acos

2 files changed, 5 insertions, 5 deletions

diff --git a/src/core/FileLoader.cpp b/src/core/FileLoader.cpp
index 8fb4b4d9..b49fccbb 100644
--- a/src/core/FileLoader.cpp
+++ b/src/core/FileLoader.cpp
@@ -679,7 +679,7 @@ CFileLoader::LoadMLOInstance(int id, const char *line)
 		&scale.x, &scale.y, &scale.z,
 		&rot.x, &rot.y, &rot.z,
 		&angle);
-	float rad = 2.0f * (PI / 2.0f - Atan2(angle, Sqrt(1.0f - SQR(angle))));
+	float rad = Acos(angle) * 2.0f;
 	CInstance *inst = CModelInfo::GetMloInstanceStore().alloc();
 	minfo->lastInstance++;
 
diff --git a/src/peds/PedIK.cpp b/src/peds/PedIK.cpp
index c8f0409f..bfc9186d 100644
--- a/src/peds/PedIK.cpp
+++ b/src/peds/PedIK.cpp
@@ -344,11 +344,11 @@ void
 CPedIK::ExtractYawAndPitchWorld(RwMatrixTag *mat, float *yaw, float *pitch)
 {
 	float f = clamp(DotProduct(mat->up, CVector(0.0f, 1.0f, 0.0f)), -1.0f, 1.0f);
-	*yaw = HALFPI - Atan2(f, Sqrt(1.0f - f * f));
+	*yaw = Acos(f);
 	if (mat->up.x > 0.0f) *yaw = -*yaw;
 
 	f = clamp(DotProduct(mat->right, CVector(0.0f, 0.0f, 1.0f)), -1.0f, 1.0f);
-	*pitch = HALFPI - Atan2(f, Sqrt(1.0f - f * f));
+	*pitch = Acos(f);
 	if (mat->up.z > 0.0f) *pitch = -*pitch;
 }
 
@@ -356,11 +356,11 @@ void
 CPedIK::ExtractYawAndPitchLocal(RwMatrixTag *mat, float *yaw, float *pitch)
 {
 	float f = clamp(DotProduct(mat->at, CVector(0.0f, 0.0f, 1.0f)), -1.0f, 1.0f);
-	*yaw = HALFPI - Atan2(f, Sqrt(1.0f - f * f));
+	*yaw = Acos(f);
 	if (mat->at.y > 0.0f) *yaw = -*yaw;
 
 	f = clamp(DotProduct(mat->right, CVector(1.0f, 0.0f, 0.0f)), -1.0f, 1.0f);
-	*pitch = HALFPI - Atan2(f, Sqrt(1.0f - f * f));
+	*pitch = Acos(f);
 	if (mat->up.x > 0.0f) *pitch = -*pitch;
 }