryArray instanceof IndexedQuadArray) {
          verticesIndices = new int [((IndexedQuadArray)geometryArray).getIndexCount() * 3 / 2];
        } else if (geometryArray instanceof IndexedGeometryStripArray) {
          IndexedTriangleStripArray geometryStripArray = (IndexedTriangleStripArray)geometryArray;
          stripVertexCount = new int [geometryStripArray.getNumStrips()];
          geometryStripArray.getStripIndexCounts(stripVertexCount);          
          if (geometryArray instanceof IndexedLineStripArray) {
            verticesIndices = new int [getLineCount(stripVertexCount) * 2];
          } else {
            verticesIndices = new int [getTriangleCount(stripVertexCount) * 3];
          } 
        }
      } else {
        if (geometryArray instanceof LineArray) {
          verticesIndices = new int [((GeometryArray)geometryArray).getVertexCount()];
        } else if (geometryArray instanceof TriangleArray) {
          verticesIndices = new int [((GeometryArray)geometryArray).getVertexCount()];
        } else if (geometryArray instanceof QuadArray) {
          verticesIndices = new int [((QuadArray)geometryArray).getVertexCount() * 3 / 2];
        } else if (geometryArray instanceof GeometryStripArray) {
          GeometryStripArray geometryStripArray = (GeometryStripArray)geometryArray;
          stripVertexCount = new int [geometryStripArray.getNumStrips()];
          geometryStripArray.getStripVertexCounts(stripVertexCount);
          if (geometryArray instanceof LineStripArray) {
            verticesIndices = new int [getLineCount(stripVertexCount) * 2];
          } else {
            verticesIndices = new int [getTriangleCount(stripVertexCount) * 3];
          }       
        }
      }


      if (verticesIndices != null) {
        boolean line = geometryArray instanceof IndexedLineArray
            || geometryArray instanceof IndexedLineStripArray
            || geometryArray instanceof LineArray
            || geometryArray instanceof LineStripArray;
        float [] vertices = new float [geometryArray.getVertexCount() * 3];
        float [] normals = !line && (geometryArray.getVertexFormat() & GeometryArray.NORMALS) != 0
            ? new float [geometryArray.getVertexCount() * 3]
            : null;        
        // Store temporarily exported triangles to avoid to add their opposite triangles 
        // (SunFlow doesn't render correctly a face and its opposite)  
        Set<Triangle> exportedTriangles = line
            ? null
            : new HashSet<Triangle>(geometryArray.getVertexCount());
        
        boolean uvsGenerated = false;
        Vector4f planeS = null;
        Vector4f planeT = null;
        if (!line && texCoordGeneration != null) {
          uvsGenerated = texCoordGeneration.getGenMode() == TexCoordGeneration.OBJECT_LINEAR
              && texCoordGeneration.getEnable();
          if (uvsGenerated) {
            planeS = new Vector4f();
            planeT = new Vector4f();
            texCoordGeneration.getPlaneS(planeS);
            texCoordGeneration.getPlaneT(planeT);
          }
        } 
  
        float [] uvs;
        if (uvsGenerated
            || (geometryArray.getVertexFormat() & GeometryArray.TEXTURE_COORDINATE_2) != 0) {
          uvs = new float [geometryArray.getVertexCount() * 2];
        } else {
          uvs = null;
        }
       
