Julie Newcomb / LSM303DLHC-a

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Dependents:   mbed_accelerometer

Fork of LSM303DLHC by brian claus

Files at this revision

API Documentation at this revision

Revision 5:762e7cfed86f, committed 2014-09-29

Comitter:
jn80842
Date:
Mon Sep 29 08:51:35 2014 +0000
Parent:
4:612f7d5a822d
Commit message:
tweak to work with frdm-kl25z

Changed in this revision

vector.cpp Show annotated file Show diff for this revision Revisions of this file
vector.h Show annotated file Show diff for this revision Revisions of this file 
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vector.cpp	Mon Sep 29 08:51:35 2014 +0000
@@ -0,0 +1,22 @@
+#include <vector.h>
+#include <math.h>
+
+void vector_cross(const vector *a,const vector *b, vector *out)
+{
+  out->x = a->y*b->z - a->z*b->y;
+  out->y = a->z*b->x - a->x*b->z;
+  out->z = a->x*b->y - a->y*b->x;
+}
+
+float vector_dot(const vector *a,const vector *b)
+{
+  return a->x*b->x+a->y*b->y+a->z*b->z;
+}
+
+void vector_normalize(vector *a)
+{
+  float mag = sqrt(vector_dot(a,a));
+  a->x /= mag;
+  a->y /= mag;
+  a->z /= mag;
+}
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vector.h	Mon Sep 29 08:51:35 2014 +0000
@@ -0,0 +1,11 @@
+#ifndef vector_h
+#define vector_h
+typedef struct vector
+{
+  float x, y, z;
+} vector;
+
+extern void vector_cross(const vector *a, const vector *b, vector *out);
+extern float vector_dot(const vector *a,const vector *b);
+extern void vector_normalize(vector *a);
+#endif
\ No newline at end of file