Bonjour

J'essaie d'adapter le code C++ de lighthouse sur le Color Picking en Java avec l'API JOGL.
Voici mes sources:
Main.java:
Code : Sélectionner tout - Visualiser dans une fenêtre à part
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
 
import com.sun.opengl.util.Animator;
import java.awt.Dimension;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
import javax.media.opengl.GLCanvas;
import javax.media.opengl.GLCapabilities;
import javax.swing.JFrame;
import javax.swing.JTabbedPane;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
 
public class Main implements WindowListener{
 
    private Animator anim, anim2;
    private JTabbedPane jTabbedPane;
    private GLCanvas canvas;
 
    public Main(){
        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
        GLCapabilities glc = new GLCapabilities();
        glc.setDoubleBuffered(true);
 
        canvas = new GLCanvas(glc);
        Renderer r = new Renderer(this);
        canvas.addGLEventListener(r);
 
        frame.getContentPane().add(canvas);
        frame.setMinimumSize(new Dimension(640, 480));
        frame.setVisible(true);
        canvas.requestFocus();
        canvas.requestFocusInWindow();
    }
 
    public static void main(String[]args){
        new Main();
    }
 
    public void windowOpened(WindowEvent arg0) {
    }
 
    public void windowClosing(WindowEvent arg0) {
        if(anim.isAnimating())
            anim.stop();
        if(anim2.isAnimating())
            anim2.stop();
    }
 
    public void windowClosed(WindowEvent arg0) {
    }
 
    public void windowIconified(WindowEvent arg0) {
    }
 
    public void windowDeiconified(WindowEvent arg0) {
    }
 
    public void windowActivated(WindowEvent arg0) {
    }
 
    public void windowDeactivated(WindowEvent arg0) {
    }
 
    public void refresh(){
        canvas.display();
    }
 
}
Et Renderer.java
Code : Sélectionner tout - Visualiser dans une fenêtre à part
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
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
 
import com.sun.opengl.util.BufferUtil;
import com.sun.opengl.util.GLUT;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.nio.ByteBuffer;
import javax.media.opengl.GL;
import javax.media.opengl.GLAutoDrawable;
import javax.media.opengl.GLEventListener;
import javax.media.opengl.glu.GLU;
 
public class Renderer implements GLEventListener, MouseListener{
 
    private final int RENDER = 1;
    private final int SELECT = 2;
    private final int SelBufferSize = 512;
    private int snowman_display_list;
    private float[]cam = new float[9];
    private int mode = RENDER;
    private int cursorX, cursorY;
    private Main main;
    private GLAutoDrawable drawable;
 
    public Renderer(Main main){
        this.main = main;
    }
 
    private void drawSnowMan(GL gl) {
        GLUT glut = new GLUT();
        // Draw Body	
        gl.glTranslatef(0.0f, 0.75f, 0.0f);
        glut.glutSolidSphere(0.75f, 20, 20);
 
 
// Draw Head
        gl.glTranslatef(0.0f, 1.0f, 0.0f);
        glut.glutSolidSphere(0.25f, 20, 20);
 
// Draw Eyes
        gl.glPushMatrix();
        gl.glColor3f(0.0f, 0.0f, 0.0f);
        gl.glTranslatef(0.05f, 0.10f, 0.18f);
        glut.glutSolidSphere(0.05f, 10, 10);
        gl.glTranslatef(-0.1f, 0.0f, 0.0f);
        glut.glutSolidSphere(0.05f, 10, 10);
        gl.glPopMatrix();
 
// Draw Nose
        gl.glColor3f(1.0f, 0.5f, 0.5f);
        gl.glRotatef(0.0f, 1.0f, 0.0f, 0.0f);
        glut.glutSolidCone(0.08f, 0.5f, 10, 2);
    }
 
    private int createDL(GL gl){
        int snowManDL;
 
	// Create the id for the list
	snowManDL = gl.glGenLists(1);
 
	gl.glNewList(snowManDL,gl.GL_COMPILE);
		drawSnowMan(gl);
	gl.glEndList();
 
	return(snowManDL);
    }
 
    public void init(GLAutoDrawable arg0) {
        final GL gl = arg0.getGL();
 
        this.drawable = arg0;
 
        gl.glEnable(gl.GL_DEPTH_TEST);
	gl.glEnable(gl.GL_CULL_FACE);
	snowman_display_list = createDL(gl);
        cam[0] = 1.5f;
	cam[1] = 3.75f;
	cam[2] = 3f;
 
	cam[3] = 1.5f;
	cam[4] = 1.75f;
	cam[5] = 0f;
 
	cam[6] = 0f;
	cam[7] = 1f;
	cam[8] = 0f;
 
        arg0.addMouseListener(this);
    }
 
    private void draw(GL gl) {
        // Draw ground
        gl.glColor3f(0.9f, 0.9f, 0.9f);
        gl.glBegin(gl.GL_QUADS);
        gl.glVertex3f(-100.0f, 0.0f, -100.0f);
        gl.glVertex3f(-100.0f, 0.0f, 100.0f);
        gl.glVertex3f(100.0f, 0.0f, 100.0f);
        gl.glVertex3f(100.0f, 0.0f, -100.0f);
        gl.glEnd();
 
