nviz_cmd: north arrow added

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@47063 15284696-431f-4ddb-bdfa-cd5b030d7da7

visualization/nviz2/cmd/args.c

@@ -32,6 +32,7 @@ static void args_volume(struct GParams *);
 static void args_lighting(struct GParams *);
 static void args_fringe(struct GParams *);
 static void args_cplane(struct GParams *);
+static void args_arrow(struct GParams *);
 
 /*!
   \brief Parse command
@@ -76,7 +77,10 @@ void parse_command(int argc, char *argv[], struct GParams *params)
     args_fringe(params);
 
     /*** cutting plane ***/
-    args_cplane(params);    
+    args_cplane(params);
+
+    /*** north arrow ***/
+    args_arrow(params);
     
     /*** output image ***/
     /* output */
@@ -783,6 +787,35 @@ void args_fringe(struct GParams *params)
     params->fringe_elev->answer = "55";
 }
 
+void args_arrow(struct GParams *params)
+{
+    params->north_arrow = G_define_option();
+    params->north_arrow->key = "arow_position";
+    params->north_arrow->key_desc = "x,y";
+    params->north_arrow->type = TYPE_INTEGER;
+    params->north_arrow->required = NO;
+    params->north_arrow->multiple = NO;
+    params->north_arrow->description = _("Place north arrow at given position \
+	(in screen coordinates from bottom left corner)");
+    params->north_arrow->guisection = _("Decoration");
+    
+    params->north_arrow_size = G_define_option();
+    params->north_arrow_size->key = "arow_size";
+    params->north_arrow_size->key_desc = "value";
+    params->north_arrow_size->type = TYPE_DOUBLE;
+    params->north_arrow_size->required = NO;
+    params->north_arrow_size->multiple = NO;
+    params->north_arrow_size->description = _("North arrow size (in map units)");
+    params->north_arrow_size->guisection = _("Decoration");
+    
+    params->north_arrow_color = G_define_standard_option(G_OPT_C_FG);
+    params->north_arrow_color->key = "arow_color";
+    params->north_arrow_color->required = NO;
+    params->north_arrow_color->multiple = NO;
+    params->north_arrow_color->label = _("North arrow color");
+    params->north_arrow_color->guisection = _("Decoration");
+    params->north_arrow_color->answer = "black";
+}
 /*!
    \brief Get number of answers of given option
 

visualization/nviz2/cmd/local_proto.h

@@ -27,7 +27,7 @@ struct GParams
     /* misc */
 	*exag, *bgcolor,
     /* cutting planes */
-    *cplane, *cplane_pos, *cplane_rot, *cplane_tilt, *cplane_shading,
+       *cplane, *cplane_pos, *cplane_rot, *cplane_tilt, *cplane_shading,
     /* viewpoint */
 	*pos, *height, *persp, *twist, *focus,
     /* output */
@@ -35,7 +35,9 @@ struct GParams
     /* lighting */
 	*light_pos, *light_color, *light_bright, *light_ambient,
     /* fringe */
-	*fringe, *fringe_color, *fringe_elev;
+	*fringe, *fringe_color, *fringe_elev,
+    /* north arrow */
+	*north_arrow, *north_arrow_size, *north_arrow_color;
 };
 
 /* args.c */

visualization/nviz2/cmd/main.c

@@ -33,7 +33,8 @@ int main(int argc, char *argv[])
     struct GParams *params;
 
     int i, ret;
-    int red, grn, blu;
+    int red, grn, blu, sx, sy;
+    float size;
     double vp_height, z_exag;	/* calculated viewpoint height, z-exag */
     int width, height;		/* output image size */
     char *output_name;
@@ -191,7 +192,21 @@ int main(int argc, char *argv[])
 	Nviz_new_fringe(&data, -1, Nviz_color_from_str(params->fringe_color->answer),
 			atof(params->fringe_elev->answer), nw, ne, sw, se);
     }
-    
+
+    /* draw north arrow */
+    if (params->north_arrow->answer) {
+	
+	if (!params->north_arrow_size->answer)
+	    size = Nviz_get_longdim(&data) / 8.;
+	else
+	    size = atof(params->north_arrow_size->answer);
+
+	Nviz_set_arrow(&data, atoi(params->north_arrow->answers[0]),
+			      atoi(params->north_arrow->answers[1]),
+			      size, Nviz_color_from_str(params->north_arrow_color->answer));
+	Nviz_draw_arrow(&data);
+    }
+
     GS_clear(data.bgcolor);
 
     /* cutting planes */