        if ((geometryArray.getVertexFormat() & GeometryArray.BY_REFERENCE) != 0) {
          if ((geometryArray.getVertexFormat() & GeometryArray.INTERLEAVED) != 0) {
            float [] vertexData = geometryArray.getInterleavedVertices();
            int vertexSize = vertexData.length / geometryArray.getVertexCount();
            // Export vertices coordinates 
            for (int index = 0, i = vertexSize - 3, n = geometryArray.getVertexCount(); 
                 index < n; index++, i += vertexSize) {
              Point3f vertex = new Point3f(vertexData [i], vertexData [i + 1], vertexData [i + 2]);
              exportVertex(parentTransformations, vertex, index, vertices);
            }
            // Export normals
            if (normals != null) {
              for (int index = 0, i = vertexSize - 6, n = geometryArray.getVertexCount(); 
                   index < n; index++, i += vertexSize) {
                Vector3f normal = new Vector3f(vertexData [i], vertexData [i + 1], vertexData [i + 2]);
                exportNormal(parentTransformations, normal, index, normals);
              }
            }
            // Export texture coordinates
            if (texCoordGeneration != null) {
              if (uvsGenerated) {
                for (int index = 0, i = vertexSize - 3, n = geometryArray.getVertexCount(); 
                      index < n; index++, i += vertexSize) {
                  TexCoord2f textureCoordinates = generateTextureCoordinates(
                      vertexData [i], vertexData [i + 1], vertexData [i + 2], planeS, planeT);
                  exportTextureCoordinates(textureCoordinates, index, uvs);
                }
              }
            } else if (uvs != null) {
              for (int index = 0, i = 0, n = geometryArray.getVertexCount(); 
                    index < n; index++, i += vertexSize) {
                TexCoord2f textureCoordinates = new TexCoord2f(vertexData [i], vertexData [i + 1]);
                exportTextureCoordinates(textureCoordinates, index, uvs);
              }
            }
          } else {
            // Export vertices coordinates
            float [] vertexCoordinates = geometryArray.getCoordRefFloat();
            for (int index = 0, i = 0, n = geometryArray.getVertexCount(); index < n; index++, i += 3) {
              Point3f vertex = new Point3f(vertexCoordinates [i], vertexCoordinates [i + 1], vertexCoordinates [i + 2]);
              exportVertex(parentTransformations, vertex, index, vertices);
            }
            // Export normals
            if (normals != null) {
              float [] normalCoordinates = geometryArray.getNormalRefFloat();
              for (int index = 0, i = 0, n = geometryArray.getVertexCount(); index < n; index++, i += 3) {
                Vector3f normal = new Vector3f(normalCoordinates [i], normalCoordinates [i + 1], normalCoordinates [i + 2]);
                exportNormal(parentTransformations, normal, index, normals);
              }
            }
            // Export texture coordinates
            if (texCoordGeneration != null) {
              if (uvsGenerated) {
                for (int index = 0, i = 0, n = geometryArray.getVertexCount(); index < n; index++, i += 3) {
                  TexCoord2f textureCoordinates = generateTextureCoordinates(
                      vertexCoordinates [i], vertexCoordinates [i + 1], vertexCoordinates [i + 2], planeS, planeT);
                  exportTextureCoordinates(textureCoordinates, index, uvs);
                }
              }
            } else if (uvs != null) {
              float [] textureCoordinatesArray = geometryArray.getTexCoordRefFloat(0);
              for (int index = 0, i = 0, n = geometryArray.getVertexCount(); index < n; index++, i += 2) {
                TexCoord2f textureCoordinates = new TexCoord2f(textureCoordinatesArray [i], textureCoordinatesArray [i + 1]);
                exportTextureCoordinates(textureCoordinates, index, uvs);
              }
            }
          }
        } else {
          // Export vertices coordinates
          for (int index = 0, n = geometryArray.getVertexCount(); index < n; index++) {
            Point3f vertex = new Point3f();
            geometryArray.getCoordinate(index, vertex);
            exportVertex(parentTransformations, vertex, index, vertices);
          }
          // Export normals
          if (normals != null) {
            for (int index = 0, n = geometryArray.getVertexCount(); index < n; index++) {
              Vector3f normal = new Vector3f();
              geometryArray.getNormal(index, normal);
              exportNormal(parentTransformations, normal, index, normals);
            }
          }
          // Export texture coordinates
          if (texCoordGeneration != null) {
            if (uvsGenerated) {
              for (int index = 0, n = geometryArray.getVertexCount(); index < n; index++) {
                Point3f vertex = new Point3f();
                geometryArray.getCoordinate(index, vertex);
                TexCoord2f textureCoordinates = generateTextureCoordinates(
                    vertex.x, vertex.y, vertex.z, planeS, planeT);
                exportTextureCoordinates(textureCoordinates, index, uvs);
              }
            }
          } else if (uvs != null) {
            for (int index = 0, n = geometryArray.getVertexCount(); index < n; index++) {
              TexCoord2f textureCoordinates = new TexCoord2f();
              geometryArray.getTextureCoordinate(0, index, textureCoordinates);
              exportTextureCoordinates(textureCoordinates, index, uvs);
            }
          }
        }

