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UI: fix a precision issue with float field step size. 

Fix a precision issue when stepping down from 1 to 0 via the left
decrement button and step 100 results in a small nonzero value.

The reason is that 0.01 can't be precisely represented in binary
and converting to double before multiplication reveals this.

Ref D13753
This commit is contained in:
Alexander Gavrilov 2022-01-18 12:00:09 +03:00
parent 6a8ad00bcc
commit 6952228386
1 changed files with 1 additions and 1 deletions
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2
source/blender/editors/interface/interface_handlers.c
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@ -5484,7 +5484,7 @@ static int ui_do_but_NUM(
log10f(number_but->step_size));
}
else {
value_step = (double)number_but->step_size * UI_PRECISION_FLOAT_SCALE;
value_step = (double)(number_but->step_size * UI_PRECISION_FLOAT_SCALE);
}
BLI_assert(value_step > 0.0f);
const double value_test = (but->drawflag & UI_BUT_ACTIVE_LEFT) ?