[Sommaire] [Imprimer]

   1  /*
   2      DynAPI Distribution
   3      Glide Animation Extension
   4  
   5      The DynAPI Distribution is distributed under the terms of the GNU LGPL license.
   6  
   7      requires: dynapi.fx.Thread
   8  */
   9  
  10  function GlideAnimation(x1,y1,x2,y2,angleinc,startSpeed,endSpeed) {
  11      if (x2==null) x2 = x1;
  12      if (y2==null) y2 = y1;
  13          
  14      var normAngle = dynapi.functions.getNormalizedAngle(x1,y1,x2,y2);
  15      var distx = x2-x1;
  16      var disty = y2-y1;
  17      var distance = Math.sqrt(Math.pow(distx,2) + Math.pow(disty,2));
  18      angleinc = (angleinc==null)? 7 : Math.abs(angleinc);
  19      
  20      // a terrible mess but it works
  21      var r = 1;
  22      if (startSpeed == "fast") {
  23          var centerX = x1;
  24          var centerY = y1;
  25          var centerX2 = x2;
  26          var centerY2 = y2;
  27          startAngle = 0;
  28          endAngle = 90;
  29          if (endSpeed=="fast") distance = distance/2;
  30      }
  31      else {
  32          startAngle = -90;
  33          endAngle = 0;
  34          if (endSpeed == "fast") {
  35              var centerX = x1+distx;
  36              var centerY = y1+disty;
  37          }
  38          else {  // default slow,slow
  39              var centerX2 = x2-distx/2;
  40              var centerY2 = y2-disty/2;
  41              distance = distance/2;
  42              var centerX = x1+distx/2;
  43              var centerY = y1+disty/2;
  44              r = -1;
  45          }
  46      }
  47  
  48      var i,d,x,y,dx,dy,path=[];
  49      for (var a=startAngle; a<endAngle; a+=angleinc) {
  50          i = path.length;
  51          d = distance*Math.sin(a*Math.PI/180);
  52          path[i] = Math.round(centerX + d*Math.cos(normAngle));
  53          path[i+1] = Math.round(centerY - d*Math.sin(normAngle));
  54      }
  55      if (startSpeed==endSpeed) {
  56          for (var a=endAngle; a<endAngle+90; a+=angleinc) {
  57              i = path.length;
  58              d = distance*Math.sin(a*Math.PI/180);
  59              path[i] = Math.round(centerX2 - r*d*Math.cos(normAngle));
  60              path[i+1] = Math.round(centerY2 + r*d*Math.sin(normAngle));
  61          }
  62      }
  63      
  64      var l = path.length;
  65      if (path[l-2] != x2 || path[l-1]!=y2) {
  66          path[l] = x2;
  67          path[l+1] = y2;
  68      }
  69      
  70      return path;
  71  };
  72  
  73  DynLayer.prototype.glideStop = function () {
  74      if (this._thread) this._thread.stop();
  75  };
  76  DynLayer.prototype.glideTo = function(x2,y2,angleinc,ms,startSpeed,endSpeed) {
  77      if (this.x!=x2 || this.y!=y2) {
  78          if (!this._thread) this._thread = new Thread(this);
  79          if (ms) this._thread.interval = ms;
  80          this._thread.play(GlideAnimation(this.x,this.y,x2,y2,angleinc,startSpeed,endSpeed) );
  81      }
  82  };