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-/*
-* Portions Copyright (C) 2003-2006 Sun Microsystems, Inc.
-* All rights reserved.
-*/
-
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** NOTE: The Original Code (as defined below) has been licensed to Sun
-** Microsystems, Inc. ("Sun") under the SGI Free Software License B
-** (Version 1.1), shown above ("SGI License"). Pursuant to Section
-** 3.2(3) of the SGI License, Sun is distributing the Covered Code to
-** you under an alternative license ("Alternative License"). This
-** Alternative License includes all of the provisions of the SGI License
-** except that Section 2.2 and 11 are omitted. Any differences between
-** the Alternative License and the SGI License are offered solely by Sun
-** and not by SGI.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-**
-** Author: Eric Veach, July 1994
-** Java Port: Pepijn Van Eeckhoudt, July 2003
-** Java Port: Nathan Parker Burg, August 2003
-*/
-package javax.media.opengl.glu;
-
-/**
- * <b>GLUtessellatorCallback</b> interface provides methods that the user will
- * override to define the callbacks for a tessellation object.
- *
- * @author Eric Veach, July 1994
- * @author Java Port: Pepijn Van Eeckhoudt, July 2003
- * @author Java Port: Nathan Parker Burg, August 2003
- */
-public interface GLUtessellatorCallback {
- /**
- * The <b>begin</b> callback method is invoked like
- * {@link javax.media.opengl.GL#glBegin glBegin} to indicate the start of a
- * (triangle) primitive. The method takes a single argument of type int. If
- * the <b>GLU_TESS_BOUNDARY_ONLY</b> property is set to <b>GL_FALSE</b>, then
- * the argument is set to either <b>GL_TRIANGLE_FAN</b>,
- * <b>GL_TRIANGLE_STRIP</b>, or <b>GL_TRIANGLES</b>. If the
- * <b>GLU_TESS_BOUNDARY_ONLY</b> property is set to <b>GL_TRUE</b>, then the
- * argument will be set to <b>GL_LINE_LOOP</b>.
- *
- * @param type
- * Specifics the type of begin/end pair being defined. The following
- * values are valid: <b>GL_TRIANGLE_FAN</b>, <b>GL_TRIANGLE_STRIP</b>,
- * <b>GL_TRIANGLES</b> or <b>GL_LINE_LOOP</b>.
- *
- * @see GLU#gluTessCallback gluTessCallback
- * @see #end end
- * @see #begin begin
- */
- public void begin(int type);
-
- /**
- * The same as the {@link #begin begin} callback method except that
- * it takes an additional reference argument. This reference is
- * identical to the opaque reference provided when {@link
- * GLU#gluTessBeginPolygon gluTessBeginPolygon} was called.
- *
- * @param type
- * Specifics the type of begin/end pair being defined. The following
- * values are valid: <b>GL_TRIANGLE_FAN</b>, <b>GL_TRIANGLE_STRIP</b>,
- * <b>GL_TRIANGLES</b> or <b>GL_LINE_LOOP</b>.
- * @param polygonData
- * Specifics a reference to user-defined data.
- *
- * @see GLU#gluTessCallback gluTessCallback
- * @see #endData endData
- * @see #begin begin
- */
- public void beginData(int type, Object polygonData);
-
-
- /**
- * The <b>edgeFlag</b> callback method is similar to
- * {@link javax.media.opengl.GL#glEdgeFlag glEdgeFlag}. The method takes
- * a single boolean boundaryEdge that indicates which edges lie on the
- * polygon boundary. If the boundaryEdge is <b>GL_TRUE</b>, then each vertex
- * that follows begins an edge that lies on the polygon boundary, that is,
- * an edge that separates an interior region from an exterior one. If the
- * boundaryEdge is <b>GL_FALSE</b>, then each vertex that follows begins an
- * edge that lies in the polygon interior. The edge flag callback (if
- * defined) is invoked before the first vertex callback.<P>
- *
- * Since triangle fans and triangle strips do not support edge flags, the
- * begin callback is not called with <b>GL_TRIANGLE_FAN</b> or
- * <b>GL_TRIANGLE_STRIP</b> if a non-null edge flag callback is provided.
- * (If the callback is initialized to null, there is no impact on
- * performance). Instead, the fans and strips are converted to independent
- * triangles.
- *
- * @param boundaryEdge
- * Specifics which edges lie on the polygon boundary.
