mirror of
https://github.com/reactos/reactos.git
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144 lines
4.7 KiB
C++
144 lines
4.7 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/gridWrap.h,v 1.1 2004/02/02 16:39:13 navaraf Exp $
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*/
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#ifndef _GRIDWRAP_H
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#define _GRIDWRAP_H
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#include <stdio.h>
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#include "definitions.h"
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#include "primitiveStream.h"
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#include "zlassert.h"
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class gridWrap{
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Int n_ulines;
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Int n_vlines;
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Real u_min, u_max;
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Real v_min, v_max;
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/*cache the coordinate values for efficiency.
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*these are redundant information when
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*the grid is uniform.
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*/
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Real* u_values; /*size is n_ulines*/
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Real* v_values; /*size is n_vlines*/
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Int is_uniform;
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public:
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//uniform grid constructor
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gridWrap(Int nUlines, Int nVlines,
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Real uMin, Real uMax,
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Real vMin, Real vMax
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);
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//nonuniform grid constructor.
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gridWrap(Int nUlines, Real *uvals,
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Int nVlines, Real *vvlas
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);
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~gridWrap();
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void print();
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Int get_n_ulines() {return n_ulines;}
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Int get_n_vlines() {return n_vlines;}
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Real get_u_min() {return u_min;}
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Real get_u_max() {return u_max;}
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Real get_v_min() {return v_min;}
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Real get_v_max() {return v_max;}
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Real get_u_value(Int i)
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{
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assert(i<n_ulines);
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/*if(i>=n_ulines){printf("ERROR, n_ulines=%i,i=%i\n",n_ulines,i);exit(0);}*/
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return u_values[i];}
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Real get_v_value(Int j) {return v_values[j];}
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Real* get_u_values() {return u_values;}
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Real* get_v_values() {return v_values;}
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void outputFanWithPoint(Int v, Int uleft, Int uright,
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Real vert[2], primStream* pStream);
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void draw();
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Int isUniform() {return is_uniform;}
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};
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class gridBoundaryChain{
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gridWrap* grid;
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Int firstVlineIndex;
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Int nVlines;
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Int* ulineIndices; /*each v line has a boundary*/
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Int* innerIndices; /*the segment of the vertical gridline from */
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/*(innerIndices[i], i) to (innerIndices[i+1], i-1) */
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/*is inside the polygon: i=1,...,nVlines-1*/
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Real2* vertices; /*one grid point at each grid V-line, cached for efficiency*/
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public:
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gridBoundaryChain(gridWrap* gr, Int first_vline_index, Int n_vlines, Int* uline_indices, Int* inner_indices);
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~gridBoundaryChain()
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{
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free(innerIndices);
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free(ulineIndices);
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free(vertices);
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}
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/*i indexes the vlines in this chain.
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*/
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Int getVlineIndex(Int i) {return firstVlineIndex-i;}
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Int getUlineIndex(Int i) {return ulineIndices[i];}
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Real get_u_value(Int i) {return vertices[i][0];}
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Real get_v_value(Int i) {return vertices[i][1];}
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Int get_nVlines() {return nVlines;}
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Int getInnerIndex(Int i) {return innerIndices[i];}
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Real getInner_u_value(Int i) {return grid->get_u_value(innerIndices[i]);}
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Real* get_vertex(Int i) {return vertices[i];}
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gridWrap* getGrid() {return grid;}
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void leftEndFan(Int i, primStream* pStream);
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void rightEndFan(Int i, primStream* pStream);
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Int lookfor(Real v, Int i1, Int i2); //find i in [i1,i2] so that vertices[i][1]>= v > vertices[i+1][1]
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void draw();
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void drawInner();
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};
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#endif
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