ReactOS 0.4.15-dev-8348-gc1b9bb5
trimregion.cc
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1/*
2** License Applicability. Except to the extent portions of this file are
3** made subject to an alternative license as permitted in the SGI Free
4** Software License B, Version 1.1 (the "License"), the contents of this
5** file are subject only to the provisions of the License. You may not use
6** this file except in compliance with the License. You may obtain a copy
7** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
8** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
9**
10** http://oss.sgi.com/projects/FreeB
11**
12** Note that, as provided in the License, the Software is distributed on an
13** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
14** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
15** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
16** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
17**
18** Original Code. The Original Code is: OpenGL Sample Implementation,
19** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
20** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
21** Copyright in any portions created by third parties is as indicated
22** elsewhere herein. All Rights Reserved.
23**
24** Additional Notice Provisions: The application programming interfaces
25** established by SGI in conjunction with the Original Code are The
26** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
27** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
28** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
29** Window System(R) (Version 1.3), released October 19, 1998. This software
30** was created using the OpenGL(R) version 1.2.1 Sample Implementation
31** published by SGI, but has not been independently verified as being
32** compliant with the OpenGL(R) version 1.2.1 Specification.
33*/
34
35/*
36 * trimregion.c++
37 *
38 */
39
40//#include "glimports.h"
41//#include "myassert.h"
42//#include "mystdio.h"
43#include "trimregion.h"
44
46{
47}
48
49void
51{
52 oneOverDu = 1.0/du;
53}
54
55void
56TrimRegion::init( long npts, Arc_ptr extrema )
57{
58 left.init( npts, extrema, extrema->pwlArc->npts - 1 );
59 left.getNextPt();
60
61 right.init( npts, extrema, 0 );
62 right.getPrevPt();
63}
64
65void
67{
68 left.getNextPts( extrema );
69 right.getPrevPts( extrema );
70}
71
72void
74{
75 left.getNextPts( bot.vval, backend );
76 right.getPrevPts( bot.vval, backend );
77}
78
79void
81{
82 getGridExtent( left.last(), right.last() );
83}
84
85void
87{
88 bot.ustart = (long) ((l->param[0] - uarray.uarray[0])*oneOverDu);
89 if( l->param[0] >= uarray.uarray[bot.ustart] ) bot.ustart++;
90// if( l->param[0] > uarray.uarray[bot.ustart] ) bot.ustart++;
91 assert( l->param[0] <= uarray.uarray[bot.ustart] );
92 assert( l->param[0] >= uarray.uarray[bot.ustart-1] );
93
94 bot.uend = (long) ((r->param[0] - uarray.uarray[0])*oneOverDu);
95 if( uarray.uarray[bot.uend] >= r->param[0] ) bot.uend--;
96// if( uarray.uarray[bot.uend] > r->param[0] ) bot.uend--;
97 assert( r->param[0] >= uarray.uarray[bot.uend] );
98 assert( r->param[0] <= uarray.uarray[bot.uend+1] );
99}
100
101int
103{
104 TrimVertex *lf = left.first();
105 TrimVertex *ll = left.last();
106 TrimVertex *l = ( ll->param[0] > lf->param[0] ) ? ll : lf;
107
108 TrimVertex *rf = right.first();
109 TrimVertex *rl = right.last();
110 TrimVertex *r = ( rl->param[0] < rf->param[0] ) ? rl : rf;
111 return (l->param[0] <= r->param[0]) ? 1 : 0;
112}
113
w ll
Definition: byte_order.h:167
r l[0]
Definition: byte_order.h:168
int canTile(void)
Definition: trimregion.cc:102
void getGridExtent(void)
Definition: trimregion.cc:80
Gridline bot
Definition: trimregion.h:56
Uarray uarray
Definition: trimregion.h:57
void init(REAL)
Definition: trimregion.h:73
REAL oneOverDu
Definition: trimregion.h:69
void setDu(REAL)
Definition: trimregion.cc:50
void getPts(Arc_ptr)
Definition: trimregion.cc:66
REAL param[2]
Definition: trimvertex.h:45
REAL * uarray
Definition: uarray.h:52
class Arc * Arc_ptr
Definition: arc.h:50
float REAL
Definition: types.h:41
#define assert(x)
Definition: debug.h:53
GLdouble GLdouble GLdouble r
Definition: gl.h:2055
GLdouble GLdouble right
Definition: glext.h:10859
GLint left
Definition: glext.h:7726
#define long
Definition: qsort.c:33
REAL vval
Definition: gridline.h:41
long uend
Definition: gridline.h:44
long ustart
Definition: gridline.h:43