http://imagej.273.s1.nabble.com/Macro-for-polyline-tool-with-constant-length-of-segments-tp5010647p5010668.html
> On Nov 26, 2014, at 3:43 PM, Jeremias Brand <
[hidden email]> wrote:
>> Hi,
>>
>> I am working on a macro that allows me to draw a segmented line and then measures all the angles between the segments.
>> Measuring the angles works fine, but I also need to have segments of equal length to assure repeatability. I am working of this macro for the polygon:
>>
http://imagej.nih.gov/ij/macros/tools/PolygonTool.txt <mailto:
[hidden email]>
>> How can I fix the length of the segments? I have figured out how to terminate the first segment at a specific length, but I do not know how to continue the next segment form that point onward.
> The following macro tool creates segmented lines with equal length segments. Double click on the tool icon to set the segment length (the default is 80). Click in the box at the starting point, right-click, alt-click or control-click to finalize the polyline.
>
> -wayne
>
>
> var segmentLength = 80;
>
> macro "Polyline Tool -C00bB12Pf6b21213792e0" {
> toolName = IJ.getToolName();
> size = 6/getZoom;
> x = newArray(2000);
> y = newArray(2000);
> getCursorLoc(x2, y2, z2, flags);
> x[0] = x2; y[0] = y2;
> x[1] = x2; y[1] = y2;
> n = 2;
> setOption("DisablePopupMenu", true);
> Overlay.drawRect(x[0]-size, y[0]-size, size*2, size*2);
> Overlay.show;
> while (flags&20!=0) // left and right click
> getCursorLoc(x2, y2, z2, flags);
> while (true) {
> getCursorLoc(x2, y2, z2, flags);
> if (flags&20!=0) {
> modKey = flags&14!=0; //right-click, control or alt
> while (flags&16!=0)
> getCursorLoc(x2, y2, z2, flags);
> inBox = x2>x[0]-size&&x2<x[0]+size&&y2>y[0]-size&&y2<y[0]+size;
> if (inBox || modKey) {
> if (inBox)
> makeSelection("polyline", x, y, n-1);
> else
> makeSelection("polyline", x, y, n);
> Overlay.removeSelection(Overlay.size-1);
> setOption("DisablePopupMenu", false);
> exit;
> }
> dx = x2 - x[n-2];
> dy = y2 - y[n-2];
> length = sqrt(dx*dx+dy*dy);
> dx = dx/length;
> dy = dy/length;
> x[n-1] = x[n-2] + dx*segmentLength;
> y[n-1] = y[n-2] + dy*segmentLength;
> n++;
> }
> x[n-1] = x2;
> y[n-1] = y2;
> makeSelection("freeline", x, y, n);
> if (toolName!=IJ.getToolName()) {
> run("Select None");
> Overlay.removeSelection(Overlay.size-1);
> exit;
> }
> wait(10);
> }
> }
>
> macro 'Polyline Tool Options...' {
> segmentLength = getNumber("Segment Length (pixels):", segmentLength);
> }
>
>
>> Here is my code so far:
>> macro "Polygon Tool -C00bB12P51f1f2b6b7eafb1b151451" {
>> requires("1.45n");
>> toolName = IJ.getToolName();
>> size = 6/getZoom;
>> x = newArray(2000);
>> y = newArray(2000);
>> getCursorLoc(x2, y2, z2, flags);
>> x[0] = x2; y[0] = y2;
>> x[1] = x2; y[1] = y2;
>> n = 2;
>> setOption("DisablePopupMenu", true);
>> Overlay.drawRect(x[0]-size, y[0]-size, size*2, size*2);
>> Overlay.show;
>> while (flags&20!=0) // left and right click
>> getCursorLoc(x2, y2, z2, flags);
>> while (true) {
>> getCursorLoc(x2, y2, z2, flags);
>> if (flags&20!=0) {
>> modKey = flags&14!=0; //right-click, control or alt
>> while (flags&16!=0)
>> getCursorLoc(x2, y2, z2, flags);
>> if (modKey) {
>> makeSelection("polyline", x, y, n);
>> Overlay.removeSelection(Overlay.size-1);
>> setOption("DisablePopupMenu", false);
>> exit;
>> }
>> n++;
>> }
>> run("Measure");
>> length = getResult('Length', nResults-1);
>> if (length>=200) {
>> exit;
>> }
>> x[n-1] = x2;
>> y[n-1] = y2;
>> makeSelection("freeline", x, y, n);
>> wait(10);
>> }
>> }
>>
>> Please forgive me if this is a very amateur question. I just started writing macros. Any help would really be appreciated!
>>
>> Cheers,
>> Jeremias
>>
>>
>> --
>> *****************************
>> Jeremias Brand
>> University of Basel
>> Zoological Institute, Evolutionary Biology
>> Vesalgasse 1
>> 4051 Basel
>> Switzerland
>>
>>
http://evolution.unibas.ch/scharer>>
>>
>> --
>> *****************************
>> Jeremias Brand
>> University of Basel
>> Zoological Institute, Evolutionary Biology
>> Vesalgasse 1
>> 4051 Basel
>> Switzerland
>>
>>
http://evolution.unibas.ch/scharer> --
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