開源項目推薦：CNC+CRC/SoftPLC/OpenCASCADE/CAD/CAM

尊重作者，支援原創，如需轉載，請附上原位址：

https://blog.csdn.net/libaineu2004/article/details/89053246

先來看看B站的視訊

https://www.bilibili.com/video/BV1Bt4y1y74P

CRC/CNC

Cutter Radius Compensation for Milling machines.

cutter radius compensation

cutter comp

https://github.com/shooter64738/CRC

https://github.com/grbl -- rs274/ngc parser,不支援G40/G41/G42

https://github.com/synthetos/g2

https://github.com/modmaker/BeBoPr

http://gerbv.geda-project.org/

https://github.com/eduard-x/cnc-qt

https://github.com/vlachoudis/bCNC

https://github.com/Smoothieware/Smoothieware ++ http://smoothieware.org/

https://github.com/OpenBuilds

https://github.com/winder/Universal-G-Code-Sender

https://github.com/arkypita/LaserGRBL

https://github.com/svenhb/GRBL-Plotter

https://github.com/cncjs/cncjs

LinuxCNC

http://www.linuxcnc.org/ -- Supports rigid tapping, cutter compensation, and many other advanced control features.

https://github.com/LinuxCNC/linuxcnc

https://github.com/LinuxCNC/linuxcnc/tree/master/src/emc

https://github.com/LinuxCNC/linuxcnc/blob/master/src/emc/rs274ngc/interp_convert.cc -- 刀具補償

https://github.com/LinuxCNC/simple-gcode-generators

http://linuxcnc.org/dists/lucid/emc2.4/ linuxcnc老版本名稱叫EMC2，Enhanced Machine Controller (EMC2)

Open CASCADE Technology（簡稱OCCT）

opengl是基礎圖形庫，open cascade是一個進階的CAD開發庫，OCC基礎就是OpenGL。

https://www.opencascade.com/ 官網

https://www.opencascade.com/content/download-center 下載下傳中心

https://www.opencascade.com/content/latest-release 最新版本下載下傳，隻提供x64版本的庫，不提供x86

https://www.opencascade.com/content/previous-releases 曆史版本下載下傳

https://www.opencascade.com/content/3rd-party-components 第三方依賴庫，其中Freetype和Tcl/Tk是必須的

https://dev.opencascade.org/ 開發者平台

https://dev.opencascade.org/doc/overview/html/index.html 開發文檔

https://dev.opencascade.org/doc/overview/html/occt_dev_guides__building.html 環境搭建

https://github.com/topics/opencascade github相關

重量級應用：

1、FreeCAD是一個基于OpenCASCADE的開源CAD/CAE工具。 OpenCASCADE是一套開源的CAD/CAM/CAE幾何模型核心，來自法國Matra Datavision公司，是著名的CAD軟體EUCLID的開發平台。

https://github.com/FreeCAD/FreeCAD

https://github.com/FreeCAD/FreeCAD/blob/master/src/Mod/Import/App/ImpExpDxf.cpp Dxf檔案解析

https://www.freecadweb.org/

https://www.freecadweb.org/wiki/CompileOnWindows 源碼編譯說明

https://github.com/FreeCAD/FreeCAD-ports-cache/releases 依賴庫官方釋出

https://github.com/apeltauer/FreeCAD/releases 依賴庫非官方純私人釋出，版本比較新

https://github.com/FreeCAD/FreeCAD_Conda 依賴庫新方式

2、heekscad

HeekCAD是一個免費，開源CAD應用程式，作者是Dan Heeks，[email protected]

https://www.opencascade.com/content/heekscad

https://github.com/Heeks/heekscad

https://github.com/Heeks/heekscad/blob/master/src/HDxf.cpp Dxf檔案解析

https://github.com/Heeks/heekscnc

https://github.com/danheeks/dxfconv dxf檔案讀寫

https://github.com/danheeks/HeeksCAM

https://github.com/danheeks/PyCAD

https://github.com/danheeks/PyCAM

https://code.google.com/archive/p/heekscad/downloads

https://code.google.com/archive/p/heekscnc/downloads

https://sites.google.com/site/heekscad/

3、PythonOCC

Python wrapper for Open CASCADE Technology.

