xna防止下山斜坡或山坡太陡

Question

我該如何防止下坡或山坡上的高度地形太陡峭？ 我有一臺在地形上移動的三維攝像機，即使在大斜坡和山坡上也可以在任何地方移動，我該怎麼辦？

Answer 1

我會避免上升/運行計算，因爲如果地形是垂直的，他們可以產生NaN。

//currentPosition & targetPosition should be known to you 

Vector3 potentialMove = Vector3.Normalize(targetPosition - currentPosition); 

float steepness = Vector3.Dot(Vector3.Up, potentialMove); 
if(steepness < 0.85f && steepness > -0.85f) // set to taste. 1 is vertically up, 0 is flat, -1 is vert down 
{ 
    //allow move 
    currentPosition = targetPosition 
} 

Answer 2

你應該預測你要去的地方，如果你試圖在一個方向移動，然後計算出落得如果您當前的點和你的未來點之間的slope太陡：

if(forward key pressed) { 
    get location I'll end up at 
    get the Z of that location 
    calculate slope using rise/run formula 
    if(slope is too steep) { 
     don't move 
    } 
    else { move to the future location } 
}