R_LightPoint bmodels fix

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R_LightPoint bmodels fix

Postby mh » Sun Apr 27, 2014 11:38 pm

I'm still in retirement but here's a present for you, seeing as this section of the forum is dead. You'll have to figure out much of what to do with this yourselves.
Code: Select all
vec3_t end, hit, lightspot2;

if (!cl.worldmodel->lightdata)
   Vector3Set (colour, 1.0f, 1.0f, 1.0f);

// offset from mins[2] to enclose the full world
Vector3Set (end, origin[0], origin[1], cl.worldmodel->mins[2] - 10.0f);

if (RecursiveLightPoint (cl.worldmodel->nodes, origin, end, colour) == -1)
   // copy off end as the hit point if we hit nothing on the world so that a bmodel will always be above it
   Vector3Set (colour, 0.0f, 0.0f, 0.0f);
   Vector3Copy (hit, end);
   // copy off the hit point
   Vector3Copy (hit, lightspot);

// add inline bmodels
// note - a proper setup would cache the local matrix and use transform/inversetransform like i do in q2;
// this is just a cheap and nasty implementation for non-rotating bmodels in q1.  if you're doing shadows
// also copy over lightplane
// find bmodels under the lightpoint - move the point to bmodel space, trace down, then check; if r < 0
// it didn't find a bmodel, otherwise it did (a bmodel under a valid world hit will hit here too)
// fixme: is it possible for a bmodel to not be in the PVS but yet be a valid candidate for this???
for (int i = 0; i < r_numvisedicts; i++)
   entity_t *e = r_visedicts[i];
   model_t *m = e->model;
   float estart[3], eend[3], ecolour[3];

   // only take inline bmodels
   if (!m) continue;
   if (m->name[0] != '*') continue;
   if (m->type != mod_brush) continue;

   // move start and end points into the entity's frame of reference
   Vector3Subtract (estart, origin, e->origin);
   Vector3Subtract (eend, end, e->origin);
   //R_InverseTransform (&e->localmatrix, estart, p);
   //R_InverseTransform (&e->localmatrix, eend, end);

   // and run the recursive light point on it too
   if (RecursiveLightPoint (m->nodes + m->hulls[0].firstclipnode, estart, eend, ecolour) != -1)
      // this is a potential hit spot
      // a bmodel under a valid world hit will hit here too so take the highest lightspot on all hits
      // move lightspot back to world space
      Vector3Add (lightspot2, lightspot, e->origin);
      //R_Transform (&e->localmatrix, lightspot2, lightspot);

      if (lightspot2[2] > hit[2])
         // found a bmodel so copy it over
         Vector3Copy (colour, ecolour);
         Vector3Copy (hit, lightspot2);

// the final hit point is the valid lightspot
Vector3Copy (lightspot, hit);

Bye again!
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Re: R_LightPoint bmodels fix

Postby qbism » Mon Apr 28, 2014 2:36 am

Yay, another broken tutorial! Umm, I mean, good to see you around! :D
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Re: R_LightPoint bmodels fix

Postby revelator » Sat May 03, 2014 2:56 pm

Hey MH :) nice to see you around Again.
Retirement ??? damn i thought i was old :P only kidding hehe.

R_Lightpoint.c i guess :) fix for the models sometime turning Black ?
Productivity is a state of mind.
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