diff options
| author | Tofu Buzzard <no-email> | 2011-02-17 16:33:55 -0800 |
|---|---|---|
| committer | Tofu Buzzard <no-email> | 2011-02-17 16:33:55 -0800 |
| commit | f4d1a1af7dccc5f4d47547320fce47555b7d8ca9 (patch) | |
| tree | 0d04e7e3bb11fde18069189be67c73f3aa662b37 /indra/llmath/m4math.h | |
| parent | aa246374cc513f264ea620521a6df8e430a646f3 (diff) | |
| parent | a5bc626ee32765774066397e803cc01bd663380c (diff) | |
merge
Diffstat (limited to 'indra/llmath/m4math.h')
| -rw-r--r-- | indra/llmath/m4math.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/indra/llmath/m4math.h b/indra/llmath/m4math.h index 10c88464e5..3588f36758 100644 --- a/indra/llmath/m4math.h +++ b/indra/llmath/m4math.h @@ -132,6 +132,7 @@ public: // various useful matrix functions const LLMatrix4& setIdentity(); // Load identity matrix + bool isIdentity() const; const LLMatrix4& setZero(); // Clears matrix to all zeros. const LLMatrix4& initRotation(const F32 angle, const F32 x, const F32 y, const F32 z); // Calculate rotation matrix by rotating angle radians about (x, y, z) @@ -262,6 +263,30 @@ inline const LLMatrix4& LLMatrix4::setIdentity() return (*this); } +inline bool LLMatrix4::isIdentity() const +{ + return + mMatrix[0][0] == 1.f && + mMatrix[0][1] == 0.f && + mMatrix[0][2] == 0.f && + mMatrix[0][3] == 0.f && + + mMatrix[1][0] == 0.f && + mMatrix[1][1] == 1.f && + mMatrix[1][2] == 0.f && + mMatrix[1][3] == 0.f && + + mMatrix[2][0] == 0.f && + mMatrix[2][1] == 0.f && + mMatrix[2][2] == 1.f && + mMatrix[2][3] == 0.f && + + mMatrix[3][0] == 0.f && + mMatrix[3][1] == 0.f && + mMatrix[3][2] == 0.f && + mMatrix[3][3] == 1.f; +} + /* inline LLMatrix4 operator*(const LLMatrix4 &a, const LLMatrix4 &b) |