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tylerjenningsw
f263a32ab7
FxHost::param_at mapped the requested layer time to comp time, and EvalCtx::value mapped it back. Under a fractional stretch (33.3 %, 133.33 %) that round trip truncates a tick early, so a Hold key at 0.5 s read its previous value at the step starting there: a Birth Rate cut to 0 at 0.5 s bore one more step of particles (six). EvalCtx::value_at_layer_time reads the keyframes at the given layer time exactly, and still runs an expression at the comp time. EvalCtx::value now uses it, and param_at reads through it. EffectHost::param_is_static says when a parameter has no keyframes and no expression. CC Particle World then skips sampling its Birth Rate at every step, since it's the same throughout.