http://www.pythonocc.org/

4、cadquery

CadQuery2.0是pythonocc的進階封裝庫，使用了Qt語言作為界面語言，是一款正在起步的指令行模組化軟體，由于pythonocc的使命在于封裝opencascade而非關注界面，那麼對于有界面需求的開發人員，便可以好好關注一下cadquery。

https://github.com/CadQuery/cadquery

5、OpenShapefactory

OpenShapefactory is a Qt-based Geometry Factory that provides a single-point of entry to the most of OCCT geometrical operations.It is a Middle-Man between you, OpenCascade and QT, it serves as a Geometry Factory wrapping OpenCascade, and providing a single-point of entry to the creation of most geometrical operations.

http://code.google.com/p/openshapefactory

6、declaracad

https://github.com/codelv/declaracad

7、mayo

https://github.com/fougue/mayo -- 3D viewer based on OpenCascade，Support of STEP/IGES assemblies (colors and tree structure)

https://github.com/cbernardo/libIGES -- IGES解析

編譯源碼之前，需要在mayo源工程的opencascade.pri檔案手動添加OpenCascade路徑：

# Declare pure QMake variables out of OCC envvars

COMMON_PATH = "D:/My Resources/OpenCASCADE-7.5.0-vc14-64/opencascade-7.5.0"#注意斜杆的方向;引号;
CASCADE_INC_DIR = $${COMMON_PATH}/inc
CASCADE_LIB_DIR = $${COMMON_PATH}/win64/vc14/lib
CASCADE_BIN_DIR = $${COMMON_PATH}/win64/vc14/bin
CASCADE_SRC_DIR = $${COMMON_PATH}/src

開源項目推薦：CNC+CRC/SoftPLC/OpenCASCADE/CAD/CAM

8、eryar

https://github.com/eryar/occQt Qt demo

http://www.cppblog.com/eryar/ OCCT精品部落格，[email protected]

https://www.cnblogs.com/opencascade/ 同上

x、其他相關的部落格和輕量級應用：

https://github.com/miho/OCC-CSG -- Simple but powerful CSG tool based on OpenCascade

https://github.com/lvk88/OccTutorial

https://github.com/tpaviot/oce OCE，在OCC基礎上擴充

https://github.com/tianxiao/occsamplemfc MFC demo

http://www.zyh1690.org/cadcg/ 部落格

https://blog.csdn.net/augusdi/article/category/695059 部落格

CAD

1、QCAD

https://www.qcad.org/en/

https://github.com/qcad/qcad

https://qcad.org/en/90-dxflib -- dxflib首頁，配套開源庫

https://github.com/mcneel/opennurbs -- 配套開源庫

https://www.ribbonsoft.com/doc/qcad/latest/developer/

https://www.ribbonsoft.com/doc/qcad/2.2/reference/zh_CN/

最早的版本v2.0.5：https://sourceforge.net/projects/qcadbin-win/

QCAD v2.2.2.1 最後一個v2.x系列的版本

QCAD v3.0.9.0 從v3.x開始使用ECMA Script interface

qcad的dxf讀取在\src\io\dxf\RDxfImporter.cpp
void RDxfImporter::endEntity()
{
    QSharedPointer<RSplineEntity> entity(new RSplineEntity(document, RSplineData(spline)));
    importEntity(entity);
}

qcad的樣條曲線的繪圖在/src/core/RPainterPath.cpp
void RPainterPath::addSpline(const RSpline& spline) {
    int degree = spline.getDegree();
    if (degree<=3) {
        moveTo(spline.getStartPoint());
    }

    QList<RSpline> list = spline.getBezierSegments();

    for (int i=0; i<list.count(); i++) {
        QList<RVector> cps = list[i].getControlPoints();
        // very rare splines of degree >= 4:
        if ((cps.size()>=5 && degree==cps.size()-1)) {
            QList<QSharedPointer<RShape> > segments = spline.getExploded(16);
            for (int k=0; k<segments.length(); k++) {
                QSharedPointer<RLine> l = segments[k].dynamicCast<RLine>();
                if (k==0) {
                    moveTo(l->getStartPoint());
                }
                lineTo(l->getEndPoint());
            }
        }
        else if (cps.size()==4 && degree==3) {
            cubicTo(cps[1], cps[2], cps[3]);
        }
        else if (cps.size()==3 && degree==2) {
            quadTo(cps[1], cps[2]);
        }
        else if (cps.size()==2 && degree==1) {
            lineTo(cps[1]);
        }
        else {
            qWarning() << "RPainterPath::addSpline: invalid bezier segment: " << list[i];
            continue;
        }
    }
}

