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
|
package de.lmu.ifi.dbs.elki.visualization.parallel3d.util;
/*
This file is part of ELKI:
Environment for Developing KDD-Applications Supported by Index-Structures
Copyright (C) 2015
Ludwig-Maximilians-Universität München
Lehr- und Forschungseinheit für Datenbanksysteme
ELKI Development Team
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import javax.media.opengl.GL2;
/**
* Renderer for simple overlays.
*
* TODO: make color configurable?
*
* @author Erich Schubert
* @since 0.6.0
*/
public abstract class AbstractSimpleOverlay {
/**
* Screen ratio.
*/
int width = 100;
/**
* Screen ratio.
*/
int height = 100;
/**
* Main render method
*
* @param gl GL context
*/
public final void render(GL2 gl) {
gl.glMatrixMode(GL2.GL_PROJECTION);
gl.glPushMatrix();
gl.glLoadIdentity();
gl.glMatrixMode(GL2.GL_MODELVIEW);
gl.glPushMatrix();
gl.glLoadIdentity();
gl.glOrtho(0, width, 0, height, -1, +1);
gl.glColor4f(0f, 0f, 0f, .5f);
// Fade background:
gl.glBegin(GL2.GL_QUADS);
gl.glVertex2f(0f, 0f);
gl.glVertex2f(width, 0f);
gl.glVertex2f(width, height);
gl.glVertex2f(0f, height);
gl.glEnd();
renderContents(gl);
gl.glMatrixMode(GL2.GL_PROJECTION);
gl.glPopMatrix();
gl.glMatrixMode(GL2.GL_MODELVIEW);
gl.glPopMatrix();
}
/**
* Render the actual overlay contents.
*
* @param gl GL context
*/
abstract void renderContents(GL2 gl);
/**
* Set screen ratio.
*
* @param width Screen width
* @param height Screen height
*/
public void setSize(int width, int height) {
this.width = width;
this.height = height;
}
}
|
