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LineCoeff Doc

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This commit is contained in:
andrew 2014-03-11 18:10:15 +02:00
parent b4bf13aa4f
commit d64db443c2
1 changed files with 20 additions and 4 deletions
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24
src/Vector3.h
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@ -10,10 +10,6 @@
template <typename T> template <typename T>
// tolua_begin // tolua_begin
class Vector3 class Vector3
@ -196,6 +192,11 @@ public:
); );
} }
/** Returns the coefficient for the (a_OtherEnd - this) line to reach the specified Z coord.
The result satisfies the following equation:
(*this + Result * (a_OtherEnd - *this)).z = a_Z
If the line is too close to being parallel, this function returns NO_INTERSECTION
*/
inline double LineCoeffToXYPlane(const Vector3<T> & a_OtherEnd, T a_Z) const inline double LineCoeffToXYPlane(const Vector3<T> & a_OtherEnd, T a_Z) const
{ {
if (abs(z - a_OtherEnd.z) < EPS) if (abs(z - a_OtherEnd.z) < EPS)
@ -206,6 +207,11 @@ public:
return (a_Z - z) / (a_OtherEnd.z - z); return (a_Z - z) / (a_OtherEnd.z - z);
} }
/** Returns the coefficient for the (a_OtherEnd - this) line to reach the specified Y coord.
The result satisfies the following equation:
(*this + Result * (a_OtherEnd - *this)).y = a_Y
If the line is too close to being parallel, this function returns NO_INTERSECTION
*/
inline double LineCoeffToXZPlane(const Vector3<T> & a_OtherEnd, T a_Y) const inline double LineCoeffToXZPlane(const Vector3<T> & a_OtherEnd, T a_Y) const
{ {
if (abs(y - a_OtherEnd.y) < EPS) if (abs(y - a_OtherEnd.y) < EPS)
@ -216,6 +222,11 @@ public:
return (a_Y - y) / (a_OtherEnd.y - y); return (a_Y - y) / (a_OtherEnd.y - y);
} }
/** Returns the coefficient for the (a_OtherEnd - this) line to reach the specified X coord.
The result satisfies the following equation:
(*this + Result * (a_OtherEnd - *this)).x = a_X
If the line is too close to being parallel, this function returns NO_INTERSECTION
*/
inline double LineCoeffToYZPlane(const Vector3<T> & a_OtherEnd, T a_X) const inline double LineCoeffToYZPlane(const Vector3<T> & a_OtherEnd, T a_X) const
{ {
if (abs(x - a_OtherEnd.x) < EPS) if (abs(x - a_OtherEnd.x) < EPS)
@ -231,9 +242,14 @@ public:
/** Return value of LineCoeffToPlane() if the line is parallel to the plane. */ /** Return value of LineCoeffToPlane() if the line is parallel to the plane. */
static const double NO_INTERSECTION; static const double NO_INTERSECTION;
}; };
// tolua_end // tolua_end
template <typename T> template <typename T>
const double Vector3<T>::EPS = 0.000001; const double Vector3<T>::EPS = 0.000001;