Fix frame distribution in view_step_manual() - #525
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Two issues caused frames to be distributed unequally across pauses and transitions, making wrap=FALSE animations zoom back and wrap=TRUE animations spend more time pausing than transitioning. Issue 1 — setup_params: an unnecessary phase for pause_first=FALSE The phase vectors were built by prepending a zero-pause slot and appending a zero-step slot, then conditionally zeroing elements: pause_length <- c(0, pause_length) # e.g. c(0, 1, 1) step_length <- c(step_length, 0) # e.g. c(1, 1, 0) if (!wrap) pause_length[last] <- 0 # e.g. c(0, 1, 0) for wrap=FALSE For wrap=FALSE this made no difference. It left a dead (0, 0) trailing phase; for wrap=TRUE it left a live (1, 0) trailing phase that allocated frames to a w1 pause that should not exist (the gif loop provides that continuity). Fix: drop the append entirely and trim the last pause in one step: pause_length <- c(0, pause_length[-length(pause_length)]) The behaviour becomes: wrap=FALSE: pause=c(0,1) step=c(1,0) — transition then freeze wrap=TRUE: pause=c(0,1) step=c(1,1) — transition, pause, return Bug 2 — train: nframes inflated by 1 for wrap=TRUE if (params$wrap) nframes <- nframes + 1 This made distribute_frames divide one extra frame across all phases, which in practice biased allocation toward pauses. Wrap is already handled by padding params$windows with the first window row; the inflated nframes was not needed and is removed. Adds tests for all four wrap/pause_first combinations covering both the phase structure produced by setup_params and the resulting frame allocation from distribute_frames. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Removes redundant nesting of if statements
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Fixes #499.
Logic in view_step_manual was allocating extra transitions for
wrap = FALSE. More detail in the commit.