   gradient background
  Hi everybody,   I am trying to make a gradient background for a 3D view, using smooth blending. I try to make the upper points with a color, and bottom points with another one.   //... do some initialization and 3D drawing// clear the color and depth buffersglClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);glEnable(GL_LIGHTING);glPushMatrix();// switch to projection modeglMatrixMode(GL_PROJECTION);// save previous matrix which contains the //settings for the perspective projectionglPushMatrix();// reset matrixglLoadIdentity();// set a 2D orthographic projectiongluOrtho2D(0, width, 0, height);// invert the y axis, down is positiveglScalef(1, -1, 1);// mover the origin from the bottom left corner// to the upper left cornerglTranslatef(0, -height, 0);glMatrixMode(GL_MODELVIEW);glPushMatrix();glLoadIdentity();glShadeModel(GL_SMOOTH);glEnable(GL_LIGHTING);float curcol[3];glGetFloatv(GL_CURRENT_COLOR,curcol);//glColor3f(1.0, 0.0, 0.0);glGetFloatv(GL_CURRENT_COLOR,curcol);glBegin(GL_QUADS);glColor3i(1,0,0);glVertex2i(0,0);glVertex2i(0,height);glColor3i(0,1,0);glVertex2i(width,height);glVertex2i(width,0);glEnd();glGetFloatv(GL_CURRENT_COLOR,curcol);glMatrixMode(GL_PROJECTION);glPopMatrix();glMatrixMode(GL_MODELVIEW);glPopMatrix();///////////////////////////The problem is that the color never changes. For examples if the last color i was using when doing the 3D drawing was blue. I get the background as a blue rectangle ( although i am using different colors to draw it). As you u see in the code i am using glGetFloatv(GL_CURRENT_COLOR,curcol); to make sure that the color really changes.Thanx in advance   
  ok first, disable lighting, lighting on a background is a bad thing.second, glColor3i(1,0,0); is not red it's black, try usingl glColor3f instead   ;  Hi lc_overlord;  Thanx for replying. I already tried the glColor3f thing, and it didn't work. As you see in my code i use glGetFloatv(GL_CURRENT_COLOR,curcol); to make sure the current color has changed to the value that i want, and although i find it changed the rectangle is drawn with the last color used before this code segment start being executed.Thanx anyway;  Try (as per lc_overlord's suggestion):glDisable(GL_LIGHTING);glBegin(GL_QUADS);    glColor3f(1.0f, 0.0f, 0.0f);    glVertex2i(0,0);    glVertex2i(0,height);    glColor3f(0.0f, 1.0f, 0.0f);    glVertex2i(width,height);    glVertex2i(width,0);glEnd();Cheers,- llvllatrix   