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- fixed a float/fixed mixup in R_PointOnSideSlow.

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This commit is contained in:
Christoph Oelckers 2016-03-31 17:44:05 +02:00
commit 8f5ac9b73f
5 changed files with 15 additions and 12 deletions
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8
src/p_maputl.cpp
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@ -1791,12 +1791,14 @@ static AActor *RoughBlockCheck (AActor *mo, int index, void *param)
//
//==========================================================================
static int R_PointOnSideSlow(double x, double y, node_t *node)
static int R_PointOnSideSlow(double xx, double yy, node_t *node)
{
// [RH] This might have been faster than two multiplies and an
// add on a 386/486, but it certainly isn't on anything newer than that.
fixed_t dx;
fixed_t dy;
fixed_t x = FloatToFixed(xx);
fixed_t y = FloatToFixed(yy);
double left;
double right;
@ -1815,8 +1817,8 @@ static int R_PointOnSideSlow(double x, double y, node_t *node)
return node->dx > 0;
}
dx = (FloatToFixed(x) - node->x);
dy = (FloatToFixed(y) - node->y);
dx = (x - node->x);
dy = (y - node->y);
// Try to quickly decide by looking at sign bits.
if ((node->dy ^ node->dx ^ dx ^ dy) & 0x80000000)