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Re: [DONE-SUB]point to target slowly
[Re: MMike]
#205651
05/07/08 19:25
05/07/08 19:25
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Joined: Oct 2004
Posts: 1,655
testDummy
Serious User
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Serious User
Joined: Oct 2004
Posts: 1,655
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see: ang function in manual? see: quaternions contribution thread (Lite-C)?
/************************************
vfPan2
ex-dump
_vSrc: src pos (my.x)
_vDest: dest pos (your.x, player.x, etc.)
_3Step:
[_iPAN] = entity pan
[_iSTEP] = turn step (multiplied by time)
_vTmp: a temp vector
use:
my.pan += vfPan2(my.x, player.x, vector(my.pan, 3.15, 0), temp);
or
temp.pan = vfPan2(my.x, player.x, vector(my.pan, 3.15, 0), temp);
temp.tilt = 0; temp.roll = 0;
c_rotate(me,temp,ignore_passable + ignore_passents + ignore_me + glide);
*************************************/
function vfPan2(&_vSrc ,&_vDest, &_3Step, &_vTmp) {
//vec_set(_vTmp, nullvector);
vec_diff(_vTmp, _vDest, _vSrc);
vec_to_angle(_vTmp, _vTmp);
_vTmp[0] = ang(_vTmp[0] - _3Step[iPAN]);
_vTmp[1] = abs(_vTmp[0]);
//if (_vTmp[1] < 0.10) {
//return(_vTmp[0]);
//}
_vTmp[2] = ang(min(_vTmp[1], time * _3Step[iSTEP]) * sign(_vTmp[0]));
return(_vTmp[2]);
}
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Re: [DONE-SUB]point to target slowly
[Re: MMike]
#205678
05/07/08 22:08
05/07/08 22:08
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Joined: Oct 2004
Posts: 1,655
testDummy
Serious User
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Serious User
Joined: Oct 2004
Posts: 1,655
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clarification, or worse: The posted code, which might not work at all, but did seem to for something, is not Lite-C. It is C-Script, for rotating an entity toward a point, gradually, with no overshoot, but only for pan, ...or maybe it's alphabet soup instead. (Function vf (vector function) Pan2 (pan to) is supposed to be similar to the above function actor_turnto?) quoting manual for function ang (should be a command for C-Script and Lite-C):
ang(x)
Shifts the angle x into the -180 .. +180 range by adding or subtracting a multiple of 360 degrees. Often useful for calculating angle differences.
Returns:
Same angle, shifted into the -180 .. +180 range.
A thread in category Lite-C contributions is referred to for Lite-C and quaternions. Perhaps there was a misunderstanding here, and the information offered is irrelevant. 'My' knowledge on many topics is very limited.
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Re: [DONE-SUB]point to target slowly
[Re: MMike]
#207997
05/23/08 23:11
05/23/08 23:11
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Joined: Feb 2006
Posts: 2,185
mpdeveloper_B
Expert
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Expert
Joined: Feb 2006
Posts: 2,185
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i should have posted this before, but i suppose this can help you:
FUNCTION rotate_entity_(rotate_angle,rotate_speed)
{
IF (my.pan == rotate_angle) { return; }
result = ang(rotate_angle - my.pan);
IF (result > 0) { my.pan += rotate_speed * time_step; }
IF (result < 0) { my.pan -= rotate_speed * time_step; }
IF (ang(rotate_angle - my.pan) < 0 && result > 0) { my.pan = rotate_angle; }
IF (ang(rotate_angle - my.pan) > 0 && result < 0) { my.pan = rotate_angle; }
}
this is how you would use it:
vec_set (temp, you.x);
vec_sub (temp, my.x);
vec_to_angle (temp_pan, temp);
rotate_entity_(temp_pan,turn_speed_);
///if you want to keep tilt at 0, just add "my.tilt = 0;" right here
if you'd prefer to use c_rotate, then use this one:
FUNCTION rotate_entity_(rotate_angle,rotate_speed)
{
var r;
IF (my.pan == rotate_angle) { return; }
r = ang(rotate_angle - my.pan);
IF (r > 0) { c_rotate(me, vector(rotate_speed*time_step,0,0), ignore_passable); }
IF (r < 0) { c_rotate(me, vector(-rotate_speed*time_step,0,0), ignore_passable); }
IF (ang(rotate_angle - my.pan) < 0 && r > 0) { my.pan = rotate_angle; }
IF (ang(rotate_angle - my.pan) > 0 && r < 0) { my.pan = rotate_angle; }
}
- aka Manslayer101
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