ReactOS  0.4.10-dev-479-g13a3cf0
sampledLine.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 */
37 
38 #include <stdlib.h>
39 #include <stdio.h>
40 #include <math.h> //for fabs()
41 //#include "glimports.h"
42 #include "zlassert.h"
43 #include "sampledLine.h"
44 
46 {
47  points[i][0]=p[0];
48  points[i][1]=p[1];
49 }
50 
51 
52 /*insert this single line in front of the oldList*/
54 {
55  next = oldList;
56  return this;
57 }
58 
60 {
61  sampledLine *temp, *tempNext;
62  for(temp = this; temp != NULL; temp = tempNext)
63  {
64  tempNext = temp->next;
65  delete temp;
66  }
67 }
68 
69 
70 /*space of points[][2] is allocated*/
72 {
73  npoints = n_points;
74  points = (Real2*) malloc(sizeof(Real2) * n_points);
75  assert(points);
76  next = NULL;
77 }
78 
79 /*space of points[][2] is allocated and
80  *points are copied
81  */
82 sampledLine::sampledLine(Int n_points, Real2 pts[])
83 {
84  int i;
85  npoints = n_points;
86  points = (Real2*) malloc(sizeof(Real2) * n_points);
87  assert(points);
88  for(i=0; i<npoints; i++) {
89  points[i][0] = pts[i][0];
90  points[i][1] = pts[i][1];
91  }
92  next = NULL;
93 }
94 
96 {
97  npoints = 2;
98  points = (Real2*) malloc(sizeof(Real2) * 2);
99  assert(points);
100  points[0][0] = pt1[0];
101  points[0][1] = pt1[1];
102  points[1][0] = pt2[0];
103  points[1][1] = pt2[1];
104  next = NULL;
105 }
106 
107 //needs tp call init to setup
109 {
110  npoints = 0;
111  points = NULL;
112  next = NULL;
113 }
114 
115 //warning: ONLY pointer is copies!!!
116 void sampledLine::init(Int n_points, Real2 *pts)
117 {
118  npoints = n_points;
119  points = pts;
120 }
121 
122 /*points[] is dealocated
123  */
125 {
126  free(points);
127 }
128 
130 {
131  int i;
132  printf("npoints=%i\n", npoints);
133 
134  for(i=0; i<npoints; i++){
135  printf("(%f,%f)\n", points[i][0], points[i][1]);
136  }
137 
138 }
139 
140 void sampledLine::tessellate(Real u_reso, Real v_reso)
141 {
142  int i;
143 
144  Int nu, nv, n;
145  nu = 1+(Int) (fabs((points[npoints-1][0] - points[0][0])) * u_reso);
146  nv = 1+(Int) (fabs((points[npoints-1][1] - points[0][1])) * v_reso);
147 
148  if(nu > nv) n = nu;
149  else
150  n = nv;
151  if(n<1)
152  n = 1;
153  //du dv could be negative
154  Real du = (points[npoints-1][0] - points[0][0])/n;
155  Real dv = (points[npoints-1][1] - points[0][1])/n;
156  Real2 *temp = (Real2*) malloc(sizeof(Real2) * (n+1));
157  assert(temp);
158 
159  Real u,v;
160  for(i=0, u=points[0][0], v=points[0][1]; i<n; i++, u+=du, v+=dv)
161  {
162  temp[i][0] = u;
163  temp[i][1] = v;
164  }
165  temp[n][0] = points[npoints-1][0];
166  temp[n][1] = points[npoints-1][1];
167 
168  free(points);
169 
170  npoints = n+1;
171  points = temp;
172 
173 }
174 
176 {
177  sampledLine* temp;
178  for(temp = this; temp != NULL; temp = temp->next)
179  {
180  temp->tessellate(u_reso, v_reso);
181  }
182 }
#define free
Definition: debug_ros.c:5
void init(Int n_points, Real2 *pts)
Definition: sampledLine.cc:116
#define assert(x)
Definition: debug.h:53
GLenum GLclampf GLint GLenum GLuint GLenum GLenum GLsizei GLenum const GLvoid GLfloat GLfloat GLfloat GLfloat GLclampd GLint 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 GLboolean GLboolean GLboolean GLint GLenum GLsizei const GLvoid GLenum GLint GLenum GLint GLint GLsizei GLint GLenum GLint GLint GLint GLint GLsizei GLenum GLsizei const GLuint GLboolean GLenum GLenum GLint GLsizei GLenum GLsizei GLenum const GLvoid GLboolean const GLboolean GLenum const GLdouble * u
Definition: glfuncs.h:88
sampledLine * insert(sampledLine *nline)
Definition: sampledLine.cc:53
GLuint n
Definition: s_context.h:57
GLenum GLclampf GLint i
Definition: glfuncs.h:14
void tessellateAll(Real u_reso, Real v_reso)
Definition: sampledLine.cc:175
smooth NULL
Definition: ftsmooth.c:416
void print()
Definition: sampledLine.cc:129
sampledLine * next
Definition: sampledLine.h:65
GLsizei const GLfloat * points
Definition: glext.h:8112
void tessellate(Real u_reso, Real v_reso)
Definition: sampledLine.cc:140
static stack_node_t temp
Definition: rpn.c:18
_Check_return_ _CRT_JIT_INTRINSIC double __cdecl fabs(_In_ double x)
const GLdouble * v
Definition: gl.h:2040
void setPoint(Int i, Real p[2])
Definition: sampledLine.cc:45
float Real
Definition: definitions.h:36
#define malloc
Definition: debug_ros.c:4
Real Real2[2]
Definition: definitions.h:38
GLfloat GLfloat p
Definition: glext.h:8902
void deleteList()
Definition: sampledLine.cc:59
#define printf
Definition: config.h:203
int Int
Definition: definitions.h:37