Use the cursor/keys to manipulate boundary radii and angle sums. Put the cursor on a boundary circle and press 'f', 'c', 'b' to have the boundary flatten, turn left, or turn right, respectively, at that circle. The 'x' key sets the boundary circle free from angle restrictions. Boundary circles with no angle constraint can have their radii adjusted up or down, 'u' or 'd'. Learn what you can about such boundary manipulations. act 0;cleanse;infile_read start.p;norm_scale -u 5;set_screen -a;color -c 100 a;disp -w -c -e b;set_disp_text -w -cf -e b; We begin with a small 'blob' of a circle packing. Using the keys 'f', 'c', 'b', 'x', 'u' and 'd', the user controls various boundary conditions --- boundary angle sum or adjustment in radius. The idea is simply to see how the packing responds; if you prescribe inconsistent angle prescriptions, the packing may degenerate to a point, then just start over. set_vlist z #XY;mark -cw -c vlist;set_vlist {c:(m).and.(b)};set_aim 1.0 vlist;repack;layout;norm_scale -u 5;set_screen -a;color -c 209 vlist;disp -wr; set_vlist z #XY;mark -cw -c vlist;set_vlist {c:(m).and.(b)};set_aim .5 vlist;repack;layout;norm_scale -u 5;set_screen -a;color -c 80 vlist;disp -wr; set_vlist z #XY;mark -cw -c vlist;set_vlist {c:(m).and.(b)};set_aim 1.5 vlist;repack;layout;norm_scale -u 5;set_screen -a;color -c 120 vlist;disp -wr; set_vlist z #XY;set_aim -.1 vlist;repack;layout;norm_scale -u 5;set_screen -a;color -c 100 vlist;disp -wr; set_vlist z #XY;mark -cw -c vlist;set_vlist {c:(m).and.(b)};adjust_rad 1.2 vlist;repack;layout;norm_scale -u 5;set_screen -a;disp -wr; set_vlist z #XY;mark -cw -c vlist;set_vlist {c:(m).and.(b)};adjust_rad .8 vlist;repack;layout;norm_scale -u 5;set_screen -a;disp -wr; NODECOUNT: 49 GEOMETRY: euclidean ALPHA/BETA/GAMMA: 11 0 1 FLOWERS: 1 3 23 10 8 24 2 6 20 27 13 25 19 29 20 3 4 11 29 38 26 11 4 5 18 8 10 31 30 18 5 3 41 15 34 28 6 3 42 21 10 23 7 4 13 36 37 22 13 8 7 18 15 41 24 1 10 4 18 9 4 26 38 40 32 26 10 7 4 8 1 23 6 21 31 4 11 6 35 20 29 3 26 30 35 12 4 17 16 38 19 14 13 7 2 27 47 36 7 22 25 2 14 4 12 19 25 22 39 15 6 18 32 34 5 41 8 18 16 4 38 12 17 40 38 17 3 28 40 16 12 18 6 26 32 15 8 4 30 26 19 6 12 38 29 2 25 14 12 20 5 11 35 27 2 29 11 21 6 10 6 42 43 44 31 10 22 6 13 7 37 39 14 25 13 23 2 6 10 1 24 2 1 8 41 25 5 2 13 22 14 19 2 26 7 11 3 38 9 32 18 30 11 27 6 20 35 33 47 13 2 20 28 3 5 34 40 17 29 6 11 20 2 19 38 3 11 30 6 11 26 18 4 31 35 11 31 8 4 10 21 44 45 33 35 30 4 32 6 26 9 40 34 15 18 26 33 6 47 27 35 31 45 46 47 34 5 15 32 40 28 5 15 35 6 20 11 30 31 33 27 20 36 4 37 7 13 47 49 37 3 39 22 7 36 38 8 3 29 19 12 16 40 9 26 3 39 2 14 22 37 40 7 28 34 32 9 38 16 17 