mirror of
https://github.com/ZDoom/gzdoom-gles.git
synced 2024-12-15 06:41:27 +00:00
90b8dbb096
Like everything else related to doing standard math with SSE2 vs. x87, there's nothing to be gained here with anything but first generation SSE2 systems which are irrelevant these days. Taking 'thespir2.wad' from https://forum.zdoom.org/viewtopic.php?f=1&t=10655 the SSE2 version is reproducably ~3% slower than the x87 version on my Core i7, which quite closely mirrors all my previous tests since 2007. Overall this just looks like an optimization not worth doing.
136 lines
2.3 KiB
C++
136 lines
2.3 KiB
C++
#include "doomtype.h"
|
|
#include "nodebuild.h"
|
|
|
|
#define FAR_ENOUGH 17179869184.f // 4<<32
|
|
|
|
int FNodeBuilder::ClassifyLine(node_t &node, const FPrivVert *v1, const FPrivVert *v2, int sidev[2])
|
|
{
|
|
double d_x1 = double(node.x);
|
|
double d_y1 = double(node.y);
|
|
double d_dx = double(node.dx);
|
|
double d_dy = double(node.dy);
|
|
double d_xv1 = double(v1->x);
|
|
double d_xv2 = double(v2->x);
|
|
double d_yv1 = double(v1->y);
|
|
double d_yv2 = double(v2->y);
|
|
|
|
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;
|
|
|
|
int nears = 0;
|
|
|
|
if (s_num1 <= -FAR_ENOUGH)
|
|
{
|
|
if (s_num2 <= -FAR_ENOUGH)
|
|
{
|
|
sidev[0] = sidev[1] = 1;
|
|
return 1;
|
|
}
|
|
if (s_num2 >= FAR_ENOUGH)
|
|
{
|
|
sidev[0] = 1;
|
|
sidev[1] = -1;
|
|
return -1;
|
|
}
|
|
nears = 1;
|
|
}
|
|
else if (s_num1 >= FAR_ENOUGH)
|
|
{
|
|
if (s_num2 >= FAR_ENOUGH)
|
|
{
|
|
sidev[0] = sidev[1] = -1;
|
|
return 0;
|
|
}
|
|
if (s_num2 <= -FAR_ENOUGH)
|
|
{
|
|
sidev[0] = -1;
|
|
sidev[1] = 1;
|
|
return -1;
|
|
}
|
|
nears = 1;
|
|
}
|
|
else
|
|
{
|
|
nears = 2 | int(fabs(s_num2) < FAR_ENOUGH);
|
|
}
|
|
|
|
if (nears)
|
|
{
|
|
double l = 1.f / (d_dx*d_dx + d_dy*d_dy);
|
|
if (nears & 2)
|
|
{
|
|
double dist = s_num1 * s_num1 * l;
|
|
if (dist < SIDE_EPSILON*SIDE_EPSILON)
|
|
{
|
|
sidev[0] = 0;
|
|
}
|
|
else
|
|
{
|
|
sidev[0] = s_num1 > 0.0 ? -1 : 1;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
sidev[0] = s_num1 > 0.0 ? -1 : 1;
|
|
}
|
|
if (nears & 1)
|
|
{
|
|
double dist = s_num2 * s_num2 * l;
|
|
if (dist < SIDE_EPSILON*SIDE_EPSILON)
|
|
{
|
|
sidev[1] = 0;
|
|
}
|
|
else
|
|
{
|
|
sidev[1] = s_num2 > 0.0 ? -1 : 1;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
sidev[1] = s_num2 > 0.0 ? -1 : 1;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
sidev[0] = s_num1 > 0.0 ? -1 : 1;
|
|
sidev[1] = s_num2 > 0.0 ? -1 : 1;
|
|
}
|
|
|
|
if ((sidev[0] | sidev[1]) == 0)
|
|
{ // seg is coplanar with the splitter, so use its orientation to determine
|
|
// which child it ends up in. If it faces the same direction as the splitter,
|
|
// it goes in front. Otherwise, it goes in back.
|
|
|
|
if (node.dx != 0)
|
|
{
|
|
if ((node.dx > 0 && v2->x > v1->x) || (node.dx < 0 && v2->x < v1->x))
|
|
{
|
|
return 0;
|
|
}
|
|
else
|
|
{
|
|
return 1;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if ((node.dy > 0 && v2->y > v1->y) || (node.dy < 0 && v2->y < v1->y))
|
|
{
|
|
return 0;
|
|
}
|
|
else
|
|
{
|
|
return 1;
|
|
}
|
|
}
|
|
}
|
|
else if (sidev[0] <= 0 && sidev[1] <= 0)
|
|
{
|
|
return 0;
|
|
}
|
|
else if (sidev[0] >= 0 && sidev[1] >= 0)
|
|
{
|
|
return 1;
|
|
}
|
|
return -1;
|
|
}
|