add openscad and co

graph/libopencsg/Makefile

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+# Created by: Michael Reifenberger <mr@FreeBSD.org>
+# $FreeBSD: head/graphics/opencsg/Makefile 516845 2019-11-05 22:16:14Z zeising $
+
+PORTNAME=	opencsg
+PORTVERSION=	1.4.2
+CATEGORIES=	graphics
+MASTER_SITES=	http://www.opencsg.org/
+DISTNAME=	OpenCSG-${PORTVERSION}
+PKGNAMEPREFIX=  lib
+
+MAINTAINER=	mr@FreeBSD.org
+COMMENT=	Constructive Solid Geometry rendering library
+
+LIB_DEPENDS+= libGL.so:graph/libmesa
+LIB_DEPENDS+= libglapi.so:graph/libmesa
+LIB_DEPENDS+= libGLEW.so:graph/libGLEW
+
+USES=		compiler:c++11-lang gmake
+WRKSRC=		${WRKDIR}/${DISTNAME}/src
+
+DESTDIRNAME=    INSTALL_ROOT
+
+do-configure:
+	cd ${WRKSRC} && qmake .
+
+
+.include <bsd.port.mk>

graph/libopencsg/distinfo

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+TIMESTAMP = 1516550936
+SHA256 (OpenCSG-1.4.2.tar.gz) = d952ec5d3a2e46a30019c210963fcddff66813efc9c29603b72f9553adff4afb
+SIZE (OpenCSG-1.4.2.tar.gz) = 933135

graph/libopencsg/pkg-descr

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+OpenCSG is a library that does image-based CSG rendering using OpenGL.
+OpenCSG is written in C++ and supports most modern graphics hardware.
+
+CSG is short for Constructive Solid Geometry and denotes an approach
+to model complex 3D-shapes using simpler ones. I.e., two shapes can be
+combined by taking the union of them, by intersecting them, or by
+subtracting one shape of the other. The most basic shapes, which are
+not result of such a CSG operation, are called primitives. Primitives
+must be solid, i.e., they must have a clearly defined interior and
+exterior. By construction, a CSG shape is also solid then.
+
+Image-based CSG rendering (also z-buffer CSG rendering) is a term that
+denotes algorithms for rendering CSG shapes without an explicit
+calculation of the geometric boundary of a CSG shape. Such algorithms
+use frame-buffer settings of the graphics hardware, e.g., the depth
+and stencil buffer, to compose CSG shapes. OpenCSG implements a
+variety of those algorithms, namely the Goldfeather algorithm and the
+SCS algorithm, both of them in several variants.
+
+WWW: http://www.opencsg.org/

graph/libopencsg/pkg-plist

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+include/opencsg.h
+lib/libopencsg.so
+lib/libopencsg.so.1