图形学

gw.setTransform(Matrix3 1)

gw.startTriangles()

gw.triangle #([0,0,0], [50,0,0], [50,50,0]) #(red,red,red)

gw.triangle #([0,0,0], [50,50,0], [0,50,0]) #(green,green,green)

gw.endTriangles()

gw.enlargeUpdateRect #whole 

gw.updateScreen()