Porabilic motion of a projectory

Could someone help me get a porabilic motion for my entity that's fired for my first person shooter?

I want it so when the player fires, they must arch their shot up for distance, kind of like this little art thing I've included:

[img /img]

Also, after the entity has hit an object set with collisions, is there a way to "freeze" the entity, or make it stop where it hits the collision and stay there? Another example of what I'm talking about:

[img /img]

Thanks!
Chad

1. Gravity is what causes physical bodies to move along a parabola. See this thread on implementing gravity: http://blitzbasic.com/Community/posts.php?topic=55946&hl=gravity

2. Set the object's velocity vector to 0 when you detect the collision. You'll need to loop through all your entities, checking each for collisions.

Have you seen my FPS example?
In this section of code where the bullet is moved forward, also apply some downward movement to it.

For thisbullet.bullettype = Each bullettype			;iterate through all of the bullets
  MoveEntity thisbullet\entityhandle, 0, 0, 2			;move the bullet forward along the bullets Z axis
Next

could look like this:

For thisbullet.bullettype = Each bullettype			;iterate through all of the bullets
  MoveEntity thisbullet\entityhandle, 0, 0, 2			;move the bullet forward along the bullets Z axis
  TurnEntity thisbullet\entityhandle, .05, 0, 0			;rotate the bullet around its X axis to apply gravity
Next

Just adjust the turn movement according to how much gravity you want to apply.

No, no, no! Constant rotation will give you a circular arc and will yield highly unrealistic effects (especially if you shoot straight up!)

Chad:
I think you mean "Parabolic motion of a projectile". :-)

Octo:


He's not telling him to...

...oh wait, he is.

WolRon:
You shouldn't use MoveEntity. You should use TranslateEntity.

First you translate your gun's normal into global space like so:
TFormNormal 0, 0, 1, Gun, 0

Then you multiply that normal by the speed of your projectile:

Bvx# = TFormedX() * BulletSpeed#
Bvy# = TFormedY() * BulletSpeed#
Bvz# = TFormedZ() * BulletSpeed#

Then each frame, you multiply 9.8 by the number of seconds that that frame took to render, (Secs#) and subtract the result from Bvy#.

Finally, you move the bullet with translateentity each frame, like so:

Translatentity Bullet, Bvx#*Secs#, Bvy#*Secs#, Bvz#*Secs#

Oh, and use AlignToVector Bullet, Bvx#, Bvy#, Bvz#, 3 to align the bullet's Z axis with the direction it is traveling in.

Use ODE :p

Actually, Beginners forum. Scrub that!

Well, I was just giving him a simple solution...

Me too. That simulation doesn't take into account mass, air resistance, or the spin of the projectile which determines if it will tumble or not! ;-)

Oh, you're just too swift for me...

Well thanks all for your opinions and examples.. I appreciate it all..

Also, sswift, it is projectile, my bad!

Thanks,
Chad