initial upload

lib/geometry.h

@@ -0,0 +1,37 @@
+/*
+Data structures for geometric elements and functions that operate on them.
+Defines the TESSEROID, SPHERE, and PRISM structures.
+*/
+
+#ifndef _TESSEROIDS_GEOMETRY_H_
+#define _TESSEROIDS_GEOMETRY_H_
+
+
+/* Store information on a tesseroid */
+typedef struct tess_struct {
+    /* s, n, w, e in degrees. r1 and r2 are the smaller and larger radius */
+    double density; /* in SI units */
+    double w; /* western longitude border in degrees */
+    double e; /* eastern longitude border in degrees */
+    double s; /* southern latitude border in degrees */
+    double n; /* northern latitude border in degrees */
+    double r1; /* smallest radius border in SI units */
+    double r2; /* largest radius border in SI units */
+	  double suscept; /* magnetic susceptibility */
+	  double Bx; /* x-component of ambient magnetic field */
+	  double By; /* y-component of ambient magnetic field */
+	  double Bz; /* z-component of ambient magnetic field */
+
+    double cos_a1;
+    double sin_a1;
+    double cos_b1;
+    double sin_b1;
+	//double Rx;
+	//double Ry;
+	//double Rz;
+} TESSEROID;
+
+
+void split_tess(TESSEROID tess, TESSEROID *split);
+
+#endif