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coyote time

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master
Jordan Orelli 5 years ago
parent c0513e07e2
commit 1acf3cd3e2
6 changed files with 338 additions and 30 deletions
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159
Assets/Prefabs/Status Display.prefab
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@ -523,6 +525,7 @@ MonoBehaviour:
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aboveDisplay: {fileID: 8497902669476004809}
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@ -600,6 +603,83 @@ MonoBehaviour:
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4
Assets/Scenes/SampleScene.unity
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@ -545,7 +545,9 @@ MonoBehaviour:
m_Name:
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player: {fileID: 1313500787}
camera: {fileID: 0}
maxAcceleration: 1
maxVelocity: 10
smoothTime: 0.3
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Camera:
m_ObjectHideFlags: 0

56
Assets/Scripts/CameraController.cs
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@ -2,25 +2,32 @@
using System.Collections.Generic;
using UnityEngine;
[RequireComponent(typeof(Camera))]
public class CameraController : MonoBehaviour {
public Transform player;
public Camera camera;
public float maxAcceleration = 1f;
public float maxVelocity = 10f;
private Frame frame;
private Vector3 velocity;
private Vector3 lastVelocity;
private Vector3 acceleration;
private Vector3 lastAcceleration;
// the camera's ideal position, which we will continually move towards but
// not necessarily snap to (to avoid jerky camera motion)
private Vector3 targetPosition;
private Vector3 velocity = Vector3.zero;
public float smoothTime = 0.0025f;
// private Vector3 acceleration = Vector3.zero;
// the values of position, velocity, and acceleration last frame
// private Vector3 lastPosition = Vector3.zero;
// private Vector3 lastVelocity = Vector3.zero;
// private Vector3 lastAcceleration = Vector3.zero;
private Camera cam;
// Start is called before the first frame update
void Start() {
camera = gameObject.GetComponent<Camera>();
velocity.x = 0;
velocity.y = 0;
velocity.z = 0;
cam = gameObject.GetComponent<Camera>();
}
void Update() {
@ -33,23 +40,26 @@ public class CameraController : MonoBehaviour {
}
setupFrame();
Vector3 targetPosition = transform.position;
targetPosition = transform.position;
BoxCollider2D collider = player.GetComponent<BoxCollider2D>();
if (collider.bounds.max.x > frame.topRight.x) {
targetPosition.x = collider.bounds.max.x - frame.topRight.x;
}
if (collider.bounds.min.x < frame.topLeft.x) {
targetPosition.x = collider.bounds.min.x - frame.topLeft.x;
targetPosition.x += collider.bounds.max.x - frame.topRight.x;
} else if (collider.bounds.min.x < frame.topLeft.x) {
targetPosition.x += collider.bounds.min.x - frame.topLeft.x;
}
if (collider.bounds.max.y > frame.topLeft.y) {
targetPosition.y = collider.bounds.max.y - frame.topLeft.y;
}
if (collider.bounds.min.y < frame.bottomLeft.y) {
targetPosition.y = collider.bounds.min.y - frame.bottomLeft.y;
targetPosition.y += collider.bounds.max.y - frame.topLeft.y;
} else if (collider.bounds.min.y < frame.bottomLeft.y) {
targetPosition.y += collider.bounds.min.y - frame.bottomLeft.y;
}
transform.position = Vector3.SmoothDamp(transform.position, targetPosition, ref velocity, smoothTime);
// lastPosition = transform.position;
// lastVelocity = velocity;
// lastAcceleration = acceleration;
}
void OnDrawGizmosSelected() {
@ -83,10 +93,10 @@ public class CameraController : MonoBehaviour {
int height = Screen.height;
int width = Screen.width;
frame.topLeft = camera.ScreenToWorldPoint(new Vector3(width / 2 - width / 6, height / 2 + height / 3, 1));
frame.topRight = camera.ScreenToWorldPoint(new Vector3(width / 2 + width / 6, height / 2 + height / 3, 1));
frame.bottomLeft = camera.ScreenToWorldPoint(new Vector3(width / 2 - width / 6, height / 2 - height / 3, 1));
frame.bottomRight = camera.ScreenToWorldPoint(new Vector3(width / 2 + width / 6, height / 2 - height / 3, 1));
frame.topLeft = cam.ScreenToWorldPoint(new Vector3(width / 2 - width / 9, height / 2 + height / 3, 1));
frame.topRight = cam.ScreenToWorldPoint(new Vector3(width / 2 + width / 9, height / 2 + height / 3, 1));
frame.bottomLeft = cam.ScreenToWorldPoint(new Vector3(width / 2 - width / 9, height / 2 - height / 3, 1));
frame.bottomRight = cam.ScreenToWorldPoint(new Vector3(width / 2 + width / 9, height / 2 - height / 3, 1));
}
struct Frame {

