Esempi in C++ (Cpp) per LineSegmentSide::partitionMapLine

Esempio n. 1

File: hplane.cpp Progetto: skyjake/Doomsday-Engine

void HPlane::distance(LineSegmentSide const &lineSeg, coord_t *fromDist, coord_t *toDist) const
{
    // Any work to do?
    if(!fromDist && !toDist) return;

    /// @attention Ensure line segments produced from the partition's source
    /// line are always treated as collinear. This special case is only
    /// necessary due to precision inaccuracies when a line is split into
    /// multiple segments.
    if(d->lineSegment && &d->lineSegment->mapSide().line() == lineSeg.partitionMapLine())
    {
        if(fromDist) *fromDist = 0;
        if(toDist)   *toDist   = 0;
        return;
    }

    coord_t toSegDirectionV1[2] = { d->partition.direction.x, d->partition.direction.y } ;

    if(fromDist)
    {
        coord_t fromV1[2] = { lineSeg.from().origin().x, lineSeg.from().origin().y };
        *fromDist = V2d_PointLinePerpDistance(fromV1, toSegDirectionV1, d->perp, d->length);
    }
    if(toDist)
    {
        coord_t toV1[2]   = { lineSeg.to().origin().x, lineSeg.to().origin().y };
        *toDist = V2d_PointLinePerpDistance(toV1, toSegDirectionV1, d->perp, d->length);
    }
}