Super strange rotation bug

Questions & Answers
1

Well,i have i script that places blocks and removes them. It has also an option to rotate desired cube.But when i try to rotate it 90 degrees it goes 179.xxxxxx .

Here is my script:

var placeLayer : LayerMask = 1;
var deleteLayer : LayerMask = 1;
private var range : float = Mathf.Infinity;
private var hit : RaycastHit;
private var hitt : RaycastHit;
var cubes : Transform[];
private var selectedCube : int = 0;
var playCloth : AudioClip[];
var playGrass : AudioClip[];
var playGravel : AudioClip[];
var playSand : AudioClip[];
var playSnow : AudioClip[];
var playStone : AudioClip[];
var playWood : AudioClip[];
var currBlock : String = "";
var positionCube : Rect;
var positionCubeGUI : Rect;
var textures : Texture2D[];
var parentt : Transform;
var placeBlockGUI : Texture2D;
var rot : int = 0;

function Update () {
	positionCubeGUI = Rect(0, (Screen.height-130), 210, 130);
	positionCube = Rect(12.5, (Screen.height-115), 100, 100);
	Screen.lockCursor = true;
    if (Input.GetMouseButtonDown(0))
        Build();
        
    if (Input.GetMouseButtonDown(1))
        Erase();
        
    if (Input.GetKeyDown(KeyCode.R)){
    if (HitBlock()) {
    	
    	hit.collider.transform.rotation.y += 1;
    	
    }
    }
    
    SelectBlock();
    
}

function Build() {
    if (HitBlock()) {
        var cube = Instantiate(cubes[selectedCube],hit.transform.position + hit.normal,Quaternion.identity);
        currBlock = cube.name;
        playSoundToCubesName();
    }
}

function Erase() {
    if (HitBlockin())
    switch(hitt.transform.name){
    case "cubeStone(Clone)":
	playRandomBlockSound(5);
	break;
	
case "cubeCobblestone(Clone)":
	playRandomBlockSound(5);
	break;
	
case "cubeDirt(Clone)":
	playRandomBlockSound(1);
	break;
	
case "cubeGrass(Clone)":
	playRandomBlockSound(1);
	break;
	
case "cubeDiamond(Clone)":
	playRandomBlockSound(5);
	break;
	
case "cubeGold(Clone)":
	playRandomBlockSound(5);
	break;
	
case "cubeIron(Clone)":
	playRandomBlockSound(5);
	break;
	
case "cubePlank(Clone)":
	playRandomBlockSound(6);
	break;
	
case "cubeGlass(Clone)":
	playRandomBlockSound(5);
	break;
/////////////////////////////////
case "cubeWoolBlack(Clone)":
	playRandomBlockSound(0);
	break;
	
case "cubeWoolBlue(Clone)":
	playRandomBlockSound(0);
	break;
	
case "cubeWoolBrown(Clone)":
	playRandomBlockSound(0);
	break;
	
case "cubeWoolDarkGreen(Clone)":
	playRandomBlockSound(0);
	break;
	
case "cubeWoolDarkPink(Clone)":
	playRandomBlockSound(0);
	break;
	
case "cubeWoolGreen(Clone)":
	playRandomBlockSound(0);
	break;
	
case "cubeWoolLightBlue(Clone)":
	playRandomBlockSound(0);
	break;
	
case "cubeWoolLightGrey(Clone)":
	playRandomBlockSound(0);
	break;
	
case "cubeWoolOceanBlue(Clone)":
	playRandomBlockSound(0);
	break;
	
case "cubeWoolOrange(Clone)":
	playRandomBlockSound(0);
	break;
	
case "cubeWoolPink(Clone)":
	playRandomBlockSound(0);
	break;
	
case "cubeWoolPurple(Clone)":
	playRandomBlockSound(0);
	break;
	
case "cubeWoolRed(Clone)":
	playRandomBlockSound(0);
	break;
	
case "cubeWoolYellow(Clone)":
	playRandomBlockSound(0);
	break;	
    	
