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Fix edge case when checking line in P_PathTraverse

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Ported from 31e8ba9238
This commit is contained in:
Gustaf Alhäll 2025-09-23 22:39:47 +02:00 committed by NepDisk
parent 3778520ee6
commit 31ac81fe93
1 changed files with 21 additions and 1 deletions
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20
src/p_maputl.c
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@ -1802,9 +1802,29 @@ boolean P_PathTraverse(fixed_t px1, fixed_t py1, fixed_t px2, fixed_t py2,
pos_x += hity_x;
pos_y += hity_y;
}
else if (FixedMul(hitx_x, hitx_x) + FixedMul(hitx_y, hitx_y) < FixedMul(hity_x, hity_x) + FixedMul(hity_y, hity_y))
{
gridpos_x += dir_x;
pos_x += hitx_x;
pos_y += hitx_y;
}
else
{
// we hit a corner, round down towards south-east
if (dir_x < 0 && dir_y > 0)
{
gridpos_y += dir_y;
}
else if (dir_x > 0 && dir_y < 0)
{
gridpos_x += dir_x;
}
else
{
gridpos_x += dir_x;
gridpos_y += dir_y;
}
pos_x += hitx_x;
pos_y += hitx_y;
}