I'm using the first person controller for my characters movement. On a left arrow keypress, I'd like the character to instantly rotate 90 degrees and keep moving forward. Currently, when I hit the arrow key, the character makes the sharp 90 degree turn, but the forward momentum the character previously had takes a second to wear off so the character ends up sliding in the direction he was previously moving a short bit.
The closest example I can think of to visually explain what I'm trying to do is how the character turns sharp in Temple Run. How my game is currently working, if I had the character on a ledge make a sharp left turn, he'd likely keep the original momentum and slide off the edge right after he turns.
Since my character is running on the x/z axis, I'm wondering if there would just be some way to maybe swap the directional velocity/momentum? The speed the character had on the x axis would instantly be switched to the z when it turns and the other would be set to zero. I'm obviously open to any solution that accomplishes what I'm looking for.
I dug into the CharacterMotor class in the first person controller, but have yet to find what part I can tweak to accomplish this.
I'd greatly appreciate any help.
Thank you.
You can try to stop the velocity of the Rigidbody before turning.
this.rigidbody.velocity = Vector3.zero;
this.rigidbody.angularVelocity = Vector3.zero;
If you want the object to continue like it did, you can try playing around with it by saving the current velocity in a variable, setting it to 0, rotate it and then putting back the old velocity (still forward).
If it works with global vectors (so from the point of view of the world, not the object), then you can try negativing the velocity, actually causing it to go 'backwards'. I can't test it for now but either way I think you need to set the velocity to zero first before turning the character.
Related
I'm trying to make a character that walks around a platform and if the character reach a corner, it rotates and continue walking on the side of the platform, same with the bottom part.
This is a visual representation of what I'm trying to achive.
Movement
The specific problem is when the character reach the corners, the rotation just go crazy. I'm trayng to achive this using a raycast from the character to the platform and if the raycast doesn't find floor, I start the rotation like this:
times++;
transform.rotation = Quaternion.Slerp(transform.rotation,Quaternion.AngleAxis(times*-89.9f,Vector3.forward),Time.deltaTime * RotationSpeed);
_characterGravity.SetGravityAngle(transform.localEulerAngles.z);
I'm using a characterGravity script that allows me to change the gravity direction for the character in order to not fall when is walking upside down or on the sides. But this is not working propperly. Is there a better way to do this?
Assuming your 2D view is aligned on the X-Y plane, with the Z-axis aimed into the screen (the same direction the camera is facing), I suggest using Transform.Rotate() instead of trying to linearly interpolate the rotation between two values:
if (ShouldRotateAroundCorner()) {
transform.Rotate(Vector3.forward, RotationSpeed * Time.deltaTime);
}
You'll just need to make sure your ShouldRotateAroundCorner() knows when to start and stop the 90 degree turn, which will take a little bit of additional code to keep track of when it's in this state change.
I have been using Unity for a while and still Im not sure about some things, I know there are like 5 different ways to move our character (not using prefabs like for 1st or 3rd person controller I mean just code from scratch) so far for moving a character on a terrain I think setting the speed of the rigidbody works overal for me, just setting the x and leaving the y component as what it was before assigning that, so that gravity effect is kept, overal it works, I manage to collide with wall and other objects, manage to go on terrain and could add jump later in same fashion, but the trouble I find is that my character flies when it steps over any small object like a stone on ground, if he goes over it he starts flying, not a big distance but definetly looks like walking on the moon maybe, also I see that if I have a bridge that is lower in the middle part of it (like U shape) well the character goes like flying from the begining almost until the middle or so, as said works like being on the moon, however gravity seems ok on other objects, I know I can change the gravity value to be higher but Im affraid I could be breaking all that so my question is, is there a better way to move a character on ground that will work better without changing the gravity value? I guess that it can work right without affecting this value, I used other method to change velocity and adding a certain value to the y component but again I see it not right as an apparent correct value for small stones and small objects makes it hard to go over slopes too, any help is greatly welcome =).
