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服务器之家 - 编程语言 - C# - Unity实现游戏卡牌滚动效果

Unity实现游戏卡牌滚动效果

2022-03-11 12:52OneWord233 C#

这篇文章主要为大家详细介绍了Unity实现游戏卡牌滚动效果,文中示例代码介绍的非常详细,具有一定的参考价值,感兴趣的小伙伴们可以参考一下

最近项目中的活动面板要做来回滚动卡牌预览效果,感觉自己来写的话,也能写,但是可能会比较耗时,看到github上有开源的项目,于是就借用了,github的资源地址,感谢作者的分享。

本篇博客旨在告诉大家如何利用这个插件。

插件的核心在于工程中的6个脚本,以下是六个脚本的源码:

dragenhanceview.cs

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using unityengine;
using system.collections;
using unityengine.ui;
using unityengine.eventsystems;
 
public class uguienhanceitem : enhanceitem
{
 private button ubutton;
 private image image;
 
 protected override void onstart()
 {
 image = getcomponent<image>();
 ubutton = getcomponent<button>();
 ubutton.onclick.addlistener(onclickuguibutton);
 }
 
 private void onclickuguibutton()
 {
 onclickenhanceitem();
 }
 
 // set the item "depth" 2d or 3d
 protected override void setitemdepth(float depthcurvevalue, int depthfactor, float itemcount)
 {
 int newdepth = (int)(depthcurvevalue * itemcount);
 this.transform.setsiblingindex(newdepth);
 }
 
 public override void setselectstate(bool iscenter)
 {
 if (image == null)
  image = getcomponent<image>();
 image.color = iscenter ? color.white : color.gray;
 }
}

enhancescrollviewdragcontroller.cs

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using unityengine;
using system.collections;
 
public class enhancescrollviewdragcontroller : monobehaviour
{
 private vector2 lastposition = vector2.zero;
 private vector2 cachedposition = vector2.zero;
 private gameobject dragtarget;
 
 private camera targetcamera;
 private int raycastmask = 0;
 private bool dragstart = false;
 
 public void settargetcameraandmask(camera camera, int mask)
 {
 this.targetcamera = camera;
 this.raycastmask = mask;
 }
 
 void update()
 {
 if (this.targetcamera == null)
  return;
#if unity_editor
 processmouseinput();
#elif unity_ios || unity_android
 processtouchinput();
#endif
 }
 
 /// <summary>
 /// process mouse input
 /// </summary>
 private void processmouseinput()
 {
 if (input.getmousebuttondown(0))
 {
  if (targetcamera == null)
  return;
  dragtarget = raycast(this.targetcamera, input.mouseposition);
  lastposition.x = input.mouseposition.x;
  lastposition.y = input.mouseposition.y;
 }
 if (input.getmousebutton(0))
 {
  if (dragtarget == null)
  return;
  cachedposition.x = input.mouseposition.x;
  cachedposition.y = input.mouseposition.y;
  vector2 delta = cachedposition - lastposition;
  if (!dragstart && delta.sqrmagnitude != 0f)
  dragstart = true;
 
  if (dragstart)
  {
  // notify target
  dragtarget.sendmessage("onenhanceviewdrag", delta, sendmessageoptions.dontrequirereceiver);
  }
  lastposition = cachedposition;
 }
 
 if (input.getmousebuttonup(0))
 {
  if (dragtarget != null && dragstart)
  {
  dragtarget.sendmessage("onenhaneviewdragend", sendmessageoptions.dontrequirereceiver);
  }
  dragtarget = null;
  dragstart = false;
 }
 }
 
 /// <summary>
 /// process touch input
 /// </summary>
 private void processtouchinput()
 {
 if (input.touchcount > 0)
 {
  touch touch = input.gettouch(0);
  if (touch.phase == touchphase.began)
  {
  if (targetcamera == null)
   return;
  dragtarget = raycast(this.targetcamera, input.mouseposition);
  }
  else if (touch.phase == touchphase.moved)
  {
  if (dragtarget == null)
   return;
  if (!dragstart && touch.deltaposition.sqrmagnitude != 0f)
  {
   dragstart = true;
  }
  if (dragstart)
  {
   // notify target
   dragtarget.sendmessage("onenhanceviewdrag", touch.deltaposition, sendmessageoptions.dontrequirereceiver);
  }
  }
  else if (touch.phase == touchphase.ended)
  {
  if (dragtarget != null && dragstart)
  {
   dragtarget.sendmessage("onenhaneviewdragend", sendmessageoptions.dontrequirereceiver);
  }
  dragtarget = null;
  dragstart = false;
  }
 }
 }
 
