Numerical Comparison Logic

Question

What I am trying to do is write some code that can do t$$anonymous$$s automatically and handle every possible conditions. How can I go about doing t$$anonymous$$s without writing t$$anonymous$$s code for every possible result.

 if(up == 1 && down == 1 && right == 0 && left == 0){
 
     randomizer = Random.Range(0,2);
     if(randomizer == 1){
         direction = 1;
     }else
         direction = 4;
 }
  
 if(up == 0 && down == 1 && right == 1 && left == 0){
  
     randomizer = Random.Range(0,2);
     if(randomizer == 1){     
         direction = 4;
     }else
         direction = 3;
 }
  
 if(up == 0 && down == 0 && right == 1 && left == 1){
  
     randomizer = Random.Range(0,2);
     if(randomizer == 1){
         direction = 2;
     }else
         direction = 3;
 }
  
 if(up == 0 && down == 1 && right == 0 && left == 1){
  
     randomizer = Random.Range(0,2);
     if(randomizer == 1){
         direction = 4;
     }else    
         direction = 2;
  
 }

Answer 1

Best Answer

Answer by Piflik · Jul 19, 2012 at 09:43 PM

Make the four raycasts, if they don't $$anonymous$$t, you store that direction in an array and increase a variable by one. After the four raycasts you chose randomly one of the entries in the array.

Pseudocode:

 private var directions : int = new int[4];
 
 function chooseDirection() {
 
     var dirNmbr : int = 0;
 
     for(var i = 0; i < 4; i++) {
         //raycast in direction i
         if(!raycast.$$anonymous$$t) {
             directions[dirNmbr] = raycast;
             dirNmbr++;
         }
     }
 
     if(dirNmbr > 0) {
         direction = directions[Random.Range(0, dirNmbr)]
     }
 }

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Answer 2

Assuming you want a random direction:

var moveToNextSpot = false;

function ChooseDirection(){

 var randomDir = Random.Range(1,4);
 
 if(randomDir == 1)
 {
     if (!Physics.Raycast (transform.position, (Vector3.up), awareness)) 
     moveDir = Vector3.forward;   
 }
 
 if(randomDir == 2)
 {
     if (!Physics.Raycast (transform.position, (Vector3.right), awareness)) 
     moveDir = Vector3.right;    
 }
 
 if(randomDir == 3)
 {
     if (!Physics.Raycast (transform.position, (-Vector3.right), awareness)) 
     moveDir = -Vector3.right;    
 }
 
 if(randomDir == 4)
 {
     if (!Physics.Raycast (transform.position, (Vector3.up), awareness)) 
     moveDir = -Vector3.up;    
 }
 moveToNextSpot = true;

}

 function Start (){
 ChooseDirection();
 }
 
 function Update(){
     if(moveToNextSpot)
     transform.Translate((moveDir) * Time.deltaTime);
     else
     ChooseDirection();
 }

then you need to decide when the object has reached it's next point to check direction again, and turn the boolean back to false...

EDIT: updated code for relevance

Numerical Comparison Logic

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