列表需要一些基础知识

Question

您好我有这些向量：

Vector2 ground1p1 = new Vector2(0,430); 
    Vector2 ground1p2 = new Vector2(200,430); 
    Vector2 ground1p3 = new Vector2(0, 290); 
    Vector2 ground1p4 = new Vector2(280, 340); 

我想将它们放在一个列表，这样，而不是这样：

if (DetectPlayerAndGround1Collision2(playerPosition,ground1p1,player,ground1) == true) 
      { 
       hasJumped = false; 
       velocity.Y = 0f; 
      } 
      if (DetectPlayerAndGround1Collision2(playerPosition, ground1p2, player, ground1) == true) 
      { 
       hasJumped = false; 
       velocity.Y = 0f; 
      } 

这里当我在写作结束时写入“矢量”时，问题没有发生，就像我没有声明的那样：

public class Game1 : Microsoft.Xna.Framework.Game 
    { 

     GraphicsDeviceManager graphics; 
     SpriteBatch spriteBatch; 




     public Game1() 
     { 
      graphics = new GraphicsDeviceManager(this); 
      Content.RootDirectory = "Content"; 
     } 


     protected override void Initialize() 
     { 

      base.Initialize(); 
     } 


     bool hasJumped = true; 


     Vector2 velocity; 
     Texture2D player; 
     Texture2D ground1; 
     List<Vector2> vectors = new List<Vector2>(); 


     Vector2 playerPosition = new Vector2(30, 300); 
     Vector2 ground1p1 = new Vector2(0,430); 
     Vector2 ground1p2 = new Vector2(200,430); 
     Vector2 ground1p3 = new Vector2(0, 290); 
     Vector2 ground1p4 = new Vector2(280, 340); 

Answer 1

你可以使用一个列表（如你所说）

List<Vector2> vectors = new List<Vector2>(); 

vectors.Add(ground1p1); 
vectors.Add(ground1p2); 
vectors.Add(ground1p3); 
vectors.Add(ground1p4); 

foreach (Vector2 vec2 in vectors) 
{ 
    if (DetectPlayerAndGround1Collision2(playerPosition, vec2, player, ground1)) 
    { 
     hasJumped = false; 
     velocity.Y = 0f;   

     // maybe add a break to prevent superfluous calls 
     break; 
    } 
}