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
| import java.awt.*;
import java.awt.event.*;
import javax.media.opengl.*;
import javax.media.opengl.glu.GLU;
import javax.media.opengl.GLCanvas;
public class lesson02 {
static class Renderer
implements GLEventListener,
KeyListener
{
public void display(GLAutoDrawable gLADrawable)
{
final GL gl = gLADrawable.getGL();
gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
gl.glLoadIdentity();
gl.glTranslatef(-1.5f, 0.0f, -6.0f);
gl.glBegin(GL.GL_TRIANGLES); gl.glVertex3f( 0.0f, 1.0f, 0.0f); gl.glVertex3f(-1.0f,-1.0f, 0.0f); gl.glVertex3f( 1.0f,-1.0f, 0.0f); gl.glEnd(); gl.glTranslatef(3.0f, 0.0f, 0.0f);
gl.glBegin(GL.GL_QUADS); gl.glVertex3f(-1.0f, 1.0f, 0.0f); gl.glVertex3f( 1.0f, 1.0f, 0.0f); gl.glVertex3f( 1.0f,-1.0f, 0.0f); gl.glVertex3f(-1.0f,-1.0f, 0.0f); gl.glEnd(); gl.glFlush();
}
public void displayChanged(GLAutoDrawable gLDrawable, boolean modeChanged, boolean deviceChanged)
{
}
public void init(GLAutoDrawable gLDrawable)
{
final GL gl = gLDrawable.getGL();
gl.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
gl.glShadeModel(GL.GL_FLAT);
gLDrawable.addKeyListener(this);
}
public void reshape(GLAutoDrawable gLDrawable, int x, int y, int width, int height)
{
final GL gl = gLDrawable.getGL();
final GLU glu = new GLU();
if (height <= 0) height = 1;
final float h = (float)width / (float)height;
gl.glViewport(0, 0, width, height);
gl.glMatrixMode(GL.GL_PROJECTION);
gl.glLoadIdentity();
glu.gluPerspective(45.0f, h, 1.0, 20.0);
gl.glMatrixMode(GL.GL_MODELVIEW);
gl.glLoadIdentity();
}
public void keyPressed(KeyEvent e)
{
if (e.getKeyCode() == KeyEvent.VK_ESCAPE)
System.exit(0);
}
public void keyReleased(KeyEvent e) {}
public void keyTyped(KeyEvent e) {}
}
public static void main(String[] args)
{
Frame frame = new Frame("Lesson 2: Your First Polygon");
GLCanvas canvas = new GLCanvas(new GLCapabilities());
canvas.addGLEventListener(new Renderer());
frame.add(canvas);
frame.setSize(640, 480);
frame.addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
});
frame.show();
canvas.requestFocus();
}
} |
