Index: work/openscad/line_speed/README
===================================================================
--- work/openscad/line_speed/README	(revision 37239)
+++ work/openscad/line_speed/README	(revision 37240)
@@ -4,3 +4,12 @@
 
 Workaround #1: pixmap/: export pixmap data and use that as height map; compiles
 fast, renders slow.
+
+Workaround #2: poly/: an openscad polygon object is an outer contour and
+multiple inner contours subtracted from it. It'd be possible to use librnd
+poly lib to "invert" a copper/silk layer by subtracting it from a rectangle;
+the resulting contour could be spliced and used as poly holes on the same
+initial rectangle in openscad. Results in a single poly obj. It's somewhat
+slow to calculate it during compilation and rendering is slow too.
+
+
Index: work/openscad/line_speed/poly/A.scad
===================================================================
--- work/openscad/line_speed/poly/A.scad	(nonexistent)
+++ work/openscad/line_speed/poly/A.scad	(revision 37240)
@@ -0,0 +1,30 @@
+use <P.scad>
+
+// Round cap line
+module pcb_line_rc(x1, y1, length, angle, width, thick) {
+	translate([x1,y1,0]) {
+union() {
+
+		rotate([0,0,angle]) {
+			translate([length/2+2, 0, 0])
+				cube([length-8, width, thick], center=true);
+//			cylinder(r=width/2, h=thick, center=true, $fn=3);
+//			translate([length, 0, 0])
+//				cylinder(r=width/2, h=thick, center=true, $fn=3);
+		}
+	}
+	}
+}
+
+
+if (0)
+for(y=[1:8000]) {
+	pcb_line_rc(1, y, 20, 0, 0.5, 0.1);
+	pcb_line_rc(41, y, 20, 0, 0.5, 0.1);
+//	pcb_line_rc(21, y, 20, 0, 0.5, 0.1);
+}
+
+
+//linear_extrude(height=1)
+	drawing();
+
Index: work/openscad/line_speed/poly/gen.sh
===================================================================
--- work/openscad/line_speed/poly/gen.sh	(nonexistent)
+++ work/openscad/line_speed/poly/gen.sh	(revision 37240)
@@ -0,0 +1,27 @@
+#!/bin/sh
+awk '
+BEGIN {
+	sx = 90;
+	sy = 90;
+	pt = "[-1,-1], ["sx+1", -1], ["sx+1", "sy+1"], [-1, "sy+1"]"
+	pts = 4;
+	paths = "[0,1,2,3]";
+
+	for(y = 0; y < sx; y++) {
+		for(x = 0; x < sy; x++) {
+			paths = paths ", ["
+			for(a = 0; a < 2*3.1415; a+=0.4) {
+				pt = pt ", [" x + cos(a)*0.6 "," y + sin(a)*0.6 "]"
+				paths = paths ((a == 0) ? "":",") pts
+				pts++
+			}
+			paths = paths "]"
+		}
+	}
+
+	print "module drawing() {"
+	print "	polygon(points=[" pt "], paths=[" paths "], convexity=10);"
+	print "}"
+}
+' > P.scad
+

Property changes on: work/openscad/line_speed/poly/gen.sh
___________________________________________________________________
Added: svn:executable
## -0,0 +1 ##
+*
\ No newline at end of property