In orthographic mode( flat 2D ), the shooting is pretty straight forward. Shoot as in from a gun and in first person view perspective.

And in 3D, you gotta use rotating code like


But how in the world do you make the bullet object spawn from where you're standing and make it move forward like in every fps game?

I've come up with a few ideas that aren't working out. One was to use SDL and OpenGL then blit a bullethole texture in the center of the screen. That sounds really complicated and probably not the correct way, I think!

The real way would maybe figure out the trigonometry of the bullet object then move it in a straight line in whatever direction the camera is facing. Again, I'm assuming the basic of how it might be done.


Currently, the sphere I spawn when pressing Space would appear at wherever I stand, then float along towards the negative side of Z-axis. It moves away and appears where I am so that's good. But if I turn away, it'd spawn at the side of me, instead of in front. What do I need to think about to get the object to always appear in front and then fly away in that same direction?

This is all the "forward-action" trig code I have:

This is kind of abstract, sorry.

There are a couple of ways of doing this, so if anyone has something better then please chime in.

You are probably going to want to keep track of 3 things for every bullet.

1) The bullet's position vector XYZ.

2) The direction the bullet is facing. This can either be angles (kind of like polar coordinates), or a unit vector XYZ.

3) The bullet's velocity vector XYZ.

Ideally whatever is firing your bullet should have the same properties, so it might be a good idea to create a generic "entity" class or structure.

When you "fire" a bullet it should start with the same position and direction as it's parent. It's velocity should also be the same, but it should have a greater magnitude (because most bullets travel _away_ from what is firing them ).

A little more code or explanation of how you're doing things would be helpful.