Grapple Gun

[jimmynewguy]

I've always wanted to implement a grappling gun into a game, but never did. So I got bored and made one for kicks, and thought I'd share.

[Hblade]

interesting! I remember a long time ago, sgt.sparky made something similar. Good job I'd never understand the physics of it.

[jimmynewguy]

Haha, it's okay. But there really aren't "physics" to it. Plus I like trying to explain things so I'll try for you (and anyone else) line by line;

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int num = distance(player.x, player.y, mouse.x, mouse.y)/6;

This makes the variable num = the number of chains we need to get from point a to point b. It's the distance/6 because a chain is 6 pixels long.

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int i;

makes the variable i for the loop

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angle = direction(player.x, player.y, mouse.x, mouse.y);

gets the angle that the player will be heading

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if(!hooks)

If we don't have any hooks (so you cannot just keep shooting)

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breaks = 0;
player.angle = angle;
player.directional_velocity = 6;

all this together because its simple. We reset the breaks variable in case it was triggered last shot, set the player's angle, and make him go

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for(i=0;i<num;i++)

a loop for the number of chains

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Actor * this = CreateActor("hook", "chain_01", "(none)", "(none)", player.x, player.y, true);

make the chain at the player's and y and make it called "this" temporarily

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this->angle = angle;

set the chains angle

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this->directional_velocity = 7.5 * i;

make it as fast as it's number. In other words were making it 7.5 pixels away from the last created chain (7.5 so theres a little gap between chains for visual)

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this->animpos = angle/10;

set the chain's animation position

then when the chain is drawn we stop it from moving in the draw actor script and when there are no more hooks the player has gravity in his draw actor

sorry hblade I know some of that is obvious to you since you've used GE before, but others might not understand. I never saw sgt. sparkys though, his was probably better since mine doesn't have a distance limit and you can sometimes go through the ground a little if shot at the right angle. It would just make it more confusing for an example if I did all that though

[Hblade]

Thank you so much And hehe, I dont really have a lot of time to program so that tutorial was helpful in more ways than 1. You know how to explain things pretty good Thanks

[jimmynewguy]

No problem! Thanks for actually downloading things I make nothing's worse than no replies, I'd rather have people say it sucks!

[Hblade]

Lol I know that feeling

[Jagmaster]

Haha, Sweet!

I would have replied but my internet was down XD.

Mind if I use? I think it would make a good vine or rope or something like that. How would you make an actor "Stick" to a vine anyway? I tried dissecting (Or mutilating )
Dst's snake bone thing and having the player parent on to one of the bones. That did not work . Any suggestions?

[sunnybubblegum]

Super neat! I was having fun trying to swing non-stop.

How hard would it be to make it so that you can travel only part of the chain's distance? Like say on left-click up, the chain disappears and you're free to grapple to another spot. Do you see what I mean?

I like the look of the animations as well. Great job!

[jimmynewguy]

Super Easy.

On mousebutton up-> left

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DestroyActor("hook");
hooks = 0;

[SuperSonic]

Wow, I'm very impressed. I tried to do something like this before but badly failed

[happyjustbecause]

Excuse me for the huge bump, but I was wondering if I could maybe use the chain animations that you have. And maybe some of the coding for this grapple gun, to work on my own.

So I got bored and made one for kicks, and thought I'd share.

You probably don't mind at all, but I just want to make sure.