 public gameobject raycast(camera cam, vector3 inpos)
 {
 vector3 pos = cam.screentoviewportpoint(inpos);
 if (float.isnan(pos.x) || float.isnan(pos.y))
  return null;
 if (pos.x < 0f || pos.x > 1f || pos.y < 0f || pos.y > 1f) return null;
 
 ray ray = cam.screenpointtoray(inpos);
 float dis = 100f;
 raycasthit[] hits = physics.raycastall(ray, dis, raycastmask);
 if (hits.length > 0)
 {
  for (int i = 0; i < hits.length; i++)
  {
  gameobject go = hits[i].collider.gameobject;
  dragenhanceview dragview = go.getcomponent<dragenhanceview>();
  if (dragview == null)
   continue;
  else
  {
   // just return current hover object our drag target
   return go;
  }
  }
 }
 return null;
 }
}

enhanceitem.cs

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using unityengine;
using system.collections;
 
public class enhanceitem : monobehaviour
{
 // start index
 private int curveoffsetindex = 0;
 public int curveoffsetindex
 {
 get { return this.curveoffsetindex; }
 set { this.curveoffsetindex = value; }
 }
 
 // runtime real index(be calculated in runtime)
 private int currealindex = 0;
 public int realindex
 {
 get { return this.currealindex; }
 set { this.currealindex = value; }
 }
 
 // curve center offset
 private float dcurvecenteroffset = 0.0f;
 public float centeroffset
 {
 get { return this.dcurvecenteroffset; }
 set { dcurvecenteroffset = value; }
 }
 private transform mtrs;
 
 void awake()
 {
 mtrs = this.transform;
 onawake();
 }
 
 void start()
 {
 onstart();
 }
 
 // update item's status
 // 1. position
 // 2. scale
 // 3. "depth" is 2d or z position in 3d to set the front and back item
 public void updatescrollviewitems(
 float xvalue,
 float depthcurvevalue,
 int depthfactor,
 float itemcount,
 float yvalue,
 float scalevalue)
 {
 vector3 targetpos = vector3.one;
 vector3 targetscale = vector3.one;
 // position
 targetpos.x = xvalue;
 targetpos.y = yvalue;
 mtrs.localposition = targetpos;
 
 // set the "depth" of item
 // targetpos.z = depthvalue;
 setitemdepth(depthcurvevalue, depthfactor, itemcount);
 // scale
 targetscale.x = targetscale.y = scalevalue;
 mtrs.localscale = targetscale;
 }
 
 protected virtual void onclickenhanceitem()
 {
 enhancescrollview.getinstance.sethorizontaltargetitemindex(this);
 }
 
 protected virtual void onstart()
 {
 }
 
 protected virtual void onawake()
 {
 }
 
 protected virtual void setitemdepth(float depthcurvevalue, int depthfactor, float itemcount)
 {
 }
 
 // set the item center state
 public virtual void setselectstate(bool iscenter)
 {
 }
}

enhancescrollview.cs

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using unityengine;
using system.collections;
using system.collections.generic;
 
public class enhancescrollview : monobehaviour
{
 public enum inputsystemtype
 {
 nguiandworldinput, // use enhancescrollviewdragcontroller.cs to get the input(keyboard and touch)
 uguiinput,  // use udragenhanceview for each item to get drag event
 }
 
 // input system type(ngui or 3d world, ugui)
 public inputsystemtype inputtype = inputsystemtype.nguiandworldinput;
 // control the item's scale curve
 public animationcurve scalecurve;
 // control the position curve
 public animationcurve positioncurve;
 // control the "depth"'s curve(in 3d version just the z value, in 2d ui you can use the depth(ngui))
 // note:
 // 1. in ngui set the widget's depth may cause performance problem
 // 2. if you use 3d ui just set the item's z position
 public animationcurve depthcurve = new animationcurve(new keyframe(0, 0), new keyframe(0.5f, 1), new keyframe(1, 0));
 // the start center index
 [tooltip("the start center index")]
 public int startcenterindex = 0;
 // offset width between item
 public float cellwidth = 10f;
 private float totalhorizontalwidth = 500.0f;
 // vertical fixed position value
 public float yfixedpositionvalue = 46.0f;
 
 // lerp duration
 public float lerpduration = 0.2f;
 private float mcurrentduration = 0.0f;
 private int mcenterindex = 0;
 public bool enablelerptween = true;
 
 // center and precentered item
 private enhanceitem curcenteritem;
 private enhanceitem precenteritem;
 
