//===========================================================================
// returns the ground face the given point is above in the given area
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
aas_face_t *AAS_AreaGroundFace(int areanum, vec3_t point)
{
int i, facenum;
vec3_t up = {0, 0, 1};
vec3_t normal;
aas_area_t *area;
aas_face_t *face;
if (!aasworld.loaded) return NULL;
area = &aasworld.areas[areanum];
for (i = 0; i < area->numfaces; i++)
{
facenum = aasworld.faceindex[area->firstface + i];
face = &aasworld.faces[abs(facenum)];
//if this is a ground face
if (face->faceflags & FACE_GROUND)
{
//get the up or down normal
if (aasworld.planes[face->planenum].normal[2] < 0) VectorNegate(up, normal);
else VectorCopy(up, normal);
//check if the point is in the face
if (AAS_InsideFace(face, normal, point, 0.01f)) return face;
} //end if
} //end for
return NULL;
} //end of the function AAS_AreaGroundFace
//===========================================================================
// returns the face the trace end position is situated in
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
aas_face_t *AAS_TraceEndFace( aas_trace_t *trace ) {
int i, facenum;
aas_area_t *area;
aas_face_t *face, *firstface = NULL;
if ( !( *aasworld ).loaded ) {
return NULL;
}
//if started in solid no face was hit
if ( trace->startsolid ) {
return NULL;
}
//trace->lastarea is the last area the trace was in
area = &( *aasworld ).areas[trace->lastarea];
//check which face the trace.endpos was in
for ( i = 0; i < area->numfaces; i++ )
{
facenum = ( *aasworld ).faceindex[area->firstface + i];
face = &( *aasworld ).faces[abs( facenum )];
//if the face is in the same plane as the trace end point
if ( ( face->planenum & ~1 ) == ( trace->planenum & ~1 ) ) {
//firstface is used for optimization, if theres only one
//face in the plane then it has to be the good one
//if there are more faces in the same plane then always
//check the one with the fewest edges first
/* if (firstface)
{
if (firstface->numedges < face->numedges)
{
if (AAS_InsideFace(firstface,
(*aasworld).planes[face->planenum].normal, trace->endpos))
{
return firstface;
} //end if
firstface = face;
} //end if
else
{
if (AAS_InsideFace(face,
(*aasworld).planes[face->planenum].normal, trace->endpos))
{
return face;
} //end if
} //end else
} //end if
else
{
firstface = face;
} //end else*/
if ( AAS_InsideFace( face,
( *aasworld ).planes[face->planenum].normal, trace->endpos, 0.01 ) ) {
return face;
}
} //end if
} //end for
return firstface;
} //end of the function AAS_TraceEndFace
