detecting screen position of an entity

[Nahuel]

Is there a way to detect the relative coordinates of the screen of an entity of the world (items, monsters, etc...) when this is visible?
I wanna to put a csqc image or string, above the relative position of the entity in the screen, only if this is visible
without ssqc i could use a sprite only visible to my client, but i do not want to fight with scale.


Any ideas?

Thanks for your help!

[Spike]

string thetext = "hello world";
vector charsize = '8 8';
vector screenpos = project(theent.origin);
if (screenpos_z >= 0)
{
screenpos_x -= stringwidth(thetext, TRUE, charsize) * 0.5; //align horizontally to centre
screenpos_y -= charsize_y * 0.5; //align vertically again
screenpos_z = 0; //shut up dp.
drawstring(screenpos, thetext, charsize, '1 1 1', 1, 0);
}


(make sure you already set VF_ORIGIN+VF_ANGLES+VF_AFOV+VF_MIN+VF_SIZE etc, otherwise project won't have the correct model matrix+projection matrix+viewport and will give incorrect results, normally they should still be set from the last renderscene call).

[Nahuel]

cool
sorry for this noob question.
What is the easy way to share the origin of the ssqc entities with csqc?

[toneddu2000]

[Nahuel]

toneddu2000!!
thanks for the clues/explanation

[toneddu2000]

No prob, man!

[Nahuel]

[Spike]

be sure to add your 3d polys between your clearscene and renderscene calls.
remember that their verticies will take world-space coords.


there may be some confusion due to older versions of DP having a nasty habit of assuming stuff about whether the polygon is meant to be 2d or 3d. In FTE this was meant to be flags&4 to mean '2d - draw immediately' instead of adding it to the scene. Due to DP's weirdness however, you should use an extra 3rd argument to beginpolygon (FTE will understand this also, if that argument is specified).

Trying to draw '3d' polygons using projected 2d coords will result in affine texture sampling (read: weird depth-related distortions on your textures which might not be noticable if all the verts are the same distance from the camera). So don't do that unless you really have to.

otherwise you're going to hav to clarify what you mean by 'doesnt work properly'.

[toneddu2000]