I am setting up my player so that he sends out a sonar c_trace. I was under the impression that c_trace sends out a "laser" and not a "cone", but the results I am getting indicate it's tracing a vertical plane/cone. Side-to-side tracing works as expected - my sonar activated entities are triggered when the player's center of view enters the left or right of the entities. However, top-to-bottom seems to be disregarded. As long as the center of my player's view is between the left/right sides of an entity, even if the center of the view is above or below the entity, the sonar is triggered. I want it so it only triggers if the center of view is between left/right AND top/bottom.

Following is my player code for tracing:
Code:

---

VECTOR vTrace;
...
vec_set(vTrace.x,vector(1000,0,0));
vec_rotate(vTrace,vector(my.pan,0,0));
vec_add(vTrace, my.x);
c_trace(my.x, vTrace.x, IGNORE_ME | IGNORE_MAPS | ACTIVATE_SONAR  );

---

What am I missing?

Thanks.

Code:

---

vec_rotate(vTrace,vector(my.pan,0,0));

---

should be replaced by
Code:

---

vec_rotate(vTrace,my.pan);

---

because when you use vector(my.pan,0,0), you completely disregard the tilt component of your angle. this means you can hit any entity on a similar z level to your player.

julz

After stepping away from the keyboard for a few hours, the thought occurred to me that part of the problem is that my trace should be relative to where my player is looking, which means it should be more camera-centric than player-centric. So, after playing a bit I came up with this:

Code:

---

vec_set(vTrace.x,vector(1000,0,0)); // 1000 units forward
vec_rotate(vTrace,vector(my.pan,camera.tilt,0)); // same pan as player (seems more accurate than camera) and same tilt as camera.
vec_add(vTrace, camera.x);
c_trace(camera.x, vTrace.x, IGNORE_ME | IGNORE_MAPS | ACTIVATE_SONAR  );

---

I kept the vec_rotate line the same except I added the "camera.tilt" to the vector() arguments. (When I tried "vec_rotate(vTrace,my.pan);" it still didn't work quite right).

I changed the vec_add() and the c_trace() lines to use camera.x instead of player.x

roger that.

I changed it to ...

vec_rotate(vTrace,camera.pan);

... and it worked. much more streamlined than what i had. Thanks once again for your help.