Ok, I THINK the 90 degrees off thing is because I had this:
R_SetView(VF_ANGLES, '0 0 0');
before the previous code... but changing it to '0 -90 0' seems to mess things up even after getting rid of the x and y swap... guess I'll have to mess around with this more.
cs_project in csqc
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by Urre » Mon Mar 10, 2008 2:51 pm
In your last post, what does the line org = cs_unproject(org); result in? As I understand it, it's a spot in the world. Am I supposed to project from the camera position to the result from cs_unproject or what (if I want to traceline)? Or is it possibly even simpler, a direction it returns?
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by Spike » Mon Mar 10, 2008 4:21 pm
unproject takes a 2d coordinate with depth (3d...) and converts it into a 3d coordinate.
if you unproject the same point twice with depth of 0 and 1, you'll get the view position (a point on the near clip plane) and a point gl_maxdist away. You can then traceline between the two to see what you hit.
Note that the unproject function uses the view properties state to generate matricies as required, so you will need to clear the scene and set up some stuff before use. At least if you're inside an update event.
if you unproject the same point twice with depth of 0 and 1, you'll get the view position (a point on the near clip plane) and a point gl_maxdist away. You can then traceline between the two to see what you hit.
Note that the unproject function uses the view properties state to generate matricies as required, so you will need to clear the scene and set up some stuff before use. At least if you're inside an update event.
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by Urre » Mon Mar 31, 2008 2:04 pm
After some IRC chat with LH and frank, we came to various conclusions. One conclusion of franks perception which made it somewhat work, was that depth needed to be as far as I wanted it to trace, not between 0-1. I used 10000 on the second unproject for giggles, and that atleast trace into the world. What was still wrong however was that it didn't properly match the mousepointer. It seemed off-scale, or offset strangely. I did lots of tweaking, but to no good result. LH later informed me that I need to set up a view for it to properly work, which basicly means running the code after my R_SetView(VF_ORIGIN, blah); and R_SetView(VF_ANGLES, blah); but that didn't change anything at all... Any thoughts? Anything I've missed?
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