+/* Magic Numbers: r0 = ( 1, 0, 0 )
+ * r1 = ( -1/3, 2 sqrt(2) / 3, 0 )
+ * r2 = ( -1/3, -sqrt(2) / 3, sqrt(6) / 3 )
+ * r3 = ( -1/3, -sqrt(2) / 3, -sqrt(6) / 3 )
+ * |r0| = |r1| = |r2| = |r3| = 1
+ * Distance between any two points is 2 sqrt(6) / 3
+ *
+ * Normals: The unit normals are simply the negative of the coordinates of the point not on the surface.
+ */
+
+#define NUM_TETR_FACES 4
+
+static GLdouble tet_r[4][3] = { { 1.0, 0.0, 0.0 },
+ { -0.333333333333, 0.942809041582, 0.0 },
+ { -0.333333333333, -0.471404520791, 0.816496580928 },
+ { -0.333333333333, -0.471404520791, -0.816496580928 } } ;
+
+static GLint tet_i[4][3] = /* Vertex indices */
+{
+ { 1, 3, 2 }, { 0, 2, 3 }, { 0, 3, 1 }, { 0, 1, 2 }
+} ;
+