[Solved] Render to texture problem

Hi,

basically when I am rendering to texture, it looks like some part of the texture go lost..

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

package org.yourorghere;

import com.jogamp.opengl.util.GLBuffers;
import java.awt.Component;
import java.nio.ByteBuffer;
import javax.media.opengl.*;
import javax.media.opengl.glu.GLU;


public class GLRenderer implements GLEventListener {

    int[] textureID = new int[1];
    private int floorWidth=48, floorHeight=48;
    int[] frameBufferID = new int[1];
    int[] depthRenderBufferID = new int[1];
    ByteBuffer pixels;
    GLU glu;
    
    public void init(GLAutoDrawable drawable) {
        glu = new GLU();
        
        System.out.println("init");
        
        GL2 gl = drawable.getGL().getGL2();
        System.err.println("INIT GL IS: " + gl.getClass().getName());

        // Setup the drawing area and shading mode
        gl.glShadeModel(GL2.GL_SMOOTH); // try setting this to GL_FLAT and see what happens.
        
        renderShadowsToTexture(gl);
        
        gl.glClearColor(0.5f, 0.5f, 0.5f, 1.0f);
    }

    public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height) {
    }

    public void display(GLAutoDrawable drawable) {
        GL2 gl = drawable.getGL().getGL2();

        System.out.println("display");
        
        float a = 1.0f;
        
        gl.glMatrixMode(GL2.GL_PROJECTION);
        // Reset the current matrix to the "identity"
        gl.glLoadIdentity();
        glu.gluPerspective(60.0f, (((Component)drawable).getWidth()/
                ((Component)drawable).getHeight()), 1.0f, 50.0f);

        gl.glMatrixMode(GL2.GL_MODELVIEW);
        gl.glLoadIdentity();
        glu.gluLookAt(0.0f, 0.0f, 0.0f, 
                      0.0f, 0.0f, 1.0f, 
                      0.0f, 1.0f, 0.0f);
        
        // Clear the drawing area
        gl.glClear(GL2.GL_COLOR_BUFFER_BIT | GL2.GL_DEPTH_BUFFER_BIT);

        gl.glTranslatef(-2.5f, 0.0f, 0.0f);
        
        gl.glEnable(GL2.GL_TEXTURE_2D);
        
        gl.glBindTexture(GL2.GL_TEXTURE_2D, textureID[0]);
        
            gl.glColor3f(1.0f, 1.0f, 1.0f);
            gl.glBegin(GL2.GL_QUADS);
                gl.glTexCoord2f(0, 0);
                gl.glVertex3f(-1.0f,-1.0f, 0.0f);
                gl.glTexCoord2f(0, a);
                gl.glVertex3f(-1.0f, 1.0f, 0.0f);
                gl.glTexCoord2f(1.0f, 1.0f);
                gl.glVertex3f( 1.0f, 1.0f, 0.0f);
                gl.glTexCoord2f(a, 0);
                gl.glVertex3f( 1.0f,-1.0f, 0.0f);
            gl.glEnd();
        gl.glDisable(GL2.GL_TEXTURE_2D);
        
        gl.glRasterPos2d(3, -2);
        gl.glDrawPixels(floorWidth, floorHeight, GL2.GL_RGBA, GL2.GL_UNSIGNED_BYTE, pixels);
        
    }
    
    private void renderShadowsToTexture(GL2 gl) {
        gl.glGenTextures(1, textureID, 0);
        gl.glBindTexture(GL2.GL_TEXTURE_2D, textureID[0]);
        
        gl.glTexParameteri(GL2.GL_TEXTURE_2D, GL2.GL_TEXTURE_MIN_FILTER, GL2.GL_NEAREST);
        gl.glTexParameteri(GL2.GL_TEXTURE_2D, GL2.GL_TEXTURE_MAG_FILTER, GL2.GL_NEAREST);
        
        // null means reserve texture memory, but texels are undefined
        gl.glTexImage2D(GL2.GL_TEXTURE_2D, 0, GL2.GL_RGB, floorWidth, floorHeight,
                                                    0, GL2.GL_RGB, GL2.GL_FLOAT, null);
        
        gl.glGenFramebuffers(1, frameBufferID, 0);
        gl.glBindFramebuffer(GL2.GL_FRAMEBUFFER, frameBufferID[0]);
        
        //Attach 2D texture to this FBO
        gl.glFramebufferTexture2D(GL2.GL_FRAMEBUFFER, GL2.GL_COLOR_ATTACHMENT0, 
                                        GL2.GL_TEXTURE_2D, textureID[0], 0);
        
        // depth buffer
        gl.glGenRenderbuffers(1, depthRenderBufferID, 0);
        gl.glBindRenderbuffer(GL2.GL_RENDERBUFFER, depthRenderBufferID[0]);
        gl.glRenderbufferStorage(GL2.GL_RENDERBUFFER, GL2.GL_DEPTH_COMPONENT, 
                                                floorWidth, floorHeight);
        gl.glFramebufferRenderbuffer(GL2.GL_FRAMEBUFFER, GL2.GL_DEPTH_ATTACHMENT,
                                            GL2.GL_RENDERBUFFER, depthRenderBufferID[0]);
        
        if(gl.glCheckFramebufferStatus(GL2.GL_FRAMEBUFFER) == GL2.GL_FRAMEBUFFER_COMPLETE)
            System.out.println("[Viewer] GL_FRAMEBUFFER_COMPLETE!!");
        else
            System.out.println("..cazzo ^^");
        
        gl.glMatrixMode(GL2.GL_MODELVIEW);
        gl.glPushMatrix();
        gl.glLoadIdentity();
        
        gl.glClearColor(0.9f, 0.9f, 0.9f, 1.0f);
        gl.glClear(GL2.GL_COLOR_BUFFER_BIT);
        
        gl.glPointSize(10.0f);
        gl.glBegin(GL2.GL_POINTS);
            gl.glColor3f(0.0f, 1.0f, 0.0f);
            gl.glVertex2d(1.0f, 1.0f);      // THIS IS NOT SHOWN
            gl.glColor3f(0.0f, 0.0f, 1.0f);
            gl.glVertex2d(-1.0f, -1.0f);
            gl.glVertex2d(-0.9f, -0.9f);
        gl.glEnd();
        
        gl.glPopMatrix();

        pixels = GLBuffers.newDirectByteBuffer(floorWidth*floorHeight*4);

        gl.glReadPixels(0, 0, floorWidth, floorHeight, GL2.GL_RGBA, 
                                                    GL2.GL_UNSIGNED_BYTE, pixels);
                                                    
                                                    
        System.out.println("glIsTexture: "+gl.glIsTexture(textureID[0]));
        
        //  bind the back buffer for rendering
        gl.glBindFramebuffer(GL2.GL_FRAMEBUFFER, 0);
    }

    public void dispose(GLAutoDrawable glad) {
//        throw new UnsupportedOperationException("Not supported yet.");
        System.out.println("dispose");
    }

}

Starting from the left, the triangle and the first quad are rendered normally using the <i>display()</i> while the last quad on the right and the one below are respectively the quad rendered with the texture mapped on it and the quad showing what is inside the texture itself

Basically I do not see the red point, only the blue ones

Why?