cleaned up code for mtx_qhull

svn path=/trunk/externals/iem/iemmatrix/; revision=16183

1 files changed, 35 insertions, 25 deletions

diff --git a/src/mtx_qhull/vectors.h b/src/mtx_qhull/vectors.h
index 06a302a..3267df9 100644
--- a/src/mtx_qhull/vectors.h
+++ b/src/mtx_qhull/vectors.h
@@ -4,6 +4,16 @@
 #include <math.h>
 #include <stdlib.h>
 #include <stdio.h>
+
+/*
+ *  vector operations for zhull
+ *
+ * Copyright (c) 2012, Franz Zotter
+ * IEM, Graz, Austria
+ * 
+ *
+ */
+
 typedef struct vec_ {
     float c[3];
 } vector_t;
@@ -24,43 +34,43 @@ typedef struct line_ {
 } line_t;
 
 
-vector_t initVector (float x, float y, float z);
-float lengthVector(vector_t v);
-vector_t normalizeVector(vector_t v);
+vector_t initVector (const float x, const float y, const float z);
+float lengthVector(const vector_t v);
+vector_t normalizeVector(const vector_t v);
 
-plane_t initPlane (vector_t normal, vector_t point);
-line_t initLine (vector_t direction, vector_t point);
+plane_t initPlane (vector_t normal, const vector_t point);
+line_t initLine (vector_t direction, const vector_t point);
 
 points_t initPoints (const float *x,
         const float *y, const float *z, 
-        size_t num_points);
+        const size_t num_points);
 void freePoints (points_t *points);
 size_t getNumPoints(const points_t points);
 vector_t getPoint(const points_t points, const index_t index);
 
-vector_t crossProduct (vector_t v1, vector_t v2);
-float innerProduct (vector_t v1, vector_t v2);
+vector_t crossProduct (const vector_t v1, const vector_t v2);
+float innerProduct (const vector_t v1, const vector_t v2);
 float distancePointPoint(const vector_t a, const vector_t b);
-float distancePointPlane (vector_t point, plane_t plane);
-float distancePointLine (vector_t point, line_t line);
-float distancePointLineOnPlane (vector_t point, 
-        line_t line, plane_t plane);
-vector_t addVectors(vector_t v1, vector_t v2);
-vector_t subtractVectors(vector_t v1, vector_t v2);
-vector_t scaleVector(vector_t v1, float f);
+float distancePointPlane (const vector_t point, const plane_t plane);
+float distancePointLine (const vector_t point, const line_t line);
+float distancePointLineOnPlane (const vector_t point, 
+        const line_t line, const plane_t plane);
+vector_t addVectors(const vector_t v1, const vector_t v2);
+vector_t subtractVectors(const vector_t v1, const vector_t v2);
+vector_t scaleVector(vector_t v1, const float f);
 /*vector_t averagePoints(points_t points);
 vector_t normalOfPoints(points_t points);
 plane_t planeFromPoints(points_t points);*/
-plane_t planeFromThreePoints (vector_t a, vector_t b, vector_t c);
-line_t lineFromTwoPoints (vector_t a, vector_t b);
+plane_t planeFromThreePoints (const vector_t a, const vector_t b, const vector_t c);
+line_t lineFromTwoPoints (const vector_t a, const vector_t b);
 
-vector_t averageListedPoints(points_t points, list_t list);
-vector_t normalOfListedPoints(points_t points, list_t list);
-vector_t directionOfListedPoints(points_t points, list_t list);
-plane_t planeFromListedPoints(points_t points, list_t list);
-line_t lineFromListedPoints(points_t points, list_t list);
+vector_t averageListedPoints(const points_t points, const list_t list);
+vector_t normalOfListedPoints(const points_t points, const list_t list);
+vector_t directionOfListedPoints(const points_t points, const list_t list);
+plane_t planeFromListedPoints(const points_t points, const list_t list);
+line_t lineFromListedPoints(const points_t points, const list_t list);
 
-void printPlane(plane_t p);
-void printLine(line_t l);
-void printVector(vector_t v);
+void printPlane(const plane_t p);
+void printLine(const line_t l);
+void printVector(const vector_t v);
 #endif /* QHULL_VECTOR_H */