// Draw 4 SnowMen
 
        gl.glColor3f(1.0f, 1.0f, 1.0f);
 
        for (int i = 0; i < 2; i++) {
            for (int j = 0; j < 2; j++) {
                gl.glPushMatrix();
                gl.glPushName(i * 2 + j);
                gl.glTranslatef((float)(i * 3.0), (float)0, (float)(-j * 3.0));
                gl.glColor3f(1.0f, 1.0f, 1.0f);
                gl.glCallList(snowman_display_list);
                gl.glPopName();
                gl.glPopMatrix();
            }
        }
    }
 
    private void drawPickingMode(GL gl) {
        // Draw 4 SnowMen
        gl.glDisable(gl.GL_DITHER);
        for (int i = 0; i < 2; i++) {
            for (int j = 0; j < 2; j++) {
                gl.glPushMatrix();
 
                switch (i * 2 + j) {
                    case 0:
                        gl.glColor3ub((byte)255, (byte)0, (byte)0);
                        break;
                    case 1:
                        gl.glColor3ub((byte)0, (byte)255, (byte)0);
                        break;
                    case 2:
                        gl.glColor3ub((byte)0, (byte)0, (byte)255);
                        break;
                    case 3:
                        gl.glColor3ub((byte)130, (byte)0, (byte)130);
                        break;
                }
 
                gl.glTranslatef((float)(i * 3.0), (float)0, (float)(-j * 3.0));
                gl.glCallList(snowman_display_list);
                gl.glPopMatrix();
            }
        }
        gl.glEnable(gl.GL_DITHER);
    }
 
    private void processPick(GL gl) {
        int[]viewport = new int[4];
	ByteBuffer pixel = BufferUtil.newByteBuffer(3);
 
	gl.glGetIntegerv(gl.GL_VIEWPORT, viewport, 0);
 
	gl.glReadPixels(cursorX, viewport[3] - cursorY, 1, 1, gl.GL_RGB, gl.GL_UNSIGNED_BYTE, pixel);
 
        System.out.println(pixel.get(0)+" "+pixel.get(1)+" "+pixel.get(2));
        if (pixel.get(0) == 255) {
            System.out.println("You picked the 1st snowman on the 1st row");
        } else if (pixel.get(1) == 255) {
            System.out.println("You picked the 1st snowman on the 2nd row");
        } else if (pixel.get(2) == 255) {
            System.out.println("You picked the 2nd snowman on the 1st row");
        } else if (pixel.get(0) == 250) {
            System.out.println("You picked the 2nd snowman on the 2nd row");
        } else {
            System.out.println("You didn't click a snowman!");
        }
        System.out.println("\n");
    }
 
    public void display(GLAutoDrawable arg0) {
        final GL gl = arg0.getGL();
 
        gl.glClear(gl.GL_COLOR_BUFFER_BIT | gl.GL_DEPTH_BUFFER_BIT);
 
	gl.glLoadIdentity();
 
 
	new GLU().gluLookAt(cam[0], cam[1], cam[2], cam[3], cam[4], cam[5], cam[6], cam[7], cam[8]);
 
        if (mode == SELECT)
		drawPickingMode(gl);
	else
		draw(gl);
 
	if (mode == SELECT) {
		processPick(gl);
		mode = RENDER;
	}
	else
            arg0.swapBuffers();
    }
 
    public void reshape(GLAutoDrawable arg0, int arg1, int arg2, int w, int h) {
        final GL gl = arg0.getGL();
        float ratio;
	// Prevent a divide by zero, when window is too short
	// (you cant make a window of zero width).
 
	if(h == 0)
		h = 1;
 
	ratio = 1.0f * w / h;
	// Reset the coordinate system before modifying
	gl.glMatrixMode(gl.GL_PROJECTION);
	gl.glLoadIdentity();
 
	// Set the viewport to be the entire window
    	gl.glViewport(0, 0, w, h);
 
	// Set the clipping volume
	new GLU().gluPerspective(45,ratio,0.1,1000);
 
	// setting the camera now
	gl.glMatrixMode(gl.GL_MODELVIEW);
    }
 
    public void displayChanged(GLAutoDrawable arg0, boolean arg1, boolean arg2) {}
 
    public void mouseClicked(MouseEvent e) {
        if(e.getButton()==MouseEvent.BUTTON1){
            cursorX = e.getPoint().x;
            cursorY = e.getPoint().y;
            mode = SELECT;
            this.main.refresh();
        }
    }
 
    public void mousePressed(MouseEvent e) {
    }
 
    public void mouseReleased(MouseEvent e) {
    }
 
    public void mouseEntered(MouseEvent e) {
    }
 
    public void mouseExited(MouseEvent e) {
    }
 
}
Mais il y a un problème: en effet, au clic, je tombe sur le rendering de sélection OR, ceci ne devrait pas être visible à l'utilisation.
Aurais-je oublié quelque chose ?
Merci d'avance de votre aide sur cette adaptation.

@++