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| bool BSPNode::traceBox (tracedata_t * td, const Vector & v0,
const Vector & v1, const Vector & halfSize) const
{
if (type == NODE_SOLID)
{
td->t = 0.f;
return true;
}
else if (type & (NODE_EMPTY | NODE_VOID))
return false;
Vector temp, dir;
float addDist;
tracedata_t td1, td2;
bool hit1, hit2;
/*td1.t = 0.f;
td1.planeNormal = plane->normal;
td2 = td1;*/
if (plane->normal.x >= 0.f)
addDist = plane->normal.x * halfSize.x;
else
addDist = -plane->normal.x * halfSize.x;
if (plane->normal.y >= 0.f)
addDist += plane->normal.y * halfSize.y;
else
addDist -= plane->normal.y * halfSize.y;
if (plane->normal.z >= 0.f)
addDist += plane->normal.z * halfSize.z;
else
addDist -= plane->normal.z * halfSize.z;
float d0 = v0.dot (plane->normal) - plane->dist;
float d1 = v1.dot (plane->normal) - plane->dist;
dir.sub (v1, v0);
if (dir.dot (plane->normal) < 0.f)
{
if ((type & NODE_AAFLAG) || ((d0 + addDist) <= 0.f))
hit1 = false;
else if ((d1 + addDist) >= 0.f)
hit1 = front->traceBox (&td1, v0, v1, halfSize);
else
{
float dt = (d0 + addDist) / (d0 - d1);
temp.addScale (v0, dir, dt);
//td1.planeNormal = plane->normal;
if (hit1 = front->traceBox (&td1, v0, temp, halfSize))
{
if (td1.t == 0.f)
{
td1.planeNormal = plane->normal;
td1.nodeID = id;
}
else
td1.t *= dt;
}
}
if ((d1 - addDist) >= 0.f)
hit2 = false;
else if ((d0 - addDist) <= 0.f)
hit2 = back->traceBox (&td2, v0, v1, halfSize);
else
{
float dt = (d0 - addDist) / (d0 - d1);
temp.addScale (v0, dir, dt);
//td2.planeNormal = plane->normal;
if (hit2 = back->traceBox (&td2, temp, v1, halfSize))
{
if (td2.t == 0.f)
{
td2.t = dt;
td2.planeNormal = plane->normal;
td2.nodeID = id;
}
else
td2.t = (1.f - dt) * td2.t + dt;
}
}
}
else
{
if ((d0 - addDist) >= 0.f)
hit1 = false;
else if ((d1 - addDist) <= 0.f)
hit1 = back->traceBox (&td1, v0, v1, halfSize);
else
{
float dt = (d0 - addDist) / (d0 - d1);
temp.addScale (v0, dir, dt);
//td1.planeNormal = plane->normal;
if (hit1 = back->traceBox (&td1, v0, temp, halfSize))
{
if (td1.t == 0.f)
{
td1.nodeID = id;
td1.planeNormal = plane->normal;
}
else
td1.t *= dt;
}
}
if ((type & NODE_AAFLAG) || ((d1 + addDist) <= 0.f))
hit2 = false;
else if ((d0 + addDist) >= 0.f)
hit2 = front->traceBox (&td2, v0, v1, halfSize);
else
{
float dt = (d0 + addDist) / (d0 - d1);
temp.addScale (v0, dir, dt);
//td2.planeNormal = plane->normal;
if (hit2 = front->traceBox (&td2, temp, v1, halfSize))
{
if (td2.t == 0.f)
{
td2.t = dt;
td2.planeNormal = plane->normal;
td2.nodeID = id;
}
else
td2.t = (1.f - dt) * td2.t + dt;
}
}
}
if (hit1)
{
if (hit2)
{
if (td1.t < td2.t)
{
*td = td1;
return true;
}
*td = td2;
return true;
}
*td = td1;
return true;
}
if (hit2)
{
*td = td2;
return true;
}
return false;
} |