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Make feet and inches show fractions of an inch, rounded to nearest 1/64 

Taking care to round appropriately so you don't end up with things like
35.999 coming out as 2' 12" and similar.
pull/1003/head
Tom Sutcliffe 2021-08-13 13:09:13 +01:00 committed by phkahler
parent 2fb6119de8
commit 41e3668f89
1 changed files with 29 additions and 16 deletions
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45
src/solvespace.cpp
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@ -333,32 +333,45 @@ const char *SolveSpaceUI::UnitName() {
std::string SolveSpaceUI::MmToString(double v, bool editable) {
v /= MmPerUnit();
int feet = 0;
// The syntax 2' 6" for feet and inches is not something we can (currently)
// parse back from a string so if editable is true, we treat FEET_INCHES the
// same as INCHES and just return the unadorned decimal number of inches.
if(viewUnits == Unit::FEET_INCHES && !editable) {
// v is in inches at this point
feet = (int)(v / 12.0);
v = v - (feet * 12.0);
// v is now the remainder in inches
// Now convert v from inches to 64'ths of an inch, to make rounding easier.
v = floor((v + (1.0 / 128.0)) * 64.0);
int feet = (int)(v / (12.0 * 64.0));
v = v - (feet * 12.0 * 64.0);
// v is now the feet-less remainder in 1/64 inches
int inches = (int)(v / 64.0);
int numerator = (int)(v - ((double)inches * 64.0));
int denominator = 64;
// Divide down to smallest denominator where the numerator is still a whole number
while ((numerator != 0) && ((numerator & 1) == 0)) {
numerator /= 2;
denominator /= 2;
}
std::ostringstream str;
if(feet != 0) {
str << feet << "' ";
}
// For something like 0.5, show 1/2" rather than 0 1/2"
if(!(feet == 0 && inches == 0 && numerator != 0)) {
str << inches;
}
if(numerator != 0) {
str << " " << numerator << "/" << denominator;
}
str << "\"";
return str.str();
}
int digits = UnitDigitsAfterDecimal();
double minimum = 0.5 * pow(10,-digits);
while ((feet == 0) && (v < minimum) && (v > LENGTH_EPS)) {
while ((v < minimum) && (v > LENGTH_EPS)) {
digits++;
minimum *= 0.1;
}
if(viewUnits == Unit::FEET_INCHES && !editable) {
if(feet != 0) {
return ssprintf("%d' %.*f\"", feet, digits, v);
} else {
return ssprintf("%.*f\"", digits, v);
}
} else {
return ssprintf("%.*f", digits, v);
}
return ssprintf("%.*f", digits, v);
}
static const char *DimToString(int dim) {
switch(dim) {