FBO start

A2/display.frag

+uniform sampler2D Texture;
+
+
+varying vec4 qt_TexCoord0;
+
+void main(void)
+{
+    gl_FragColor = texture2D(Texture, qt_TexCoord0.st);
+}
+

A2/display.vert

+attribute vec4 qt_Vertex;
+attribute vec4 qt_MultiTexCoord0;
+uniform mat4 qt_ModelViewProjectionMatrix;
+varying vec4 qt_TexCoord0;
+
+void main(void)
+{
+    gl_Position = qt_ModelViewProjectionMatrix * qt_Vertex;
+    qt_TexCoord0 = qt_MultiTexCoord0;
+}
+

A2/glview.cpp

 #include "glview.h"
 
 
+
 GLView::GLView(Scene *scene,Camera * camera,Controler *controler )
 {
     this->camera = camera;
@@ -29,6 +30,8 @@ void GLView::initializeGL ( ) {
     static GLfloat lightPosition[4] = { 0.0, 0.0, 4.0, 1.0 };
     glLightfv(GL_LIGHT0, GL_POSITION, lightPosition);
 
+
+
     //Shader Setup
     initShader();
     shader->bind();
@@ -49,6 +52,21 @@ void GLView::initShader()
     shader->addShader(fragment);
     if(!shader->link())
         qCritical()<< "Linking  failed"<<shader->log();
+
+
+    vertex = new QGLShader(QGLShader::Vertex);
+    if(!vertex->compileSourceFile(QLatin1String(":/display.vert")))
+        qCritical()<< "Vertex Shader 2failed"<< vertex->log();
+
+    fragment = new QGLShader(QGLShader::Fragment);
+    if(!fragment->compileSourceFile(QLatin1String(":/display.frag")))
+        qCritical()<< "Fragment Shader 2 failed"<< fragment->log();
+
+    displayShader = new QGLShaderProgram(this);
+    displayShader->addShader(vertex);
+    displayShader->addShader(fragment);
+    if(!displayShader->link())
+        qCritical()<< "Linking  failed"<<displayShader->log();
 }
 
 void GLView::home(){
@@ -60,9 +78,11 @@ void GLView::home(){
 
 void GLView::paintGL ()
 {
-  //  QGLFramebufferObjectFormat format;
-  //  format.setSamples();
-  //  format.setAttachment(QGLFramebufferObject::);
+    QGLFunctions functions = QGLFunctions(this->context());
+
+    shader->bind();
+   // functions.glBindFramebuffer(GL_FRAMEBUFFER,fbo);
+
 
     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
     glEnable(GL_DEPTH_TEST);
@@ -77,7 +97,6 @@ void GLView::paintGL ()
 
     shader->setUniformValue("shaded",true);
 
-
     //set Projection and Camera Rotation
     camera->setupCamera(aspect);
 
@@ -106,11 +125,85 @@ void GLView::paintGL ()
         glEnd ();
     }
 
+    shader->release();
+//    displayShader->bind();
+
+//    functions.glBindFramebuffer(GL_FRAMEBUFFER,fbo);
+//    glViewport(0,0,this->width(),this->height());
+//    glMatrixMode (GL_MODELVIEW);
+//    glLoadIdentity ();
+//    glMatrixMode (GL_PROJECTION);
+//    glLoadIdentity ();
+
+//    displayShader->setUniformValue("Texture",color);
+//    glBegin (GL_LINE_LOOP);
+//    glVertex3i (-1, -1, 0);
+//    glVertex3i (1, -1, 0);
+//    glVertex3i (1, 1, 0);
+//    glVertex3i (-1, 1, 0);
+//    glEnd ();
+
+
+
+//    displayShader->release();
+
+
 
