作为刚入门小游戏，在制作过程中遇到一些问题，挑重点记录下。
第一：摇杆的制作
使用了官方的joystick类，但是官方没有提供c#版的joystick，这就导致了我不会将js脚本和c#脚本进行通信。最后解决办法是找到网络大牛翻译回来的joystick c#版本，顺利实现摇杆。附上c#版joystick
using UnityEngine;
/**
* File: MPJoystick.cs
* Author: Chris Danielson of (monkeyprism.com)
*
// USED TO BE: Joystick.js taken from Penelope iPhone Tutorial
//
// Joystick creates a movable joystick (via GUITexture) that
// handles touch input, taps, and phases. Dead zones can control
// where the joystick input gets picked up and can be normalized.
//
// Optionally, you can enable the touchPad property from the editor
// to treat this Joystick as a TouchPad. A TouchPad allows the finger
// to touch down at any point and it tracks the movement relatively
// without moving the graphic
*/
[RequireComponent(typeof(GUITexture))]
public class MPJoystick : MonoBehaviour
{
class Boundary
{
public Vector2 min = Vector2.zero;
public Vector2 max = Vector2.zero;
}
private static MPJoystick[] joysticks; // A static collection of all joysticks
private static bool enumeratedJoysticks = false;
private static float tapTimeDelta = 0.3f; // Time allowed between taps
public bool touchPad;
public Vector2 position = Vector2.zero;
public Rect touchZone;
public Vector2 deadZone = Vector2.zero; // Control when position is output
public bool normalize = false; // Normalize output after the dead-zone?
public int tapCount;
private int lastFingerId = -1; // Finger last used for this joystick
private float tapTimeWindow; // How much time there is left for a tap to occur
private Vector2 fingerDownPos;
//private float fingerDownTime;
//private float firstDeltaTime = 0.5f;
private GUITexture gui;
private Rect defaultRect; // Default position / extents of the joystick graphic
private Boundary guiBoundary = new Boundary(); // Boundary for joystick graphic
private Vector2 guiTouchOffset; // Offset to apply to touch input
private Vector2 guiCenter; // Center of joystick
void Start()
{
gui = (GUITexture)GetComponent(typeof(GUITexture));
defaultRect = gui.pixelInset;
defaultRect.x += transform.position.x * Screen.width;// + gui.pixelInset.x; // - Screen.width * 0.5;
defaultRect.y += transform.position.y * Screen.height;// - Screen.height * 0.5;
transform.position = Vector3.zero;
if (touchPad)
{
// If a texture has been assigned, then use the rect ferom the gui as our touchZone
if (gui.texture)
touchZone = defaultRect;
}
else
{
guiTouchOffset.x = defaultRect.width * 0.5f;
guiTouchOffset.y = defaultRect.height * 0.5f;
// Cache the center of the GUI, since it doesn't change
guiCenter.x = defaultRect.x + guiTouchOffset.x;
guiCenter.y = defaultRect.y + guiTouchOffset.y;
// Let's build the GUI boundary, so we can clamp joystick movement
guiBoundary.min.x = defaultRect.x - guiTouchOffset.x;
guiBoundary.max.x = defaultRect.x + guiTouchOffset.x;
guiBoundary.min.y = defaultRect.y - guiTouchOffset.y;
guiBoundary.max.y = defaultRect.y + guiTouchOffset.y;
}
}
public Vector2 getGUICenter()
{
return guiCenter;
}
void Disable()
{
gameObject.active = false;
//enumeratedJoysticks = false;
}
private void ResetJoystick()
{
gui.pixelInset = defaultRect;
lastFingerId = -1;
position = Vector2.zero;
fingerDownPos = Vector2.zero;
}
private bool IsFingerDown()
{
return (lastFingerId != -1);
}
public void LatchedFinger(int fingerId)
{
// If another joystick has latched this finger, then we must release it
if (lastFingerId == fingerId)
ResetJoystick();
}
void Update()
{
if (!enumeratedJoysticks)
{
// Collect all joysticks in the game, so we can relay finger latching messages
joysticks = (MPJoystick[])FindObjectsOfType(typeof(MPJoystick));
enumeratedJoysticks = true;
}
int count = Input.touchCount;
