/*
================
CM_TraceThroughBrush
================
*/
void CM_TraceThroughBrush( traceWork_t *tw, trace_t &trace, cbrush_t *brush, bool infoOnly )
{
int i;
cbrushside_t *side;
tw->enterFrac = -1.0f;
tw->leaveFrac = 1.0f;
tw->clipplane = NULL;
if ( !brush->numsides )
{
return;
}
tw->getout = false;
tw->startout = false;
tw->leadside = NULL;
//
// compare the trace against all planes of the brush
// find the latest time the trace crosses a plane towards the interior
// and the earliest time the trace crosses a plane towards the exterior
//
for (i = 0; i < brush->numsides; i++)
{
side = brush->sides + i;
if(!CM_PlaneCollision(tw, side))
{
return;
}
}
//
// all planes have been checked, and the trace was not
// completely outside the brush
//
if (!tw->startout)
{
if(!infoOnly)
{
// original point was inside brush
trace.startsolid = qtrue;
if (!tw->getout)
{
trace.allsolid = qtrue;
trace.fraction = 0.0f;
}
}
tw->enterFrac = 0.0f;
return;
}
if (tw->enterFrac < tw->leaveFrac)
{
if ((tw->enterFrac > -1.0f) && (tw->enterFrac < trace.fraction))
{
if (tw->enterFrac < 0.0f)
{
tw->enterFrac = 0.0f;
}
if(!infoOnly)
{
trace.fraction = tw->enterFrac;
trace.plane = *tw->clipplane;
trace.surfaceFlags = cmg.shaders[tw->leadside->shaderNum].surfaceFlags;
// tw->trace.sideNum = tw->leadside - cmg.brushsides;
trace.contents = brush->contents;
}
}
}
}
/*
================
CM_TraceThroughBrush
================
*/
void CM_TraceThroughBrush( traceWork_t *tw, trace_t &trace, cbrush_t *brush, bool infoOnly )
{
int i;
cbrushside_t *side;
tw->enterFrac = -1.0f;
tw->leaveFrac = 1.0f;
tw->clipplane = NULL;
if ( !brush->numsides )
{
return;
}
// I'm not sure if test is strictly correct. Are all
// bboxes axis aligned? Do I care? It seems to work
// good enough...
if ( tw->bounds[0][0] > brush->bounds[1][0]
|| tw->bounds[0][1] > brush->bounds[1][1]
|| tw->bounds[0][2] > brush->bounds[1][2]
|| tw->bounds[1][0] < brush->bounds[0][0]
|| tw->bounds[1][1] < brush->bounds[0][1]
|| tw->bounds[1][2] < brush->bounds[0][2]
) {
return;
}
tw->getout = false;
tw->startout = false;
tw->leadside = NULL;
//
// compare the trace against all planes of the brush
// find the latest time the trace crosses a plane towards the interior
// and the earliest time the trace crosses a plane towards the exterior
//
for (i = 0; i < brush->numsides; i++)
{
side = brush->sides + i;
if(!CM_PlaneCollision(tw, side))
{
return;
}
}
//
// all planes have been checked, and the trace was not
// completely outside the brush
//
if (!tw->startout)
{
if(!infoOnly)
{
// original point was inside brush
trace.startsolid = qtrue;
if (!tw->getout)
{
trace.allsolid = qtrue;
trace.fraction = 0.0f;
}
}
tw->enterFrac = 0.0f;
return;
}
if (tw->enterFrac < tw->leaveFrac)
{
if ((tw->enterFrac > -1.0f) && (tw->enterFrac < trace.fraction))
{
if (tw->enterFrac < 0.0f)
{
tw->enterFrac = 0.0f;
}
if(!infoOnly)
{
trace.fraction = tw->enterFrac;
trace.plane = *tw->clipplane;
trace.surfaceFlags = cmg.shaders[tw->leadside->shaderNum].surfaceFlags;
trace.contents = brush->contents;
}
}
}
}
