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
|
int nb_proj;
double screen_width;
double screen_height;
double rect_width = 0;
double rect_height = 0;
double rect_top_left_x = 0;
double rect_top_left_y = 0;
int Win1;
// des points que je vais afficher
std::vector<CvPoint2D64d> * the_points;
// mon main...
// (en fait mon application openGL est appellée par un autre code, c pr ça que c pas un main)
int start(std::vector<CvPoint2D64d> * points, int nb_projectors, double screen_width, double screen_height)
{
// initialize the global variables
nb_proj = nb_projectors;
::screen_width = screen_width;
::screen_height = screen_height;
the_points = new std::vector<CvPoint2D64d> (*points);
// g mis n'importe quoi ici...
int arg1 = 1;
char * arg2 = "window";
glutInit(&arg1, &arg2);
glutInitWindowSize(640, 480);
glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE);
Win1 = glutCreateWindow("Display Wall Simlator");
glShadeModel(GL_FLAT);
glutReshapeFunc(Reshape);
glutDisplayFunc(Draw);
glutKeyboardFunc(myGlutKeyboard);
glutMouseFunc(myGlutMouse);
printf("press 'H' for help\n");
glutMainLoop();
return 0;
}
////////////////////////////////////////////////////////////////////////////
void Reshape(int width, int height)
{
glViewport(0, 0, width, height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(45, float(width)/float(height), 1, 5000);
glMatrixMode(GL_MODELVIEW);
glutPostRedisplay();
}
////////////////////////////////////////////////////////////////////////////
void Draw()
{
glClearColor(.65, .65, .65, 0.0);
glClear(GL_COLOR_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
gluLookAt(0, 0, 3200, 0, 0, 0, 0, 1, 0);
glTranslated(-screen_width/2, screen_height/2, 0);
glColor4f(0.0f, 1.0f, 0.0f, 0.0f);
int i = 0;
for (i = 0; i < nb_proj; i++)
{
glBegin(GL_LINE_LOOP);
for (int j = 0; j < 4; j++)
glVertex2d(the_points->at(j + 4*i).x, -the_points->at(j + 4*i).y);
glEnd();
}
glColor4f(0.0f, 0.0f, 1.0f, 0.0f);
glBegin(GL_LINE_LOOP);
glVertex2d(0, 0);
glVertex2d(screen_width, 0);
glVertex2d(screen_width, -screen_height);
glVertex2d(0, -screen_height);
glEnd();
printf("DRAW : rect_top_left_x = %g, rect_top_left_y = %g\n", rect_top_left_x, rect_top_left_y);
printf("\trect_width = %g, rect_height = %g\n\n", rect_width, rect_height);
glColor4f(1.0f, 0.0f, 0.0f, 0.0f);
glTranslated(rect_top_left_x, rect_top_left_y, 0);
glBegin(GL_LINE_LOOP); // GL_LINE_LOOP
glVertex2d(0, 0);
glVertex2d(rect_width, 0);
glVertex2d(rect_width, -rect_height);
glVertex2d(0, -rect_height);
glEnd();
glutSwapBuffers();
}
void myGlutKeyboard(unsigned char key, int x, int y)
{
switch (key)
{
// move the center of the rectangle
case 's':
rect_top_left_x--;
glutPostRedisplay();
break;
case 'd':
rect_top_left_x++;
glutPostRedisplay();
break;
// etc...
default:
break;
}
glutPostRedisplay();
}
void myGlutMouse(int button, int button_state, int x, int y )
{
double ox, oy, oz;
double projectionMatrix[16], modelviewMatrix[16];
int viewport[4];
glGetDoublev(GL_PROJECTION_MATRIX, projectionMatrix);
glGetDoublev(GL_MODELVIEW_MATRIX, modelviewMatrix);
glGetIntegerv(GL_VIEWPORT, viewport);
double wy = viewport[3] - y; //le depth buffer est inversé en y
//par rapport à ce que l'on voit à l'écran
double wx = x;
double wz;
glReadPixels((int)wx, (int)wy, 1, 1, GL_DEPTH_COMPONENT, GL_FLOAT, &wz);
gluUnProject(wx, wy, wz, modelviewMatrix, projectionMatrix, viewport, &ox, &oy, &oz);
printf("ox = %g, oy = %g, oz = %g\n", ox, oy, oz);
if (button == GLUT_LEFT_BUTTON && button_state == GLUT_DOWN)
{
rect_top_left_x = ox;
rect_top_left_y = oy;
}
if (button == GLUT_LEFT_BUTTON && button_state == GLUT_UP)
{
rect_width = fabs(ox - rect_top_left_x);
rect_height = fabs(oy - rect_top_left_y);
}
printf("MOUSE : rect_top_left_x = %g, rect_top_left_y = %g\n", rect_top_left_x, rect_top_left_y);
printf("\trect_width = %g, rect_height = %g\n\n", rect_width, rect_height);
glutPostRedisplay();
} |
coordonnées du point cliqué
Répondre avec citation
Partager