if (tapTimeWindow > 0)
tapTimeWindow -= Time.deltaTime;
else
tapCount = 0;
if (count == 0)
ResetJoystick();
else
{
for (int i = 0; i < count; i++)
{
Touch touch = Input.GetTouch(i);
Vector2 guiTouchPos = touch.position - guiTouchOffset;
bool shouldLatchFinger = false;
if (touchPad)
{
if (touchZone.Contains(touch.position))
shouldLatchFinger = true;
}
else if (gui.HitTest(touch.position))
{
shouldLatchFinger = true;
}
// Latch the finger if this is a new touch
if (shouldLatchFinger && (lastFingerId == -1 || lastFingerId != touch.fingerId))
{
if (touchPad)
{
//gui.color.a = 0.15;
lastFingerId = touch.fingerId;
//fingerDownPos = touch.position;
//fingerDownTime = Time.time;
}
lastFingerId = touch.fingerId;
// Accumulate taps if it is within the time window
if (tapTimeWindow > 0)
tapCount++;
else
{
tapCount = 1;
tapTimeWindow = tapTimeDelta;
}
// Tell other joysticks we've latched this finger
//for ( j : Joystick in joysticks )
foreach (MPJoystick j in joysticks)
{
if (j != this)
j.LatchedFinger(touch.fingerId);
}
}
if (lastFingerId == touch.fingerId)
{
// Override the tap count with what the iPhone SDK reports if it is greater
// This is a workaround, since the iPhone SDK does not currently track taps
// for multiple touches
if (touch.tapCount > tapCount)
tapCount = touch.tapCount;
if (touchPad)
{
// For a touchpad, let's just set the position directly based on distance from initial touchdown
position.x = Mathf.Clamp((touch.position.x - fingerDownPos.x) / (touchZone.width / 2), -1, 1);
position.y = Mathf.Clamp((touch.position.y - fingerDownPos.y) / (touchZone.height / 2), -1, 1);
}
else
{
// Change the location of the joystick graphic to match where the touch is
Rect r = gui.pixelInset;
r.x = Mathf.Clamp(guiTouchPos.x, guiBoundary.min.x, guiBoundary.max.x);
r.y = Mathf.Clamp(guiTouchPos.y, guiBoundary.min.y, guiBoundary.max.y);
gui.pixelInset = r;
}
if (touch.phase == TouchPhase.Ended || touch.phase == TouchPhase.Canceled)
ResetJoystick();
}
}
}
if (!touchPad)
{
// Get a value between -1 and 1 based on the joystick graphic location
position.x = (gui.pixelInset.x + guiTouchOffset.x - guiCenter.x) / guiTouchOffset.x;
position.y = (gui.pixelInset.y + guiTouchOffset.y - guiCenter.y) / guiTouchOffset.y;
}
// Adjust for dead zone
var absoluteX = Mathf.Abs(position.x);
var absoluteY = Mathf.Abs(position.y);
if (absoluteX < deadZone.x)
{
// Report the joystick as being at the center if it is within the dead zone
position.x = 0;
}
else if (normalize)
{
// Rescale the output after taking the dead zone into account
position.x = Mathf.Sign(position.x) * (absoluteX - deadZone.x) / (1 - deadZone.x);
}
if (absoluteY < deadZone.y)
{
// Report the joystick as being at the center if it is within the dead zone
position.y = 0;
}
else if (normalize)
{
// Rescale the output after taking the dead zone into account
position.y = Mathf.Sign(position.y) * (absoluteY - deadZone.y) / (1 - deadZone.y);
}
}
}
第二，屏幕边界处理，还没有学会ngui，只能用最笨拙的方法处理超屏问题。
//屏幕限制范围
Vector2 screenpos = Camera.main.WorldToScreenPoint(m_transform.position);
float x = screenpos.x;
float y = screenpos.y;
float cross_x = Screen.width;
float cross_y = Screen.height;
float xx=-1.0f;
float yy=5.0f;
float cross_xx=5.0f;
float cross_yy=15.0f;
if (x < 0)
{
m_transform.position = new Vector3(xx, m_transform.position.y, m_transform.position.z);
}
else if (x > cross_x)
m_transform.position = new Vector3(cross_xx, m_transform.position.y, m_transform.position.z);
if (y < 0)
m_transform.position = new Vector3(m_transform.position.x, m_transform.position.y, yy);
else if (y > cross_y)
m_transform.position = new Vector3(m_transform.position.x, m_transform.position.y, cross_yy);