- *
- * @see GLU#gluTessCallback gluTessCallback
- * @see #edgeFlagData edgeFlagData
- */
- public void edgeFlag(boolean boundaryEdge);
-
-
- /**
- * The same as the {@link #edgeFlag edgeFlage} callback method
- * except that it takes an additional reference argument. This
- * reference is identical to the opaque reference provided when
- * {@link GLU#gluTessBeginPolygon gluTessBeginPolygon} was called.
- *
- * @param boundaryEdge
- * Specifics which edges lie on the polygon boundary.
- * @param polygonData
- * Specifics a reference to user-defined data.
- *
- * @see GLU#gluTessCallback gluTessCallback
- * @see #edgeFlag edgeFlag
- */
- public void edgeFlagData(boolean boundaryEdge, Object polygonData);
-
-
- /**
- * The <b>vertex</b> callback method is invoked between the {@link
- * #begin begin} and {@link #end end} callback methods. It is
- * similar to {@link javax.media.opengl.GL#glVertex3f glVertex3f},
- * and it defines the vertices of the triangles created by the
- * tessellation process. The method takes a reference as its only
- * argument. This reference is identical to the opaque reference
- * provided by the user when the vertex was described (see {@link
- * GLU#gluTessVertex gluTessVertex}).
- *
- * @param vertexData
- * Specifics a reference to the vertices of the triangles created
- * byt the tessellatin process.
- *
- * @see GLU#gluTessCallback gluTessCallback
- * @see #vertexData vertexData
- */
- public void vertex(Object vertexData);
-
-
- /**
- * The same as the {@link #vertex vertex} callback method except
- * that it takes an additional reference argument. This reference is
- * identical to the opaque reference provided when {@link
- * GLU#gluTessBeginPolygon gluTessBeginPolygon} was called.
- *
- * @param vertexData
- * Specifics a reference to the vertices of the triangles created
- * byt the tessellatin process.
- * @param polygonData
- * Specifics a reference to user-defined data.
- *
- * @see GLU#gluTessCallback gluTessCallback
- * @see #vertex vertex
- */
- public void vertexData(Object vertexData, Object polygonData);
-
-
- /**
- * The end callback serves the same purpose as
- * {@link javax.media.opengl.GL#glEnd glEnd}. It indicates the end of a
- * primitive and it takes no arguments.
- *
- * @see GLU#gluTessCallback gluTessCallback
- * @see #begin begin
- * @see #endData endData
- */
- public void end();
-
-
- /**
- * The same as the {@link #end end} callback method except that it
- * takes an additional reference argument. This reference is
- * identical to the opaque reference provided when {@link
- * GLU#gluTessBeginPolygon gluTessBeginPolygon} was called.
- *
- * @param polygonData
- * Specifics a reference to user-defined data.
- *
- * @see GLU#gluTessCallback gluTessCallback
- * @see #beginData beginData
- * @see #end end
- */
- public void endData(Object polygonData);
-
-
- /**
- * The <b>combine</b> callback method is called to create a new vertex when
- * the tessellation detects an intersection, or wishes to merge features. The
- * method takes four arguments: an array of three elements each of type
- * double, an array of four references, an array of four elements each of
- * type float, and a reference to a reference.<P>
- *
- * The vertex is defined as a linear combination of up to four existing
- * vertices, stored in <i>data</i>. The coefficients of the linear combination
- * are given by <i>weight</i>; these weights always add up to 1. All vertex
- * pointers are valid even when some of the weights are 0. <i>coords</i> gives
- * the location of the new vertex.<P>
- *
- * The user must allocate another vertex, interpolate parameters using
- * <i>data</i> and <i>weight</i>, and return the new vertex pointer in
- * <i>outData</i>. This handle is supplied during rendering callbacks. The
- * user is responsible for freeing the memory some time after
- * {@link GLU#gluTessEndPolygon gluTessEndPolygon} is
- * called.<P>
- *
- * For example, if the polygon lies in an arbitrary plane in 3-space, and a
- * color is associated with each vertex, the <b>GLU_TESS_COMBINE</b>
- * callback might look like this:
- * </UL>
- * <PRE>
- * void myCombine(double[] coords, Object[] data,
- * float[] weight, Object[] outData)
- * {
- * MyVertex newVertex = new MyVertex();
- *
- * newVertex.x = coords[0];
- * newVertex.y = coords[1];
- * newVertex.z = coords[2];
- * newVertex.r = weight[0]*data[0].r +
- * weight[1]*data[1].r +
- * weight[2]*data[2].r +
- * weight[3]*data[3].r;
- * newVertex.g = weight[0]*data[0].g +
- * weight[1]*data[1].g +
- * weight[2]*data[2].g +
- * weight[3]*data[3].g;
- * newVertex.b = weight[0]*data[0].b +
- * weight[1]*data[1].b +
- * weight[2]*data[2].b +
- * weight[3]*data[3].b;
- * newVertex.a = weight[0]*data[0].a +
- * weight[1]*data[1].a +
- * weight[2]*data[2].a +
- * weight[3]*data[3].a;
- * outData = newVertex;
- * }</PRE>
- *
- * @param coords
- * Specifics the location of the new vertex.