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              System.arraycopy(geometryTextureCoordinateIndices, 0, textureCoordinateIndices, destIndex, geometryTextureCoordinateIndices.length);
              destIndex += geometryTextureCoordinateIndices.length;
            }
          } 


          GeometryArray geometryArray;
          if (firstGeometry instanceof Face) {
            GeometryInfo geometryInfo = new GeometryInfo(GeometryInfo.POLYGON_ARRAY);
            geometryInfo.setCoordinates(vertices);
            geometryInfo.setCoordinateIndices(coordinatesIndices);
            geometryInfo.setStripCounts(stripCounts);
            
            if (firstGeometryHasTextureCoordinateIndices) {
              geometryInfo.setTextureCoordinateParams(1, 2);
              geometryInfo.setTextureCoordinates(0, textureCoodinates);
              geometryInfo.setTextureCoordinateIndices(0, textureCoordinateIndices);
            } 
            
            if (firstFaceHasNormalIndices) {
              int [] normalIndices = new int [indexCount];
              for (int j = 0, destIndex = 0; j < faceCount; j++) {
                int [] faceNormalIndices = ((Face)geometries.get(i + j)).getNormalIndices();
                System.arraycopy(faceNormalIndices, 0, normalIndices, destIndex, faceNormalIndices.length);
                destIndex += faceNormalIndices.length;
              }
              geometryInfo.setNormals(normals);
              geometryInfo.setNormalIndices(normalIndices);
            } else {
              NormalGenerator normalGenerator = new NormalGenerator(Math.PI / 2);
              if (!group.isSmooth()) {
                normalGenerator.setCreaseAngle(0);
              }
              normalGenerator.generateNormals(geometryInfo);
            }
            geometryArray = geometryInfo.getGeometryArray(true, true, false);
          } else { // Line
            int format = IndexedGeometryArray.COORDINATES;
            if (firstGeometryHasTextureCoordinateIndices) {
              format |= IndexedGeometryArray.TEXTURE_COORDINATE_2;
            }
            
            // Use non indexed line array to avoid referencing the whole vertices
            geometryArray = new LineStripArray(coordinatesIndices.length, format, stripCounts);            
            for (int j = 0; j < coordinatesIndices.length; j++) {
              geometryArray.setCoordinate(j, vertices [coordinatesIndices [j]]);
            }
            if (firstGeometryHasTextureCoordinateIndices) {
              for (int j = 0; j < coordinatesIndices.length; j++) {
                geometryArray.setTextureCoordinate(0, j, textureCoodinates [textureCoordinateIndices [j]]);
              }
            }
          }
          
          // Clone appearance to avoid sharing it

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                                 Transform3D parentTransformations, 
                                 TexCoordGeneration texCoordGeneration, 
                                 int cullFace, 
                                 boolean backFaceNormalFlip) throws IOException {
    if (geometry instanceof GeometryArray) {
      GeometryArray geometryArray = (GeometryArray)geometry;      
      
      int [] vertexIndexSubstitutes = new int [geometryArray.getVertexCount()];
      
      boolean normalsDefined = (geometryArray.getVertexFormat() & GeometryArray.NORMALS) != 0;
      Map<Vector3f, Integer> previousNormalIndices = null;
      StringBuilder normalsBuffer;
      if (normalsDefined) {
        normalsBuffer = new StringBuilder(geometryArray.getVertexCount() * 3 * 10);
        previousNormalIndices = new HashMap<Vector3f, Integer>(this.normalIndices);
      } else {
        normalsBuffer = null;
      }
      int [] normalIndexSubstitutes = new int [geometryArray.getVertexCount()];
      int [] oppositeSideNormalIndexSubstitutes;
      if (cullFace == PolygonAttributes.CULL_NONE) {
        oppositeSideNormalIndexSubstitutes = new int [geometryArray.getVertexCount()];
      } else {
        oppositeSideNormalIndexSubstitutes = null;
      }


      boolean textureCoordinatesDefined = (geometryArray.getVertexFormat() & GeometryArray.TEXTURE_COORDINATE_2) != 0;
      int [] textureCoordinatesIndexSubstitutes = new int [geometryArray.getVertexCount()];


