Method Intersect

engine/Poseidon/World/Scene/ObjectIntersect.cpp:499–656

#endif

void Object::Intersect(CollisionBuffer& result, Object* with, const FrameBase& thisPos, const FrameBase& withPos,
                       int hierLevel) const
{
    // typical usage:
    // this is object in landscape
    // with is vehicle we test on collisions
    // with inverse transformation is typically cheap
    LODShape* withShape = with->GetShape();
    LODShape* thisShape = this->GetShape();
    if (!withShape || !thisShape)
    {
        return;
    }
    // check all possible collisions between components of this and with
    // create transformation between with and this
    // first of all check object bounding spheres
    float dist2 = thisPos.Position().Distance2(withPos.Position());
    float sumRadius2 = Square(this->GetRadius() + with->GetRadius());
    if (dist2 > sumRadius2)
    {
        return; // no collision possible
    }
    if (thisShape->GetGeomComponents().Size() <= 0)
    {
        return;
    }
    if (withShape->GetGeomComponents().Size() <= 0)
    {
        return;
    }
    Shape* withGeom = withShape->GeometryLevel();
    Shape* thisGeom = thisShape->GeometryLevel();

    if (!withGeom || !thisGeom)
    {
        return;
    }
    // make sure both objects have well defined geometry level
    // note: we will deanimate it again
    const_cast<Object*>(this)->AnimateGeometry();
    const_cast<Object*>(with)->AnimateGeometry();

    // minMax may be invalid now
    thisGeom->RecalculateNormalsAsNeeded();
    withGeom->RecalculateNormalsAsNeeded();

#if PERF_ISECT
#endif

    Matrix4Val withToThis = thisPos.GetInvTransform() * withPos;

// draw min-max box positions
#if DIAG_INTERSECT
    if (CHECK_DIAG(DECollision))
    {
        // draw bbox of this and with
        DiagBBox(thisGeom->MinMax(), thisPos, PackedColor(Color(0, 0, 1, 0.5)));
        DiagBBox(withGeom->MinMax(), withPos, PackedColor(Color(0, 1, 0, 0.5)));