29
Assets/Scripts/MoveControllerDebugDisplay.cs
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@ -9,13 +9,16 @@ public class MoveControllerDebugDisplay : MonoBehaviour {
public Text rightDisplay;
public Text aboveDisplay;
public Text belowDisplay;
public Text jumpStateDisplay;
private PlayerController player;
private MoveController moveController;
// Start is called before the first frame update
void Start() {
if (target) {
moveController = target.GetComponent<MoveController>();
player = target.GetComponent<PlayerController>();
}
}
@ -27,6 +30,32 @@ public class MoveControllerDebugDisplay : MonoBehaviour {
showBool(leftDisplay, moveController.collisions.left);
showBool(rightDisplay, moveController.collisions.right);
}
if (player) {
switch (player.jumpState) {
case PlayerController.JumpState.Grounded:
jumpStateDisplay.text = "Grounded";
break;
case PlayerController.JumpState.CoyoteTime:
jumpStateDisplay.text = "CoyoteTime";
break;
case PlayerController.JumpState.Ascending:
jumpStateDisplay.text = "Ascending";
break;
case PlayerController.JumpState.Apex:
jumpStateDisplay.text = "Apex";
break;
case PlayerController.JumpState.Descending:
jumpStateDisplay.text = "Descending";
break;
case PlayerController.JumpState.Falling:
jumpStateDisplay.text = "Falling";
break;
default:
jumpStateDisplay.text = "???";
break;
}
}
}
void showBool(Text label, bool value) {

