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Added Matrix4::GetDeterminantAffine 

Former-commit-id: 404098cc552509039c38e7449b167dbab0385008
This commit is contained in:
Lynix 2013-03-21 18:29:50 +01:00
parent a65a6f14b5
commit c7fdf25432
2 changed files with 19 additions and 13 deletions
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1
include/Nazara/Math/Matrix4.hpp
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@ -37,6 +37,7 @@ class NzMatrix4
NzMatrix4& ConcatenateAffine(const NzMatrix4& matrix);
T GetDeterminant() const;
T GetDeterminantAffine() const;
bool GetInverse(NzMatrix4* dest) const;
bool GetInverseAffine(NzMatrix4* dest) const;
NzQuaternion<T> GetRotation() const;

31
include/Nazara/Math/Matrix4.inl
View File

@ -139,6 +139,16 @@ T NzMatrix4<T>::GetDeterminant() const
return m11*A - m21*B + m31*C - m41*D;
}
template<typename T>
T NzMatrix4<T>::GetDeterminantAffine() const
{
T A = m22*m33 - m32*m23;
T B = m12*m33 - m32*m13;
T C = m12*m23 - m22*m13;
return m11*A - m21*B + m31*C;
}
template<typename T>
bool NzMatrix4<T>::GetInverse(NzMatrix4* dest) const
{
@ -286,7 +296,13 @@ template<typename T>
bool NzMatrix4<T>::GetInverseAffine(NzMatrix4* dest) const
{
///DOC: Il est possible d'appeler cette méthode avec la même matrice en argument qu'en appelant
#ifdef NAZARA_DEBUG
#if NAZARA_MATH_SAFE
if (!IsAffine())
{
NazaraError("Matrix is not affine");
return false;
}
if (!dest)
{
NazaraError("Destination matrix must be valid");
@ -294,7 +310,7 @@ bool NzMatrix4<T>::GetInverseAffine(NzMatrix4* dest) const
}
#endif
T det = GetDeterminant();
T det = GetDeterminantAffine();
if (!NzNumberEquals(det, F(0.0)))
{
// http://stackoverflow.com/questions/1148309/inverting-a-4x4-matrix
@ -432,17 +448,6 @@ NzMatrix4<T>& NzMatrix4<T>::Inverse(bool* succeeded)
template<typename T>
NzMatrix4<T>& NzMatrix4<T>::InverseAffine(bool* succeeded)
{
#if NAZARA_MATH_SAFE
if (!IsAffine())
{
NazaraError("Matrix not affine");
if (succeeded)
*succeeded = false;
return *this;
}
#endif
bool result = GetInverseAffine(this);
if (succeeded)
*succeeded = result;