unity3d - How can I make my character move only forward in Unity? -

i have character in unity use move script, transform position.x, y, or z everytime when press appropriate button. change code rotate character when user press "a" or "d" , don't move it, if user press "w" button move forward. have looked on internet, , found out need use vector3.forward somehow, doesn't work.

here script:

this script moves character: (it attached player object contains moveable characters)

public class move : monobehaviour { float lerptime; float currentlerptime; float perc = 1;  vector3 startpos; vector3 endpos;  bool firstinput; public bool justjump;  // update called once per frame void update () {     if (input.getbuttondown("up") || input.getbuttondown("down") || input.getbuttondown("left") || input.getbuttondown("right")) {         if (perc == 1) {             lerptime = 1;             currentlerptime = 0;             firstinput = true;             justjump = true;         }     }     startpos = gameobject.transform.position;      if (input.getbuttondown("right") && gameobject.transform.position == endpos) {         endpos = new vector3(transform.position.x + 0.5f, transform.position.y, transform.position.z);     }     if (input.getbuttondown("left") && gameobject.transform.position == endpos) {         endpos = new vector3(transform.position.x - 0.5f, transform.position.y, transform.position.z);     }     if (input.getbuttondown("up") && gameobject.transform.position == endpos) {         endpos = new vector3(transform.position.x, transform.position.y, transform.position.z + 0.5f);     }     if (input.getbuttondown("down") && gameobject.transform.position == endpos) {         endpos = new vector3(transform.position.x, transform.position.y, transform.position.z - 0.5f);     }      if (firstinput == true) {         currentlerptime += time.deltatime * 5;         perc = currentlerptime / lerptime;         gameobject.transform.position = vector3.lerp(startpos, endpos, perc);         if (perc > 0.8f)  {             perc = 1;         }          if (mathf.round(perc) == 1) {             justjump = false;         }     } }  } 

and here "rotate script", attached moveable character(s) itself:

public class animationcontroller : monobehaviour {      animator anim;     public gameobject theplayer;      // use initialization     void start () {         anim = gameobject.getcomponent<animator>();     }      // update called once per frame     void update () {         move movescript = theplayer.getcomponent<move>();         if (movescript.justjump == true) {             anim.setbool("jump", true);         }         else {             anim.setbool("jump", false);         }          if (input.getbuttondown("right")) {             gameobject.transform.rotation = quaternion.euler(0, 90, 0);         }         if (input.getbuttondown("left")) {             gameobject.transform.rotation = quaternion.euler(0, -90, 0);         }         if (input.getbuttondown("up")) {             gameobject.transform.rotation = quaternion.euler(0, 0, 0);         }         if (input.getbuttondown("down")) {             gameobject.transform.rotation = quaternion.euler(0, 180, 0);         }     } } 

could give me please on this? (preferably code, if can :) )

assuming want character move facing, , trying not lot of changes code, done:

first, attach both script directly movable character.

then, change move script to:

public class move : monobehaviour { float lerptime; float currentlerptime; float perc = 1;  vector3 startpos; vector3 endpos;  bool firstinput; public bool justjump;  // update called once per frame void update () {     if (input.getbuttondown("up") || input.getbuttondown("down") || input.getbuttondown("left") || input.getbuttondown("right")) {         if (perc == 1) {             lerptime = 1;             currentlerptime = 0;             firstinput = true;             justjump = true;         }     }     startpos = gameobject.transform.position;      if (input.getbuttondown("up") && gameobject.transform.position == endpos) {         endpos = transform.position + gameobject.transform.rotation * (new vector3(0, 0, 0.5f));     }     if (input.getbuttondown("down") && gameobject.transform.position == endpos) {         endpos = transform.position + gameobject.transform.rotation * (new vector3(0, 0, 0.5f));     }      if (firstinput == true) {         currentlerptime += time.deltatime * 5;         perc = currentlerptime / lerptime;         gameobject.transform.position = vector3.lerp(startpos, endpos, perc);         if (perc > 0.8f)  {             perc = 1;         }          if (mathf.round(perc) == 1) {             justjump = false;         }     } }  } 

and animationcontroller script to

public class animationcontroller : monobehaviour {      animator anim;     public gameobject theplayer;      // use initialization     void start () {         anim = gameobject.getcomponent<animator>();     }      // update called once per frame     void update () {         move movescript = theplayer.getcomponent<move>();         if (movescript.justjump == true) {             anim.setbool("jump", true);         }         else {             anim.setbool("jump", false);         }          if (input.getbuttondown("right")) {             gameobject.transform.rotation = gameobject.transform.rotation * quaternion.euler(0, 90, 0);         }         if (input.getbuttondown("left")) {             gameobject.transform.rotation = gameobject.transform.rotation * quaternion.euler(0, 90, 0);         }     } } 

this make character rotate when press left , right buttons, , move when press , down button. althought solves problem, not best way write scripts character movement.

i recommend read more state machine design patter. book robert nystrom has chapter , easy read. also, free read online :)