[Solved] Neat velocity/math problem

[edward850]

There is obviously a logical answer to this but I can't think as to what it could be.
I'm spawning an item using [wiki]A_SpawnItemEx[/wiki] using the players momentum. This only works properly if it's using SXF_ABSOLUTEMOMENTUM, and that's fine, but I want to fire off the object at an angle from the player.
So, the idea would be to use the player's current angle, and add that to the objects spawning momentum somehow. So, the question is, how? What equation could be used to do that?

My code, presently, is this:

Code: Select all

A_SpawnItemEx ("Casing", random(1,4), 0, random(2,4)+32, velx, vely, velz, 0, SXF_NOCHECKPOSITION|SXF_ABSOLUTEMOMENTUM)

I would want to add the value to velx/y somehow. Any ideas?

[XutaWoo]

cos(angle) and sin(angle) for x and y, respectively.

Multiply the force by those and add the result to velx and vely.

[edward850]

Either I'm not sure what you are getting at, or I seem to have not explained my problem correctly.
"casing" is to be spawned with the players present momentum. However, the object must always fly away (say, at 3 units of speed) to the right of the player. Using SXF_ABSOLUTEMOMENTUM means I can't just use velx+3 (because that never account for the players angle), and not using it means that the velocity information is thrown off by the players angle.

[XutaWoo]

, velx+(3*cos(angle)), vely+(3*sin(angle)),

[edward850]

Opps, I accidentally put cos instead of sin for valy, and then forgot the save it when I changed it. Silly me.
Thanks for the help.