1 files changed, 94 insertions, 0 deletions
diff --git a/externals/gridflow/pd_help/@foldinnerouter.pd b/externals/gridflow/pd_help/@foldinnerouter.pd
new file mode 100644
index 00000000..46f2dc6d
--- /dev/null
+++ b/externals/gridflow/pd_help/@foldinnerouter.pd
@@ -0,0 +1,94 @@
+#N canvas 63 0 747 645 10;
+#X obj 18 34 bng 15 250 50 0 empty empty empty 0 -6 0 8 -233017 -1
+-1;
+#X obj 18 233 @export;
+#X obj 18 96 @in;
+#X text 18 10 @fold \, @inner \, @outer;
+#X obj 18 264 print value;
+#X obj 18 137 @fold + 0;
+#X obj 18 160 @fold + 0;
+#X obj 18 184 @fold + 0;
+#X text 114 133 treats the grid as a grid of one- dimensional grids
+such that the same operation (here addition) will be performed on all
+its elements together with the base value. the results are combined
+back. each @fold operation removes a dimension. syntax: @fold <two-input
+operation> <starting value>;
+#X obj 19 309 bng 15 250 50 0 empty empty empty 0 -6 0 8 -233017 -1
+-1;
+#X obj 171 402 @ * 128;
+#X obj 19 400 spigot;
+#X obj 100 400 spigot;
+#X obj 67 400 == 0;
+#X obj 67 309 tgl 15 0 empty empty empty 0 -6 0 8 -233017 -1 -1 1 1
+;
+#X obj 19 432 @outer +;
+#X obj 100 431 @outer ^;
+#X obj 100 451 @ * 2;
+#X text 171 448 @outer does the same two-input operation between every
+possible pair of the left-side grid and the right side grid. @inner
+treats both input grids like @fold does \, then does a @outer on the
+other dimensions \, such that every two-input operation is like a @fold.
+this is a very powerful operation that can be used to do rotations
+\, rgb->yuv \, color conversions \, etc.;
+#X text 88 310 select pattern;
+#X text 17 566 combine channelless picture with gamma factors (r \,
+g \, b);
+#X obj 19 379 @import ( 128 );
+#X obj 19 359 until;
+#X msg 19 338 128;
+#X obj 60 359 float 1;
+#X obj 115 359 + 1;
+#X obj 19 525 @outer gamma;
+#X obj 171 360 until;
+#X obj 212 360 float 1;
+#X obj 267 360 + 1;
+#X msg 171 339 4;
+#X obj 171 381 @import ( 3 );
+#X text 665 16 gridflow;
+#X text 19 598 see also:;
+#X obj 87 603 @scan;
+#X obj 129 603 @join;
+#X obj 171 603 @finished;
+#X obj 241 603 @cast;
+#X obj 283 603 @ravel;
+#X obj 331 603 @grade;
+#X obj 380 603 @perspective;
+#X msg 41 76 open bluemarble.jpg;
+#X obj 18 55 fork;
+#X obj 19 547 @out window;
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+#X connect 42 1 41 0;