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- Rearranged tests in ClassifyLine, making it slightly faster.

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SVN r170 (trunk)
This commit is contained in:
Randy Heit 2006-06-06 05:19:32 +00:00
parent cf0d73b128
commit 4ce1df4aeb
1 changed files with 30 additions and 17 deletions
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47
nodebuild.cpp
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@ -735,30 +735,43 @@ int FNodeBuilder::ClassifyLine (node_t &node, const FPrivSeg *seg, int &sidev1,
double s_num1 = (d_y1 - d_yv1) * d_dx - (d_x1 - d_xv1) * d_dy; double s_num1 = (d_y1 - d_yv1) * d_dx - (d_x1 - d_xv1) * d_dy;
double s_num2 = (d_y1 - d_yv2) * d_dx - (d_x1 - d_xv2) * d_dy; double s_num2 = (d_y1 - d_yv2) * d_dx - (d_x1 - d_xv2) * d_dy;
if (s_num1 <= -FAR_ENOUGH && s_num2 <= -FAR_ENOUGH) int near = 0;
if (s_num1 <= -FAR_ENOUGH)
{ {
sidev1 = sidev2 = 1; if (s_num2 <= -FAR_ENOUGH)
return 1; {
sidev1 = sidev2 = 1;
return 1;
}
if (s_num2 >= FAR_ENOUGH)
{
sidev1 = 1;
sidev2 = -1;
return -1;
}
near = 2;
} }
if (s_num1 >= FAR_ENOUGH && s_num2 >= FAR_ENOUGH) else if (s_num1 >= FAR_ENOUGH)
{ {
sidev1 = sidev2 = -1; if (s_num2 >= FAR_ENOUGH)
return 0; {
sidev1 = sidev2 = -1;
return 0;
}
if (s_num2 <= -FAR_ENOUGH)
{
sidev1 = -1;
sidev2 = 1;
return -1;
}
near = 2;
} }
if (s_num1 <= -FAR_ENOUGH && s_num2 >= FAR_ENOUGH) else
{ {
sidev1 = 1; near = 1 | ((fabs(s_num2) < FAR_ENOUGH) << 1);
sidev2 = -1;
return -1;
}
if (s_num1 >= FAR_ENOUGH && s_num2 <= -FAR_ENOUGH)
{
sidev1 = -1;
sidev2 = 1;
return -1;
} }
int near = (fabs(s_num1) < FAR_ENOUGH) | ((fabs(s_num2) < FAR_ENOUGH) << 1);
if (near) if (near)
{ {
double l = 1.0 / (d_dx*d_dx + d_dy*d_dy); double l = 1.0 / (d_dx*d_dx + d_dy*d_dy);