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Painter20 dasher

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git-svn-id: svn://ultimatepp.org/upp/trunk@840 f0d560ea-af0d-0410-9eb7-867de7ffcac7
This commit is contained in:
cxl 2009-02-07 13:35:31 +00:00
parent 68c2a1caaa
commit 068030de69
13 changed files with 231 additions and 505 deletions
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62
uppdev/ScanLine/Dasher.cpp Normal file
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#include "ScanLine.h"
void Dasher::Put(const Pointf& p)
{
if(flag)
PutLine(p);
else
PutMove(p);
}
void Dasher::Move(const Pointf& p)
{
PutMove(p);
p0 = p;
}
void Dasher::Line(const Pointf& p)
{
if(pattern.GetCount() == 0) {
PutLine(p);
return;
}
Pointf v = p - p0;
double len = Length(v);
double pos = 0;
while(pos + rem < len) {
pos += rem;
Put(pos / len * v + p0);
flag = !flag;
rem = pattern[patterni];
patterni = (patterni + 1) % pattern.GetCount();
}
rem -= len - pos;
Put(p);
p0 = p;
}
Dasher::Dasher(double width, const Vector<double>& p, double distance)
{
pattern.SetCount(p.GetCount());
double sum = 0;
for(int i = 0; i < p.GetCount(); i++)
sum += (pattern[i] = p[i] * width);
if(sum == 0) {
pattern.Clear();
return;
}
distance -= int(distance / sum) * sum;
patterni = 0;
flag = false;
for(;;) {
rem = pattern[patterni];
patterni = (patterni + 1) % pattern.GetCount();
flag = !flag;
if(rem > distance) {
rem -= distance;
break;
}
distance -= rem;
}
p0 = Pointf(0, 0);
}