//----------------------------------------------------------------//
bool USSurface2D::GetTouch ( ZLVec2D& sphereLoc, ZLSurfaceTouch2D& touch ) {
// The usual stuff...
float dist = ZLDist::PointToPlane2D ( sphereLoc, *this );
if ( dist <= 0.0f ) return false;
if ( dist > 1.001f ) return false;
// Get the point of first contact on the polygon...
ZLVec2D pofcop = this->mNorm;
pofcop.Reverse ();
pofcop.Add ( sphereLoc );
this->ClampPoint ( pofcop );
ZLVec2D ray = pofcop;
ray.Sub ( sphereLoc );
dist = ray.NormSafe ();
if ( dist >= touch.mDist ) return false;
float dot = ray.Dot ( touch.mFinger );
if ( dot < 0.85f ) return false;
// we have a touch...
touch.mDist = dist;
touch.mPoint = pofcop;
touch.mTouch = true;
touch.mHit = !touch.mPrevTouch;
//touch.mNorm = this->GetNorm ();
return true;
}
//----------------------------------------------------------------//
bool USSurface2D::GetContact ( ZLVec2D& sphereLoc, ZLVec2D& contact, ZLVec2D& norm ) {
// The usual stuff...
float dist = ZLDist::PointToPlane2D ( sphereLoc, *this );
if ( dist <= 0.0f ) return false;
if ( dist > 1.001f ) return false;
// Get the point of first contact on the polygon...
contact = this->mNorm;
contact.Reverse ();
contact.Add ( sphereLoc );
this->ClampPoint ( contact );
norm = sphereLoc;
norm.Sub ( contact );
dist = norm.NormSafe ();
if ( dist > 1.001f ) return false;
return true;
}