自由运动物体的运动代码

//I/O口以及其他信号啥的
ARCHITECTURE ONE OF SPORTS IS
SIGNAL HCNT:STD_LOGIC_VECTOR(0 to 9);
SIGNAL VCNT:STD_LOGIC_VECTOR(0 to 9);
SIGNAL X1，Y1，X2,Y2，X3,Y3,X4,Y4:STD_LOGIC_VECTOR(0 to 9);
SIGNAL X_shudu,Y_shudu:STD_LOGIC_VECTOR(0 to 9);
SIGNAL X11，Y11，X21,Y21，X31,Y31,X41,Y41:STD_LOGIC_VECTOR(0 to 9);
--底部滑块位置初始化
X1<=20;Y1<=400;X2<=20;Y2<=460;
X3<=50;Y3<=400;X4<=50;Y4<=460;
--自由移动的那个滑块位置的初始化
X11<=255;Y11<=420;X21<=255;Y21<=430;
X31<=270;Y31<=420;X41<=270;Y41<=430;
X_shudu<=10;Y_shudu<=10;

ELSIF (Y1<HCNT AND HCNT<Y2  and X1<VCNT AND VCNT<X3)THEN --底部滑块的显示
    R <= '1';          
    G <= '1';
    B <= '0';   
  ELSIF (Y11<HCNT AND HCNT<Y21  and X11<VCNT AND VCNT<X31)THEN --自由移动的那个滑块的显示
    R <= '1';          
    G <= '1';
    B <= '0';

PROCESS(X11,Y11,X21,Y21,X31,Y31,X41,Y41) BEGIN
--自由物体移动方向右上的代码，水平和竖直方向的移动速度都是shudu个像素
X11<=X11+X_shudu；
Y11<=Y11+Y_shudu;
X21<=X21+X_shudu；
Y21<=Y21+Y_shudu;
X31<=X31+X_shudu；
Y31<=Y31+Y_shudu;
X41<=X41+X_shudu；
Y41<=Y41+Y_shudu;
IF(X31>640)THEN
X_shudu=!X_shudu；
X11<=X11+X_shudu；
Y11<=Y11+Y_shudu;
X21<=X21+X_shudu；
Y21<=Y21+Y_shudu;
X31<=X31+X_shudu；
Y31<=Y31+Y_shudu;
X41<=X41+X_shudu；
Y41<=Y41+Y_shudu;
END IF
IF(X11<0)THEN
X_shudu=!X_shudu；
X11<=X11+X_shudu；
Y11<=Y11+Y_shudu;
X21<=X21+X_shudu；
Y21<=Y21+Y_shudu;
X31<=X31+X_shudu；
Y31<=Y31+Y_shudu;
X41<=X41+X_shudu；
Y41<=Y41+Y_shudu;
END IF
IF(Y11<0)THEN
Y_shudu=!Y_shudu；
X11<=X11+X_shudu；
Y11<=Y11+Y_shudu;
X21<=X21+X_shudu；
Y21<=Y21+Y_shudu;
X31<=X31+X_shudu；
Y31<=Y31+Y_shudu;
X41<=X41+X_shudu；
Y41<=Y41+Y_shudu;
END IF
IF(Y11>480)THEN
Y_shudu=!Y_shudu；
X11<=X11+X_shudu；
Y11<=Y11+Y_shudu;
X21<=X21+X_shudu；
Y21<=Y21+Y_shudu;
X31<=X31+X_shudu；
Y31<=Y31+Y_shudu;
X41<=X41+X_shudu；
Y41<=Y41+Y_shudu;
END IF
END PROCESS；