28 41 3 24 8 15 5 42 2 43 21 6 43 2 44 21 42 44 3 45 31 21 43 45 3 46 33 31 44 46 3 48 47 33 45 47 7 36 13 27 33 46 48 49 36 48 2 49 47 46 49 2 36 47 48 RADII: 1.087860769e-01 8.306285885e-02 3.517599014e-02 9.132763249e-02 1.215607962e-01 8.190581564e-02 3.839155609e-02 1.383582301e-01 3.980001786e-02 1.389135245e-01 7.201425967e-02 1.559451130e-01 1.106718986e-01 1.412130155e-01 1.039957312e-01 4.954180444e-02 1.142076274e-01 9.959982245e-02 1.001074775e-01 5.999121956e-02 1.025539095e-01 7.569744804e-02 7.049593568e-02 8.551738271e-02 6.912121691e-02 9.153424672e-02 1.041512069e-01 1.366801808e-01 7.141142688e-02 1.026845003e-01 2.000267050e-01 8.041820356e-02 1.424579990e-01 7.508363150e-02 1.043950161e-01 1.169728009e-01 7.779828006e-02 1.142262609e-01 6.789997078e-02 1.028225470e-01 1.258171856e-01 4.775771748e-02 6.864539403e-02 1.556531052e-01 1.784082994e-01 1.412545311e-01 1.561700234e-01 1.141394093e-01 1.138540607e-01 CENTERS: 0.0000000000e+00 7.4626614765e-01 -2.6054412909e-02 -2.5219882153e-01 1.0343609757e-01 -2.8119803934e-02 -5.6962954008e-02 3.6205756749e-01 5.2259979094e-01 4.1277949550e-01 -3.2109279950e-01 7.2275056238e-01 -1.1807215599e-01 -5.5233677934e-01 1.0661182418e-01 5.2329927248e-01 2.6283867837e-01 7.4829218699e-02 -1.6766554632e-01 5.6393853841e-01 -0.0000000000e+00 0.0000000000e+00 4.1137923196e-01 -2.9033732517e-01 -1.4436711565e-01 -4.0561088308e-01 2.0971356473e-01 -5.0858927132e-01 2.9988646666e-01 3.7707904426e-01 4.0786731259e-01 -8.4880420509e-02 5.7114744438e-01 -7.2491917931e-02 1.1799305572e-01 2.8561355066e-01 1.5589092692e-01 -2.7334747233e-01 -6.5404716344e-02 -1.1466328805e-01 -4.0911051540e-01 5.6064481947e-01 -6.0819542488e-03 -5.3055386011e-01 -1.7725820619e-01 7.7312817221e-01 1.9358648478e-01 7.2958959809e-01 3.4883144370e-02 -3.9164991341e-01 1.3307434887e-01 9.5075399645e-02 -2.0577167066e-01 -1.9975062148e-01 6.1997150835e-01 1.7359933154e-01 6.5352482725e-02 -1.2767137724e-01 -4.6807299160e-02 1.6831141820e-01 -3.3267558749e-01 2.6787745439e-01 2.7330371161e-01 1.9459108174e-01 -4.1243483417e-01 -6.5190459142e-02 4.2050584446e-01 2.4471445743e-01 -1.7628199484e-01 6.7000655235e-03 -2.6669919202e-01 -5.9759258093e-01 -8.3312324701e-02 -6.6320531477e-01 2.4424091048e-01 -7.8070152054e-02 6.2247356849e-02 -6.5685241091e-01 4.0527082791e-01 6.7461805546e-02 3.5971873776e-01 5.9896657451e-01 -4.4959064207e-01 7.0540304739e-01 -5.5341236176e-01 6.5276527683e-01 -6.4050252807e-01 4.4606472119e-01 -6.7848927520e-01 1.1417011578e-01 -6.5935307482e-01 -2.0491941870e-01 -4.0791054767e-01 -3.6378420752e-01 -6.6039762589e-01 -4.6031122292e-01 -4.9654545314e-01 -6.1884666955e-01 END