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Improve renderSegment

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This commit is contained in:
muddmaker
2014-12-22 14:50:44 -08:00
parent 640da48368
commit 637908ab43
2 changed files with 11 additions and 22 deletions
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src/modules/math/BezierCurve.cpp
+9 -22
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@@ -195,28 +195,15 @@ vector<Vector> BezierCurve::renderSegment(double start, double end, size_t accur
}
else if (start < end)
{
if (start > 0 && start < 1)
{
for (size_t i = 0; i < vertices.size(); ++i)
{
if ((double)i / vertices.size() > start)
{
vertices.erase(vertices.begin(), vertices.begin() + i - 1);
break;
}
}
}
if (end < 1 && end > 0)
{
for (size_t i = vertices.size(); i > 0; --i)
{
if ((double)(i - 1) / vertices.size() < end)
{
vertices.erase(vertices.begin() + i, vertices.end());
break;
}
}
}
size_t start_idx = size_t(start * vertices.size());
size_t end_idx = size_t(end * vertices.size() + 0.5);
return std::vector<Vector>(vertices.begin() + start_idx, vertices.begin() + end_idx);
}
else if (end > start)
{
size_t start_idx = size_t(end * vertices.size() + 0.5);
size_t end_idx = size_t(start * vertices.size());
return std::vector<Vector>(vertices.begin() + start_idx, vertices.begin() + end_idx);
}
return vertices;
}