Hi, I want to use the left and right key to rotate the camera two dimensionally around a point. If anybody could explain the solution mathematically as well I would be more than thankful!

Check the calculation at vec_for_angle.

What for a view (isometric, first person, ...) do you have?
I have solved this problem for a camera with a tilt of -35° some days ago. But my code is not the best, I believe...


JM

Okay, I found the solution The 768 is the radius!

VECTOR* temp_vec;
var cam_angle = 0;

function move_camera() {
temp_vec = vector(0,0,0);
while(1) {
if (key_cul) {
cam_angle +=1;
camera.x = cos(cam_angle) * 768;
camera.y = sin(cam_angle) * 768;
vec_diff(temp_vec.x,vector(0,0,0),camera.x);
vec_to_angle(camera.pan,temp_vec);
wait(1);
}
if (key_cur) {
cam_angle -=1;
camera.x = cos(cam_angle) * 768;
camera.y = sin(cam_angle) * 768;
vec_diff(temp_vec.x,vector(0,0,0),camera.x);
vec_to_angle(camera.pan,temp_vec);
wait(1);
}
wait(1);
}
}

Whoever wants a detailled explanation can read about it in my blog: http://www.jofre.de/?p=301 (German only)

just use the if statement once rather for left then right

if(key_cul || key_cur){
cam_angle += key_cul - key_cur; //or (key_cul - key_cur) * 1;
...