python - 我的球/蝙蝠碰撞和反射有什麼問題？

Question

我寫了一個突破風格的遊戲，它除了球蝙蝠的碰撞和反射之外都起作用。它應該使工作如果球從左向右移動，因爲它擊中了蝙蝠：

如果它擊中左端它反彈回它 來的方向，如果它擊中它反彈的右端在相同的方向

，反之亦然從右到左的方向。並且：

如果它碰到中間區域，它會以相同的角度反彈回來，如果它碰到中心左/右區域，它會在角度發生輕微變化時反彈回去。

它有時也會通過蝙蝠，即使它結束了，應該是反彈，這是令人困惑的，但我認爲可能是由於`BH == Bat.y線，因爲球正在移動角度等都可能略微超過，並繼續進行。

代碼：（BAW/H =蝙蝠寬/高，BW/H =球寬/高）

# check with bat 

if theball.y+BH == thebat.y and (theball.x >= thebat.x-5 and theball.x <= thebat.x+BATW): 

# collision in centre - rebounds with angle reflection == angle incidence 

    if theball.cx>= thebat.x+40 and theball.cx<=thebat.x+60: 
     theball.dy = -theball.dy 
     return 

    # else find ball direction, do all areas for each direction 

    if theball.oldx < theball.x: # ball moving left to right, find which area: ends, mid lef, mid right, centre 

     # collision with left end 

     if theball.cx<= thebat.x+10: 

     # ball rebounds back in direction it came from 

      theball.dx = - theball.dx 
      theball.dy = - theball.dy 
      return 

     # collision with right end 

     if theball.cx >= thebat.x+90: 

      angle -= 10 
      if angle < MIN_ANGLE: 
       angle = MIN_ANGLE 

      theball.dx, theball.dy = calc_dxdy(angle) 
      return 

     # middle left and right 

     # mid left 

     if (theball.cx > thebat.x+10 and theball.cx < thebat.x+40): 

      angle -=5 
      if angle <= MIN_ANGLE: 
       angle = MIN_ANGLE 
       theball.dx, theball.dy = calc_dxdy(angle) 
       return 

     # mid right 

     if (theball.cx > thebat.x+60 and theball.cx < thebat.x+90): 

      angle +=5 
      if angle >= MAX_ANGLE: 
       angle = MAX_ANGLE 
       theball.dx, theball.dy = calc_dxdy(angle) 
       return 

    # ball moving right to left 

    if theball.oldx > theball.x: # ball moving right to left, find which area: ends, mid lef, mid right, centre 

     # collision with right end 

     if theball.cx>= thebat.x+90: 

     # ball rebounds back in direction it came from 

      theball.dx = - theball.dx 
      theball.dy = - theball.dy 
      return 

     # collision with right end 

     if theball.cx <= thebat.x+10: 

      angle += 10 
      if angle > MAX_ANGLE: 
       angle = MAX_ANGLE 

      theball.dx, theball.dy = calc_dxdy(angle) 
      return 

     # middle left and right 

     # mid left 

     if (theball.cx > thebat.x+10 and theball.cx < thebat.x+40): 

      angle +=5 
      if angle <= MAX_ANGLE: 
       angle = MAX_ANGLE 
       theball.dx, theball.dy = calc_dxdy(angle) 
       return 

     # mid right 

     if (theball.cx > thebat.x+60 and theball.cx < thebat.x+90): 

      angle -=5 
      if angle >= MIN_ANGLE: 
       angle = MIN_ANGLE 
       theball.dx, theball.dy = calc_dxdy(angle) 
       return 

Answer 1

你說得對，這是因爲

theball.y+BH == thebat.y 

在角度，球不太可能在正確的高度。 嘗試改爲添加一些不確定性。例如：

UNCERTAINTY = 10 
if theball.y+BH - UNCERTAINTY <= thebat.y <= theball.y+BH + UNCERTAINTY and ...