      boolean textureCoordinatesGenerated = false;
      Vector4f planeS = null;
      Vector4f planeT = null;
      if (texCoordGeneration != null) {
        textureCoordinatesGenerated = texCoordGeneration.getGenMode() == TexCoordGeneration.OBJECT_LINEAR
            && texCoordGeneration.getEnable()
            && !(geometryArray instanceof IndexedLineArray)
            && !(geometryArray instanceof IndexedLineStripArray)
            && !(geometryArray instanceof LineArray)
            && !(geometryArray instanceof LineStripArray);
        if (textureCoordinatesGenerated) {
          planeS = new Vector4f();
          planeT = new Vector4f();
          texCoordGeneration.getPlaneS(planeS);
          texCoordGeneration.getPlaneT(planeT);
        }
      }
      
      checkCurrentThreadIsntInterrupted();


      if ((geometryArray.getVertexFormat() & GeometryArray.BY_REFERENCE) != 0) {
        if ((geometryArray.getVertexFormat() & GeometryArray.INTERLEAVED) != 0) {
          float [] vertexData = geometryArray.getInterleavedVertices();
          int vertexSize = vertexData.length / geometryArray.getVertexCount();
          // Write vertices coordinates 
          for (int index = 0, i = vertexSize - 3, n = geometryArray.getVertexCount(); 
               index < n; index++, i += vertexSize) {
            Point3f vertex = new Point3f(vertexData [i], vertexData [i + 1], vertexData [i + 2]);
            writeVertex(parentTransformations, vertex, index, vertexIndexSubstitutes);
          }
          // Write texture coordinates
          if (texCoordGeneration != null) {
            if (textureCoordinatesGenerated) {
              for (int index = 0, i = vertexSize - 3, n = geometryArray.getVertexCount(); 
                    index < n; index++, i += vertexSize) {
                TexCoord2f textureCoordinates = generateTextureCoordinates(
                    vertexData [i], vertexData [i + 1], vertexData [i + 2], planeS, planeT);
                writeTextureCoordinates(textureCoordinates, index, textureCoordinatesIndexSubstitutes);
              }
            }
          } else if (textureCoordinatesDefined) {
            for (int index = 0, i = 0, n = geometryArray.getVertexCount(); 
                  index < n; index++, i += vertexSize) {
              TexCoord2f textureCoordinates = new TexCoord2f(vertexData [i], vertexData [i + 1]);
              writeTextureCoordinates(textureCoordinates, index, textureCoordinatesIndexSubstitutes);
            }
          }
          // Write normals
          if (normalsDefined) {
            for (int index = 0, i = vertexSize - 6, n = geometryArray.getVertexCount(); 
                 normalsDefined && index < n; index++, i += vertexSize) {
              Vector3f normal = new Vector3f(vertexData [i], vertexData [i + 1], vertexData [i + 2]);
              normalsDefined = writeNormal(normalsBuffer, parentTransformations, normal, index, 
                  normalIndexSubstitutes, oppositeSideNormalIndexSubstitutes, cullFace, backFaceNormalFlip);
            }
          }
        } else {
          // Write vertices coordinates
          float [] vertexCoordinates = geometryArray.getCoordRefFloat();
          for (int index = 0, i = 0, n = geometryArray.getVertexCount(); index < n; index++, i += 3) {
            Point3f vertex = new Point3f(vertexCoordinates [i], vertexCoordinates [i + 1], vertexCoordinates [i + 2]);
            writeVertex(parentTransformations, vertex, index,
                vertexIndexSubstitutes);
          }
          // Write texture coordinates
          if (texCoordGeneration != null) {
            if (textureCoordinatesGenerated) {
              for (int index = 0, i = 0, n = geometryArray.getVertexCount(); index < n; index++, i += 3) {
                TexCoord2f textureCoordinates = generateTextureCoordinates(
                    vertexCoordinates [i], vertexCoordinates [i + 1], vertexCoordinates [i + 2], planeS, planeT);
                writeTextureCoordinates(textureCoordinates, index, textureCoordinatesIndexSubstitutes);
              }
            }
          } else if (textureCoordinatesDefined) {
            float [] textureCoordinatesArray = geometryArray.getTexCoordRefFloat(0);
            for (int index = 0, i = 0, n = geometryArray.getVertexCount(); index < n; index++, i += 2) {
              TexCoord2f textureCoordinates = new TexCoord2f(textureCoordinatesArray [i], textureCoordinatesArray [i + 1]);
              writeTextureCoordinates(textureCoordinates, index, textureCoordinatesIndexSubstitutes);
            }
          }
          // Write normals
          if (normalsDefined) {
            float [] normalCoordinates = geometryArray.getNormalRefFloat();
            for (int index = 0, i = 0, n = geometryArray.getVertexCount(); normalsDefined && index < n; index++, i += 3) {
              Vector3f normal = new Vector3f(normalCoordinates [i], normalCoordinates [i + 1], normalCoordinates [i + 2]);
              normalsDefined = writeNormal(normalsBuffer, parentTransformations, normal, index, 
                  normalIndexSubstitutes, oppositeSideNormalIndexSubstitutes, cullFace, backFaceNormalFlip);
            }
          }
        }
      } else {
        // Write vertices coordinates
        for (int index = 0, n = geometryArray.getVertexCount(); index < n; index++) {
          Point3f vertex = new Point3f();
          geometryArray.getCoordinate(index, vertex);
          writeVertex(parentTransformations, vertex, index,
              vertexIndexSubstitutes);
        }
        // Write texture coordinates
        if (texCoordGeneration != null) {
          if (textureCoordinatesGenerated) {
            for (int index = 0, n = geometryArray.getVertexCount(); index < n; index++) {
              Point3f vertex = new Point3f();
              geometryArray.getCoordinate(index, vertex);
              TexCoord2f textureCoordinates = generateTextureCoordinates(
                  vertex.x, vertex.y, vertex.z, planeS, planeT);
              writeTextureCoordinates(textureCoordinates, index, textureCoordinatesIndexSubstitutes);
            }
          }
        } else if (textureCoordinatesDefined) {
          for (int index = 0, n = geometryArray.getVertexCount(); index < n; index++) {
            TexCoord2f textureCoordinates = new TexCoord2f();
            geometryArray.getTextureCoordinate(0, index, textureCoordinates);
            writeTextureCoordinates(textureCoordinates, index, textureCoordinatesIndexSubstitutes);
          }
        }
        // Write normals
        if (normalsDefined) {
          for (int index = 0, n = geometryArray.getVertexCount(); normalsDefined && index < n; index++) {
            Vector3f normal = new Vector3f();
            geometryArray.getNormal(index, normal);
            normalsDefined = writeNormal(normalsBuffer, parentTransformations, normal, index, 
                normalIndexSubstitutes, oppositeSideNormalIndexSubstitutes, cullFace, backFaceNormalFlip);
          }
        }
      }