//\src\core\RPainterPath.h
void quadTo(qreal ctrlPtx, qreal ctrlPty, qreal endPtx, qreal endPty) {
    QPainterPath::quadTo(ctrlPtx, ctrlPty, endPtx, endPty);
}

void cubicTo(qreal ctrlPt1x, qreal ctrlPt1y, qreal ctrlPt2x, qreal ctrlPt2y, qreal endPtx, qreal endPty) {
    QPainterPath::cubicTo(ctrlPt1x, ctrlPt1y, ctrlPt2x, ctrlPt2y, endPtx, endPty);
}

//QPainterPath源碼來自Qt官方\Qt\Qt5.12.7\5.12.7\Src\qtbase\src\gui\painting

//cubicTo和quadTo都是用來實作貝塞爾曲線的，那有什麼不一樣呢？
官方是這麼說的：
Same as cubicTo, but the coordinates are considered relative to the current point on this contour.
說白了，就是多了一個控制點而已。
//https://doc.qt.io/qt-5/qpainterpath.html
//https://qtdebug.com/qt-smooth-curve/

2、LibreCAD

LibreCAD 是一款開源免費的 2D CAD 制圖軟體，原名為 CADuntu 。它是基于社群版本 QCad 建構，并利用 Qt4 進行了重構，原生支援 Mac OSX, Windows 和 Linux 。它提供了基于 GPL 協定的讀取/修改/建立 CAD 檔案 (.dxf ) 方案。

LibreCAD最早源自QCad的老版本，v2.0.5，using mingw-5.1.4 and qt-3.3.x-p8.

https://librecad.org/

https://github.com/LibreCAD

https://sourceforge.net/projects/librecad/

LibreCAD v1.0.4 最後一個v1.x系列的版本

LibreCAD v2.0.0alpha2 開始使用c++ boost庫

3、KiCAD EDA

A Cross Platform and Open Source Electronics Design Automation Suite

https://www.kicad-pcb.org/

https://gitlab.com/kicad/code/kicad ++ https://www.wxwidgets.org/ 界面不是用Qt寫的，而是wxWidgets

https://github.com/KiCad/kicad-source-mirror

https://gitlab.com/kicad/code/kicad/-/tree/master/thirdparty/tinyspline_lib 改版的tinyspline，可以和QCAD的dxflib配套

https://github.com/msteinbeck/tinyspline 原版的tinyspline

https://gitlab.com/kicad/code/kicad/-/tree/master/thirdparty/dxflib_qcad 改版的dxflib

https://qcad.org/en/90-dxflib 原版的dxflib

請重點關注https://gitlab.com/kicad/code/kicad/-/blob/master/pcbnew/import_gfx/dxf_import_plugin.cpp，它用dxflib庫解析dxf檔案

\pcbnew\import_gfx\dxf_import_plugin.cpp
#include "tinyspline_lib/tinysplinecpp.h"

void DXF_IMPORT_PLUGIN::insertSpline( int aWidth )
{
    unsigned imax = m_curr_entity.m_SplineControlPointList.size();
    if( imax < 2 )  // malformed spline
        return;

    // Use bezier curves, supported by pcbnew, to approximate the spline
	tinyspline::BSpline dxfspline( m_curr_entity.m_SplineControlPointList.size(),
                                   /* coord dim */ 2, m_curr_entity.m_SplineDegree );
    std::vector<double> ctrlp;

    for( unsigned ii = 0; ii < imax; ++ii )
    {
        ctrlp.push_back( m_curr_entity.m_SplineControlPointList[ii].m_x );
        ctrlp.push_back( m_curr_entity.m_SplineControlPointList[ii].m_y );
    }

	dxfspline.setCtrlp( ctrlp );
	dxfspline.setKnots( m_curr_entity.m_SplineKnotsList );
	tinyspline::BSpline beziers( dxfspline.toBeziers() );

    std::vector<double> coords = beziers.ctrlp();

