ReactOS 0.4.15-dev-7924-g5949c20
reader.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 * reader.c++
37 *
38 */
39
40//#include <stdio.h>
41//#include "glimports.h"
42#include "nurbsconsts.h"
43#include "reader.h"
44#include "trimvertex.h"
45#include "simplemath.h"
46
47//when read a pwlCurve, if two consecutive points are the same, then
48//eliminate one of them. This makes the tessellator more robust. The spec
49//assumes the application makes sure there are no redundant points.
50//but in Inspector, the trim curves seem to have redundant points a lot.
51//I guess other similar users may have the same problem.
52
53#define ELIMINATE_REDUNDANT_POINTS
54
55#ifdef ELIMINATE_REDUNDANT_POINTS
56#define equal(x,y) ( glu_abs(x-y) <= 0.00001)
57#endif
58
59#ifdef ELIMINATE_REDUNDANT_POINTS
60O_pwlcurve::O_pwlcurve( long _type, long count, INREAL *array, long byte_stride, TrimVertex *trimpts )
61{
62 next = 0;
63 used = 0;
64 owner = 0;
65 pts = trimpts;
66 npts = (int) count;
67 save = 0;
68 int i;
69
70 /* copy user data into internal trimming data structures */
71 switch( _type ) {
72 case N_P2D: {
73 TrimVertex *v = pts;
74 TrimVertex *prev = NULL;
75 int num = 0;
76 int doit;
77 for(i=0; i<count; i++) {
78 doit = 1;
79 if(prev != NULL)
80 {
81 if(equal(prev->param[0], array[0]) && equal(prev->param[1], array[1]))
82 {
83 doit = 0;
84 }
85 }
86
87 if(doit)
88 {
89 v->param[0] = (REAL) array[0];
90 v->param[1] = (REAL) array[1];
91 prev = v;
92 v++;
93 num++;
94 }
95 array = (INREAL *) (((char *) array) + byte_stride);
96 }
97 npts = num;
98 break;
99 }
100 case N_P2DR: {
101 TrimVertex *v = pts;
102 for( TrimVertex *lastv = v + count; v != lastv; v++ ) {
103 v->param[0] = (REAL) array[0] / (REAL) array[2];
104 v->param[1] = (REAL) array[1] / (REAL) array[2];
105 array = (INREAL *) (((char *) array) + byte_stride);
106 }
107 break;
108 }
109 }
110}
111#else
112O_pwlcurve::O_pwlcurve( long _type, long count, INREAL *array, long byte_stride, TrimVertex *trimpts )
113{
114 next = 0;
115 used = 0;
116 owner = 0;
117 pts = trimpts;
118 npts = (int) count;
119 save = 0;
120
121 /* copy user data into internal trimming data structures */
122 switch( _type ) {
123 case N_P2D: {
124 TrimVertex *v = pts;
125 for( TrimVertex *lastv = v + count; v != lastv; v++ ) {
126 v->param[0] = (REAL) array[0];
127 v->param[1] = (REAL) array[1];
128 array = (INREAL *) (((char *) array) + byte_stride);
129 }
130 break;
131 }
132 case N_P2DR: {
133 TrimVertex *v = pts;
134 for( TrimVertex *lastv = v + count; v != lastv; v++ ) {
135 v->param[0] = (REAL) array[0] / (REAL) array[2];
136 v->param[1] = (REAL) array[1] / (REAL) array[2];
137 array = (INREAL *) (((char *) array) + byte_stride);
138 }
139 break;
140 }
141 }
142}
143#endif
144
145
146
147
148
int used
Definition: reader.h:88
O_curve * owner
Definition: reader.h:90
int save
Definition: reader.h:89
O_pwlcurve(long, long, INREAL *, long, TrimVertex *)
Definition: reader.cc:60
int npts
Definition: reader.h:86
TrimVertex * pts
Definition: reader.h:85
O_pwlcurve * next
Definition: reader.h:87
REAL param[2]
Definition: trimvertex.h:45
#define NULL
Definition: types.h:112
#define INREAL
Definition: types.h:40
float REAL
Definition: types.h:41
unsigned int(__cdecl typeof(jpeg_read_scanlines))(struct jpeg_decompress_struct *
Definition: typeof.h:31
#define doit(a, b)
Definition: fieldoff.c:4
const GLdouble * v
Definition: gl.h:2040
GLuint GLuint GLsizei count
Definition: gl.h:1545
GLuint GLuint num
Definition: glext.h:9618
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
#define N_P2D
Definition: nurbsconsts.h:116
#define N_P2DR
Definition: nurbsconsts.h:117
#define equal(x, y)
Definition: reader.cc:56