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Updated A_FaceVelocity.

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- Now includes anglelimit and pitchlimit.
- Anglelimit and pitchlimit only allows the actor to turn this much, similar to A_FaceTarget's limit. FVF_RESETPITCH also respects the pitch limit.
- (offset, anglelimit, pitchlimit, flags, ptr)
This commit is contained in:
MajorCooke 2015-11-25 21:49:25 -06:00
parent 75855dc64a
commit ab5b1f479a
2 changed files with 78 additions and 14 deletions
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90
src/thingdef/thingdef_codeptr.cpp
View file

@ -5947,10 +5947,12 @@ enum FVFlags
};
DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_FaceVelocity)
{
ACTION_PARAM_START(3);
ACTION_PARAM_FIXED(offset, 0)
ACTION_PARAM_INT(flags, 1);
ACTION_PARAM_INT(ptr, 2);
ACTION_PARAM_START(5);
ACTION_PARAM_ANGLE(offset, 0);
ACTION_PARAM_ANGLE(anglelimit, 1);
ACTION_PARAM_ANGLE(pitchlimit, 2);
ACTION_PARAM_INT(flags, 3);
ACTION_PARAM_INT(ptr, 4);
AActor *mobj = COPY_AAPTR(self, ptr);
@ -5964,21 +5966,83 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_FaceVelocity)
//Don't bother calculating this if we don't have any horizontal movement.
if (!(flags & FVF_NOANGLE) && (mobj->velx != 0 || mobj->vely != 0))
{
fixed_t vx = mobj->x + mobj->velx, vy = mobj->y + mobj->vely;
angle_t angle = R_PointToAngle2(mobj->x, mobj->y, vx, vy) + offset;
mobj->SetAngle(angle, !!(flags & FVF_INTERPOLATE));
const fixed_t vx = mobj->velx + mobj->x, vy = mobj->vely + mobj->y;
angle_t current = mobj->angle;
const angle_t angle = R_PointToAngle2(mobj->x, mobj->y, vx, vy);
//Done because using anglelimit directly causes a signed/unsigned mismatch.
const angle_t limit = anglelimit;
//Code borrowed from A_Face*.
if (limit > 0 && (absangle(current - angle) > limit))
{
if (current < angle)
{
// [MC] This may appear backwards, but I assure any who
// reads this, it works.
if (current - angle > ANGLE_180)
current += limit + offset;
else
current -= limit + offset;
mobj->SetAngle(current, !!(flags & FVF_INTERPOLATE));
}
else if (current > angle)
{
if (angle - current > ANGLE_180)
current -= limit + offset;
else
current += limit + offset;
mobj->SetAngle(current, !!(flags & FVF_INTERPOLATE));
}
else
mobj->SetAngle(angle + ANGLE_180 + offset, !!(flags & FVF_INTERPOLATE));
}
else
mobj->SetAngle(angle + offset, !!(flags & FVF_INTERPOLATE));
}
if (!(flags & FVF_NOPITCH))
{
//Reset pitch to 0 if specified.
if (mobj->velz == 0 && (flags & FVF_RESETPITCH))
mobj->pitch = 0;
fixed_t current = mobj->pitch;
const FVector2 velocity(mobj->velx, mobj->vely);
const fixed_t pitch = R_PointToAngle2(0, 0, (fixed_t)velocity.Length(), -mobj->velz);
if (pitchlimit > 0)
{
// [MC] angle_t for pitchlimit was required because otherwise
// we would wind up with less than desirable turn rates that didn't
// match that of A_SetPitch. We want consistency. Also, I didn't know
// of a better way to convert from angle_t to fixed_t properly so I
// used this instead.
fixed_t plimit = fixed_t(pitchlimit);
if (abs(current - pitch) > plimit)
{
fixed_t max = 0;
if (current > pitch)
{
max = MIN(plimit, (current - pitch));
current -= max;
}
else //if (current > pitch)
{
max = MIN(plimit, (pitch - current));
current += max;
}
if ((mobj->velz != 0) || (flags & FVF_RESETPITCH))
mobj->SetPitch(current, !!(flags & FVF_INTERPOLATE));
}
else
{
if ((mobj->velz != 0) || (flags & FVF_RESETPITCH))
mobj->SetPitch(pitch, !!(flags & FVF_INTERPOLATE));
}
}
else
{
FVector2 velocity(mobj->velx, mobj->vely);
fixed_t pitch = R_PointToAngle2(0, 0, (fixed_t)velocity.Length(), mobj->velz);
mobj->SetPitch(-pitch, !!(flags & FVF_INTERPOLATE));
if ((mobj->velz != 0) || (flags & FVF_RESETPITCH))
mobj->SetPitch(pitch, !!(flags & FVF_INTERPOLATE));
}
}
}

2
wadsrc/static/actors/actor.txt
View file

@ -340,7 +340,7 @@ ACTOR Actor native //: Thinker
action native A_CheckBlock(state block, int flags = 0, int ptr = AAPTR_DEFAULT);
action native A_CheckSightOrRange(float distance, state label, bool two_dimension = false);
action native A_CheckRange(float distance, state label, bool two_dimension = false);
action native A_FaceVelocity(float offset = 0, int flags = 0, int ptr = AAPTR_DEFAULT);
action native A_FaceVelocity(float offset = 0, float anglelimit = 0, float pitchlimit = 0, int flags = 0, int ptr = AAPTR_DEFAULT);
action native A_RearrangePointers(int newtarget, int newmaster = AAPTR_DEFAULT, int newtracer = AAPTR_DEFAULT, int flags=0);
action native A_TransferPointer(int ptr_source, int ptr_recepient, int sourcefield, int recepientfield=AAPTR_DEFAULT, int flags=0);