How to find the target position?

OpenGL
1

Ok I have to admit that my math class was like ages ago… but…

How can I calculate the camera target position:

I have XYZ: camera position

I have XYZ: angles in degree

how can I calculate the XYZ of the camera target position assuming that the distance is 1.0f?

Cheers,

2

you have the camera position§,
you have the normalized camera direction(D),
you have the distance(L),
so, the target position(T) is :

T = P + D * L;

3

I guess the D matrix is mysterious in the previous post, the original poster talked about angles in degrees. Let’s say we are in the XY plane and have a heading rotation in the plane H and a pitch rotation P upward. The camera roll angle doesn’t influence the target position. Given further the camera position as X, Y, Z, we get a target position:

Xt = X+cos(H)*cos§
Yt = Y+sin(H)*cos§
Zt = Z+sin§

The only thing worth noting is that you may have to convert your angles to radians (OpenGL uses degrees in glRotate, but the C math lib uses radians!!!) by multiplying with PI/180 beforehand, e.g.
H=h180/PI, P=p180/PI, where h and p are the angles expressed in degrees.