--- /dev/null
+/*
+ * $Id: util3d.h,v 1.13 2005/12/05 04:25:18 sfeam Exp $
+ */
+
+/* GNUPLOT - util3d.h */
+
+/*[
+ * Copyright 1986 - 1993, 1998, 1999, 2004 Thomas Williams, Colin Kelley
+ *
+ * Permission to use, copy, and distribute this software and its
+ * documentation for any purpose with or without fee is hereby granted,
+ * provided that the above copyright notice appear in all copies and
+ * that both that copyright notice and this permission notice appear
+ * in supporting documentation.
+ *
+ * Permission to modify the software is granted, but not the right to
+ * distribute the complete modified source code. Modifications are to
+ * be distributed as patches to the released version. Permission to
+ * distribute binaries produced by compiling modified sources is granted,
+ * provided you
+ * 1. distribute the corresponding source modifications from the
+ * released version in the form of a patch file along with the binaries,
+ * 2. add special version identification to distinguish your version
+ * in addition to the base release version number,
+ * 3. provide your name and address as the primary contact for the
+ * support of your modified version, and
+ * 4. retain our contact information in regard to use of the base
+ * software.
+ * Permission to distribute the released version of the source code along
+ * with corresponding source modifications in the form of a patch file is
+ * granted with same provisions 2 through 4 for binary distributions.
+ *
+ * This software is provided "as is" without express or implied warranty
+ * to the extent permitted by applicable law.
+]*/
+
+#ifndef GNUPLOT_UTIL3D_H
+# define GNUPLOT_UTIL3D_H
+
+/* HBB 990828: moved all those variable decl's and #defines to new
+ * file "graph3d.h", as the definitions are in graph3d.c, not in
+ * util3d.c. Include that file from here, to ensure everything is
+ * known */
+
+#include "graph3d.h"
+
+/* All the necessary information about one vertex. */
+typedef struct vertex {
+ coordval x, y, z; /* vertex coordinates */
+ lp_style_type *lp_style; /* where to find point symbol type (if any) */
+ coordval real_z;
+#ifdef EAM_DATASTRINGS
+ struct text_label *label;
+#endif
+#ifdef HIDDEN3D_VAR_PTSIZE /* Needed for variable pointsize, but takes space */
+ struct coordinate *original;
+#endif
+} vertex;
+typedef vertex GPHUGE * p_vertex;
+
+
+/* Utility macros for vertices: */
+#define FLAG_VERTEX_AS_UNDEFINED(v) \
+ do { (v).z = -2.0; } while (0)
+#define VERTEX_IS_UNDEFINED(v) ((v).z == -2.0)
+#define V_EQUAL(a,b) ( GE(0.0, fabs((a)->x - (b)->x) + \
+ fabs((a)->y - (b)->y) + fabs((a)->z - (b)->z)) )
+
+
+/* Maps from normalized space to terminal coordinates */
+#define TERMCOORD(v,xvar,yvar) \
+{ \
+ xvar = ((int)((v)->x * xscaler)) + xmiddle; \
+ yvar = ((int)((v)->y * yscaler)) + ymiddle; \
+}
+
+/* Prototypes of functions exported by "util3d.c" */
+
+void edge3d_intersect __PROTO((struct coordinate GPHUGE *, int, double *, double *, double *));
+TBOOLEAN two_edge3d_intersect __PROTO((struct coordinate GPHUGE *, int, double *, double *, double *));
+void mat_scale __PROTO((double sx, double sy, double sz, double mat[4][4]));
+void mat_rot_x __PROTO((double teta, double mat[4][4]));
+void mat_rot_z __PROTO((double teta, double mat[4][4]));
+void mat_mult __PROTO((double mat_res[4][4], double mat1[4][4], double mat2[4][4]));
+void map3d_xyz __PROTO((double x, double y, double z, p_vertex out));
+void map3d_xy __PROTO((double x, double y, double z, unsigned int *xt, unsigned int *yt));
+void map3d_xy_double __PROTO((double x, double y, double z, double *xt, double *yt));
+void draw3d_line __PROTO((p_vertex, p_vertex, struct lp_style_type *));
+void draw3d_line_unconditional __PROTO((p_vertex, p_vertex, struct lp_style_type *, int));
+void draw3d_point __PROTO((p_vertex v, struct lp_style_type *lp));
+
+/* HBB NEW 20031218: 3D polyline support */
+void polyline3d_start __PROTO((p_vertex v1));
+void polyline3d_next __PROTO((p_vertex v2, struct lp_style_type *lp));
+
+#endif /* GNUPLOT_UTIL3D_H */
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