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  Top down shooting rendering[SOLVED]  (Read 1060 times)
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Offline wessles

JGO Wizard


Medals: 66
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Radirius Software Lead Developer


« Posted 2013-07-30 03:22:23 »

So, I was going to make the shooting for my game. Then, I recalled that moving a bullet is unreliable, as it could be moving so fast, that it passes the target in 1 update frame, never touching it. So I need a new shooting system, that looks just like this:
<a href="http://www.youtube.com/v/xlM2XDPsF_0?version=3&amp;hl=en_US&amp;start=" target="_blank">http://www.youtube.com/v/xlM2XDPsF_0?version=3&amp;hl=en_US&amp;start=</a>
How would I do the streak of light and hit the target? I know I am being vague, but If you understand what I'm asking, please help!

Offline HeroesGraveDev

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« Reply #1 - Posted 2013-07-30 04:41:01 »

2D Raycasting.

Offline Troncoso

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Medals: 20



« Reply #2 - Posted 2013-07-30 06:35:46 »

^^^^

Which you can do with a regular bullet, as well. Basically just draw an invisible line from the origin to the end point, and check if anything touches that line. Then move the bullet to the closest collision.
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Offline wessles

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Medals: 66
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Radirius Software Lead Developer


« Reply #3 - Posted 2013-07-30 15:15:42 »

K, will do. But what does
2D Raycasting.
have to do with it? Do you mean draw a ray of light?!

Offline Longarmx
« Reply #4 - Posted 2013-07-30 16:34:11 »

K, will do. But what does
2D Raycasting.
have to do with it? Do you mean draw a ray of light?!

Googling always helps.

Offline wessles

JGO Wizard


Medals: 66
Projects: 4
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Radirius Software Lead Developer


« Reply #5 - Posted 2013-07-30 16:51:43 »

Ok, I thought that ray-casting was for rendering only. Now I know!
[Solved]!

Offline pploco1996

Junior Member


Medals: 2
Exp: 1 year



« Reply #6 - Posted 2013-08-12 02:06:34 »

Well if are going to use a projectile instead of a ray, I'd recomend you to use jbox2d and if you are using LibGDX then it's perfect because jbox2d is already built-in the library
Offline Jimmt
« League of Dukes »

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« Reply #7 - Posted 2013-08-12 17:25:36 »

Well if are going to use a projectile instead of a ray, I'd recomend you to use jbox2d and if you are using LibGDX then it's perfect because jbox2d is already built-in the library
Not jbox2d, the original box2d Smiley
Box2d supplies collision detection specifically for bullets, with the bullet boolean in BodyDef.
Offline lcass
« Reply #8 - Posted 2013-08-20 23:13:27 »

well you can raycast it then tell everything on the x/y it intersects to perform a function such as losehealth(int/float/double etx)
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