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/*
* SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
* Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice including the dates of first publication and
* either this permission notice or a reference to
* http://oss.sgi.com/projects/FreeB/
* shall be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Except as contained in this notice, the name of Silicon Graphics, Inc.
* shall not be used in advertising or otherwise to promote the sale, use or
* other dealings in this Software without prior written authorization from
* Silicon Graphics, Inc.
*/
/*
*/
/*we do not use the constans GL_... so that this file is independent of
*<GL/gl.h>
*/
#ifndef _PRIMITIVE_STREAM_H
#define _PRIMITIVE_STREAM_H
enum {PRIMITIVE_STREAM_FAN, PRIMITIVE_STREAM_STRIP};
#include "definitions.h"
class primStream {
Int *lengths; /*length[i]=number of vertices of ith primitive*/
Int *types; /*each primive has a type: FAN or STREAM*/
Real *vertices; /*the size >= 2 * num_vertices, each vertex (u,v)*/
/*the following size information are used for dynamic arrays*/
Int index_lengths; /*the current available entry*/
Int size_lengths; /*the allocated size of the array: lengths*/
Int index_vertices;
Int size_vertices;
/*the vertex is inserted one by one. counter is used to
*count the number of vertices which have been inserted so far in
*the current primitive
*/
Int counter;
public:
primStream(Int sizeLengths, Int sizeVertices);
~primStream();
Int get_n_prims() //num of primitives
{
return index_lengths;
}
Int get_type(Int i) //the type of ith primitive
{
return types[i];
}
Int get_length(Int i) //the length of the ith primitive
{
return lengths[i];
}
Real* get_vertices() {return vertices;}
/*the begining of inserting a new primitive.
*reset counter to be 0.
*/
void begin();
void insert(Real u, Real v);
void insert(Real v[2]) {insert(v[0], v[1]);}
void end(Int type);
Int num_triangles();
void triangle(Real A[2], Real B[2], Real C[2])
{
begin();
insert(A);
insert(B);
insert(C);
end(PRIMITIVE_STREAM_FAN);
}
void print();
void draw(); /*using GL to draw the primitives*/
};
#endif
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