Im having a problem making a sprite Jump on my XNA Game for Windows Phone when I touch the screen.
I have the following code at the moment.
foreach (TouchLocation tl in touchCollection)
{
if ((tl.State == TouchLocationState.Pressed))
{
rectangleSprite.Y -= 55;
}
}
NOTE:
rectangleSprite = new Rectangle((int)newPosition.X, (int)newPosition.Y, textureSprite.Width, textureSprite.Height)
MY code makes the sprite move to the new position. That works as a jump, but I want it to be more gradually, so you can see it jumping.
To make your character jump better you have to add velocity to your code, and put your jump function in the update() method.
You need to add gravity.
In your update you can add something like this.
float i = 1; velocity.Y += 0.15f * i;
Reminder: ^this only works if you set your code so, that you character can't go below the surface it stands on.
Because it will make it go down every time the code calls the update() method.
Then if you want, make a boolean, to check if you player has jumped.
foreach (TouchLocation tl in touchCollection)
{
if ((tl.State == TouchLocationState.Pressed && hasJumped == false))
{
position.Y -=10f;
veloctity.Y -= 5f;
}
}
EDIT:
Do not forget to update the position of your character.
The position:
Vector2 position;
the update code:
position = position + velocity;
Some things u might want to read/watch:
Like scheien said:
http://www.xnadevelopment.com/tutorials/thewizardjumping/thewizardjumping.shtml
Little video that maybe helps with explaining.
http://www.youtube.com/watch?v=ZLxIShw-7ac
I'm also on this site to learn so any suggestions or edits are welcome!
Related
Overview
I'm making an endless runner game. In this game, I have 5 lines, I want to player smoothly switch lines something like this Ref Link
In my case, I have everything the same but instead of a car, I have a player with PlayerController attached to it.
I'm changing the player line on Button click and also on IPointerDownHandler & IPointerUpHandler
Code
Full Code
[SerializeField] private List<Vector3> lines; // 5 lines in my case. Vector3 (0,0,0) and so on ...
private int flag;
Vector3 currLine;
private void ChangeLines ()
{
// Getting Inputs
if (Input.GetKey(KeyCode.LeftArrow)) { flag = -1; }
else if (Input.GetKey(KeyCode.RightArrow)) { flag = 1; }
else flag = 0;
if (flag > 0) MoveRight ();
else if (flag < 0) MoveLeft ();
}
//I used two approaches to moving but both are not working as indented
// 1 _ using DoTween
// 2 _ using Vector3.Lerp ()
private void MoveRight ()
{
// some input delay for Ipointers
if (inputDelay > 0) return;
if (currLine == lines [lines.Count - 1]) return; // can't move right anymore
transform.DoRotate (new Vector3(0, 45, 0) , 0.2f); // rotate player toward target
transform.DoMoveX (currLine.X, 0.3f) // 0.3f is coming from inspector
.SetEase (Ease.Linear) // i almost tried all Ease
.OnComplete ( ()=> DoTween.DoRotate (new Vector3(0, 0, 0) , 0.2f));
// using Lerp
LookAt (new Vector3 (currLine.x,Y,Z));
transform.position = Vector3.Lerp(transform.position, new Vector3(currLine.x, ..,..), lineChangeCurve
.Evaluate(Time.deltaTime * lineChangeSpeed));
}
private void MoveLeft ()
{
// same code as MoveRight
}
Problem
The code I wrote is prettier much working. the player is changing lines and also rotating towards the line but I'm unable to figure out what should i need to do to make this effect look like a reference.
Can you tell me how can I achieve the same smoother effect as the reference for my player?
Here is the link that I made so far
3D Assets link
Player lines distance :
new Vector3 (-8, 0,0)
new Vector3 (-4, 0,0)
new Vector3 (0, 0,0)
new Vector3 (4, 0,0)
new Vector3 (8, 0,0)
Thanks in Advance
You seem to be mixing two different animation techniques.
You do
transform.DoMoveX (currLine.X, 0.3f)
.SetEase (Ease.Linear)
...
which starts a tween animation
and then you also do Evaluate on the lerp which seems to be a bit redundant.
Your issue with the Lerp and Evaluate is
a) that you pass in
Time.deltaTime * lineChangeSpeed
which basically means
lineChangeSpeed / frame rate (e.g. 60)
=> This is a way to small value and will most probably basically mean you don't move at all (depending on your used curve)
You want to call this every frame and pass in a value increasing from 0 to 1 here (e.g. in a Coroutine)
b) you call it only exactly once. This will not result in any movement at all .. or at least only in a single step in the first frame => which probably causes a little "hiccup"
=> get rid of the lerp line all together. At best it interferes with the tween animation and is probably the cause of it looking somewhat off
To the question about keeping the button pressed.
