org.jmol.jvxl.api

Interface MeshDataServer

public interface MeshDataServer extends VertexDataServer

Method Summary
abstract voidaddTriangleCheck(int iA, int iB, int iC, int check, boolean isAbsolute)
addTriangleCheck adds a triangle along with a 3-bit check indicating which edges to draw in mesh mode: 1 (iA-iB) + 2 (iB-iC) + 4 (iC-iA)
abstract intaddVertexCopy(Point3f vertexXYZ, float value, int assocVertex)
addVertexCopy is used by the Marching Squares algorithm to uniquely identify a new vertex when an edge is crossed in the 2D plane.
abstract Point3f[]calculateGeodesicSurface(BitSet bsSelected, float envelopeRadius)
abstract voidfillMeshData(MeshData meshData, int mode)
abstract intgetSurfacePointIndex(float cutoff, boolean isCutoffAbsolute, int x, int y, int z, Point3i offset, int vertexA, int vertexB, float valueA, float valueB, Point3f pointA, Vector3f edgeVector, boolean isContourType)
getSurfacePointIndex is used by the Marching Cubes algorithm and must return a unique integer identifier for a vertex created by the Marching Cube algorithm when it finds an edge.
abstract voidinvalidateTriangles()
abstract voidnotifySurfaceGenerationCompleted()
abstract voidnotifySurfaceMappingCompleted()

Method Detail

addTriangleCheck

public abstract void addTriangleCheck(int iA, int iB, int iC, int check, boolean isAbsolute)
addTriangleCheck adds a triangle along with a 3-bit check indicating which edges to draw in mesh mode: 1 (iA-iB) + 2 (iB-iC) + 4 (iC-iA)

Parameters: iA iB iC check isAbsolute

addVertexCopy

public abstract int addVertexCopy(Point3f vertexXYZ, float value, int assocVertex)
addVertexCopy is used by the Marching Squares algorithm to uniquely identify a new vertex when an edge is crossed in the 2D plane. The implementing method should COPY the Point3f using Point3f.set(). The data consumer can use the association key to group this vertex with others near the same gridpoint.

Parameters: vertexXYZ value assocVertex unique association vertex or -1

Returns: new vertex index

calculateGeodesicSurface

public abstract Point3f[] calculateGeodesicSurface(BitSet bsSelected, float envelopeRadius)

fillMeshData

public abstract void fillMeshData(MeshData meshData, int mode)

getSurfacePointIndex

public abstract int getSurfacePointIndex(float cutoff, boolean isCutoffAbsolute, int x, int y, int z, Point3i offset, int vertexA, int vertexB, float valueA, float valueB, Point3f pointA, Vector3f edgeVector, boolean isContourType)
getSurfacePointIndex is used by the Marching Cubes algorithm and must return a unique integer identifier for a vertex created by the Marching Cube algorithm when it finds an edge. If a vertex is discarded, then Integer.MAX_VALUE should be returned. the 3D coordinate of the point can be calculated using surfacePoint.scaleAdd(fraction, edgeVector, pointA); where fraction is generally calculated as: fraction = (cutoff - valueA) / (valueB - valueA); if (isCutoffAbsolute && (fraction < 0 || fraction > 1)) fraction = (-cutoff - valueA) / (valueB - valueA); This method is also used by MarchingCubes to deliver the appropriate oblique planar coordinate to MarchingSquares for later contouring.

Parameters: cutoff isCutoffAbsolute x y z offset vertexA [0:7] vertexB [0:7] valueA valueB pointA edgeVector vector from A to B isContourType

Returns: new vertex index or Integer.MAX_VALUE

invalidateTriangles

public abstract void invalidateTriangles()

notifySurfaceGenerationCompleted

public abstract void notifySurfaceGenerationCompleted()

notifySurfaceMappingCompleted

public abstract void notifySurfaceMappingCompleted()