Take damage from a lightning

[NarGalloth]

Hi again.

I'm trying to make a spell for a boss of my campaign, and I trying to do it with triggers. When the boss launches the spell, a source of lighning comes from him to a random point of the battle area (Create Lightning Effect), and then begins to move around the area (Move Lightning Effect).
But it's a waste of time if the character doesn't take damage from the lightning.
How can I make the character to receive damage when he touches the lightning? I mean, not only the points when the lightning begins and ends, the entire body of the lighning too.

Please, if it can only be donde with JASS, tell me step by step how to do it, because I don't know anything of JASS. If it can be done with GUI, I prefer it above all.

Thanks for reading.

Regards

 

[InfernalTater]

Make the lightning a dummy unit with a custom immolation spell using lightning effects, and trigger the movement of the dummy unit.

 

[defskull]

This seems cool, but... JASS: http://www.hiveworkshop.com/forums/...v1-04-a-193892/?prev=search=omega&d=list&r=20

 

[InfernalTater]

Uh, that doesn't seem to have anything to do with what he asked for, are you just randomly posting that to try to rub things in? Are you that desperate for attention?

 

[Maker]

One option is to compare the angle from the origin of the lightning to the position of units an the angle of the lightning. If the angle difference is small, then the unit is colliding with the lightning. This uses a triangle shaped area can still be accurate enough and it's quite simple solution.

Or you could consider the lightning as a rectangle. Calculate corners of the rectangle derived from the end- and beginning points of the lightning. Then pick all units in range (~length of lightning) and check their coordinates with this:

// Returns a boolean that tells whether the point is inside a rectangle.
    // (px , py) = Point to check
    // (cx , cy) = lower left corner of the rect
    // (ax , ay) = upper left corner
    // (bx , by) = lower right corner
    function IsPointInRect takes real px , real py , real cx , real cy , real ax , real ay , real bx , real by returns boolean        
        local real dot1 = (px-cx)*(ax-cx) + (py-cy)*(ay-cy)
        local real dot2 = (ax-cx)*(ax-cx) + (ay-cy)*(ay-cy)
        local real dot3 = (px-cx)*(bx-cx) + (py-cy)*(by-cy)
        local real dot4 = (bx-cx)*(bx-cx) + (by-cy)*(by-cy)
        
        return dot1 >= 0 and dot1 <= dot2 and dot3 >= 0 and dot3 <= dot4
    endfunction

If that returns true, then the units collides with the lightning. With this solution, it's possible that very large models seem to collide with the lightning graphically, but is not colliding due to the center of the unit being far away from the lightning.

 

[InfernalTater]

Maker, he didn't want to recreate a shockwave. His lightning ball is moving around, meaning not in a straight line.

 

[Matthewop]

yeah i agree with you.. it is a regular pattern

 

[Maker]

Maker, he didn't want to recreate a shockwave. His lightning ball is moving around, meaning not in a straight line.

Yes, he didn't talk about a shockwave, but a lightning. A "line" of lightning that moves around. Both my solutions work for that.

 

[D4RK_G4ND4LF]

I just wasted two hours to make a spell just for you although I should learn for my final exams tomorrow
I hope you appreciate it

 

[InfernalTater]

Rather, I hope you appreciate him giving you an excuse to not learn for your finals tomorrow.

 

[NarGalloth]

Hi.

First of all, I must apologize for the large time I have passed without entering the forum. I have been studying and I hadn't any free time.
I looked your advise...

@TLI_Inferno: What I wanted to do is NOT a lighting ball, it's a line. Anyway, thanks for answering so much.
@D4RK_G4ND4LF: I checked your map, and I have to say that the effect is awesome. Sadly, I fear that I can't understand how that system works. Sorry, I'm still a bit noob, I suppose.
@Maker: I think that your idea is the most appropiate for what I want to do.

Anyway, in all of this time, I have been thinking about this lightning effect. Now I used your ideas, and finally I have been able to create a spell. It's not wonderful, but at least it does something that it's near enough to what I wanted to do.

I used mostly the base idea that Maker gave, so I think that I must give him a +rep.

Thanks for all of your advise.

Regards

 

[Trillium]

sorry for invading a thread, but do I get it right and these examples make an effect similar to Diablo III Disintegrate/Ray of Frost?