You have nothing to prevent this in
private void ChangeLines ()
{
// Getting Inputs
if (Input.GetKey(KeyCode.LeftArrow)) { flag = -1; }
else if (Input.GetKey(KeyCode.RightArrow)) { flag = 1; }
else flag = 0;
if (flag > 0) MoveRight ();
else if (flag < 0) MoveLeft ();
}
First of all the flag seems quite redundant. And then you would
Either change to GetKeyDown so only the first frame where the button goes down is handled
Or add a flag that ignores all input while an animation is already running
Or even both (depending on your desired UX)
So e.g.
private bool alreadyAnimating;
private void ChangeLines ()
{
if(alreadyAnimating) return;
if (Input.GetKey(KeyCode.LeftArrow))
// Or as said maybe even better
if (Input.GetKeyDown(KeyCode.LeftArrow))
{
MoveLeft();
}
else if (Input.GetKey(KeyCode.RightArrow))
// same here
else if (Input.GetKeyDown(KeyCode.RightArrow))
{
MoveRight();
}
}
and then block and reset the flag when done with moving
alreadyAnimating = true;
transform.DoRotate (new Vector3(0, 45, 0) , 0.2f);
transform.DoMoveX (currLine.X, 0.3f)
.SetEase (Ease.Linear)
.OnComplete (()=>
{
DoTween.DoRotate (new Vector3(0, 0, 0) , 0.2f)
.OnComplete(() => { alreadyAnimating = false; })
});
I used Lerp() for these kind of conditions and it worked well all the time. As I saw your character correctly turns but it look like a snap turn. I couldn't spot an obvious error in your code. Play a little more with the rotation time and you will get your desired result. Sorry this must be a comment but dont have the reps.
The idea of the animation for switching lines is pretty simple. All you need is an animation of turning the main character to the side and back. Let's say the line change animation takes 1 second. Then you need that when moving to the left lane, the main character makes a turn to the left in 0.5 seconds and the next 0.5 seconds turns straight again. While the gameobject moves into the adjacent line, the main character will make a small smooth turn and the animation will look better. This is how it is done in the example you showed in the question. In your video, instead of this animation, the main character abruptly turns to a certain angle and returns to its original position abruptly back when it reaches the required line.
I'm starting to learn C# with Unity and I guess my code present some issues, the movement of my player works but not that good. Let me explain, I have a player at the bottom of the screen, moving only from left to right by itself, using transform.translate (I didn't used rigidbody) because on collision with the sides it stops, and is not a constant movement, the idea is that, once collides with the sides, it changes of direction, but same velocity.
The issue happens when the player colides with the walls (removed the mesh renderer to keep them transparent) but if at the same time you press the key to trigger also the change of direction the player gets stuck at the corner, as shown on this gif example:
Wait for the Player to get stuck at the corners, the gif takes like 15 secs.
And here's my actual Script for the Player
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class PMovement : MonoBehaviour
{
public float playerSpeed = 8.0f;
void Update()
{
float moveX = playerSpeed * Time.deltaTime;
transform.Translate(moveX, 0, 0);
if (Input.GetKeyUp(KeyCode.Space))
{
playerSpeed = playerSpeed * -1;
}
}
void OnCollisionEnter(Collision target)
{
if (target.gameObject.tag.Equals("SideWalls") == true)
{
playerSpeed = playerSpeed * -1;
}
}
}
Your code looks ok for what you want to achieve. Unfortunately, in Unity it may not be enough to pin point the problem, as the code heavily depends on the setting from the editor. One possible solution to this or similar problems:
If you still have blocking colliders, (The collision functions need some sort of rigidbody.), or if you clamp your player's position, to stop overflow, the following can happen:
Collider on right side is hit
Player direction change to left
Space is hit while colliders are still touching
Player direction change to right again
There is no collider on right side left to start the colliderEnter event again.
In this case block your space recognition while the player is touching one side.
