7.3. Stage 3

7.3.1. Preparing the script

The script is a text document created in BBEdit that will automate the transformations you'll apply to the pictures. You can name it whatever you like; in this case, I called it scriptphare.txt. (Don't delete the .txt suffix, even when working on a Mac.)

p w3600

i w1800 h1800 f2 r0 p0 y60 v185 a0 b0.1 c0
i w1800 h1800 f2 r0 p0 y180 v=0 a=0 b=0 c=0
i w1800 h1800 f2 r0 p0 y300 v=0 a=0 b=0 c=0

v v0 b0  r1 y1 p1  r2 y2 p2

This script must be edited to include the size of the source pictures. On the first line, which corresponds to the output width of the panorama in pixels, enter the diameter of the circle, times two (1780 × 2 = 3560). In the next three lines—there is one for each picture—enter the measured diameter (1780) after each w and h. Don't change any of the rest of the code, and leave the last line as it is.

p w3560
i w1780 h1780 f2 r0 p0 y60 v185 a0 b0.1 c0
i w1780 h1780 f2 r0 p0 y180 v=0 a=0 b=0 c=0
i w1780 h1780 f2 r0 p0 y300 v=0 a=0 b=0 c=0
v v0 b0  r1 y1 p1  r2 y2 p2

To measure the reference points I use an HTML page composed of frames and JavaScript code that lets medirectly choose pairs of points. You can also get the coordinates of each point in Photoshop. If they are selected correctly, four pairs of points are enough for any two images.

This produces the following reference point coordinates:

Between a and b

c n0 N1 x1293 y1490 X505 Y1510
c n0 N1 x1385 y1169 X273 Y1215
c n0 N1 x1380 y983 X191 Y1018
c n0 N1 x1294 y937 X104 Y970

Between b and c

c n1 N2 x1183 y264 X499 Y230
c n1 N2 x1278 y209 X598 Y278
c n1 N2 x1554 y462 X510 Y556
c n1 N2 x1454 y918 X237 Y926

Between c and a

c n2 N0 x1447 y1216 X361 Y1201
c n2 N0 x1624 y1198 X525 Y1133
c n2 N0 x1537 y1348 X534 Y1268
c n2 N0 x1244 y1539 X523 Y1534

At this point, open the scriptphare.txt script in your text editor and paste the code into the script document below the existing lines in blue. Save the scriptphare.txt script and close it.

p w3500

i w1780  h1780  f2 r0 p0 y60 v185 a0
b0.1 c0
i w1780  h1780  f2 r0 p0 y180 v=0 a=0
b=0 c=0
i w1780  h1780  f2 r0 p0 y300 v=0 a=0
b=0 c=0

v v0 b0 r1 y1 p1 r2 y2 p2

c n0 N1 x1293 y1490 X505 Y1510
c n0 N1 x1385 y1169 X273 Y1215
c n0 N1 x1380 y983 X191 Y1018
c n0 N1 x1294 y937 X104 Y970
c n1 N2 x1183 y264 X499 Y230
c n1 N2 x1278 y209 X598 Y278
c n1 N2 x1554 y462 X510 Y556
c n1 N2 x1454 y918 X237 Y926
c n2 N0 x1447 y1216 X361 Y1201
c n2 N0 x1624 y1198 X525 Y1133
c n2 N0 x1537 y1348 X534 Y1268
c n2 N0 x1244 y1539 X523 Y1534