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## com.sun.j3d.utils.pickfast
Class PickIntersection

    java.lang.Object
      com.sun.j3d.utils.pickfast.PickIntersection

    public class PickIntersection

extends java.lang.Object

Holds information about an intersection of a PickShape with a Node as part of a PickInfo.IntersectionInfo. Information about the intersected geometry, intersected primitive, intersection point, and closest vertex can be inquired.

The intersected primitive indicates which primitive out of the GeometryArray was intersected (where the primitive is a point, line, triangle or quad, not a `com.sun.j3d.utils.geometry.Primitive)`. For example, the intersection would indicate which triangle out of a triangle strip was intersected. The methods which return primitive data will have one value if the primitive is a point, two values if the primitive is a line, three values if the primitive is a triangle and four values if the primitive is quad.

The primitive's VWorld coordinates are saved when then intersection is calculated. The local coordinates, normal, color and texture coordinates for the primitive can also be inquired if they are present and readable.

The intersection point is the location on the primitive which intersects the pick shape closest to the center of the pick shape. The intersection point's location in VWorld coordinates is saved when the intersection is calculated. The local coordinates, normal, color and texture coordiantes of at the intersection can be interpolated if they are present and readable.

The closest vertex is the vertex of the primitive closest to the intersection point. The vertex index, VWorld coordinates and local coordinates of the closest vertex can be inquired. The normal, color and texture coordinate of the closest vertex can be inquired from the geometry array:

>           Vector3f getNormal(PickIntersection pi, int vertexIndex) {
>               int index;
>               Vector3d normal = new Vector3f();
>               GeometryArray ga = pickIntersection.getGeometryArray();
>               if (pickIntersection.geometryIsIndexed()) {
>                   index = ga.getNormalIndex(vertexIndex);
>               } else {
>                   index = vertexIndex;
>               }
>               ga.getNormal(index, normal);
>               return normal;
>           }

The color, normal and texture coordinate information for the intersected primitive and the intersection point can be inquired the geometry includes them and the corresponding READ capibility bits are set.

Constructor Summary
`PickIntersection(Transform3D localToVWorld, PickInfo.IntersectionInfo intersectionInfo)` Constructor

Method Summary
`boolean` | `geometryIsIndexed()` Returns true if the geometry is indexed
`Point3d` | `getClosestVertexCoordinates()` Get coordinates of closest vertex (local)
`Point3d` | `getClosestVertexCoordinatesVW()` Get coordinates of closest vertex (world)
`int` | `getClosestVertexIndex()` Get index of closest vertex
`double` | `getDistance()` Get the distance from the PickShape start point to the intersection point
`PickInfo.IntersectionInfo` | `getIntersectionInfo()` Gets the IntersectionInfo this intersection is part of.
`Color4f` | `getPointColor()` Returns the color of the intersection point.
`Point3d` | `getPointCoordinates()` Returns the coordinates of the intersection point (local coordinates), if available.
`Point3d` | `getPointCoordinatesVW()` Returns the coordinates of the intersection point (world coordinates), if available.
`Vector3f` | `getPointNormal()` Returns the normal of the intersection point.
`TexCoord3f` | `getPointTextureCoordinate(int index)` Returns the texture coordinate of the intersection point at the specifed index in the specified texture coordinate set.
`int[]` | `getPrimitiveColorIndices()` Get the color indices for the intersected primitive.
`Color4f[]` | `getPrimitiveColors()` Get the colors of the intersected primitive.
`int[]` | `getPrimitiveCoordinateIndices()` Get the coordinates indices for the intersected primitive.
`Point3d[]` | `getPrimitiveCoordinates()` Get the local coordinates intersected primitive
`Point3d[]` | `getPrimitiveCoordinatesVW()` Get VWorld coordinates of the intersected primitive
`int[]` | `getPrimitiveNormalIndices()` Get the normal indices for the intersected primitive.
`Vector3f[]` | `getPrimitiveNormals()` Get the normals of the intersected primitive.
`int[]` | `getPrimitiveTexCoordIndices(int index)` Get the texture coordinate indices for the intersected primitive at the specifed index in the specified texture coordinate set.
`TexCoord3f[]` | `getPrimitiveTexCoords(int index)` Get the texture coordinates of the intersected primitive at the specifed index in the specified texture coordinate set.
`int[]` | `getPrimitiveVertexIndices()` Get vertex indices of the intersected primitive
`java.lang.String` | `toString()` String representation of this object

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Constructor Detail

### PickIntersection

    public PickIntersection(Transform3D localToVWorld,
                            PickInfo.IntersectionInfo intersectionInfo)

  Constructor

  Parameters:
    `intersectionInfo` - The IntersectionInfo this intersection is part of.

