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+#N canvas 280 56 664 282 10;
+#X text 413 215 see also:;
+#X text 597 12 gridflow;
+#X text 24 15 @perspective;
+#X text 153 15 transforms a dim[a... \, b] grid into a dim[a... \,
+b-1] grid. there is a projection plane perpendicular to the last axis
+and whose position is given by the creation argument. each vector's
+length is adjusted so that it lies onto that plane. then the last dimension
+of each vector is dropped;
+#X obj 30 147 #pack 3;
+#X floatatom 75 102 5 0 0 0 - - -;
+#X obj 77 120 max 1;
+#X floatatom 12 115 5 0 0 0 - - -;
+#X floatatom 52 77 5 0 0 0 - - -;
+#X obj 30 210 #print;
+#X obj 269 210 #print;
+#X obj 269 173 #perspective;
+#X obj 487 214 #redim;
+#X obj 540 214 #ravel;
+#X connect 4 0 9 0;
+#X connect 4 0 11 0;
+#X connect 5 0 6 0;
+#X connect 6 0 4 2;
+#X connect 7 0 4 0;
+#X connect 8 0 4 1;
+#X connect 11 0 10 0;