My main character moves by touching and holding him and then moving your finger left or right to move the character. To do this I just simply update the node's x position (walks left and right on a flat surface) in touchesMoved() with the x position of the touch location, and apply an animation depending on the direction he's moving.
I want to kind of take this to the next level and accomplish the same effect, but using physics, so that when I'm done moving him and release my finger, he may slide a little bit in the direction he was moving given the speed I was moving him at, if that makes sense. Does anyone know how I can accomplish this effect?
Would I have to do as I'm currently doing and update the position as it moves, but also apply a force/impulse at the same time? Kind of confused on how to approach this
Moving the physics body via force, impulse, or velocity will automatically update the player position.
So you will have to play around with the correct way to accomplish your goal. But based on this, what I would suggest is replace your .position code with .physicsBody!.velocity code in your touchesMoved. Then, on your touchesEnded, you can apply a bit of an impulse to give the player that little bit of an "on ice" effect to keep them going a tad.
You will need to experiment with how much velocity you want to get the character to move at the correct speed, and then you will need to play with the impulse figures as well to get it just right.
This could get a bit tricky though, in touchesMoved... because at some point you will want to reset the velocity to 0 (so they stop moving when your finger stops).
To do that, you will need to to use the .previousLocation from your touch object, and compare the distance of X moved. if the distance X moved is >0 (or some deadzone threshold) then apply the velocity; if the deltaX is 0, then set the velocity to 0.
This may actually be more complicated than just using .position to move the character, then having the character slide a bit with physics on touchesEnded.
You will have to play with it to get it right.
at the moment i'm working on a 2D plattformer and the work is going very well. But there is one Problem i can't get rid of.
The player can use a dash, which should move the player very fast in the direction he is looking. My problem is, that the player game object instant appears at the target location... like a teleport.
I'm using the AddForce Function to move the game object. On jumping i'm using AddForce as well and there it works really nice, i get a smooth jump movement.
The only different between dash and jump is that on jump i apply force to the y axis and on dash to the x axis. Changing the amount of force doesn't affect the movement only the distance.
Does anyone have an idea what i'm doing wrong?
// Dash
rigidbody2D.AddForce (new Vector2((dashSpeed * direction), 0));
// Jump
rigidbody2D.AddForce (new Vector2(0, jumpForce));
Best,
Verdemis :)
EDIT: I can not access my project at the moment, but i will try to show you what i have done.
Note: dashSpeed is a float value, at the moment something like 3500
and direction contains 1 or -1, depending on the direction the player is looking. The Dash code is part of the Update method.
// Dash
if(Input.GetKeyDown(dashKey))
rigidbody2D.AddForce (new Vector2((dashSpeed * direction), 0));
What is your direction vector, is it normalized? Since multiplying non-normalized vectors can be rather hazardous. Do you have more of the script to show?
EDIT: You should always do physics things in the FixedUpdate loop(link).
Ok i could solved the problem. My problem was that i only did this AddForce only once. The AddForce code was only executed in a single frame. I added a time which i count down to define how long the dash movement gonna be!
The problem may be that you are using a very big force, I was messing around with some physics today and realized that even a force of 100 almost looks instant. Try making a smaller force number to see if that helps you. I just tested making a smaller number and that does not work.
I am making a paper toss kind of game in Unity3d. I am implementing wind effect using constant force. I wanted to know how to make object fall in line with the target ie, if the object gets over the target, it should go in or fall in line with the target, not go behind or in front of the target. At present when I swipe applying a constant force, for different angles of swipe the distance moved by the object differs. Help would be much appreciated.
In FixedUpdate, use Physics.Raycast to check to see if the object is over the target. If so, set the x and z values of rigidbody.velocity to be zero (assuming y is the up/down axis in your game world) and disable the ConstantForce component (i.e. gameObject.GetComponent<ConstantForce>().enabled = false). Note that this won't be most realistic of movements, as it will seem like the object suddenly moves straight down when it goes over the target -- but it sounds like that's what you want.