Support for arbitrary sized vectors - (was limited by 2-4 previously)

patch http://codereview.appspot.com/5482043
from Andrew Hale

* Text from the submission *

This patch adds the ability to use arbitrary sized vectors from mathutils.
Currently vectors are only of size 2, 3 or 4 since they are generally restricted
to geometric applications. However, we can use arbitrary sized vectors for
efficient calculations and data manipulation.

2 files changed, 10 insertions, 0 deletions

diff --git a/source/blender/blenlib/BLI_math_vector.h b/source/blender/blenlib/BLI_math_vector.h
index d8e880a9dec..e9e44ed7b2c 100644
--- a/source/blender/blenlib/BLI_math_vector.h
+++ b/source/blender/blenlib/BLI_math_vector.h
@@ -198,6 +198,7 @@ double dot_vn_vn(const float *array_src_a, const float *array_src_b, const int s
 float normalize_vn_vn(float *array_tar, const float *array_src, const int size);
 float normalize_vn(float *array_tar, const int size);
 void range_vn_i(int *array_tar, const int size, const int start);
+void range_vn_fl(float *array_tar, const int size, const float start, const float step);
 void negate_vn(float *array_tar, const int size);
 void negate_vn_vn(float *array_tar, const float *array_src, const int size);
 void mul_vn_fl(float *array_tar, const int size, const float f);
diff --git a/source/blender/blenlib/intern/math_vector.c b/source/blender/blenlib/intern/math_vector.c
index a9ea90ef555..590a48e8085 100644
--- a/source/blender/blenlib/intern/math_vector.c
+++ b/source/blender/blenlib/intern/math_vector.c
@@ -416,6 +416,15 @@ void range_vn_i(int *array_tar, const int size, const int start)
 	while(i--) { *(array_pt--) = j--; }
 }
 
+void range_vn_fl(float *array_tar, const int size, const float start, const float step)
+{
+	float *array_pt= array_tar + (size-1);
+	int i= size;
+	while(i--) {
+		*(array_pt--) = start + step * (float)(i);
+	}
+}
+
 void negate_vn(float *array_tar, const int size)
 {
 	float *array_pt= array_tar + (size-1);