1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
|
//=======================================================================
//@V@:Note: This file generated by vgen V1.04 (09:06:20 22 Jun 1998).
// cubecnv.cpp: Source for cubeOGLCanvasPane class
//=======================================================================
#include "cubecnv.h"
//
// This program based on cube demo from GLUT distribution:
// Copyright (c) Mark J. Kilgard, 1997.
// This program is freely distributable without licensing fees
// and is provided without guarantee or warrantee expressed or
// implied. This program is -not- in the public domain.
// This program was requested by Patrick Earl; hopefully someone else
// will write the equivalent Direct3D immediate mode program.
//###############################################################
// BEW's Note: I've left the code as close to the original as possible,
// including leaving it mostly C-like. This means things aren't
// as hidden as C++ likes. But it was a VERY easy conversion!
//
// This program took about 15 minutes to generate from the original
// demo code - honest! Here's what I did:
// 1) Used VGen to generate a shell V OpenGL app called cube.
// 2) Copied the original GLUT example to this file. Added
// call to init() in graphicsInit(), and a call to display()
// in Redraw. Removed glut call from display. Removed excess
// code from glut cube demo source (main, etc.)
// 3) Changed Test button in cubecmdw.cpp to Exit.
// 4) Changed canvas size to 300 by 300 in cubeapp.cpp.
// THAT'S IT! Ran perfectly first time (well, I actually forgot to
// change the canvas size until after I ran the program once....)
//
// These lines come from the front of the original cube.c, including
// the global functions drawBox and display....
GLfloat light_diffuse[] = {1.0, 0.0, 0.0, 1.0}; /* Red diffuse light. */
GLfloat light_position[] = {1.0, 1.0, 1.0, 0.0}; /* Infinite light location. */
GLfloat n[6][3] = { /* Normals for the 6 faces of a cube. */
{-1.0, 0.0, 0.0}, {0.0, 1.0, 0.0}, {1.0, 0.0, 0.0},
{0.0, -1.0, 0.0}, {0.0, 0.0, 1.0}, {0.0, 0.0, -1.0} };
GLint faces[6][4] = { /* Vertex indices for the 6 faces of a cube. */
{0, 1, 2, 3}, {3, 2, 6, 7}, {7, 6, 5, 4},
{4, 5, 1, 0}, {5, 6, 2, 1}, {7, 4, 0, 3} };
GLfloat v[8][3]; /* Will be filled in with X,Y,Z vertexes. */
void
drawBox(void)
{
int i;
for (i = 0; i < 6; i++) {
glBegin(GL_QUADS);
glNormal3fv(&n[i][0]);
glVertex3fv(&v[faces[i][0]][0]);
glVertex3fv(&v[faces[i][1]][0]);
glVertex3fv(&v[faces[i][2]][0]);
glVertex3fv(&v[faces[i][3]][0]);
glEnd();
}
}
void
display(void)
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
drawBox();
// glutSwapBuffers();
}
void
init(void)
{
/* Setup cube vertex data. */
v[0][0] = v[1][0] = v[2][0] = v[3][0] = -1;
v[4][0] = v[5][0] = v[6][0] = v[7][0] = 1;
v[0][1] = v[1][1] = v[4][1] = v[5][1] = -1;
v[2][1] = v[3][1] = v[6][1] = v[7][1] = 1;
v[0][2] = v[3][2] = v[4][2] = v[7][2] = 1;
v[1][2] = v[2][2] = v[5][2] = v[6][2] = -1;
/* Enable a single OpenGL light. */
glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
glLightfv(GL_LIGHT0, GL_POSITION, light_position);
glEnable(GL_LIGHT0);
glEnable(GL_LIGHTING);
/* Use depth buffering for hidden surface elimination. */
glEnable(GL_DEPTH_TEST);
/* Setup the view of the cube. */
glMatrixMode(GL_PROJECTION);
gluPerspective( /* field of view in degree */ 40.0,
/* aspect ratio */ 1.0,
/* Z near */ 1.0, /* Z far */ 10.0);
glMatrixMode(GL_MODELVIEW);
gluLookAt(0.0, 0.0, 5.0, /* eye is at (0,0,5) */
0.0, 0.0, 0.0, /* center is at (0,0,0) */
0.0, 1.0, 0.); /* up is in positive Y direction */
/* Adjust cube position to be asthetic angle. */
glTranslatef(0.0, 0.0, -1.0);
glRotatef(60, 1.0, 0.0, 0.0);
glRotatef(-20, 0.0, 0.0, 1.0);
}
//===================>>> cubeOGLCanvasPane::cubeOGLCanvasPane <<<====================
cubeOGLCanvasPane::cubeOGLCanvasPane()
{
initDone = 0;
}
//===================>>> cubeOGLCanvasPane::~cubeOGLCanvasPane <<<====================
cubeOGLCanvasPane::~cubeOGLCanvasPane()
{
}
//======================>>> cubeOGLCanvasPane::graphicsInit <<<========================
void cubeOGLCanvasPane::graphicsInit(void)
{
vBaseGLCanvasPane::graphicsInit(); // Always call the superclass first!
// **** Your OpenGL initialization code goes here!
init(); // call original init code...
initDone = 1;
}
//======================>>> cubeOGLCanvasPane::HPage <<<========================
void cubeOGLCanvasPane::HPage(int shown, int top)
{
vBaseGLCanvasPane::HPage(shown, top);
}
//======================>>> cubeOGLCanvasPane::VPage <<<========================
void cubeOGLCanvasPane::VPage(int shown, int top)
{
vBaseGLCanvasPane::VPage(shown, top);
}
//=======================>>> cubeOGLCanvasPane::HScroll <<<======================
void cubeOGLCanvasPane::HScroll(int step)
{
vBaseGLCanvasPane::HScroll(step);
}
//======================>>> cubeOGLCanvasPane::VScroll <<<======================
void cubeOGLCanvasPane::VScroll(int step)
{
vBaseGLCanvasPane::VScroll(step);
}
//======================>>> cubeOGLCanvasPane::MouseDown <<<======================
void cubeOGLCanvasPane::MouseDown(int X, int Y, int button)
{
vBaseGLCanvasPane::MouseDown(X,Y,button);
}
//========================>>> cubeOGLCanvasPane::MouseUp <<<======================
void cubeOGLCanvasPane::MouseUp(int X, int Y, int button)
{
vBaseGLCanvasPane::MouseUp(X,Y,button);
}
//======================>>> cubeCanvasPane::MouseMove <<<======================
void cubeOGLCanvasPane::MouseMove(int x, int y, int button)
{
vBaseGLCanvasPane::MouseMove(x,y,button);
}
//=========================>>> cubeOGLCanvasPane::Redraw <<<======================
void cubeOGLCanvasPane::Redraw(int x, int y, int w, int h)
{
static int inRedraw = 0;
if (inRedraw || !initDone) // Don't draw until initialized
return;
inRedraw = 1; // Don't allow recursive redraws.
vglMakeCurrent(); // Typically done here
// *** Your drawing code typically goes here. You may
// insert it here, or just call a drawing routine.
display(); // the original demo code
vglFlush(); // After you draw, typically flush
inRedraw = 0; // Out of Redraw
}
//======================>>> cubeOGLCanvasPane::Resize <<<======================
void cubeOGLCanvasPane::Resize(int w, int h)
{
vBaseGLCanvasPane::Resize(w,h);
}
|
