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
|
#!/usr/bin/perl -w
use strict;
use OpenGL qw(:all);
use PDL;
use PDL::Constants qw(PI);
$PDL::BIGPDL = 1;
my $pending = 0;
#--- init demo data
my $tsl = 60000; # time slices;
my $channels = 10; # channels to plot
my $time_points = pdl( sequence( $tsl ) /1000 )->float();
my $f0 = 2; # Hz
my $data = pdl( zeroes($channels,$time_points->dim(-1) ) )->float();
print"---> START init demo data\n";
print" Channels: $channels\n";
print" TSLs : $tsl\n";
my $t00 = time;
my $f = pdl( sequence($channels) ) +1 * $f0;
# $data.= (sin( $time_points * $f->transpose *2* PI) )->transpose;
$data.= (sin( $time_points * $f->transpose * PI) + cos( $time_points
* $f->transpose * rand(100) * PI ) )->transpose;
$t00 = time() - $t00;
print"---> DONE init demo data: $t00\n";
#---------------------------------------------------------#
#---- update_plot_pdl_to_vbo -------------------------#
#--- copy pdl data to opengl vertex buffer
#--- generates a sub plot for each channel #---------------------------------------------------------#
sub update_plot_pdl_to_vbo{
my ($x,$y) = @_;
return if ( $pending );
$pending = 1;
my $t00 = time;
#--- init data for vertex buffer obj
my $data_4_vbo = pdl( zeroes(2,$data->dim(-1) ) )->float();
my $data_4_vbo_timepoints = $data_4_vbo->slice("(0),:");
my $data_4_vbo_signal = $data_4_vbo->slice("(1),:");
$data_4_vbo_timepoints .= $time_points;
my $data_vbo = $data_4_vbo->flat;
my $float_size = 4;
glClear(GL_COLOR_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glColor3f(0.0,0.0,1.0);
#--- create OGL verts buffer
glDisableClientState(GL_VERTEX_ARRAY);
my $VertexObjID = glGenBuffersARB_p(1);
glBindBufferARB(GL_ARRAY_BUFFER_ARB,$VertexObjID);
my $ogl_array = OpenGL::Array->new_scalar(GL_FLOAT,
$data_vbo->get_dataref,$data_vbo->dim(0)*$float_size);
glBufferDataARB_p(GL_ARRAY_BUFFER_ARB,$ogl_array,GL_DYNAMIC_DRAW_ARB);
$ogl_array->bind($VertexObjID);
glVertexPointer_p(2,$ogl_array);
glEnableClientState(GL_VERTEX_ARRAY);
#---start sub plots
my $w = glutGet( GLUT_WINDOW_WIDTH );
my $h = glutGet( GLUT_WINDOW_HEIGHT );
my $w0 = 10;
my $w1 = $w-10;
my $h0 = 0;
my $dh = int( $h / $data->dim(0) );
my $h1 = $dh;
my $xmin = $time_points->min;
my $xmax = $time_points->max;
my $ymin = $data->min * 1.2;
my $ymax = $data->max * 1.2;
#--- copy data to VBO
for ( my $i=0; $i < $data->dim(0); $i++ )
{
#--- sub plot window
setViewport($w0,$w1,$h0,$h1);
setWindow($xmin,$xmax,$ymin,$ymax );
#--- draw zero line
glLineWidth(1);
glColor3f(1,1,1);
glBegin(GL_LINES);
glVertex2f($xmin,0.0);
glVertex2f($xmax,0.0);
glEnd();
#--- start drawing signal
glLineWidth(2);
glColor3f(rand(1), rand(1),1.0);# mix color for each signal
#--- copy pdl data to VBO thank's vividsnow !!!
$data_4_vbo_signal .= $data->slice("($i),:");
$ogl_array =
OpenGL::Array->new_scalar(GL_FLOAT,$data_vbo->get_dataref,$data_vbo->dim(0)*$float_size);
glBufferSubDataARB_p(GL_ARRAY_BUFFER_ARB,0,$ogl_array);
glDrawArrays(GL_LINE_STRIP,0,$data_4_vbo_timepoints->dim(-1)-1 );
$h0 += $dh;
$h1 += $dh + 1;
} # for
glBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
glDisableClientState(GL_VERTEX_ARRAY);
glFlush();
glutSwapBuffers();
$pending = undef;
$t00 = time() - $t00;
print" done <update_plot_pdl_to_vbo> Time to update: $t00\n";
} # end of update_plot_pdl_to_vbo
#---------------------------------------------------------#
#---- setWindow -------------------------#
#---------------------------------------------------------#
sub setWindow{
my ($l,$r,$b,$t) = @_;
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluOrtho2D($l,$r,$b,$t);
} # end of setWindow
#---------------------------------------------------------#
#---- setViewport -------------------------#
#---------------------------------------------------------#
sub setViewport{
my ($l,$r,$b,$t) = @_;
glViewport($l,$b,$r-$l,$t-$b);
}# end of setViewport
#---------------------------------------------------------#
#---- myReshape -------------------------#
#---------------------------------------------------------#
sub myReshape{
my($w,$h) = @_;
return if ( $pending );
glViewport(0,0,$w,$h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluOrtho2D(0.0,$w,0.0,$h);
} # end of reshape
#=== MAIN ===============================================
glClearColor(1.0,1.0,1.0,0.0);
glColor3f(0.0,0.0,1.0);
glLineWidth(2);
glutInit();
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_ALPHA);
glutInitWindowSize(300,400);
glutInitWindowPosition(10,10);
my $IDwindow = glutCreateWindow("PDL OGL TEST"); glutDisplayFunc( sub{ update_plot_pdl_to_vbo(@_) } );
glutReshapeFunc( sub{ myReshape(@_) } );
glutMainLoop();
|