118
Assets/Scripts/PlayerController.cs
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@ -11,24 +11,31 @@ public class PlayerController : MonoBehaviour {
public float maxFallSpeed = -20f;
public float timeToMaxRunSpeed = 0.15f;
public float timeToMaxAirmoveSpeed = 0.25f;
public float floatTime = 0.025f; // amount of time spent at max jump height before falling again
public float coyoteTime = 0.025f;
// this has to be public to be readable by the display, which is a code
// smell.
public JumpState jumpState;
private float jumpStateStart;
private float jumpVelocity = 8f;
private float gravity = -20f;
private Vector3 velocity;
private MoveController moveController;
private float velocityXSmoothing;
private int frameCount = 0;
void Start() {
setJumpState(JumpState.Falling);
moveController = GetComponent<MoveController>();
gravity = -(2* jumpHeight) / Mathf.Pow(timeToJumpApex, 2);
jumpVelocity = Mathf.Abs(gravity) * timeToJumpApex;
}
void Update() {
frameCount++;
Vector2 input = new Vector2(Input.GetAxisRaw("Horizontal"), Input.GetAxisRaw("Vertical"));
float targetX = input.x * moveSpeed;
Vector3 initialVelocity = velocity;
if (moveController.collisions.above) {
velocity.y = 0;
@ -38,22 +45,84 @@ public class PlayerController : MonoBehaviour {
velocity.x = 0;
}
if (moveController.isGrounded) {
switch (jumpState) {
case JumpState.Grounded:
if (Input.GetButtonDown("Jump")) {
setJumpState(JumpState.Ascending);
velocity.y = jumpVelocity;
} else {
velocity.y = gravity * Time.deltaTime;
}
velocity.x = Mathf.SmoothDamp(velocity.x, targetX, ref velocityXSmoothing, timeToMaxRunSpeed);
} else {
break;
// case JumpState.Ascending:
// velocity.x = Mathf.SmoothDamp(velocity.x, targetX, ref velocityXSmoothing, timeToMaxAirmoveSpeed);
// velocity.y += gravity * Time.deltaTime;
// if (velocity.y < maxFallSpeed) {
// velocity.y = maxFallSpeed;
// }
// // if we were rising in the last frame but will be falling in this
// // frame, we should zero out the velocity to float instead.
// if (initialVelocity.y >= 0 && velocity.y <= 0) {
// velocity.y = 0;
// setJumpState(JumpState.Apex);
// }
// break;
case JumpState.Apex:
velocity.x = Mathf.SmoothDamp(velocity.x, targetX, ref velocityXSmoothing, timeToMaxAirmoveSpeed);
float timeFloating = Time.time - jumpStateStart;
float floatTimeRemaining = floatTime - timeFloating;
if (floatTimeRemaining < 0) {
velocity.y += gravity * -floatTimeRemaining;
setJumpState(JumpState.Descending);
} else {
velocity.y = 0;
}
break;
case JumpState.CoyoteTime:
velocity.x = Mathf.SmoothDamp(velocity.x, targetX, ref velocityXSmoothing, timeToMaxRunSpeed);
if (Input.GetButtonDown("Jump")) {
setJumpState(JumpState.Ascending);
velocity.y = jumpVelocity;
} else {
float elapsedCoyoteTime = Time.time - jumpStateStart;
float coyoteTimeRemaining = coyoteTime - elapsedCoyoteTime;
if (coyoteTimeRemaining < 0) {
velocity.y += gravity * -coyoteTimeRemaining;
setJumpState(JumpState.Falling);
} else {
velocity.y = 0;
}
}
break;
default:
velocity.x = Mathf.SmoothDamp(velocity.x, targetX, ref velocityXSmoothing, timeToMaxAirmoveSpeed);
velocity.y += gravity * Time.deltaTime;
if (velocity.y < maxFallSpeed) {
velocity.y = maxFallSpeed;
}
// if we were rising in the last frame but will be falling in this
// frame, we should zero out the velocity to float instead.
if (initialVelocity.y >= 0 && velocity.y <= 0) {
velocity.y = 0;
setJumpState(JumpState.Apex);
}
break;
}
moveController.Move(velocity * Time.deltaTime);
if (jumpState == JumpState.Grounded && !moveController.isGrounded) {
setJumpState(JumpState.CoyoteTime);
}
if (jumpState != JumpState.Grounded && moveController.isGrounded) {
setJumpState(JumpState.Grounded);
}
}
void OnDestroy() {
@ -64,4 +133,45 @@ public class PlayerController : MonoBehaviour {
void OnTriggerEnter(Collider other) {
}
void setJumpState(JumpState state) {
jumpState = state;
jumpStateStart = Time.time;
}
/*
Possible JumpState transitions:
Grounded -> Ascending : a normal jump
Grounded -> CoyoteTime : player has walked off ledge
CoyoteTime -> Ascending : player has jumped after leaving a ledge
CoyoteTime -> Falling : player has walked off of a ledge and is now falling
Ascending -> Apex : player has reached the top of their jump normally
Apex -> Descending : player has reached the top of their jump and is now falling
*/
public enum JumpState {
// The player is on the ground
Grounded,
// The player has not jumped; they have walked off of a platform without
// jumping
CoyoteTime,
// The player is rising in a jump
Ascending,
// The player has reached the apex of their jump, where they will
// briefly remain to give a feeling of lightness
Apex,
// The player, having jumped, is in a controlled descent following the
// jump
Descending,
// The player is descending but without control; they are falling but
// did not initially jump.
Falling,
}
}

2
Packages/manifest.json
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@ -6,7 +6,7 @@
"com.unity.analytics": "3.3.5",
"com.unity.collab-proxy": "1.2.16",
"com.unity.ide.rider": "1.1.4",
"com.unity.ide.vscode": "1.1.4",
"com.unity.ide.vscode": "1.1.3",
"com.unity.multiplayer-hlapi": "1.0.4",
"com.unity.purchasing": "2.0.6",
"com.unity.quicksearch": "1.6.0-preview.6",

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