grid

A2/glview.cpp

@@ -7,6 +7,9 @@ GLView::GLView(Scene *scene,Camera * camera,Controler *controler )
     this->camera = camera;
     this->scene = scene;
     this->controler = controler;
+    gridSize = 5;
+    gridStepSize = 1;
+    isGridEnabled = true;
 }
 
 QSize GLView::minimumSizeHint() const
@@ -103,6 +106,12 @@ void GLView::paintGL ()
     //draw Scene
     scene->draw();
 
+    if(isGridEnabled){
+         drawGrid();
+    }
+
+
+
     if(isActive){
         glDisable(GL_DEPTH_TEST);
         glMatrixMode (GL_MODELVIEW);
@@ -126,6 +135,7 @@ void GLView::paintGL ()
     }
 
     shader->release();
+
 //    displayShader->bind();
 
 //    functions.glBindFramebuffer(GL_FRAMEBUFFER,fbo);
@@ -147,9 +157,106 @@ void GLView::paintGL ()
 
 //    displayShader->release();
 
+}
+
+
+void GLView::drawGrid()
+{
+    shader->release();
+
+    GLfloat specularColor[] = {0,0,0};
+    GLfloat shininess[] = {128};
+    glMaterialfv(GL_FRONT,GL_SPECULAR,specularColor);
+    glMaterialfv(GL_FRONT,GL_SHININESS, shininess);
+    GLfloat grey[] = {1,0.5,0.5};
+    glMaterialfv(GL_FRONT,GL_DIFFUSE,grey);
+    glNormal3f(0,1,0);
+
+    glDisable(GL_LIGHTING);
+    glEnable(GL_COLOR_MATERIAL);
+
+    glLineWidth(1);
+    glPolygonMode(GL_FRONT_AND_BACK,GL_LINES);
+    glBegin(GL_LINES);
+    float stepSize = gridStepSize;
+    float x = stepSize;
+    float y = stepSize;
+    if (stepSize <= 0) stepSize = 1;
+
+    for(; x < gridSize; x += stepSize){
+            glVertex3f(x,0,-gridSize);
+            glVertex3f(x,0,gridSize);
+            glVertex3f(-x,0,-gridSize);
+            glVertex3f(-x,0,gridSize);
+    }
+    for (; y < gridSize; y += stepSize){
+            glVertex3f(-gridSize, 0, y);
+            glVertex3f(gridSize,0,y);
+        glVertex3f(-gridSize,0,-y);
+        glVertex3f(gridSize,0,-y);
+    }
+    glEnd();
+
+    glBegin(GL_LINES);
+    x = stepSize;
+    y = stepSize;
+    if (stepSize <= 0) stepSize = 1;
+
+    for(; x < gridSize; x += stepSize){
+            glVertex3f(0,x,-gridSize);
+            glVertex3f(0,x,gridSize);
+            glVertex3f(0,-x,-gridSize);
+            glVertex3f(0,-x,gridSize);
+    }
+    for (; y < gridSize; y += stepSize){
+            glVertex3f(0,-gridSize,  y);
+            glVertex3f(0,gridSize,y);
+        glVertex3f(0,-gridSize,-y);
+        glVertex3f(0,gridSize,-y);
+    }
+    glEnd();
+
+    glBegin(GL_LINES);
+    x = stepSize;
+    y = stepSize;
+    if (stepSize <= 0) stepSize = 1;
+
+    for(; x < gridSize; x += stepSize){
+            glVertex3f(x,-gridSize,0);
+            glVertex3f(x,gridSize,0);
+            glVertex3f(-x,-gridSize,0);
+            glVertex3f(-x,gridSize,0);
+    }
+    for (; y < gridSize; y += stepSize){
+            glVertex3f(-gridSize, y,0);
+            glVertex3f(gridSize,y,0);
+        glVertex3f(-gridSize,-y,0);
+        glVertex3f(gridSize,-y,0);
+    }
+    glEnd();
+
+    glBegin(GL_LINES);
+    glVertex3f(0,0,-gridSize);
+    glVertex3f(0,0,gridSize);
+    glEnd();
+    glBegin(GL_LINES);
+    glVertex3f(-gridSize,0,0);
+    glVertex3f(gridSize,0,0);
+    glEnd();
+    glBegin(GL_LINES);
+    glVertex3f(0,-gridSize,0);
+    glVertex3f(0,gridSize,0);
+    glEnd();
 
 
+
+
+    glPolygonMode(GL_FRONT,GL_FILL);
+    glEnable(GL_LIGHTING);
+    shader->bind();
+
 }
+
 void GLView::resizeGL(int width , int height )
 {
     aspect = 1.0*width/height;

A2/glview.h

@@ -51,8 +51,12 @@ private:
       GLuint picID;
       GLuint depth;
 
-
+    void drawGrid();
     void initShader();
+
+    float gridStepSize;
+    float gridSize;
+    bool isGridEnabled;
 };
 
 #endif // GLVIEW_H