Method Detail

### geometryIsIndexed

    public boolean geometryIsIndexed()

  Returns true if the geometry is indexed

### getClosestVertexCoordinates

    public Point3d getClosestVertexCoordinates()

  Get coordinates of closest vertex (local)

  Returns:
    the coordinates of the vertex closest to the intersection point

### getClosestVertexCoordinatesVW

    public Point3d getClosestVertexCoordinatesVW()

  Get coordinates of closest vertex (world)

  Returns:
    the coordinates of the vertex closest to the intersection point

### getClosestVertexIndex

    public int getClosestVertexIndex()

  Get index of closest vertex

  Returns:
    the index of the closest vertex

### getDistance

    public double getDistance()

  Get the distance from the PickShape start point to the intersection point

  Returns:
    the distance to the intersection point, if available.

### getPointColor

    public Color4f getPointColor()

  Returns the color of the intersection point. Returns null if the geometry does not contain colors. If the geometry was defined with GeometryArray.COLOR_3, the 'w' component of the color will initialized to 1.0

  Returns:
    color at the intersection point.

### getPointCoordinates

    public Point3d getPointCoordinates()

  Returns the coordinates of the intersection point (local coordinates), if available.

  Returns:
    coordinates of the intersection point

### getPointCoordinatesVW

    public Point3d getPointCoordinatesVW()

  Returns the coordinates of the intersection point (world coordinates), if available.

  Returns:
    coordinates of the point

### getPointNormal

    public Vector3f getPointNormal()

  Returns the normal of the intersection point. Returns null if the geometry does not contain normals.

  Returns:
    normal at the intersection point.

### getPointTextureCoordinate

    public TexCoord3f getPointTextureCoordinate(int index)

  Returns the texture coordinate of the intersection point at the specifed index in the specified texture coordinate set. Returns null if the geometry does not contain texture coordinates. If the geometry was defined with GeometryArray.TEXTURE_COORDINATE_3, the 'z' component of the texture coordinate will initialized to 0.0

  Returns:
    texture coordinate at the intersection point.

### getPrimitiveColorIndices

    public int[] getPrimitiveColorIndices()

  Get the color indices for the intersected primitive. For a non-indexed primitive, this will be the same as the primitive vertex indices If the geometry array does not contain colors this will return null.

  Returns:
    an array indices

### getPrimitiveColors

    public Color4f[] getPrimitiveColors()

  Get the colors of the intersected primitive. This will return null if the primitive does not contain colors. If the geometry was defined using GeometryArray.COLOR_3, the 'w' value of the color will be set to 1.0.

  Returns:
    an array of Point3d's for the primitive that was intersected

### getPrimitiveCoordinateIndices

    public int[] getPrimitiveCoordinateIndices()

  Get the coordinates indices for the intersected primitive. For a non-indexed primitive, this will be the same as the primitive vertex indices

  Returns:
    an array indices

### getPrimitiveCoordinates

    public Point3d[] getPrimitiveCoordinates()

  Get the local coordinates intersected primitive

  Returns:
    an array of Point3d's for the primitive that was intersected

### getPrimitiveCoordinatesVW

    public Point3d[] getPrimitiveCoordinatesVW()

  Get VWorld coordinates of the intersected primitive

  Returns:
    an array of Point3d's for the primitive that was picked

### getPrimitiveNormalIndices

    public int[] getPrimitiveNormalIndices()

  Get the normal indices for the intersected primitive. For a non-indexed primitive, this will be the same as the primitive vertex indices If the geometry array does not contain normals this will return null

  Returns:
    an array indices

### getPrimitiveNormals

    public Vector3f[] getPrimitiveNormals()

  Get the normals of the intersected primitive. This will return null if the primitive does not contain normals.

  Returns:
    an array of Point3d's for the primitive that was intersected

### getPrimitiveTexCoordIndices

    public int[] getPrimitiveTexCoordIndices(int index)

  Get the texture coordinate indices for the intersected primitive at the specifed index in the specified texture coordinate set. For a non-indexed primitive, this will be the same as the primitive vertex indices If the geometry array does not contain texture coordinates, this will return null.

  Returns:
    an array indices

### getPrimitiveTexCoords

    public TexCoord3f[] getPrimitiveTexCoords(int index)

  Get the texture coordinates of the intersected primitive at the specifed index in the specified texture coordinate set. null if the primitive does not contain texture coordinates. If the geometry was defined using GeometryArray.TEXTURE_COORDINATE_2, the 'z' value of the texture coordinate will be set to 0.0.

  Returns:
    an array of TexCoord3f's for the primitive that was intersected

### getPrimitiveVertexIndices

    public int[] getPrimitiveVertexIndices()

  Get vertex indices of the intersected primitive

  Returns:
    an array which contains the list of indices

### getIntersectionInfo

    public PickInfo.IntersectionInfo getIntersectionInfo()

  Gets the IntersectionInfo this intersection is part of.

### toString

    public java.lang.String toString()

  String representation of this object

  Overrides:
    `toString` in class `java.lang.Object`

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Copyright 1996-2008 Sun Microsystems, Inc. All Rights Reserved. Use is subject to license terms.