cad/csxcad: Change to vtk8 because the app using this library doesn't support vtk9

cad/csxcad/Makefile

@@ -2,6 +2,7 @@ PORTNAME=	csxcad
 DISTVERSIONPREFIX=	v
 DISTVERSION=	0.6.2-103
 DISTVERSIONSUFFIX=	-g3c4fb66
+PORTREVISION=	1
 CATEGORIES=	cad
 
 MAINTAINER=	yuri@FreeBSD.org
@@ -11,22 +12,26 @@ LICENSE=	GPLv3
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 BUILD_DEPENDS=	cgal>0:math/cgal
+# many dependencies below are induced by vtk8, but not vtk9
 LIB_DEPENDS=	libboost_system.so:devel/boost-libs \
 		libfparser-4.5.so:math/fparser \
 		libgmp.so:math/gmp \
 		libhdf5.so:science/hdf5 \
 		libmpfr.so:math/mpfr \
+		libpng16.so:graphics/png \
 		libsz.so:science/szip \
+		libtiff.so:graphics/tiff \
 		libtinyxml.so:textproc/tinyxml \
-		libvtkCommonMath-9.0.so:math/vtk9
+		libvtkCommonCore-8.2.so:math/vtk8 # some related packages don't support vtk9 yet, see https://github.com/thliebig/QCSXCAD/issues/6#issuecomment-901633240
 
-USES=		cmake pkgconfig
+USES=		cmake jpeg pkgconfig
 USE_LDCONFIG=	yes
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	thliebig
 GH_PROJECT=	${PORTNAME:tu}
 
-CMAKE_ARGS=	-DFPARSER_ROOT_DIR=${LOCALBASE}
+CMAKE_ARGS=	-DFPARSER_ROOT_DIR=${LOCALBASE} \
+		-DVTK_DIR=${LOCALBASE}/lib/vtk-8.2/cmake/vtk-8.2
 
 .include <bsd.port.mk>