If you change direction when you hit the wall, but you press Space at just the right time, you'd end up inside the wall a bit most likely. Then it'd keep thinking it was entering the wall collision and reversing direction over and over. Here's what I'd do.
public class PMovement : MonoBehaviour
{
private List<GameObject> Collisions = new List<GameObject>();
public float playerSpeed = 8.0f;
void Update()
{
float moveX = playerSpeed * Time.deltaTime;
transform.Translate(moveX, 0, 0);
if (Collisions.Count <= 0 && Input.GetKeyUp(KeyCode.Space))
{
playerSpeed = playerSpeed * -1;
}
}
void OnCollisionEnter(Collision target)
{
if (!Collisions.Contains(target.gameObject) && target.gameObject.tag.Equals("SideWalls") == true)
{
Collisions.Add(target.gameObject);
playerSpeed = playerSpeed * -1;
}
}
void OnCollisionExit(Collision target)
{
if (Collisions.Contains(target.gameObject)) {
Collisions.Remove(target.gameObject);
}
}
}
By keeping a list of wall objects you're inside, you can disallow the space bar if you're inside a wall. Keep in mind there's probably better ways to do the things you're doing, but this should fix the issue you're having for now.
I try to move my character but he moves through the border of the scene.
When I debug it sayscharTransform has 0 0 0 coords in Vector3.
Transform charTransform;
float leftHorizontalBound;
float rightHorizontalBound;
void Start()
{
charTransform = this.transform;
leftHorizontalBound = camera.ViewportToWorldPoint (new Vector3 (0,0, camera.nearClipPlane)).x;
rightHorizontalBound= camera.ViewportToWorldPoint (new Vector3 (1,0, camera.nearClipPlane)).x;
}
void Update()
{
if(charTransform.position.x <= leftHorizontalBound)
{
charTransform.position = new vector2(leftHorizontalBound + 0.1f);
return;
}
if(charTransform.position.x >= rightHorizontalBound)
{
charTransform.position = new vector2(rightHorizontalBound - 0.1f);
return;
}
//MAKE HERE YOUR MOVEMENT BASED ON INPUT.
}
i cant exactly say what is your problem and wish you assume your problem more accurate but i think you are working something like a boad game with a fixed camera and something like a ball always moves and you just want to keep that object in the scene.
in your code you defined a position by variables and made a position check for every frame. thats not what basically is done in unity and there will be problems. you can make an empty object and put in on the borders you want and check the position of that object with your moving object.
your next way is make an object and add a collider component to it. if your game is 3d add a collider and if its 2d game add a 2d collider and a collider to moving object and after that it never moves toward the borders but still there will be some limits so if it didnt work i think you should add a rigidBody to both of them.
I've been working on this script for the past day. For some reason my character will not jump as long as it's animator is active. I've got into the animation (there is only one) and removed all references to the animation placing a position anywhere and still the issue presides.
I have discovered that I can make my player jump if I use Co-routine which I'm using. However, I'm still new to using them and I can't work out why my player won't fall to the ground once a force has been added to it. And my player only moves up when the button is clicked. Could someone please take a look at my script and tell me what I'm doing wrong?
public float jumpSpeed = 100.0f;
public float jumpHeight = 2.0f;
public AudioClip jumpSound;
private GameObject pos;
private bool moving;
private bool isJumping;
void Start()
{
}
// Update is called once per frame
void Update ()
{
if(Input.GetMouseButtonDown(0))// && !moving)
{
isJumping = true;
StartCoroutine(JumpPlayer(gameObject.transform.localPosition));
}
else
{
isJumping = false;
}
}
IEnumerator JumpPlayer(Vector3 startPos)
{
Vector3 jump = new Vector3(transform.localPosition.x, jumpHeight, transform.localPosition.z);
float t = 0f;
t += Time.deltaTime / jumpSpeed;
rigidbody.AddForce(Vector3.up * jumpSpeed);
//gameObject.transform.localPosition = Vector3.Lerp(startPos, jump, 0.5f);
//isJumping = false;
yield return null;
}
Firstly, your use of coroutine isn't doing anything in particular - because it only does yield return null at the end, it'll run in a single frame and then exit. You could make it a regular void function and you shouldn't see any change in behaviour.
Removing other redundant code and you have just this:
if(Input.GetMouseButtonDown(0))
{
rigidbody.AddForce(Vector3.up * jumpSpeed);
}
This force is added for only a single frame: the frame where the mouse button is pressed down (if you used Input.GetMouseButton instead, you'd see the force applied for multiple frames).
You say "my player only moves up when the button is clicked" but I'm not clear why that's a problem - perhaps you mean that the player should continue to move up for as long as the button is held, in which case you should refer to my previous paragraph.
The most obvious reasons for the player not falling again are related to the RigidBody component: do you have weight & drag set to suitable values? An easy way to test this would be to position your player some distance from the ground at the start of the scene, and ensure that they fall to the ground when you start the scene.
Another reason might be that you're using the default override of .AddForce in an Update cycle. The default behaviour of this method applies force during the FixedUpdate calls, and you might find that using ForceMode.Impulse or ForceMode.VelocityChange gives you the result you're looking for.
