• // Dragging vero e proprio
• glBegin(GL_LINE_LOOP);
• glVertex2i( ox,oy ); glVertex2i( ox,dy );
• glVertex2i( dx,dy ); glVertex2i( dx,oy );
• glEnd();
• dx = x;
• dy = y;
• glBegin(GL_LINE_LOOP);
• glVertex2i(
ox,oy ); glVertex2i( ox,dy );
• glVertex2i( dx,dy ); glVertex2i( dx,oy );
• glEnd();
• glFinish();