成员的完整列表，这些成员属于 eve::pixelworld_physics::PixelTerrainContact,包括所有继承而来的类成员

cellX	eve::pixelworld_physics::PixelTerrainContact
cellY	eve::pixelworld_physics::PixelTerrainContact
depth	eve::pixelworld_physics::PixelTerrainContact
fraction	eve::pixelworld_physics::PixelTerrainContact
hit	eve::pixelworld_physics::PixelTerrainContact
material	eve::pixelworld_physics::PixelTerrainContact
normalX	eve::pixelworld_physics::PixelTerrainContact
normalY	eve::pixelworld_physics::PixelTerrainContact
pointX	eve::pixelworld_physics::PixelTerrainContact
pointY	eve::pixelworld_physics::PixelTerrainContact