dxsamples 4.2.0-1 / usr / share / dx / samples / scripts / Streakline

    // Import a series field
series = Import("seriesdata","series","dx");
    // Create a camera
camera = AutoCamera(series,"off-diagonal");

    // Select the first field in the series
first = Select(series,0);
    // Use glyphs to show the direction of the vectors in the first field
glyphs = AutoGlyph(first,shape=3,scale = 0.3);
caption = Caption("first frame in series");
both = Collect(caption,glyphs);
Display(both,camera);

    // Select the second field in the series
second = Select(series,1);
    // Use glyphs to show the direction of the vectors in the second field
glyphs = AutoGlyph(second,shape=3,scale = 0.3);
caption = Caption("second frame in series");
both = Collect(caption,glyphs);
Display(both,camera);

    // Select the third field in the series
third = Select(series,2);
    // Use glyphs to show the direction of the vectors in the third field
glyphs = AutoGlyph(third,shape=3,scale = 0.3);
caption = Caption("third frame in series");
both = Collect(caption,glyphs);
Display(both,camera);

    // Create a set of starting points using the Sample module. By default,
    // there will be approximately 100
startingpoints = Sample(first);
    // Create streaklines using those starting points
streakline = Streakline(NULL,series,startingpoints);
caption = Caption("streakline of series");
both = Collect(caption,streakline);
Display(both,camera);

    // Now use the frame parameter to see the streaklines progress
streakline = Streakline(NULL,series,startingpoints,frame=0);
caption = Caption("frame = 0 (streaklines have not progressed yet)");
both = Collect(caption,streakline);
Display(both,camera);

streakline = Streakline(NULL,series,startingpoints,frame=1);
caption = Caption("frame = 1");
both = Collect(caption,streakline);
Display(both,camera);

streakline = Streakline(NULL,series,startingpoints,frame=2);
caption = Caption("frame = 2");
both = Collect(caption,streakline);
Display(both,camera);