Dashed Line - Thickness from Small to Big o vice versa

Might be a bit late but this seems very easy to do. Consider these stroke settings.

Also i want to thank people for trying to help but this is turning to not what i want i tried doing some of the exmples, not counting the code ones cuz i dont know how and where the code works on PS. Also Illustrator didnt try that ither cuz i dont have that

Any how ... i kinda opted to go a diferent route on my desing and just use 3 simple lines that im going to show u

Once again i say thank for the people that tryind to help ... but i opted to go with this.

Regards ASilva

PS: How does one close the discusion ?

damn alll these replys are making me confused specialy the code ones ... dont understand squat of that ... anyway im gona try and do what i can using rectangle and circles shapes ... see to see if i can give it the effect i want.

O i might just do a huge dashed shape, then create a shape for the effect i want a do a cliping mask and see how it looks.

Any how thaks for trying to help guys

You can try this script. you need to set the sizes you want, and a starting selection for the height of the dashed lines and how long you want it. It would be best to do this on a separate layer then transform your results to fit.

var oldPref = app.preferences.rulerUnits;//stores old measurement preferences so that they can be reset when the script is done.
app.preferences.rulerUnits = Units.PIXELS;
var startingSize = 70//set starting size of dash
var minSize = 2//set minimum size of dash, just so they don't get too small
var dimStep = .95//set how much the dash decreases in size with each step
var dashSpace = 10//set space between dashes
var selArray = new Array();
var doc = activeDocument;
var selBounds = doc.selection.bounds;
var top = selBounds[1];
var bottom = selBounds[3];
var selW = doc.selection.bounds[2]-doc.selection.bounds[0];
var selH = doc.selection.bounds[3]-doc.selection.bounds[1];
var startD = doc.selection.bounds[0];
var endD = startD+startingSize;
var dashSize = startingSize
while (endD< selBounds[2] && dashSize> 1){
//for(var i=0;i<3;i++){
    selArray = new Array([startD,top],[endD,top],[endD,bottom],[startD,bottom]);
    doc.selection.select(selArray);
    fillForeground ();
    startD = endD + dashSpace;
    dashSize *=dimStep
    endD = startD + dashSize
    }
selArray = new Array([selBounds[0],top],[selBounds[2],top],[selBounds[2],bottom],[selBounds[0],bottom]);
doc.selection.select(selArray);
app.preferences.rulerUnits = oldPref;
function fillForeground(){
       var idFl = charIDToTypeID( "Fl  " );
        var desc2 = new ActionDescriptor();
        var idUsng = charIDToTypeID( "Usng" );
        var idFlCn = charIDToTypeID( "FlCn" );
        var idFrgC = charIDToTypeID( "FrgC" );
        desc2.putEnumerated( idUsng, idFlCn, idFrgC );
        var idOpct = charIDToTypeID( "Opct" );
        var idPrc = charIDToTypeID( "#Prc" );
        desc2.putUnitDouble( idOpct, idPrc, 100.000000 );
        var idMd = charIDToTypeID( "Md  " );
        var idBlnM = charIDToTypeID( "BlnM" );
        var idNrml = charIDToTypeID( "Nrml" );
        desc2.putEnumerated( idMd, idBlnM, idNrml );
    executeAction( idFl, desc2, DialogModes.NO );
    }

Here are my $0.02 If you know thickness of line then do the following - you can also record action after first step in case that you change mind about thickness:

1. Draw first dash using Rectangle tool.
2. With shape layer in the Layers panel selected Press Alt/Opt + Ctrl/Cmd + T what will enter free transform with copy.
3. Use arrow key -> to nudge shape into position, that should be copy of original or first shape created in step 1.
4. Confirm on Enter/Return.
5. Press Alt/Opt + Shift + Ctrl/Cmd + T as many times as needed what will create new dash every time and move it for the same increment as you did in step 3.

Ups, it appears that I didn't understand what is your problem, please ignore my answer although it can be used successfully with addition to change dash thickness in addition to move it in step 3. The next step would be to copy all layers and rotate them so you have from thin to thick.

You could stroke a path with a square Brush, with Roundness set to Fade in Shape Dynamics:

That is not possible with the current tools in PS. The only way I can see to work around this would be to write a script that creates rectangle shapes in a line and reduced the horizontal width with each placement.