Unity相机移动之屏幕边缘检测

本文实例为大家分享了unity相机移动之屏幕边缘检测的具体代码，供大家参考，具体内容如下

功能：

类似lol 红警 相机移动方式。

鼠标移动到屏幕边缘，相机随之移动。

当然还有可以加亿一点点细节，比如鼠标指针变化，滚轮推进拉远视野，中键平移视野等。（没做）。 

效果图：

这里做了可视化数据（可以看到限定的屏幕距离），线框内为检测的距离。

代码：

复制脚本，直接挂载相机上就可以用。

using unityengine;
 
/// <summary>
/// 相机边缘移动
/// </summary>
[requirecomponent(typeof(camera))]
public class camerascreenedgemove :monobehaviour
{
 
 
 [header("使用边缘移动")]
 public bool isusemoveonscreenedge = true;
 
 /// <summary>
 /// 打开调试
 /// </summary>
 public bool isdebugscreenedge = true;
 
 //移动速度
 public float movespeed = 1f;
 
 /// <summary>
 /// 距离屏幕边缘多远就开始移动相机
 /// </summary>
 public int screenedgesize = 20;
 
 private bool moveup;
 private bool movedown;
 private bool moveright;
 private bool moveleft;
 
 private rect rigthrect;
 private rect uprect;
 private rect downrect;
 private rect leftrect;
 
 private material mat;
 private vector3 dir = vector3.zero;
 
 private void start()
 {
 createlinematerial();
 }
 
 private void update()
 {
 if (isusemoveonscreenedge)
 {
  uprect = new rect(1f, screen.height - screenedgesize, screen.width, screenedgesize);
  downrect = new rect(1f, 1f, screen.width, screenedgesize);
 
  leftrect = new rect(1f, 1f, screenedgesize, screen.height);
  rigthrect = new rect(screen.width - screenedgesize, 1f, screenedgesize, screen.height);
 
 
  moveup = (uprect.contains(input.mouseposition));
  movedown = (downrect.contains(input.mouseposition));
 
  moveleft = (leftrect.contains(input.mouseposition));
  moveright = (rigthrect.contains(input.mouseposition));
 
  dir.z = moveup ? 1 : movedown ? -1 : 0;
  dir.x = moveleft ? -1 : moveright ? 1 : 0;
 
  transform.position = vector3.lerp(transform.position, transform.position + dir * movespeed,time.deltatime);
 
 }
 }
 
 
 void createlinematerial()
 {
 if (!mat)
 {
  shader shader = shader.find("hidden/internal-colored");
  mat = new material(shader);
  mat.hideflags = hideflags.hideanddontsave;
  mat.setint("_srcblend", (int)unityengine.rendering.blendmode.srcalpha);
  mat.setint("_dstblend", (int)unityengine.rendering.blendmode.oneminussrcalpha);
  mat.setint("_cull", (int)unityengine.rendering.cullmode.off);
  mat.setint("_zwrite", 0);
 }
 }
 
 void onpostrender()
 {
 if (isusemoveonscreenedge && isdebugscreenedge)
 {
  drawrect(uprect, moveup, color.cyan, color.red); 
  drawrect(downrect, movedown, color.green, color.red); 
  drawrect(leftrect, moveleft, color.yellow, color.red); 
  drawrect(rigthrect, moveright, color.blue, color.red); 
 }
 }
 
 private void drawrect(rect rect, bool ismouseenter, color normalcolor, color heighlightcolor)
 {
 if (ismouseenter)
 {
  drawscreenrect(rect, heighlightcolor);
 }
 else
 {
  drawscreenrect(rect, normalcolor);
 }
 }
 
 private void drawscreenrect(rect rect, color color)
 {
 gl.loadortho();
 gl.begin(gl.lines);
 {
  mat.setpass(0);
  gl.color(color);
  gl.vertex3(rect.xmin / screen.width, rect.ymin / screen.height, 0);
  gl.vertex3(rect.xmin / screen.width, rect.ymax / screen.height, 0);
 
  gl.vertex3(rect.xmin / screen.width, rect.ymax / screen.height, 0);
  gl.vertex3(rect.xmax / screen.width, rect.ymax / screen.height, 0);
 
  gl.vertex3(rect.xmax / screen.width, rect.ymax / screen.height, 0);
  gl.vertex3(rect.xmax / screen.width, rect.ymin / screen.height, 0);
 
  gl.vertex3(rect.xmax / screen.width, rect.ymin / screen.height, 0);
  gl.vertex3(rect.xmin / screen.width, rect.ymin / screen.height, 0);
  
 }
 gl.end();
 }
 
}

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。