 // if we can change the target item
 private bool canchangeitem = true;
 private float dfactor = 0.2f;
 
 // originhorizontalvalue lerp to horizontaltargetvalue
 private float originhorizontalvalue = 0.1f;
 public float curhorizontalvalue = 0.5f;
 
 // "depth" factor (2d widget depth or 3d z value)
 private int depthfactor = 5;
 
 // drag enhance scroll view
 [tooltip("camera for drag ray cast")]
 public camera sourcecamera;
 private enhancescrollviewdragcontroller dragcontroller;
 
 public void enabledrag(bool isenabled)
 {
 if (isenabled)
 {
  if (inputtype == inputsystemtype.nguiandworldinput)
  {
  if (sourcecamera == null)
  {
   debug.logerror("## source camera for drag scroll view is null ##");
   return;
  }
 
  if (dragcontroller == null)
   dragcontroller = gameobject.addcomponent<enhancescrollviewdragcontroller>();
  dragcontroller.enabled = true;
  // set the camera and mask
  dragcontroller.settargetcameraandmask(sourcecamera, (1 << layermask.nametolayer("ui")));
  }
 }
 else
 {
  if (dragcontroller != null)
  dragcontroller.enabled = false;
 }
 }
 
 // targets enhance item in scroll view
 public list<enhanceitem> listenhanceitems;
 // sort to get right index
 private list<enhanceitem> listsorteditems = new list<enhanceitem>();
 
 private static enhancescrollview instance;
 public static enhancescrollview getinstance
 {
 get { return instance; }
 }
 
 void awake()
 {
 instance = this;
 }
 
 void start()
 {
 canchangeitem = true;
 int count = listenhanceitems.count;
 dfactor = (mathf.roundtoint((1f / count) * 10000f)) * 0.0001f;
 mcenterindex = count / 2;
 if (count % 2 == 0)
  mcenterindex = count / 2 - 1;
 int index = 0;
 for (int i = count - 1; i >= 0; i--)
 {
  listenhanceitems[i].curveoffsetindex = i;
  listenhanceitems[i].centeroffset = dfactor * (mcenterindex - index);
  listenhanceitems[i].setselectstate(false);
  gameobject obj = listenhanceitems[i].gameobject;
 
  if (inputtype == inputsystemtype.nguiandworldinput)
  {
  dragenhanceview script = obj.getcomponent<dragenhanceview>();
  if (script != null)
   script.setscrollview(this);
  }
  else
  {
  udragenhanceview script = obj.getcomponent<udragenhanceview>();
  if (script != null)
   script.setscrollview(this);
  }
  index++;
 }
 
 // set the center item with startcenterindex
 if (startcenterindex < 0 || startcenterindex >= count)
 {
  debug.logerror("## startcenterindex < 0 || startcenterindex >= listenhanceitems.count out of index ##");
  startcenterindex = mcenterindex;
 }
 
 // sorted items
 listsorteditems = new list<enhanceitem>(listenhanceitems.toarray());
 totalhorizontalwidth = cellwidth * count;
 curcenteritem = listenhanceitems[startcenterindex];
 curhorizontalvalue = 0.5f - curcenteritem.centeroffset;
 lerptweentotarget(0f, curhorizontalvalue, false);
 
 //
 // enable the drag actions
 //
 enabledrag(true);
 }
 
 private void lerptweentotarget(float originvalue, float targetvalue, bool needtween = false)
 {
 if (!needtween)
 {
  sortenhanceitem();
  originhorizontalvalue = targetvalue;
  updateenhancescrollview(targetvalue);
  this.ontweenover();
 }
 else
 {
  originhorizontalvalue = originvalue;
  curhorizontalvalue = targetvalue;
  mcurrentduration = 0.0f;
 }
 enablelerptween = needtween;
 }
 
 public void disablelerptween()
 {
 this.enablelerptween = false;
 }
 
 ///
 /// update enhanceitem state with curve ftime value
 ///
 public void updateenhancescrollview(float fvalue)
 {
 for (int i = 0; i < listenhanceitems.count; i++)
 {
  enhanceitem itemscript = listenhanceitems[i];
  float xvalue = getxposvalue(fvalue, itemscript.centeroffset);
  float scalevalue = getscalevalue(fvalue, itemscript.centeroffset);
  float depthcurvevalue = depthcurve.evaluate(fvalue + itemscript.centeroffset);
  itemscript.updatescrollviewitems(xvalue, depthcurvevalue, depthfactor, listenhanceitems.count, yfixedpositionvalue, scalevalue);
 }
 }
 