 }
 void GLView::resizeGL(int width , int height )
 {
     aspect = 1.0*width/height;
+   qDebug()<<"Resize:"<<width<<height;
+
+    QGLFunctions functions = QGLFunctions(this->context());
+
+    functions.glGenFramebuffers(1, &fbo);
+    functions.glBindFramebuffer(GL_FRAMEBUFFER,fbo);
+
+
+
+    // Create the color buffer
+    glGenTextures(1, &color);
+    glBindTexture(GL_TEXTURE_2D, color);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
+
+    // Create the color buffer
+    glGenTextures(1, &picID);
+    glBindTexture(GL_TEXTURE_2D, picID);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
+
+
+    // Create the depth buffer
+    glGenTextures(1, &depth);
+    glBindTexture(GL_TEXTURE_2D, depth);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT32, width, height, 0, GL_RED, GL_BYTE, NULL);
+
+    functions.glFramebufferTexture2D(GL_FRAMEBUFFER,GL_COLOR_ATTACHMENT0,GL_TEXTURE_2D,color,0);
+    functions.glFramebufferTexture2D(GL_FRAMEBUFFER,GL_COLOR_ATTACHMENT1,GL_TEXTURE_2D,picID,0);
+    functions.glFramebufferTexture2D(GL_FRAMEBUFFER,GL_DEPTH_ATTACHMENT,GL_TEXTURE_2D,depth,0);
+
+    GLenum err = functions.glCheckFramebufferStatus(GL_FRAMEBUFFER);
+    if(err == GL_FRAMEBUFFER_COMPLETE){
+        qDebug()<<"FBO OK";
+    } else {
+         qDebug()<<"FBO ERROR"<<err;
+    }
+
+    functions.glBindFramebuffer(GL_FRAMEBUFFER, 0);
+
+
 }
 
 

A2/glview.h

@@ -7,6 +7,8 @@
 #include <controler.h>
 #include <camera.h>
 #include <scene.h>
+#include <gl/GLU.h>
+#include <QGLFunctions>
 
 class GLView : public QGLWidget
 {
@@ -34,6 +36,7 @@ public:
 
 private:
     QGLShaderProgram *shader;
+    QGLShaderProgram *displayShader;
     Scene *scene;
 
     Controler *controler;
@@ -43,6 +46,11 @@ private:
 
     GLdouble aspect;
 
+    GLuint fbo;
+     GLuint color;
+      GLuint picID;
+      GLuint depth;
+
 
     void initShader();
 };

A2/hellocube.pro

@@ -41,4 +41,6 @@ RESOURCES += \
 
 DISTFILES += \
     phong.frag \
-    phong.vert
+    phong.vert \
+    display.frag \
+    display.vert

A2/hellocube.qrc

@@ -18,5 +18,7 @@
         <file>img/viewports.png</file>
         <file>img/view-single.png</file>
         <file>img/delete.png</file>
+        <file>display.frag</file>
+        <file>display.vert</file>
     </qresource>
 </RCC>

A2/mainwindow.cpp

@@ -242,7 +242,6 @@ void MainWindow::updateStatusBar()
 {
     QString text = scene->getActive()->getName();
     statusBar->showMessage(text);
-    qDebug()<<"updateStatusBar()"<<text;
 }
 
 void MainWindow::showSingle(){

A2/phong.frag

@@ -30,7 +30,9 @@ void main(void)
                 );
 
     if(shaded)
-        gl_FragColor =  color;
+        gl_FragData[0] =  color;
     else
-        gl_FragColor = vec4(1,1,0,1);
+        gl_FragData[0] = vec4(1,1,0,1);
+
+    gl_FragData[1] = vec4(normal,1);
 }

A2/sceneprimitive.cpp

@@ -87,6 +87,7 @@ void ScenePrimitive::draw(){
         gluDisk( qobj, 0.0 , radius, tesselation, 1);
         break;
     case Cone:
+        gluQuadricOrientation(qobj,GLU_OUTSIDE);
         gluCylinder(qobj,radius,0,3,tesselation,tesselation);
         gluQuadricOrientation(qobj,GLU_INSIDE);
         gluDisk( qobj, 0.0, radius, tesselation, 1);