A.8 ‘t8.geo’

/********************************************************************* 
 *
 *  Gmsh tutorial 8
 * 
 *  Post-processing, scripting, animations, options
 *
 *********************************************************************/

// We first include `t1.geo' as well as some post-processing views:

Include "t1.geo" ;
Include "view1.pos" ;
Include "view1.pos" ;
Include "view4.pos" ;

// We then set some general options:

General.Trackball = 0 ;
General.RotationX = 0 ;
General.RotationY = 0 ;
General.RotationZ = 0 ;
General.Color.Background = White ;
General.Color.Foreground = Black ;
General.Color.Text = Black ;
General.Orthographic = 0 ;
General.Axes = 0 ;
General.SmallAxes = 0 ;

// We also set some options for each post-processing view:

v0 = PostProcessing.NbViews-4;
v1 = v0+1;
v2 = v0+2;
v3 = v0+3;

View[v0].IntervalsType = 2 ;
View[v0].OffsetZ = 0.05 ;
View[v0].RaiseZ = 0 ;
View[v0].Light = 1 ;
View[v0].ShowScale = 0;
View[v0].SmoothNormals = 1;

View[v1].IntervalsType = 1 ;
View[v1].ColorTable = { Green, Blue } ;
View[v1].NbIso = 10 ;
View[v1].ShowScale = 0;

View[v2].Name = "Test..." ;
View[v2].Axes = 1;
View[v2].Color.Axes = Black;
View[v2].IntervalsType = 2 ;
View[v2].Type = 2;
View[v2].IntervalsType = 2 ;
View[v2].AutoPosition = 0;
View[v2].PositionX = 85;
View[v2].PositionY = 50;
View[v2].Width = 200;
View[v2].Height = 130;

View[v3].Visible = 0;

// We then loop from 1 to 255 with a step of 1. (To use a different
// step, just add a third argument in the list. For example, `For num
// In {0.5:1.5:0.1}' would increment num from 0.5 to 1.5 with a step
// of 0.1.)

t = 0 ;

//For num In {1:1}
For num In {1:255}

  View[v0].TimeStep = t ;
  View[v1].TimeStep = t ;
  View[v2].TimeStep = t ;
  View[v3].TimeStep = t ;

  t = (View[v0].TimeStep < View[v0].NbTimeStep-1) ? t+1 : 0 ;
  
  View[v0].RaiseZ += 0.01/View[v0].Max * t ;

  If (num == 3)
    // We want to create 320x240 frames when num == 3:
    General.GraphicsWidth = 320 ; 
    General.GraphicsHeight = 240 ;
  EndIf

  // It is possible to nest loops:
  For num2 In {1:50}

    General.RotationX += 10 ;
    General.RotationY = General.RotationX / 3 ;
    General.RotationZ += 0.1 ;
 
    Sleep 0.01; // sleep for 0.01 second
    Draw; // draw the scene

    If (num == 3)
      // The `Print' command saves the graphical window; the `Sprintf'
      // function permits to create the file names on the fly:
      Print Sprintf("t8-%02g.gif", num2);
      Print Sprintf("t8-%02g.jpg", num2);
    EndIf

  EndFor

  If(num == 3)
    // Here we could make a system call to generate a movie. For example,

    // with whirlgif:
    //
    // System "whirlgif -minimize -loop -o t8.gif t8-*.gif";

    // with mpeg_encode:
    //
    // System "mpeg_encode t8.par";

    // with mencoder:
    //
    // System "mencoder 'mf://*.jpg' -mf fps=5 -o t8.mpg -ovc lavc
    //         -lavcopts vcodec=mpeg1video:vhq";
    // System "mencoder 'mf://*.jpg' -mf fps=5 -o t8.mpg -ovc lavc
    //         -lavcopts vcodec=mpeg4:vhq";

    // with ffmpeg:
    //
    // System "ffmpeg -hq -r 5 -b 800 -vcodec mpeg1video
    //         -i t8-%02d.jpg t8.mpg"
    // System "ffmpeg -hq -r 5 -b 800 -i t8-%02d.jpg t8.asf"
  EndIf

EndFor