I'm writing a 2D game and I'm trying to get moving platforms to work. After doing some previous investigation, I have it ALMOST working. The idea is to have 2 platform objects with colliders: 1 a visible object, the other an invisible object with isTrigger set (since the player would just go through a trigger). The code for the Moving Platform child (the trigger one) is set here.
using UnityEngine;
using System.Collections;
public class MovingPlatformChild : MonoBehaviour
{
public string parentPlatform = "";
void Start ()
{
transform.parent = GameObject.Find(parentPlatform).transform;
}
// Update is called once per frame
void Update ()
{
}
void OnTriggerEnter(Collider playerObject)
{
Debug.Log ("enter moving platform");
if(playerObject.gameObject.name.Contains("Player"))
{
playerObject.transform.parent = gameObject.transform;
}
}
int i = 0;
void OnTriggerStay(Collider playerObject)
{
Debug.Log ("stay" + i++);
if(playerObject.transform.position.y >= transform.position.y)
{
playerObject.transform.parent = gameObject.transform;
}
else
{
playerObject.transform.parent=null;
}
}
void OnTriggerExit(Collider playerObject)
{
Debug.Log ("EXIT");
if(playerObject.gameObject.name.Contains("Player"))
{
playerObject.transform.parent=null;
}
}
}
The Start() function just makes it a child of the visible platform. This can probably be done right in the Unity editor as well, instead of through code.
The OnTriggerEnter function adds the player object as a child of the trigger platform object, which is a child of the visible platform. So they should all move together.
The OnTriggerStay is an attempt to verify that this remains true only while the player is on the top of the platform. While the player is within the trigger, if the player is on top of the platform, then it remains attached. Otherwise, it's not. This is so that nothing happens on the bottom end.
The OnTriggerExit function just removes the player object as a child when it exits the trigger.
This is somewhat working (but we know somewhat isn't good enough). It works sometimes, but the player will be very jittery. Also, on the way down while standing atop the platform, the TriggerStay function doesn't appear to be called (implying the player is no longer within the trigger). This is observed through my Debug "stay" statement. Finally, sometimes the player will also fall straight through the platform.
What in this code would allow the player to fall through the platform, or be so jittery on the way up? Am I missing something crucial? If you need any more code, please let me know.
Below is the code for the movement of the non-trigger platform (the parent of the trigger platform and in an identical position). I will also share the Player's Update function after that.
void Start ()
{
origY = transform.position.y;
useSpeed = -directionSpeed;
}
// Update is called once per frame
void Update ()
{
if(origY - transform.position.y > distance)
{
useSpeed = directionSpeed; //flip direction
}
else if(origY - transform.position.y < -distance)
{
useSpeed = -directionSpeed; //flip direction
}
transform.Translate(0,useSpeed*Time.deltaTime,0);
}
And now the player code:
void Update()
{
CharacterController controller = GetComponent<CharacterController>();
float rotation = Input.GetAxis("Horizontal");
if(controller.isGrounded)
{
moveDirection.Set(rotation, 0, 0); //moveDirection = new Vector3(rotation, 0, 0);
moveDirection = transform.TransformDirection(moveDirection);
//running code
if(Input.GetKey(KeyCode.LeftShift) || Input.GetKey(KeyCode.RightShift)) //check if shift is held
{ running = true; }
else
{ running = false; }
moveDirection *= running ? runningSpeed : walkingSpeed; //set speed
//jump code
if(Input.GetButtonDown("Jump"))
{
//moveDirection.y = jumpHeight;
jump ();
}
}
moveDirection.y -= gravity * Time.deltaTime;
controller.Move(moveDirection * Time.deltaTime);
}
EDIT: I've added the specifications for the platforms and player in this imgur album:
http://imgur.com/a/IxgyS
This largely depends on the height of your trigger box, but it's worth looking into. Within your TriggerStay, you've got an IF statement concerning the player y coordinates. If the trigger box is fairly large and the platform's speed fast enough, on the way up and between update ticks the player Y coords could momentarily be smaller than the trigger Y coords. This would lead to him losing the parentage, only to regain it a few ticks later. This might be the cause of the 'jittering'.
The problem I was having included
The moving platform was written using Translate. I rewrote it using a rigidbody and the rigidbody.Move function. This didn't immediately help, but...
I realized the CharacterMotor script (Unity provides this) that I had attached to the player included moving platform support. I set the MovementTransfer value to PermaLocked, and also unchecked the "Use FixedUpdate" box on the script, and it now works 99% of the time. I've had one time where I did a particular behaviour and slipped through, but I can't recreate it.
Hope this helps anyone who might be looking for an answer!