- * @param data
- * Specifics the vertices used to create the new vertex.
- * @param weight
- * Specifics the weights used to create the new vertex.
- * @param outData
- * Reference user the put the coodinates of the new vertex.
- *
- * @see GLU#gluTessCallback gluTessCallback
- * @see #combineData combineData
- */
- public void combine(double[] coords, Object[] data,
- float[] weight, Object[] outData);
-
-
- /**
- * The same as the {@link #combine combine} callback method except
- * that it takes an additional reference argument. This reference is
- * identical to the opaque reference provided when {@link
- * GLU#gluTessBeginPolygon gluTessBeginPolygon} was called.
- *
- * @param coords
- * Specifics the location of the new vertex.
- * @param data
- * Specifics the vertices used to create the new vertex.
- * @param weight
- * Specifics the weights used to create the new vertex.
- * @param outData
- * Reference user the put the coodinates of the new vertex.
- * @param polygonData
- * Specifics a reference to user-defined data.
- *
- * @see GLU#gluTessCallback gluTessCallback
- * @see #combine combine
- */
- public void combineData(double[] coords, Object[] data,
- float[] weight, Object[] outData,
- Object polygonData);
-
-
- /**
- * The <b>error</b> callback method is called when an error is encountered.
- * The one argument is of type int; it indicates the specific error that
- * occurred and will be set to one of <b>GLU_TESS_MISSING_BEGIN_POLYGON</b>,
- * <b>GLU_TESS_MISSING_END_POLYGON</b>, <b>GLU_TESS_MISSING_BEGIN_CONTOUR</b>,
- * <b>GLU_TESS_MISSING_END_CONTOUR</b>, <b>GLU_TESS_COORD_TOO_LARGE</b>,
- * <b>GLU_TESS_NEED_COMBINE_CALLBACK</b> or <b>GLU_OUT_OF_MEMORY</b>.
- * Character strings describing these errors can be retrieved with the
- * {@link GLU#gluErrorString gluErrorString} call.<P>
- *
- * The GLU library will recover from the first four errors by inserting the
- * missing call(s). <b>GLU_TESS_COORD_TOO_LARGE</b> indicates that some
- * vertex coordinate exceeded the predefined constant
- * <b>GLU_TESS_MAX_COORD</b> in absolute value, and that the value has been
- * clamped. (Coordinate values must be small enough so that two can be
- * multiplied together without overflow.)
- * <b>GLU_TESS_NEED_COMBINE_CALLBACK</b> indicates that the tessellation
- * detected an intersection between two edges in the input data, and the
- * <b>GLU_TESS_COMBINE</b> or <b>GLU_TESS_COMBINE_DATA</b> callback was not
- * provided. No output is generated. <b>GLU_OUT_OF_MEMORY</b> indicates that
- * there is not enough memory so no output is generated.
- *
- * @param errnum
- * Specifics the error number code.
- *
- * @see GLU#gluTessCallback gluTessCallback
- * @see #errorData errorData
- */
- public void error(int errnum);
-
-
- /**
- * The same as the {@link #error error} callback method except that
- * it takes an additional reference argument. This reference is
- * identical to the opaque reference provided when {@link
- * GLU#gluTessBeginPolygon gluTessBeginPolygon} was called.
- *
- * @param errnum
- * Specifics the error number code.
- * @param polygonData
- * Specifics a reference to user-defined data.
- *
- * @see GLU#gluTessCallback gluTessCallback
- * @see #error error
- */
- public void errorData(int errnum, Object polygonData);
-
- //void mesh(com.sun.opengl.impl.tessellator.GLUmesh mesh);
-}