    // Each Bezier curve uses 4 vertices (a start point, 2 control points and a end point).
    // So we can have more than one Bezier curve ( there are one curve each four vertices)
    for( unsigned ii = 0; ii < coords.size(); ii += 8 )
    {
        VECTOR2D start( mapX( coords[ii] ), mapY( coords[ii+1] ) );
        VECTOR2D bezierControl1( mapX( coords[ii+2] ), mapY( coords[ii+3] ) );
        VECTOR2D bezierControl2( mapX( coords[ii+4] ), mapY( coords[ii+5] ) );
        VECTOR2D end( mapX( coords[ii+6] ), mapY( coords[ii+7] ) );
        m_internalImporter.AddSpline( start, bezierControl1, bezierControl2, end , aWidth );
    }
}

\pcbnew\import_gfx\graphics_importer_buffer.h
void ImportTo( GRAPHICS_IMPORTER& aImporter ) const override
{
    aImporter.AddSpline( m_start, m_bezierControl1, m_bezierControl2, m_end, m_width );
}

\pcbnew\import_gfx\graphics_importer_pcbnew.cpp
void GRAPHICS_IMPORTER_PCBNEW::AddSpline( const VECTOR2D& aStart, const VECTOR2D& BezierControl1,
                const VECTOR2D& BezierControl2, const VECTOR2D& aEnd, double aWidth )
{
    unique_ptr<DRAWSEGMENT> spline( createDrawing() );
    spline->SetShape( S_CURVE );
    spline->SetLayer( GetLayer() );
    spline->SetWidth( MapLineWidth( aWidth ) );
    spline->SetStart( MapCoordinate( aStart ) );
    spline->SetBezControl1( MapCoordinate( BezierControl1 ) );
    spline->SetBezControl2( MapCoordinate( BezierControl2 ) );
    spline->SetEnd( MapCoordinate( aEnd ) );
    spline->RebuildBezierToSegmentsPointsList( aWidth );

    if( spline->Type() == PCB_MODULE_EDGE_T )
        static_cast<EDGE_MODULE*>( spline.get() )->SetLocalCoord();

    addItem( std::move( spline ) );
}

\pcbnew\class_drawsegment.cpp
void DRAWSEGMENT::RebuildBezierToSegmentsPointsList( int aMinSegLen )
{
    // Has meaning only for S_CURVE DRAW_SEGMENT shape
    if( m_Shape != S_CURVE )
    {
        m_BezierPoints.clear();
        return;
    }
    // Rebuild the m_BezierPoints vertex list that approximate the Bezier curve
    std::vector<wxPoint> ctrlPoints = { m_Start, m_BezierC1, m_BezierC2, m_End };
    BEZIER_POLY converter( ctrlPoints );
    converter.GetPoly( m_BezierPoints, aMinSegLen );
}

\common\bezier_curves.cpp
void BEZIER_POLY::GetPoly( std::vector<wxPoint>& aOutput, int aMinSegLen )
{
}

4、BRL-CAD

BRL-CAD 是一個構造實體幾何(CSG) 實體模型計算機輔助設計(CAD) 系統。

https://sourceforge.net/projects/brlcad/

https://brlcad.org

5、openscad

https://github.com/openscad/openscad

http://www.openscad.org/ OpenSCAD是一個建立立體3D CAD物體的得力軟體

6、RapCAD

https://github.com/GilesBathgate/RapCAD

7、AnyCAD 國産軟體

http://www.anycad.net/

https://github.com/anycad

8、Vero WorkNC

CNC刀路設計軟體。WorkNC是vero worknc系列軟體的新版本，軟體具有多種自動刀具路徑類型，可以滿足使用者的各種需求，包括粗加工、精加工、優化加工、清根加工、外形輪廓加工、曲線加工及鑽孔等，可以實作全局粗加工刀具路徑通過允許微小刀柄近似來通路更難的區域。

9、Coin3D

https://bitbucket.org/Coin3D/coin/wiki/Home

10、某位大牛的作品

https://www.cnblogs.com/ucancad/

11、NaroCAD

NaroCAD is a fully fledged and extensible 3D parametric modeling CAD application. It is based on OpenCascade.

http://narocad.com/

https://github.com/mikowiec/rhiocad

12、JCAE

JAVA based environment for CAE applications.

