Make sure we never output numbers in scientific notation

Converting NSNumber to a string raises the possibility of outputing a
number like 2.2e-8, as it essentially uses the %g format specifier.
This then cannot be parsed.

Since there is no built-in specifier for outputing floats with variable
precision (ie: removing any trailing zeros), I cooked up a function to
do just that.

Currently set the maximum precision at 4dp (our normal grid layout only
makes use of 2dp).

1 files changed, 8 insertions, 1 deletions

diff --git a/tikzit/src/common/util.h b/tikzit/src/common/util.h
index f527820..b34f25d 100644
--- a/tikzit/src/common/util.h
+++ b/tikzit/src/common/util.h
@@ -191,4 +191,11 @@ NSString *alphaHex(unsigned short sh);
 
 const char *find_start_of_nth_line (const char * string, int line);
 
-// vi:ft=objc:noet:ts=4:sts=4:sw=4
+/*!
+ @brief      Formats a CGFloat as a string, removing trailing zeros
+ @detail     Unlike formatting an NSNumber, or using %g, it will never
+             produce scientific notation (like "2.00e2").  Unlike %f,
+             it will not include unnecessary trailing zeros.
+ */
+NSString *formatFloat(CGFloat f, int maxdps);
+