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              || transparencyAttributes.getTransparency() < 1)) {
        // Compute shape geometries area
        for (int i = 0, n = shape.numGeometries(); i < n; i++) {
          Geometry geometry = shape.getGeometry(i);
          if (geometry instanceof GeometryArray) {
            GeometryArray geometryArray = (GeometryArray)geometry;      


            int vertexCount = geometryArray.getVertexCount();
            Point3f vertex = new Point3f();
            if ((geometryArray.getVertexFormat() & GeometryArray.BY_REFERENCE) != 0) {
              if ((geometryArray.getVertexFormat() & GeometryArray.INTERLEAVED) != 0) {
                float [] vertexData = geometryArray.getInterleavedVertices();
                int vertexSize = vertexData.length / vertexCount;
                // Store vertices coordinates 
                for (int index = 0, j = vertexSize - 3; index < vertexCount; j += vertexSize, index++) {
                  vertex.x = vertexData [j];
                  vertex.y = vertexData [j + 1];
                  vertex.z = vertexData [j + 2];
                  parentTransformations.transform(vertex);
                  vertices.add(new float [] {vertex.x, vertex.z});
                }
              } else {
                // Store vertices coordinates
                float [] vertexCoordinates = geometryArray.getCoordRefFloat();
                for (int index = 0, j = 0; index < vertexCount; j += 3, index++) {
                  vertex.x = vertexCoordinates [j];
                  vertex.y = vertexCoordinates [j + 1];
                  vertex.z = vertexCoordinates [j + 2];
                  parentTransformations.transform(vertex);
                  vertices.add(new float [] {vertex.x, vertex.z});
                }
              }
            } else {
              // Store vertices coordinates
              for (int index = 0, j = 0; index < vertexCount; j++, index++) {
                geometryArray.getCoordinate(j, vertex);
                parentTransformations.transform(vertex);
                vertices.add(new float [] {vertex.x, vertex.z});
              }
            }
          }