http://jcae.sourceforge.net/

13、gCAD3D

http://www.gcad3d.org/

14、boardcad

http://www.boardcad.com/

15、solvespace

http://solvespace.com/index.pl

16、DraftSight 不開源

https://www.3ds.com/products-services/draftsight-cad-software/

17、CAD from a parallel universe

https://github.com/mkeeter/antimony

x、大全集合

https://github.com/mrkaban/Lpro/wiki/%D0%A1%D0%90%D0%9F%D0%A0

http://www.anderswallin.net/open-source-software/

https://sourceforge.net/directory/science-engineering/mechcivileng/caddcam/os:windows/ 可以搜尋到很多開源項目

CAM

CNC Master

https://sourceforge.net/projects/cncmaster/

Techne (R) CAD/CAM

https://sourceforge.net/projects/technecadcam/ 2.5D CAD CAM emphasis on CAM and toolpaths

https://camotics.org/ ++ https://github.com/CauldronDevelopmentLLC/CAMotics

https://github.com/aewallin

https://github.com/aewallin/openvoronoi OpenVoronoi for 2D toolpaths

https://github.com/aewallin/opencamlib OpenCAMLib for 3D toolpaths

http://www.anderswallin.net/CAM/ 文章

http://www.anderswallin.net/open-source-software/ 文章

https://github.com/OpenBuilds/OpenBuilds-CAM Online CNC CAM System,JavaScript

Monocam

DXF2GCODE

dxf2gcode is a tool for converting 2D (dxf, pdf, ps) drawings to CNC machine compatible GCode.

https://sourceforge.net/projects/dxf2gcode/ 與EMC2內建/G0通過路徑優化減少移動/通過Line and Arc's改進了樣條線導入的精度

https://github.com/pcb2gcode pcb2gcode最短路徑

https://sourceforge.net/projects/dxf2gcode/ dxf2gcode: converting 2D dxf drawings to CNC machine compatible G-Code

系統資料庫 HKEY_CURRENT_USER\Software\dxf2gcode

配置檔案 C:\Users\<使用者名>\.config\dxf2gcode

開源項目推薦：CNC+CRC/SoftPLC/OpenCASCADE/CAD/CAM

PyCharm python3.7+PyQt5.0學習開源代碼dxf2gcode

PCB Milling/CAM

嘉立創EDA

https://lceda.cn/

https://lceda.cn/editor

PCBMilling

https://wiki.base48.cz/PCBMilling

https://reprap.org/wiki/PCB_Milling

http://solvespace.com/index.pl CRC

https://github.com/solvespace/solvespace Solvespace is open source and claims to export tool paths as gcode with cutter radius compensation

https://github.com/malichao/GerberCAM

https://github.com/SmartMachines/OpenCAM -- Qt

FlatCAM

是免費和開源的 PCB CAM，采用 Python + PyQt編寫，在大多數平台上穩定運作。FlatCAM 是一種為在數控雕刻機上制造 pcb 的數控工作的程式。它将您的 PCB 工程項目生成的 Gerber 檔案，轉換成數控雕刻機通用的 G-Code 代碼。

http://flatcam.org/ -- 2D Computer-Aided PCB Manufacturing

https://bitbucket.org/jpcgt/flatcam

http://flatcam.org/manual/objectreference.html#paint-area 刀補算法使用的是shapely，它是計算幾何庫GEOS的Python包。

https://bitbucket.org/jpcgt/flatcam/src/master/ 穩定版源碼下載下傳

https://bitbucket.org/jpcgt/flatcam/src/Beta/ 最新版beta源碼下載下傳

https://bitbucket.org/jpcgt/flatcam/downloads/ 安裝程式下載下傳

開源項目推薦：CNC+CRC/SoftPLC/OpenCASCADE/CAD/CAM

Clipper計算機圖形庫，刀補

https://libaineu2004.blog.csdn.net/article/details/103525859

https://github.com/LibrePCB/LibrePCB

Candle 蠟燭

https://github.com/Denvi/Candle -- GRBL controller application with G-Code visualizer written in Qt

Candle的檔案解析GcodeParser.cpp來源自Will Winder編寫的“ Universal GcodeSender”開源項目。此檔案最初是從“ GcodeViewParse.java”類移植的。而Universal-G-Code-Sender又是基于grbl的java版本。

grbl：使用優化的C語言編寫的開源，嵌入式，高性能g代碼解析器和CNC銑削控制器，将在直接的Arduino上運作。

https://github.com/gnea/grbl

https://github.com/grbl/grbl/wiki

http://bengler.no/grbl

Universal-G-Code-Sender：A Java based GRBL compatible cross-platform G-Code sender.