 void update()
 {
 if (enablelerptween)
  tweenviewtotarget();
 }
 
 private void tweenviewtotarget()
 {
 mcurrentduration += time.deltatime;
 if (mcurrentduration > lerpduration)
  mcurrentduration = lerpduration;
 
 float percent = mcurrentduration / lerpduration;
 float value = mathf.lerp(originhorizontalvalue, curhorizontalvalue, percent);
 updateenhancescrollview(value);
 if (mcurrentduration >= lerpduration)
 {
  canchangeitem = true;
  enablelerptween = false;
  ontweenover();
 }
 }
 
 private void ontweenover()
 {
 if (precenteritem != null)
  precenteritem.setselectstate(false);
 if (curcenteritem != null)
  curcenteritem.setselectstate(true);
 }
 
 // get the evaluate value to set item's scale
 private float getscalevalue(float slidervalue, float added)
 {
 float scalevalue = scalecurve.evaluate(slidervalue + added);
 return scalevalue;
 }
 
 // get the x value set the item's position
 private float getxposvalue(float slidervalue, float added)
 {
 float evaluatevalue = positioncurve.evaluate(slidervalue + added) * totalhorizontalwidth;
 return evaluatevalue;
 }
 
 private int getmovecurvefactorcount(enhanceitem precenteritem, enhanceitem newcenteritem)
 {
 sortenhanceitem();
 int factorcount = mathf.abs(newcenteritem.realindex) - mathf.abs(precenteritem.realindex);
 return mathf.abs(factorcount);
 }
 
 // sort item with x so we can know how much distance we need to move the timeline(curve time line)
 static public int sortposition(enhanceitem a, enhanceitem b) { return a.transform.localposition.x.compareto(b.transform.localposition.x); }
 private void sortenhanceitem()
 {
 listsorteditems.sort(sortposition);
 for (int i = listsorteditems.count - 1; i >= 0; i--)
  listsorteditems[i].realindex = i;
 }
 
 public void sethorizontaltargetitemindex(enhanceitem selectitem)
 {
 if (!canchangeitem)
  return;
 
 if (curcenteritem == selectitem)
  return;
 
 canchangeitem = false;
 precenteritem = curcenteritem;
 curcenteritem = selectitem;
 
 // calculate the direction of moving
 float centerxvalue = positioncurve.evaluate(0.5f) * totalhorizontalwidth;
 bool isright = false;
 if (selectitem.transform.localposition.x > centerxvalue)
  isright = true;
 
 // calculate the offset * dfactor
 int moveindexcount = getmovecurvefactorcount(precenteritem, selectitem);
 float dvalue = 0.0f;
 if (isright)
 {
  dvalue = -dfactor * moveindexcount;
 }
 else
 {
  dvalue = dfactor * moveindexcount;
 }
 float originvalue = curhorizontalvalue;
 lerptweentotarget(originvalue, curhorizontalvalue + dvalue, true);
 }
 
 // click the right button to select the next item.
 public void onbtnrightclick()
 {
 if (!canchangeitem)
  return;
 int targetindex = curcenteritem.curveoffsetindex + 1;
 if (targetindex > listenhanceitems.count - 1)
  targetindex = 0;
 sethorizontaltargetitemindex(listenhanceitems[targetindex]);
 }
 
 // click the left button the select next next item.
 public void onbtnleftclick()
 {
 if (!canchangeitem)
  return;
 int targetindex = curcenteritem.curveoffsetindex - 1;
 if (targetindex < 0)
  targetindex = listenhanceitems.count - 1;
 sethorizontaltargetitemindex(listenhanceitems[targetindex]);
 }
 
 public float factor = 0.001f;
 // on drag move
 public void ondragenhanceviewmove(vector2 delta)
 {
 // in developing
 if (mathf.abs(delta.x) > 0.0f)
 {
  curhorizontalvalue += delta.x * factor;
  lerptweentotarget(0.0f, curhorizontalvalue, false);
 }
 }
 
 // on drag end
 public void ondragenhanceviewend()
 {
 // find closed item to be centered
 int closestindex = 0;
 float value = (curhorizontalvalue - (int)curhorizontalvalue);
 float min = float.maxvalue;
 float tmp = 0.5f * (curhorizontalvalue < 0 ? -1 : 1);
 for (int i = 0; i < listenhanceitems.count; i++)
 {
  float dis = mathf.abs(mathf.abs(value) - mathf.abs((tmp - listenhanceitems[i].centeroffset)));
  if (dis < min)
  {
  closestindex = i;
  min = dis;
  }
 }
 originhorizontalvalue = curhorizontalvalue;
 float target = ((int)curhorizontalvalue + (tmp - listenhanceitems[closestindex].centeroffset));
 precenteritem = curcenteritem;
 curcenteritem = listenhanceitems[closestindex];
 lerptweentotarget(originhorizontalvalue, target, true);
 canchangeitem = false;
 }
}

nguienhanceitem.cs

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using unityengine;
using system.collections;
 