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   */
  private void computeGeometryAreaOnFloor(Geometry geometry, 
                                          Transform3D parentTransformations, 
                                          Area nodeArea) {
    if (geometry instanceof GeometryArray) {
      GeometryArray geometryArray = (GeometryArray)geometry;      


      int vertexCount = geometryArray.getVertexCount();
      float [] vertices = new float [vertexCount * 2]; 
      Point3f vertex = new Point3f();
      if ((geometryArray.getVertexFormat() & GeometryArray.BY_REFERENCE) != 0) {
        if ((geometryArray.getVertexFormat() & GeometryArray.INTERLEAVED) != 0) {
          float [] vertexData = geometryArray.getInterleavedVertices();
          int vertexSize = vertexData.length / vertexCount;
          // Store vertices coordinates 
          for (int index = 0, i = vertexSize - 3; index < vertices.length; i += vertexSize) {
            vertex.x = vertexData [i];
            vertex.y = vertexData [i + 1];
            vertex.z = vertexData [i + 2];
            parentTransformations.transform(vertex);
            vertices [index++] = vertex.x;
            vertices [index++] = vertex.z;
          }
        } else {
          // Store vertices coordinates
          float [] vertexCoordinates = geometryArray.getCoordRefFloat();
          for (int index = 0, i = 0; index < vertices.length; i += 3) {
            vertex.x = vertexCoordinates [i];
            vertex.y = vertexCoordinates [i + 1];
            vertex.z = vertexCoordinates [i + 2];
            parentTransformations.transform(vertex);
            vertices [index++] = vertex.x;
            vertices [index++] = vertex.z;
          }
        }
      } else {
        // Store vertices coordinates
        for (int index = 0, i = 0; index < vertices.length; i++) {
          geometryArray.getCoordinate(i, vertex);
          parentTransformations.transform(vertex);
          vertices [index++] = vertex.x;
          vertices [index++] = vertex.z;
        }
      }

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    private static final int ALPHA_THRESHOLD = 128;
    private static final double MODEL_SIZE_CORRECTION = 1.5;
    
    public ImageModel(BufferedImage img, boolean scale) {
        super();
        GeometryArray geoms[] = tracePixels(img, scale);
        for (GeometryArray geom : geoms) {
            addGeometry(geom);
        }
        double p = .5;
        if (scale) p *= MODEL_SIZE_CORRECTION;

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//The parameter specifying up to which angle normal vectors should be 
//interpolated, is se here.
    ng.setCreaseAngle(Math.PI);


    ng.generateNormals(gi);
    GeometryArray te = gi.getGeometryArray();


    //Generate the tetrahedron as a Shape.
    Shape3D tetrahedron = new Shape3D(te,yellowApp);


    //The transformation group of the tetrahedron.

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    GeometryInfo gi = new GeometryInfo(GeometryInfo.TRIANGLE_ARRAY);
    gi.setCoordinates(tetrahedronCoordinates);
    gi.setCoordinateIndices(coordIndices);
    NormalGenerator ng = new NormalGenerator();
    ng.generateNormals(gi);
    GeometryArray te = gi.getGeometryArray();


    //Generate the tetrahedron as a Shape.
    Shape3D tetrahedron = new Shape3D(te,yellowApp);


    //The transformation group of the tetrahedron.

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Related Classes of javax.media.j3d.GeometryArray

com.eteks.sweethome3d.j3d.ModelManager

com.eteks.sweethome3d.j3d.OBJLoader

com.eteks.sweethome3d.j3d.OBJWriter

com.eteks.sweethome3d.j3d.PhotoRenderer

com.sun.j3d.loaders.lw3d.J3dLwoParser

com.sun.j3d.utils.compression.CompressionStream

com.sun.j3d.utils.geometry.GeomBuffer

com.sun.j3d.utils.geometry.GeometryInfo

com.sun.j3d.utils.picking.PickIntersection

com.sun.j3d.utils.picking.PickResult

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