mirror of
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117 lines
3.6 KiB
C++
117 lines
3.6 KiB
C++
/*
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** License Applicability. Except to the extent portions of this file are
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** made subject to an alternative license as permitted in the SGI Free
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** Software License B, Version 1.1 (the "License"), the contents of this
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** file are subject only to the provisions of the License. You may not use
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** this file except in compliance with the License. You may obtain a copy
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** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
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** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
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**
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** http://oss.sgi.com/projects/FreeB
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**
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** Note that, as provided in the License, the Software is distributed on an
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** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
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** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
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** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
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** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
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**
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** Original Code. The Original Code is: OpenGL Sample Implementation,
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** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
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** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
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** Copyright in any portions created by third parties is as indicated
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** elsewhere herein. All Rights Reserved.
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**
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** Additional Notice Provisions: The application programming interfaces
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** established by SGI in conjunction with the Original Code are The
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** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
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** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
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** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
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** Window System(R) (Version 1.3), released October 19, 1998. This software
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** was created using the OpenGL(R) version 1.2.1 Sample Implementation
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** published by SGI, but has not been independently verified as being
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** compliant with the OpenGL(R) version 1.2.1 Specification.
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**
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** $Date$ $Revision: 1.1 $
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*/
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/*
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** $Header: /cygdrive/c/RCVS/CVS/ReactOS/reactos/lib/glu32/libnurbs/nurbtess/primitiveStream.h,v 1.1 2004/02/02 16:39:13 navaraf Exp $
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*/
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/*we do not use the constans GL_... so that this file is independent of
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*<GL/gl.h>
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*/
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#ifndef _PRIMITIVE_STREAM_H
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#define _PRIMITIVE_STREAM_H
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enum {PRIMITIVE_STREAM_FAN, PRIMITIVE_STREAM_STRIP};
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#include "definitions.h"
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class primStream {
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Int *lengths; /*length[i]=number of vertices of ith primitive*/
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Int *types; /*each primive has a type: FAN or STREAM*/
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Real *vertices; /*the size >= 2 * num_vertices, each vertex (u,v)*/
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/*the following size information are used for dynamic arrays*/
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Int index_lengths; /*the current available entry*/
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Int size_lengths; /*the allocated size of the array: lengths*/
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Int index_vertices;
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Int size_vertices;
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/*the vertex is inserted one by one. counter is used to
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*count the number of vertices which have been inserted so far in
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*the current primitive
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*/
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Int counter;
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public:
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primStream(Int sizeLengths, Int sizeVertices);
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~primStream();
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Int get_n_prims() //num of primitives
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{
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return index_lengths;
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}
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Int get_type(Int i) //the type of ith primitive
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{
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return types[i];
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}
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Int get_length(Int i) //the length of the ith primitive
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{
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return lengths[i];
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}
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Real* get_vertices() {return vertices;}
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/*the begining of inserting a new primitive.
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*reset counter to be 0.
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*/
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void begin();
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void insert(Real u, Real v);
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void insert(Real v[2]) {insert(v[0], v[1]);}
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void end(Int type);
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Int num_triangles();
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void triangle(Real A[2], Real B[2], Real C[2])
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{
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begin();
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insert(A);
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insert(B);
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insert(C);
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end(PRIMITIVE_STREAM_FAN);
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}
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void print();
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void draw(); /*using GL to draw the primitives*/
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};
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#endif
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