From 5bea21e81ed516440e34e480f2c33ca41aa8c597 Mon Sep 17 00:00:00 2001
From: Bryan Newbold <bnewbold@robocracy.org>
Date: Mon, 20 Feb 2017 00:05:36 -0800
Subject: Import Upstream version 3a4

---
 solid.scm | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)

(limited to 'solid.scm')

diff --git a/solid.scm b/solid.scm
index f0b1666..064e21e 100644
--- a/solid.scm
+++ b/solid.scm
@@ -570,6 +570,22 @@
 	      (solid:node "Box" (sprintf #f "size %s"
 					 (coordinate3string geom)))))
 
+;;@body
+;;Returns a box of the specified @1, but with the y-axis of a texture
+;;specified in @2 being applied along the longest dimension in @1.
+(define (solid:lumber geometry appearance)
+  (define x (car geometry))
+  (define y (cadr geometry))
+  (define z (caddr geometry))
+  (cond ((and (>= y x) (>= y z))
+	 (solid:box geometry appearance))
+	((and (>= x y) (>= x z))
+	 (solid:rotation '(0 0 1) 90
+			 (solid:box (list y x z) appearance)))
+	(else
+	 (solid:rotation '(1 0 0) 90
+			 (solid:box (list x z y) appearance)))))
+
 ;;@args radius height appearance
 ;;@args radius height
 ;;Returns a right cylinder with dimensions @code{(abs @1)} and @code{(abs @2)}
@@ -693,6 +709,48 @@
 		 ((negative? idx)
 		  (apply string-append lst)))))))
 
+;;@args xz-array y appearance
+;;@args xz-array y
+;;@1 must be an @var{n}-by-2 array holding a sequence of coordinates
+;;tracing a non-intersecting clockwise loop in the x-z plane.  @0 will
+;;close the sequence if the first and last coordinates are not the
+;;same.
+;;
+;;@0 returns a capped prism @2 long.
+(define (solid:prism xz-array y . appearance)
+  (define y/2 (/ y 2))
+  (define dims (array-dimensions xz-array))
+  ;;(define (sfbool bool) (if bool "TRUE" "FALSE"))
+  (if (not (eqv? 2 (cadr dims))) (slib:error 'solid:prism 'dimensions dims))
+  (sprintf #f
+	   "\
+Shape {
+      %s
+   geometry Extrusion {
+      convex FALSE
+      endCap TRUE
+      beginCap TRUE
+      spine [0 %g 0, 0 %g 0]
+      crossSection [%s]
+   }
+}
+"
+	   (if (null? appearance) "" (car appearance))
+	   (- y/2) y/2
+	   (do ((str (if (and (= (array-ref xz-array (+ -1 (car dims)) 0)
+				 (array-ref xz-array 0 0))
+			      (= (array-ref xz-array (+ -1 (car dims)) 1)
+				 (array-ref xz-array 0 1)))
+			 ""
+			 (sprintf #f "%g, %g\n"
+				  (array-ref xz-array (+ -1 (car dims)) 0)
+				  (array-ref xz-array (+ -1 (car dims)) 1)))
+		     (string-append str (sprintf #f "      %g, %g\n"
+						 (array-ref xz-array idx 0)
+						 (array-ref xz-array idx 1))))
+		(idx 0 (+ 1 idx)))
+	       ((>= idx (car dims)) str))))
+
 ;;@args width height depth colorray appearance
 ;;@args width height depth appearance
 ;;@args width height depth
-- 
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