Method Meta_Mul

LuaSTGPlus/LuaWrapper.cpp:138–173

			return 1;
		}
		static int Meta_Mul(lua_State* L)LNOEXCEPT
		{
			lua_Number tFactor;
			fcyColor *p = nullptr, *pResult = nullptr;
			if (lua_isnumber(L, 1))  // arg1为数字，则arg2必为lstgColor
			{
				tFactor = luaL_checknumber(L, 1);
				p = static_cast<fcyColor*>(luaL_checkudata(L, 2, TYPENAME_COLOR));
			}
			else if (lua_isnumber(L, 2))  // arg2为数字，则arg1必为lstgColor
			{
				tFactor = luaL_checknumber(L, 2);
				p = static_cast<fcyColor*>(luaL_checkudata(L, 1, TYPENAME_COLOR));
			}
			else  // arg1和arg2都必为lstgColor
			{
				fcyColor* pA = static_cast<fcyColor*>(luaL_checkudata(L, 1, TYPENAME_COLOR));
				fcyColor* pB = static_cast<fcyColor*>(luaL_checkudata(L, 2, TYPENAME_COLOR));
				pResult = CreateAndPush(L);
				pResult->Set(
					::min((int)pA->a * pB->a, 255),
					::min((int)pA->r * pB->r, 255),
					::min((int)pA->g * pB->g, 255),
					::min((int)pA->b * pB->b, 255)
				);
				return 1;
			}
			pResult = CreateAndPush(L);
			pResult->Set(
				(int)::min((double)p->a * tFactor, 255.),
				(int)::min((double)p->r * tFactor, 255.),
				(int)::min((double)p->g * tFactor, 255.),
				(int)::min((double)p->b * tFactor, 255.)
			);
			return 1;
		}
		static int Meta_ToString(lua_State* L)LNOEXCEPT
		{
			fcyColor* p = static_cast<fcyColor*>(luaL_checkudata(L, 1, TYPENAME_COLOR));