https://github.com/winder/Universal-G-Code-Sender

https://github.com/winder/Universal-G-Code-Sender/tree/master/test_files 提供了測試用的*.nc檔案

https://github.com/synthetos/TinyG

https://github.com/synthetos/g2

http://smoothieware.org/ ++ https://github.com/Smoothieware/Smoothieware

開源項目推薦：CNC+CRC/SoftPLC/OpenCASCADE/CAD/CAM

Cura

https://github.com/Ultimaker/Cura -- 3D printer / slicing GUI built on top of the Uranium framework

https://github.com/Ultimaker/CuraEngine

開源項目推薦：CNC+CRC/SoftPLC/OpenCASCADE/CAD/CAM

開源的仿真軟體HOPSAN

Hopsan是一個免費的開源多域系統仿真工具，由林平大學流體與機電系統系開發。

https://github.com/Hopsan/hopsan

開源項目推薦：CNC+CRC/SoftPLC/OpenCASCADE/CAD/CAM

SoftPLC, IEC 61131-3

按照工業控制領域常用的IEC61131-3标準來看，工業控制領域程式語言被分為了兩大類五種語言，兩大類是指圖形化程式設計和代碼程式設計，圖形化程式設計中有Ladder（梯形圖），FBD（Function Block Diagram，功能塊圖）和SFC（Sequential Function Chart，序列功能表），而代碼程式設計有IL（Instruction List，指令集）和ST（Structured Text，結構化文本）。

幾個著名的開源項目：

PLCEdit：完全按照IEC61131标準開發，所有五種語言均支援，使用Python開發，故可以做到跨平台。
Beremiz：一套完整的開源PLC解決方案，不過放在這裡主要是因為它不但使用了上面說的PLCEdit，同時還對其進行了增強，使得其增加了重要的線上調試功能。推薦！！！
SoapBox Snap：使用C#+WPF開發的，僅支援梯形圖一種語言，不過卻已經支援了線上調試功能，含模拟器。
LDmicro: Ladder Logic for PIC and AVR http://cq.cx/ladder.pl && https://github.com/LDmicro/LDmicro
國人：https://blog.csdn.net/yunhaiC/article/details/74518176

開源項目推薦：CNC+CRC/SoftPLC/OpenCASCADE/CAD/CAM

官網連結：

http://www.plcedit.org/

https://beremiz.org/index.html.en

https://bitbucket.org/skvorl/beremiz/src/default/

https://sourceforge.net/p/beremiz/beremiz/ci/default/tree/

https://github.com/nucleron/beremiz

http://soapboxautomation.com/

https://www.openplcproject.com/plcopen-editor openplc

https://github.com/thiagoralves/OpenPLC-Ladder-Editor

https://github.com/thiagoralves/OpenPLC_v2

https://github.com/starsight/RobotStudio

https://github.com/starsight/iec-compiler

開源項目推薦：CNC+CRC/SoftPLC/OpenCASCADE/CAD/CAM

先來看看B站的視訊

CRC/CNC

LinuxCNC

Open CASCADE Technology（簡稱OCCT）

CAD

CAM

DXF2GCODE

PCB Milling/CAM

開源的仿真軟體HOPSAN

SoftPLC, IEC 61131-3

繼續閱讀

Unity3d繪制矢量圖(類似于CAD夾點編輯)

【轉】 mtk平台camera流程原理（轉+改）

原理分析-CAM模型可視化（可解釋）

pytorch 實作Grad-CAM和Grad-CAM++Grad-CAM.pytorch

UG的一般模組化過程

機械相關專業詞彙集錦

cad.net開發

CAD二次開發入門——Hello World以及畫一個圓

CAD1 搭建彙編語言環境 win10+dosbox+masm一、dosbox+masm二、編輯和調試程式參考

[OpenCascade問題] error LNK2019: 無法解析的外部符号

如何在 C# 中以程式設計方式将 IGS/IGES 檔案轉換為 PDF？

opencascade計算點到特征線的距離應該注意的問題

第五節 PDM與企業資訊內建

occ[opencascade] 資料結構TopoDS_Shape 轉 assimp 資料結構， assimp導出3D格式檔案

AutoCAD 打開CAD會提示許可檢出逾時

openlayers.js通過map周遊所有圖層中的feature