Add step2wrl-occ

See README.md

README.md

@@ -1,2 +1,17 @@
 # 3D-format-converter
+
 A colloction of 3D format converters, step->wrl, iges->obj/mtl, step->obj/mtl
+
+# description list
+
+## step2wrl-occ
+
+**[Originally by twlostow](https://github.com/twlostow/step2wrl)**
+
+A converter based on openCASCADE, which accepts `*.step` or `*.igs` and exports `*.wrl`.
+
+I created a CMakeList to compile the project with `windows`/`openCASCADE 6.3.1`.
+
+Problems TODO:
+1. If the step is exported from UG and **some** of the faces are colored, then the un-colored faced are not exported. However, if **all** faces are uncolored, the output is OK; This shall be a logical problem in the code because all entities are loaded according to the verbose information of `occ`.
+2. `*.igs` loading is unstable. There may be empty output.

step2wrl-occ/CMakeLists.txt

@@ -0,0 +1,55 @@
+cmake_minimum_required(VERSION 2.8.2)
+
+set(PROJ_NAME "step2wrl")
+
+# ==========================================
+# This cmake file is for building the project with occ 6.3.1
+# there is no stable cmake package
+# so, edit following lines to set correct paths
+set(OCC_MAIN_DIR "C:/OpenCASCADE6.3.0")
+set(OCC_INCLUDE "${OCC_MAIN_DIR}/ros/inc")
+set(OCC_LIB "${OCC_MAIN_DIR}/ros/win32/lib")
+# ==========================================
+
+# do not edit below unless you know what you are doing
+
+cmake_policy(SET CMP0048 NEW)
+project(${PROJ_NAME} VERSION 0.1.0 LANGUAGES CXX)
+
+# set compiling parameters
+include_directories(${OCC_INCLUDE})
+
+set(CMAKE_CXX_FLAGS "/DWNT /EHsc")
+
+set(SOURCE_FILES
+	s3d_model.cpp s3d_model.h
+	step_mesher.cpp step_mesher.h
+	vrml_writer.cpp)
+
+set(LIBS_TO_LINK
+	PTKernel TKAdvTools  TKBin  TKBinL  TKBinTObj
+	TKBinXCAF  TKBO  TKBool  TKBRep  TKCAF  TKCDF
+	TKernel  TKFeat  TKFillet  TKG2d  TKG3d  TKGeomAlgo
+	TKGeomBase  TKHLR  TKIGES  TKLCAF  TKMath  TKMesh
+	TKMeshVS  TKNIS  TKOffset  TKPCAF  TKPLCAF  TKPrim
+	TKPShape  TKShapeSchema  TKShHealing  TKStdLSchema
+	TKStdSchema  TKSTEP209  TKSTEP  TKSTEPAttr  TKSTEPBase
+	TKSTL  TKTObj  TKTopAlgo TKVRML  TKXCAF
+	TKXCAFSchema  TKXDEIGES  TKXDESTEP  TKXMesh  TKXml
+	TKXmlL  TKXmlTObj  TKXmlXCAF  TKXSBase  TKService
+	TKOpenGl  TKV3d)
+
+add_executable(${PROJ_NAME} ${SOURCE_FILES})
+
+foreach(targetLibrary ${LIBS_TO_LINK})
+	message(STATUS "Finding and linking ${targetLibrary} ...")
+
+	find_library(OCC_LIB_${targetLibrary} NAMES ${targetLibrary} PATHS ${OCC_LIB})
+
+	if(NOT OCC_LIB_${targetLibrary})
+		message(FATAL_ERROR "${targetLibrary} not found!")
+	endif()
+
+	target_link_libraries(${PROJ_NAME} ${OCC_LIB_${targetLibrary}})
+
+endforeach(targetLibrary)

