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Bugfixes for looping helpers.
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common.scad
27
common.scad
@ -471,7 +471,7 @@ module shape_compare(eps=1/1024) {
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// variables, that means that only the NEXT phase can be used for iterative calculations.
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// Unfortunately, the NEXT phase runs *after* the RETVAL expression, which means that you need
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// to run the loop one extra time to return the final value. This tends to make the loop code
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// look rather ugly. The `looping()`, `loop_next()` and `loop_done()` functions
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// look rather ugly. The `looping()`, `loop_while()` and `loop_done()` functions
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// can make this somewhat more legible.
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// ```openscad
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// function flat_sum(l) = [
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@ -482,9 +482,9 @@ module shape_compare(eps=1/1024) {
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//
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// looping(state);
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//
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// state = loop_next(state, i < len(l)),
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// state = loop_while(state, i < len(l)),
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// total = total +
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// !looping(state) ? 0 :
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// loop_done(state) ? 0 :
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// let( x = l[i] )
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// is_list(x) ? flat_sum(x) : x,
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// i = i + 1
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@ -497,27 +497,28 @@ module shape_compare(eps=1/1024) {
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// Usage:
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// looping(state)
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// Description:
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// Returns true if the `state` value indicates the loop is still progressing.
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// Returns true if the `state` value indicates the current loop should continue.
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// This is useful when using C-style for loops to iteratively calculate a value.
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// Used with `loop_next()` and `loop_done()`. See [Looping Helpers](#looping-helpers) for an example.
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// Used with `loop_while()` and `loop_done()`. See [Looping Helpers](#5-looping-helpers) for an example.
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// Arguments:
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// state = The loop state value.
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function looping(state) = state<2;
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function looping(state) = state < 2;
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// Function: loop_next()
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// Function: loop_while()
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// Usage:
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// state = loop_next(state, continue)
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// state = loop_while(state, continue)
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// Description:
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// Given the current `state`, and a boolean `continue` that indicates if the loop should still be
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// continuing, returns the updated state value for the the next loop.
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// This is useful when using C-style for loops to iteratively calculate a value.
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// Used with `looping()` and `loop_done()`. See [Looping Helpers](#looping-helpers) for an example.
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// Used with `looping()` and `loop_done()`. See [Looping Helpers](#5-looping-helpers) for an example.
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// Arguments:
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// state = The loop state value.
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// continue = A boolean value indicating whether the current loop should progress.
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function loop_next(state, continue) =
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state>=1? 2 : (continue? 0 : 1);
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function loop_while(state, continue) =
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state > 0 ? 2 :
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continue ? 0 : 1;
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// Function: loop_done()
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@ -526,10 +527,10 @@ function loop_next(state, continue) =
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// Description:
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// Returns true if the `state` value indicates the loop is finishing.
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// This is useful when using C-style for loops to iteratively calculate a value.
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// Used with `looping()` and `loop_next()`. See [Looping Helpers](#looping-helpers) for an example.
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// Used with `looping()` and `loop_while()`. See [Looping Helpers](#5-looping-helpers) for an example.
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// Arguments:
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// state = The loop state value.
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function loop_done(state) = state==1;
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function loop_done(state) = state > 0;
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// vim: expandtab tabstop=4 shiftwidth=4 softtabstop=4 nowrap
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@ -8,7 +8,7 @@
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//////////////////////////////////////////////////////////////////////
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BOSL_VERSION = [2,0,442];
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BOSL_VERSION = [2,0,443];
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// Section: BOSL Library Version Functions
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