Revision: 53673
http://brlcad.svn.sourceforge.net/brlcad/?rev=53673&view=rev
Author: n_reed
Date: 2012-11-14 15:24:39 +0000 (Wed, 14 Nov 2012)
Log Message:
-----------
use spacing parameters to choose number of points/curves to plot
Modified Paths:
--------------
brlcad/trunk/src/librt/primitives/epa/epa.c
Modified: brlcad/trunk/src/librt/primitives/epa/epa.c
===================================================================
--- brlcad/trunk/src/librt/primitives/epa/epa.c 2012-11-14 15:04:05 UTC (rev
53672)
+++ brlcad/trunk/src/librt/primitives/epa/epa.c 2012-11-14 15:24:39 UTC (rev
53673)
@@ -791,6 +791,19 @@
}
}
+static int
+epa_ellipse_points(
+ struct rt_epa_internal *epa,
+ const struct rt_view_info *info)
+{
+ fastf_t avg_radius, avg_circumference;
+
+ avg_radius = (epa->epa_r1 + epa->epa_r2) / 2.0;
+ avg_circumference = bn_twopi * avg_radius;
+
+ return avg_circumference / info->point_spacing;
+}
+
int
rt_epa_adaptive_plot(struct rt_db_internal *ip, const struct rt_view_info
*info)
{
@@ -800,14 +813,6 @@
struct rt_epa_internal *epa;
struct rt_pt_node *pts_r1, *pts_r2, *node, *node1, *node2;
- num_curve_points = sqrt(primitive_diagonal_samples(ip, info)) / 4.0;
-
- if (num_curve_points < 3) {
- num_curve_points = 3;
- }
-
- num_ellipse_points = 4 * num_curve_points;
-
BU_CK_LIST_HEAD(info->vhead);
RT_CK_DB_INTERNAL(ip);
@@ -816,6 +821,19 @@
return -2;
}
+ num_curve_points = primitive_curve_count(ip, info);
+
+ if (num_curve_points < 3) {
+ num_curve_points = 3;
+ }
+
+ num_ellipse_points = epa_ellipse_points(epa, info);
+
+ if (num_ellipse_points < 6) {
+ num_ellipse_points = 6;
+ }
+
+
VMOVE(epa_H, epa->epa_H);
mag_H = MAGNITUDE(epa_H);
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