/// <summary>
/// ngui enhance item example
/// </summary>
public class nguienhanceitem : enhanceitem
{
 private uitexture mtexture;
 
 protected override void onawake()
 {
 this.mtexture = getcomponent<uitexture>();
 uieventlistener.get(this.gameobject).onclick = onclicknguiitem;
 }
 
 private void onclicknguiitem(gameobject obj)
 {
 this.onclickenhanceitem();
 }
 
 // set the item "depth" 2d or 3d
 protected override void setitemdepth(float depthcurvevalue, int depthfactor, float itemcount)
 {
 if (mtexture.depth != (int)mathf.abs(depthcurvevalue * depthfactor))
  mtexture.depth = (int)mathf.abs(depthcurvevalue * depthfactor);
 }
 
 // item is centered
 public override void setselectstate(bool iscenter)
 {
 if (mtexture == null)
  mtexture = this.getcomponent<uitexture>();
 if (mtexture != null)
  mtexture.color = iscenter ? color.white : color.gray;
 }
 
 protected override void onclickenhanceitem()
 {
 // item was clicked
 base.onclickenhanceitem();
 }
}

uguienhanceitem.cs

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using unityengine;
using system.collections;
using unityengine.ui;
using unityengine.eventsystems;
 
public class uguienhanceitem : enhanceitem
{
 private button ubutton;
 private image image;
 
 protected override void onstart()
 {
 image = getcomponent<image>();
 ubutton = getcomponent<button>();
 ubutton.onclick.addlistener(onclickuguibutton);
 }
 
 private void onclickuguibutton()
 {
 onclickenhanceitem();
 }
 
 // set the item "depth" 2d or 3d
 protected override void setitemdepth(float depthcurvevalue, int depthfactor, float itemcount)
 {
 int newdepth = (int)(depthcurvevalue * itemcount);
 this.transform.setsiblingindex(newdepth);
 }
 
 public override void setselectstate(bool iscenter)
 {
 if (image == null)
  image = getcomponent<image>();
 image.color = iscenter ? color.white : color.gray;
 }
}

导入以上6个脚本以后,我们开始制作效果,先从ngui开始,我们先在场景中,随便添加一个背景,然后,我们在uiroot下面添加一个空物体,取名scrollview,添加enhancescrollview.cs脚本,然后制作六个texture作为scrollview的子物体,添加dragenhanceview.cs脚本,nguienhanceitem.cs脚本,boxcollider组件。接着,我们在六个图片下方添加两个button,作为左右切换卡牌的按钮,在点击事件中,拖入scrollview,分别添加onbtnleftclick,onbtnrightclick方法。做完以上操作以后,场景大概是这样:

Unity实现游戏卡牌滚动效果

接着,我们选中scrollview,调整脚本参数:

Unity实现游戏卡牌滚动效果

scalecurve图像参数,设置为如下,左右循环都为pingpong:

Unity实现游戏卡牌滚动效果

positioncurve图像参数如下,左右循环都为loop:

Unity实现游戏卡牌滚动效果

depthcurve图像参数如下,左右循环都为loop:

Unity实现游戏卡牌滚动效果

然后把scrollview的子物体都拖到listenhanceitems这个公开数组下:

Unity实现游戏卡牌滚动效果

这样,我们就把配置工作都做好了,运行游戏:

Unity实现游戏卡牌滚动效果

可以看到,效果还不错,左右滑动或者点击切换按钮,就能实现切换卡牌的功能。

接着,我们看一下ugui的实现,ugui的ui布局基本和ngui保持一致,所不同的是scrollview的子物体添加的脚本不一样,所需要的脚本及组件如下图所示:

Unity实现游戏卡牌滚动效果

然后,还有需要注意的一点是,在scrollview上的参数配置上,我们需要把inputtype这个属性调整为ugui input

Unity实现游戏卡牌滚动效果

曲线设置和子物体数组设置和ngui一样,这里就不再重复了,配置完这些操作以后,运行,ugui也能实现一样的卡牌滚动效果:

Unity实现游戏卡牌滚动效果

以上,感谢github。

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。

原文链接:https://blog.csdn.net/OneWord233/article/details/84136424

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