    }
        Destroy(hitt.transform.gameObject);
}



function SelectBlock(){
if(Input.GetKeyUp(KeyCode.Keypad1)) selectedCube--;
if(Input.GetKeyUp(KeyCode.Keypad2)) selectedCube++;
if(selectedCube == cubes.length){
	selectedCube = 0;
}
if(selectedCube < 0){
	selectedCube = cubes.length-1;
}

}

function playSoundToCubesName(){

switch(currBlock){

case "cubeStone(Clone)":
	playRandomBlockSound(5);
	break;
	
case "cubeCobblestone(Clone)":
	playRandomBlockSound(5);
	break;
	
case "cubeDirt(Clone)":
	playRandomBlockSound(1);
	break;
	
case "cubeGrass(Clone)":
	playRandomBlockSound(1);
	break;
	
case "cubeDiamond(Clone)":
	playRandomBlockSound(5);
	break;
	
case "cubeGold(Clone)":
	playRandomBlockSound(5);
	break;
	
case "cubeIron(Clone)":
	playRandomBlockSound(5);
	break;
	
case "cubePlank(Clone)":
	playRandomBlockSound(6);
	break;
	
case "cubeGlass(Clone)":
	playRandomBlockSound(5);
	break;
/////////////////////////////////
case "cubeWoolBlack(Clone)":
	playRandomBlockSound(0);
	break;
	
case "cubeWoolBlue(Clone)":
	playRandomBlockSound(0);
	break;
	
case "cubeWoolBrown(Clone)":
	playRandomBlockSound(0);
	break;
	
case "cubeWoolDarkGreen(Clone)":
	playRandomBlockSound(0);
	break;
	
case "cubeWoolDarkPink(Clone)":
	playRandomBlockSound(0);
	break;
	
case "cubeWoolGreen(Clone)":
	playRandomBlockSound(0);
	break;
	
case "cubeWoolLightBlue(Clone)":
	playRandomBlockSound(0);
	break;
	
case "cubeWoolLightGrey(Clone)":
	playRandomBlockSound(0);
	break;
	
case "cubeWoolOceanBlue(Clone)":
	playRandomBlockSound(0);
	break;
	
case "cubeWoolOrange(Clone)":
	playRandomBlockSound(0);
	break;
	
case "cubeWoolPink(Clone)":
	playRandomBlockSound(0);
	break;
	
case "cubeWoolPurple(Clone)":
	playRandomBlockSound(0);
	break;
	
case "cubeWoolRed(Clone)":
	playRandomBlockSound(0);
	break;
	
case "cubeWoolYellow(Clone)":
	playRandomBlockSound(0);
	break;
	
}	
}

function OnGUI()
{
    GUI.DrawTexture(positionCubeGUI,placeBlockGUI);
	GUI.DrawTexture(positionCube, textures[selectedCube]);
}

function playRandomBlockSound(block : int){
var wichOne : int = Random.Range(0, 3);

if(block == 0) AudioSource.PlayClipAtPoint(playCloth[wichOne],transform.position);

if(block == 1) AudioSource.PlayClipAtPoint(playGrass[wichOne],transform.position);

if(block == 2) AudioSource.PlayClipAtPoint(playGravel[wichOne],transform.position);

if(block == 3) AudioSource.PlayClipAtPoint(playSand[wichOne],transform.position);

if(block == 4) AudioSource.PlayClipAtPoint(playSnow[wichOne],transform.position);

if(block == 5) AudioSource.PlayClipAtPoint(playStone[wichOne],transform.position);

if(block == 6) AudioSource.PlayClipAtPoint(playWood[wichOne],transform.position);

}
















function HitBlock() : boolean {
    return Physics.Raycast(transform.position, transform.forward, hit, range, placeLayer);
}

function HitBlockin() : boolean {
    return Physics.Raycast(transform.position, transform.forward, hitt, range, deleteLayer);
}
2

You are modifying the rotation directly:

hit.collider.transform.rotation.y += 1;

the rotation is a Quaternion - modifying its components directly will not give the results you expect. If you want to add some rotation around the Y axis (90 degrees, for instance), use Rotate:

hit.transform.Rotate(0,90,0);

By the way, you don’t need to write hit.collider.transform because RaycastHit informs the transform of the hit object too - just write hit.transform ; it maybe a little more efficient.