step2wrl-occ/export-test/Makefile

@@ -0,0 +1,73 @@
+OCE_LIB_DIR=/usr/local/oce/lib
+
+
+OCE_LIBS=$(OCE_LIB_DIR)/libFWOSPlugin.so \
+$(OCE_LIB_DIR)/libPTKernel.so \
+$(OCE_LIB_DIR)/libTKAdvTools.so \
+$(OCE_LIB_DIR)/libTKBinL.so \
+$(OCE_LIB_DIR)/libTKBin.so \
+$(OCE_LIB_DIR)/libTKBinTObj.so \
+$(OCE_LIB_DIR)/libTKBinXCAF.so \
+$(OCE_LIB_DIR)/libTKBool.so \
+$(OCE_LIB_DIR)/libTKBO.so \
+$(OCE_LIB_DIR)/libTKBRep.so \
+$(OCE_LIB_DIR)/libTKCAF.so \
+$(OCE_LIB_DIR)/libTKCDF.so \
+$(OCE_LIB_DIR)/libTKernel.so \
+$(OCE_LIB_DIR)/libTKFeat.so \
+$(OCE_LIB_DIR)/libTKFillet.so \
+$(OCE_LIB_DIR)/libTKG2d.so \
+$(OCE_LIB_DIR)/libTKG3d.so \
+$(OCE_LIB_DIR)/libTKGeomAlgo.so \
+$(OCE_LIB_DIR)/libTKGeomBase.so \
+$(OCE_LIB_DIR)/libTKHLR.so \
+$(OCE_LIB_DIR)/libTKIGES.so \
+$(OCE_LIB_DIR)/libTKLCAF.so \
+$(OCE_LIB_DIR)/libTKMath.so \
+$(OCE_LIB_DIR)/libTKMesh.so \
+$(OCE_LIB_DIR)/libTKMeshVS.so \
+$(OCE_LIB_DIR)/libTKNIS.so \
+$(OCE_LIB_DIR)/libTKOffset.so \
+$(OCE_LIB_DIR)/libTKOpenGl.so \
+$(OCE_LIB_DIR)/libTKPCAF.so \
+$(OCE_LIB_DIR)/libTKPLCAF.so \
+$(OCE_LIB_DIR)/libTKPrim.so \
+$(OCE_LIB_DIR)/libTKPShape.so \
+$(OCE_LIB_DIR)/libTKService.so \
+$(OCE_LIB_DIR)/libTKShapeSchema.so \
+$(OCE_LIB_DIR)/libTKShHealing.so \
+$(OCE_LIB_DIR)/libTKStdLSchema.so \
+$(OCE_LIB_DIR)/libTKStdSchema.so \
+$(OCE_LIB_DIR)/libTKSTEP209.so \
+$(OCE_LIB_DIR)/libTKSTEPAttr.so \
+$(OCE_LIB_DIR)/libTKSTEPBase.so \
+$(OCE_LIB_DIR)/libTKSTEP.so \
+$(OCE_LIB_DIR)/libTKSTL.so \
+$(OCE_LIB_DIR)/libTKTObj.so \
+$(OCE_LIB_DIR)/libTKTopAlgo.so \
+$(OCE_LIB_DIR)/libTKV3d.so \
+$(OCE_LIB_DIR)/libTKVoxel.so \
+$(OCE_LIB_DIR)/libTKVRML.so \
+$(OCE_LIB_DIR)/libTKXCAFSchema.so \
+$(OCE_LIB_DIR)/libTKXCAF.so \
+$(OCE_LIB_DIR)/libTKXDEIGES.so \
+$(OCE_LIB_DIR)/libTKXDESTEP.so \
+$(OCE_LIB_DIR)/libTKXMesh.so \
+$(OCE_LIB_DIR)/libTKXmlL.so \
+$(OCE_LIB_DIR)/libTKXml.so \
+$(OCE_LIB_DIR)/libTKXmlTObj.so \
+$(OCE_LIB_DIR)/libTKXmlXCAF.so \
+$(OCE_LIB_DIR)/libTKXSBase.so
+
+
+
+OBJS = step-export-demo.o
+CXXFLAGS = -I/usr/local/oce/include/oce -DLIN -DLININTEL -DHAVE_CONFIG_H -DHAVE_IOSTREAM -DHAVE_FSTREAM -DHAVE_LIMITS_H -I. -g
+LDFLAGS =  -L/usr/local/oce/lib $(OCE_LIBS) $(OCE_LIBS) $(OCE_LIBS) $(OCE_LIBS) -g -lpthread -lX11 -lfreetype -ldl -lGL
+
+all:	$(OBJS)
+			g++ -o step-export-demo $(OBJS) $(LDFLAGS)
+
+clean:
+			rm -f step-export-demo $(OBJS)
+