fix [#25975] Quaternion/Vector.negated() isn't available

theres no need for value.negated(), better use -vec / -quat. however -quat didn't exist.

3 files changed, 24 insertions, 1 deletions

diff --git a/source/blender/blenlib/BLI_math_vector.h b/source/blender/blenlib/BLI_math_vector.h
index 16b8ff8e472..dcb9311baa0 100644
--- a/source/blender/blenlib/BLI_math_vector.h
+++ b/source/blender/blenlib/BLI_math_vector.h
@@ -85,6 +85,7 @@ MINLINE void madd_v4_v4fl(float r[4], const float a[4], float f);
 MINLINE void negate_v3(float r[3]);
 MINLINE void negate_v3_v3(float r[3], const float a[3]);
 MINLINE void negate_v4(float r[4]);
+MINLINE void negate_v4_v4(float r[4], const float a[3]);
 
 MINLINE float dot_v2v2(const float a[2], const float b[2]);
 MINLINE float dot_v3v3(const float a[3], const float b[3]);
diff --git a/source/blender/blenlib/intern/math_vector_inline.c b/source/blender/blenlib/intern/math_vector_inline.c
index ae1b443bc56..2f808e5d74e 100644
--- a/source/blender/blenlib/intern/math_vector_inline.c
+++ b/source/blender/blenlib/intern/math_vector_inline.c
@@ -290,6 +290,14 @@ MINLINE void negate_v4(float r[4])
 	r[3]= -r[3];
 }
 
+MINLINE void negate_v4_v4(float r[4], const float a[4])
+{
+	r[0]= -a[0];
+	r[1]= -a[1];
+	r[2]= -a[2];
+	r[3]= -a[3];
+}
+
 MINLINE float dot_v2v2(const float a[2], const float b[2])
 {
 	return a[0]*b[0] + a[1]*b[1];
diff --git a/source/blender/python/generic/mathutils_quat.c b/source/blender/python/generic/mathutils_quat.c
index 56757ae5d2d..b28ef866fea 100644
--- a/source/blender/python/generic/mathutils_quat.c
+++ b/source/blender/python/generic/mathutils_quat.c
@@ -744,6 +744,20 @@ static PyObject *Quaternion_mul(PyObject *q1, PyObject *q2)
 	return NULL;
 }
 
+/* -obj
+  returns the negative of this object*/
+static PyObject *Quaternion_neg(QuaternionObject *self)
+{
+	float tquat[QUAT_SIZE];
+
+	if(!BaseMath_ReadCallback(self))
+		return NULL;
+
+	negate_v4_v4(tquat, self->quat);
+	return newQuaternionObject(tquat, Py_NEW, Py_TYPE(self));
+}
+
+
 //-----------------PROTOCOL DECLARATIONS--------------------------
 static PySequenceMethods Quaternion_SeqMethods = {
 	(lenfunc) Quaternion_len,				/* sq_length */
@@ -771,7 +785,7 @@ static PyNumberMethods Quaternion_NumMethods = {
 	0,							/*nb_remainder*/
 	0,							/*nb_divmod*/
 	0,							/*nb_power*/
-	(unaryfunc) 	0,	/*nb_negative*/
+	(unaryfunc) 	Quaternion_neg,	/*nb_negative*/
 	(unaryfunc) 	0,	/*tp_positive*/
 	(unaryfunc) 	0,	/*tp_absolute*/
 	(inquiry)	0,	/*tp_bool*/