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Clamp xy angle range in P_SetSlope()

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- This function just assumed that every xy angle passed to it was within
  the range [0,360). This is obviously bad, since anything outside that
  range can result in accessing data outside the range of the finecosine
  and finesine tables.
This commit is contained in:
Randy Heit 2014-02-24 18:16:18 -06:00
parent a60918f601
commit 5a5fb9b3d1
1 changed files with 8 additions and 2 deletions
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10
src/p_slopes.cpp
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@ -178,6 +178,12 @@ void P_SetSlope (secplane_t *plane, bool setCeil, int xyangi, int zangi,
} }
zang >>= ANGLETOFINESHIFT; zang >>= ANGLETOFINESHIFT;
// Sanitize xyangi to [0,360) range
xyangi = xyangi % 360;
if (xyangi < 0)
{
xyangi = 360 + xyangi;
}
xyang = (angle_t)Scale (xyangi, ANGLE_90, 90 << ANGLETOFINESHIFT); xyang = (angle_t)Scale (xyangi, ANGLE_90, 90 << ANGLETOFINESHIFT);
FVector3 norm; FVector3 norm;
@ -446,11 +452,11 @@ void P_SpawnSlopeMakers (FMapThing *firstmt, FMapThing *lastmt, const int *oldve
P_VavoomSlope(sec, mt->thingid, x, y, mt->z, mt->type & 1); P_VavoomSlope(sec, mt->thingid, x, y, mt->z, mt->type & 1);
} }
else if (mt->type <= THING_SlopeCeilingPointLine) else if (mt->type <= THING_SlopeCeilingPointLine)
{ { // THING_SlopeFloorPointLine and THING_SlopCeilingPointLine
P_SlopeLineToPoint (mt->args[0], x, y, z, mt->type & 1); P_SlopeLineToPoint (mt->args[0], x, y, z, mt->type & 1);
} }
else else
{ { // THING_SetFloorSlope and THING_SetCeilingSlope
P_SetSlope (refplane, mt->type & 1, mt->angle, mt->args[0], x, y, z); P_SetSlope (refplane, mt->type & 1, mt->angle, mt->args[0], x, y, z);
} }
mt->type = 0; mt->type = 0;