glVertex3f (v1.x,v1.y,v1.z);. glVertex3f(v2.x,v2.y,v2.z);. glVertex3f(v3.x,v3.y,v3.z);. glEnd();. glBegin(GL_QUADS);. glVertex3f(v1.x,v1.y,v1.z);.
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