koobas.hobune.stream
How can I Vector3 Slerp or Lerp locally?
Hello, I'm using:
if(forwardMoveSpeed > 0){
this.transform.localPosition = Vector3.Lerp(this.transform.position , new Vector3(this.transform.position.x + 1f,this.transform.position.y, this.transform.position.z), forwardMoveSpeed * Time.deltaTime);
forwardMoveSpeed -= 0.05f;
}
to move my character for a small amount of time. But this moves it in the global x position. As soon as my character rotates it doesn't look right, obviously.
How can I move my character in it's local x position.
Thanks.
I did some searches and found a bunch on how to rotate something locally/globally but nothing about just moving using Vector3.
EDIT:
So let me explain a tad bit more so you can get a better understanding.
I have a character(GameObject). He runs a path and has a specific amount of life. When he dies I want him to fall "forward" while doing his dying animation.
He faces the Z axis, therefore "forward" is his LOCAL Z axis. The path he travels has 90 degree turns. So he faces different directions relative to the global axis. Sometimes his LOCAL z axis is facing the GLOBAL x axis, sometimes the GLOBAL y Axis.
With that being said all I want to do is move his overall position's LOCAL z axis by like 2 units while he's doing his animation. (so if his position is 0,0,0 then when he dies I want his LOCAL position to be 0,0,2. I can't just change his position because his LOCAL Z axis might be the GLOBALS X axis).
How do I do that?
Eveything I try moves him 2 units in a GLOBAL axis.
Ok so I couldn't find a solution so I just made my own personal converter. This code is pretty specific to my model but if your "forward" is your local Z axis then it might work for you.
Thanks to everyone who tried to help, maybe I didn't explain it good enough.
if(forwardMoveSpeed > 0){
/*@@@@LEGEND
*In a perfect world, if all rotations were EXACT then this is what way the character is facing
*
*
* If it's y rotation is 90 degrees: He is facing X direction and forward is +x
*
* If it's y rotation is 0 degrees: He is facing Z direction and forward is +Z
*
* If it's y rotation is 180 degrees: He is facing Z direction and forward is -z
*
* If it's y rotation is 270 degrees: He is facing X direciont and forward is -x
*
*/
currentPosition = this.transform.position;
float moveAmount = 2f;
if(oneShot){
float currentRotitation = this.transform.rotation.eulerAngles.y;
//ALL VALUES ARE A RANGE/ABOUT BECAUSE WE CAN'T GAURENTEE THE CHARACTER'S ROTATION WILL BE EXACTLY 0,90,180, OR 270
//if rotoation is greater then 20 then it CANT be "0" rotation
if(currentRotitation > 20){
//if rotation is greater then 110 then it CANT be "90" rotation
if(currentRotitation > 110){
//if rotation is greater then 200 then it CANT be "180" rotation
if(currentRotitation > 200){
//if we are greater then 200 we have to be at "270" degrees
//forward is negative x
nextPosition = new Vector3(currentPosition.x - moveAmount, currentPosition.y, currentPosition.z);
}
//if it's less then 200 then it has to be "180" degrees
else{
//forward is negative z
nextPosition = new Vector3(currentPosition.x, currentPosition.y, currentPosition.z - moveAmount);
}
}
//if it's less then 110 it has to be "90" rotation
else{
//forward is positive x
nextPosition = new Vector3(currentPosition.x + moveAmount, currentPosition.y, currentPosition.z);
}
}
//if it's less then 20 it must be "0" rotation
else{
//forward is positive Z
nextPosition = new Vector3(currentPosition.x, currentPosition.y, currentPosition.z + moveAmount);
}
//this is so we only figure out our "end" location once.
oneShot = false;
}
this.transform.position = Vector3.Slerp(currentPosition , nextPosition, forwardMoveSpeed * Time.deltaTime);
forwardMoveSpeed -= 0.05f;
}
If you are moving in the forward direction of your object, and if you are facing the direction you want to go, then you can boil your code down to this:
if(forward$$anonymous$$oveSpeed > 0){
currentPosition = this.transform.position;
float moveAmount = 2f;
if(oneShot){
nextPosition = transform.forward * moveAmount;
oneShot = false;
}
this.transform.position = Vector3.Lerp(currentPosition , nextPosition, forward$$anonymous$$oveSpeed * Time.deltaTime);
forward$$anonymous$$oveSpeed -= 0.05f;
}
You want Lerp, not Slerp. Slerp is for spherical movement of vectors.
Actually you can get rid of your forward$$anonymous$$oveSpeed and use a constant speed (and still get an eased movement):
if(transform.position != nextPosition){
currentPosition = this.transform.position;
float moveAmount = 2f;
if(oneShot){
nextPosition = transform.forward * moveAmount;
oneShot = false;
}
this.transform.position = Vector3.Lerp(transform.position , nextPosition, speed * Time.deltaTime);
}
if you want to move the character in local-space, shouldn't you be using Lerp on the transform.localposition and not transform.position? Try this instead
if(forwardMoveSpeed > 0){
this.transform.localPosition = Vector3.Lerp(this.transform.localposition , new Vector3(this.transform.localposition.x + 1f,this.transform.localposition.y, this.transform.localposition.z), forwardMoveSpeed * Time.deltaTime);
forwardMoveSpeed -= 0.05f;
}
I tried something similar while waiting for a response, and it did nothing. So I went to the docks and it makes sense why it doesn't work.
"Position of the transform relative to the parent transform." $$anonymous$$y script is on the parent so it just returns the same as transform.Position. Thanks though.
I'm not sure exactly what you to happen here. Typically you would have something like this:
var v3LocalDest : Vector3;
var speed = 2.0;
function Start() {
v3LocalDest = transform.localPosition;
v3LocalDest.x += 1.0;
}
function Update() {
transform.localPosition = Vector3.Lerp(transform.localPosition, v3LocalDest, Time.deltaTime * speed);
}
Note if you have a global position and want to set v3LocalDest, you can do:
var v3LocalDest = transform.InverseTransformPoint(v3GlobalPoint);
I've tried a few different ways using InverseTransformPoint and using TransformPoint, it all gives me weird cords. Same with TransformDirection
Based on your comment above, if this is on a parent object, replace all 'localPosition' with 'position' in this sample code.
Yes you are correct, I can use both localPosition or position sense they will return the same thing.
With that being said it does exactly what I already have accomplished. $$anonymous$$oves the GameObject in the global position. I'm looking for local, thanks though.
