/*
=================
R_TraceAgainstSurface
=================
*/
static bool R_TraceAgainstSurface( msurface_t *surf )
{
int i;
mesh_t *mesh;
elem_t *elem;
vec4_t *verts;
float old_frac = trace_fraction;
if( !surf ) return false;
mesh = surf->mesh;
if( !mesh ) return false;
elem = mesh->elems;
if( !elem ) return false;
verts = mesh->xyzArray;
if( !verts ) return false;
// clip each triangle individually
for( i = 0; i < mesh->numElems; i += 3, elem += 3 )
{
R_TraceAgainstTriangle( verts[elem[0]], verts[elem[1]], verts[elem[2]] );
if( old_frac > trace_fraction )
{
// flip normal is we are on the backside (does it really happen?)...
if( surf->facetype == MST_PLANAR )
{
if( DotProduct( trace_plane.normal, surf->plane->normal ) < 0 )
VectorNegate( trace_plane.normal, trace_plane.normal );
}
return true;
}
}
return false;
}
/*
* R_TraceAgainstSurface
*/
static bool R_TraceAgainstSurface( msurface_t *surf ) {
int i;
mesh_t *mesh = &surf->mesh;
elem_t *elem = mesh->elems;
vec4_t *verts = mesh->xyzArray;
float old_frac = trace_fraction;
bool isPlanar = ( surf->facetype == FACETYPE_PLANAR ) ? true : false;
// clip each triangle individually
for( i = 0; i < mesh->numElems; i += 3, elem += 3 ) {
R_TraceAgainstTriangle( verts[elem[0]], verts[elem[1]], verts[elem[2]] );
if( old_frac > trace_fraction ) {
// flip normal is we are on the backside (does it really happen?)...
if( isPlanar ) {
if( DotProduct( trace_plane.normal, surf->plane ) < 0 ) {
VectorInverse( trace_plane.normal );
}
}
return true;
}
}
return false;
}
