2차원에서의 투영변환

Overscript[n,^] = (a, b, c)

Overscript[X,^] ×Overscript[V,^] = (x, y, 1) × (v_x, v_y, 1)

Overscript[X,^]^′ = <Overscript[n,^], Overscript[V,^] >Overscript[X,^] - Overscript[V,^] <Overscript[n,^], Overscript[X,^] >

= ({{b v_y + c, -b v_x, -c v_x}, {-a v_y, a v_x + c, -c v_y}, {-a, -b, a v_x + b v_y}}) · ({{x}, {y}, {1}})