ReactOS  0.4.14-dev-358-gbef841c
curvesub.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  * curvesub.c++
37  *
38  */
39 
40 #include "glimports.h"
41 #include "myassert.h"
42 #include "mystdio.h"
43 #include "subdivider.h"
44 #include "renderhints.h"
45 #include "backend.h"
46 #include "quilt.h"
47 #include "curvelist.h"
48 //#include "nurbsconsts.h"
49 
50 /*--------------------------------------------------------------------------
51  * drawCurves - main curve rendering entry point
52  *--------------------------------------------------------------------------
53  */
54 
55 void
57 {
58  REAL from[1], to[1];
59  Flist bpts;
60  qlist->getRange( from, to, bpts );
61 
62  renderhints.init( );
63 
64  backend.bgncurv();
65  for( int i=bpts.start; i<bpts.end-1; i++ ) {
66  REAL pta, ptb;
67  pta = bpts.pts[i];
68  ptb = bpts.pts[i+1];
69 
70  qlist->downloadAll( &pta, &ptb, backend );
71 
72  Curvelist curvelist( qlist, pta, ptb );
74  }
75  backend.endcurv();
76 }
77 
78 
79 /*--------------------------------------------------------------------------
80  * samplingSplit - recursively subdivide patch, cull check each subpatch
81  *--------------------------------------------------------------------------
82  */
83 
84 void
85 Subdivider::samplingSplit( Curvelist& curvelist, int subdivisions )
86 {
87  if( curvelist.cullCheck() == CULL_TRIVIAL_REJECT ) return;
88 
89  curvelist.getstepsize();
90 
91  if( curvelist.needsSamplingSubdivision() && (subdivisions > 0) ) {
92  REAL mid = ( curvelist.range[0] + curvelist.range[1] ) * 0.5;
93  Curvelist lowerlist( curvelist, mid );
94  samplingSplit( lowerlist, subdivisions-1 ); // lower
95  samplingSplit( curvelist, subdivisions-1 ); // upper
96  } else {
97  long nu = 1 + ((long) (curvelist.range[2] / curvelist.stepsize));
98  backend.curvgrid( curvelist.range[0], curvelist.range[1], nu );
99  backend.curvmesh( 0, nu );
100  }
101 }
102 
Backend & backend
Definition: subdivider.h:121
void drawCurves(void)
Definition: curvesub.cc:56
void bgncurv(void)
Definition: backend.cc:529
Definition: flist.h:42
REAL * pts
Definition: flist.h:44
void init(void)
Definition: renderhints.cc:63
void samplingSplit(Curvelist &, int)
Definition: curvesub.cc:85
GLsizei GLenum const GLvoid GLsizei GLenum GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLint GLint GLint GLshort GLshort GLshort GLubyte GLubyte GLubyte GLuint GLuint GLuint GLushort GLushort GLushort GLbyte GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLfloat GLint GLint GLint GLint GLshort GLshort GLshort GLshort GLubyte GLubyte GLubyte GLubyte GLuint GLuint GLuint GLuint GLushort GLushort GLushort GLushort GLboolean const GLdouble const GLfloat const GLint const GLshort const GLbyte const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLdouble const GLfloat const GLfloat const GLint const GLint const GLshort const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort GLenum GLenum GLenum GLfloat GLenum GLint GLenum GLenum GLenum GLfloat GLenum GLenum GLint GLenum GLfloat GLenum GLint GLint GLushort GLenum GLenum GLfloat GLenum GLenum GLint GLfloat const GLubyte GLenum GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLint GLint GLsizei GLsizei GLint GLenum GLenum const GLvoid GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLenum const GLdouble GLenum GLenum const GLfloat GLenum GLenum const GLint GLsizei GLuint GLfloat GLuint GLbitfield GLfloat GLint GLuint GLboolean GLenum GLfloat GLenum GLbitfield GLenum GLfloat GLfloat GLint GLint const GLfloat GLenum GLfloat GLfloat GLint GLint GLfloat GLfloat GLint GLint const GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat const GLdouble const GLfloat const GLdouble const GLfloat GLint i
Definition: glfuncs.h:248
void endcurv(void)
Definition: backend.cc:585
int maxsubdivisions
Definition: renderhints.h:55
void getstepsize(void)
Definition: curvelist.cc:94
void curvgrid(REAL, REAL, long)
Definition: backend.cc:555
int cullCheck(void)
Definition: curvelist.cc:85
int needsSamplingSubdivision()
Definition: curvelist.cc:108
void curvmesh(long, long)
Definition: backend.cc:561
#define long
Definition: qsort.c:33
void getRange(REAL *, REAL *, Flist &, Flist &)
Definition: quilt.cc:186
float stepsize
Definition: curvelist.h:60
Renderhints & renderhints
Definition: subdivider.h:120
void downloadAll(REAL *, REAL *, Backend &)
Definition: quilt.cc:157
int start
Definition: flist.h:46
float REAL
Definition: types.h:41
CardRegion * from
Definition: spigame.cpp:19
int end
Definition: flist.h:47
float range[3]
Definition: curvelist.h:58
Quilt * qlist
Definition: subdivider.h:127
#define CULL_TRIVIAL_REJECT
Definition: defines.h:40