Orbiting Effect Around A Building

[Yours Truly]

Can someone tell me how to make a triggered orbiting effect at a building? I need the orbiting effect to face the direction on where it will go next.
Any help would be greatly appreciated : )

 

[olvenmage]

Can someone tell me how to make a triggered orbiting effect at a building? I need the orbiting effect to face the direction on where it will go next.
Any help would be greatly appreciated : )

What do you mean "Where it wil go next"

 

[Ardenian]

That's quite easy to trigger:

X coordinate of an orbiting effect: originx + orbitrange * cos(angle)
Y coordinate of an orbiting effect: originy + orbitrange * sin(angle)

The location (originx, originy) is the origin the effect orbits around.
orbitrange is the range of the circle the effect moves around.
angle is the angle between the origin location and the current effect location.

Example:
If your effect travels around the building within one second, then do the following:
Periodically, change angle to 6*( seconds up to one second) passed and set the location of the effect
to ( originx + orbitrange * cos(angle), originy + orbitrange * sin(angle))

 

[Arad MNK]

Take a look at this tutorial.

http://www.hiveworkshop.com/forums/miscellaneous-tutorials-456/about-movement-172309/

 

[Wietlol]

That's quite easy to trigger:

X coordinate of an orbiting effect: originx + orbitrange * cos(angle)
Y coordinate of an orbiting effect: originy + orbitrange * sin(angle)

That is a very intuitive approach though.

"I want the effect to move at 500 units per second"
Now you have a problem... kinda.
You can indeed calculate it so it will turn X radians per second calculated on the edge of the circle (Pi*d)

But what if the unit it is orbitting from is moving around?
Then it gets interesting.

There are multiple ways of orbiting, I like the one that is more of an actual missile.

 

[Ardenian]

Yes, I agree. It is the most basic method to create an orbiting object without considering
anything else.

However, isn't it easy to calculate the new position of the orbitting object, since you can
simply compare the old to the new position and add the difference to the orbitting object.