A Paste by eMCee

glBegin(GL_QUADS);         glEnable(GL_BLEND);         glColor4f(0.0f,0.0f,1.0f,0.5f);         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);         glVertex3f(-10.0f, 5.0f, -40.0f);         glVertex3f(-10.0f, 10.0f, -40.0f);         glVertex3f(-10.0f, 10.0f, -35.0f);         glVertex3f(-10.0f, 5.0f, -35.0f);         glDisable(GL_BLEND);     glEnd();