剖切出图是实际工程的常用需求，BIMBase SDK的剖切接口简单易用，能快速实现不同的剖切需求。
#pragma once
class ToolCuting : public BIMBase::Core::BPPrimitiveTool
{
DefineSuper(BPPrimitiveTool);
public:
ToolCuting();
protected:
virtual ~ToolCuting();
virtual ::p3d::Utf8CP _getToolName() const { return "ToolCuttingDemo"; }
virtual void _onRestartTool() override;
virtual bool _onDataButton(BPBaseButtonEventCP) override;
virtual bool _onResetButton(BPBaseButtonEventCP) override;
virtual bool _onModelMotion(BPBaseButtonEventCP ev)override;
virtual void _onDynamicFrame(BPBaseButtonEventCP) override;
virtual void _onPostInstall() override;
private:
void __doCutting();
//vecplane代表剖切面，0是xy平面，1是yz平面，2是xz平面
void __createSectionBoxAndClipPlane(int vecPlane, GeRange3d range, GePlane3d& clipplane, GeTransform& sectionBox, GeTransform& transform);
void __postTreatment();
private:
int m_Num = -1;
BPModelPtr m_ptrModelNew;
};
代码9-9：剖切范例代码ToolCuttingDemo头文件
#include "pch.h"
#include "time.h"
#include "ToolCuttingDemo.h"
using namespace BIMBase;
using namespace BIMBase::FrameWork;
using namespace BIMBase::SolidCore;
ToolCuting::ToolCuting()
{
m_ptrModelNew = nullptr;
}
ToolCuting::~ToolCuting()
{
__postTreatment();
}
void ToolCuting::_onPostInstall()
{
__doCutting();
}
void ToolCuting::__doCutting()
{
BPProjectP pProject = BPApplication::getInstance().getProjectManager()->getMainProject();
if (pProject == nullptr)
return;
BPViewportP pViewport = BPViewManager::getInstance().getViewport(0);
if (pViewport == nullptr)
return;
BPModelP pModel = pViewport->getTargetModel();
if (pModel == nullptr)
return;
//获取当前model上所有的图素
BPEntityArray entityArray;
BPEntityUtil::getEntitiesOfModel(entityArray, *pProject, pModel->getModelId());
if (entityArray.getCount() == 0)
return;
//确定剖切范围
p3d::pvector<BPGraphicsPtr> pvecGraphics;
GeRange3d range = GeRange3d::createByNull();
for (int i = 0; i < entityArray.getCount(); i++)
{
GeRange3d range3dew = GeRange3d::createByNull();
BPEntityPtr ptrCurr = entityArray.getByIndex(i);
if (!ptrCurr || !ptrCurr.isValid())
continue;
PString sClassname;
ptrCurr->getClassName(sClassname);
GeTransform tran;
tran.setByIdentityMatrix();
BPGraphicsPtr ptrGraphic = BPEntityUtil::transformEntity(*ptrCurr, tran, false);
pvecGraphics.push_back(ptrGraphic);
ptrCurr->getRange(range3dew);
range.extendRange(range3dew);
}
BPSymbology symb = BPGraphics::getDefaultSymbology();
symb.style = 0;
symb.weight = 1;
symb.color = BPColorUtil::getEntityColor(RGB(255, 255, 255), *pProject, true);
BPSymbology symb2 = BPGraphics::getDefaultSymbology();
symb2.style = 2;
symb2.weight = 0;
symb2.color = BPColorUtil::getEntityColor(RGB(255, 255, 255), *pProject, true);
//剖切范围是所有对象的包围盒
GePlane3d clipPlane;
GeTransform sectionBox;
GeTransform tm;
__createSectionBoxAndClipPlane(0, range, clipPlane, sectionBox, tm);
BPHideLineEntity sectionElement(pvecGraphics, clipPlane, true);
sectionElement.resetSectionBoxOrPlane(&clipPlane, §ionBox);
p3d::pmap<size_t, BPClassifyHideLineData> pouqieResult = sectionElement.getClassifyHideLineResult();
p3d::pmap<size_t, BPClassifyHideLineData>::iterator it = pouqieResult.begin();
P3DStatus status;
p3d::Utf8String sModelName = "CuttingModel";
p3d::platform::P3DModelType modelType = p3d::platform::P3DModelType::enPhysical;
BIMBase::Core::ModelTreeItemInfo modelTreeItemInfo;
BPModelPtr ptrNewModel = pProject->createNewModel(status, sModelName, modelType, true, modelTreeItemInfo);
if (ptrNewModel.isNull())
return;
m_ptrModelNew = ptrNewModel;
for (auto info : pvecGraphics)
{
BPGraphicsPtr ptrGraphics = ptrNewModel->createPhysicalGraphics();
BPGraphicsPtr ptrGraphicsDash = ptrNewModel->createPhysicalGraphics();
for (; it != pouqieResult.end(); it++)
{
BPClassifyHideLineData _classifyCurveDatas = it->second;
if (_classifyCurveDatas.vctProjectCurve.size() == 0 && _classifyCurveDatas.vctSliceCurve.size() == 0)
continue;
for (auto info : _classifyCurveDatas.vctProjectCurve)
{
GeCurveArrayPtr ptrCurves = info.m_curve;
ptrCurves->setByTransform(tm);
if (info.m_isHidden)
ptrGraphicsDash->addGeCurveArray(*ptrCurves, symb2);
else
{
ptrGraphics->addGeCurveArray(*ptrCurves, symb);
}
}
for (auto info : _classifyCurveDatas.vctSliceCurve)
{
p3d::pvector<BPHideLineData> vetSection = info;
for (auto infos : vetSection)
{
GeCurveArrayPtr ptrCurves = infos.m_curve;
ptrCurves->setByTransform(tm);
if (infos.m_isHidden)
ptrGraphicsDash->addGeCurveArray(*ptrCurves, symb2);
else
{
ptrGraphics->addGeCurveArray(*ptrCurves, symb);
}
}
}
}
/*BPEntityId SLIDE = ptrGraphics->saveForDrawing();
BPEntityId DASH = ptrGraphicsDash->saveForDrawing();*/
BPEntityId SLIDE = ptrGraphics->save();
BPEntityId DASH = ptrGraphicsDash->save();
}
PModelId ModelId = ptrNewModel->getModelId();
//创建view
CFrameWnd* pView = BIMBase::FrameWork::BPUIFrameWorkUtil::createView();
if (pView == nullptr)
return;
//获取创建view的number
m_Num = BIMBase::FrameWork::BPUIFrameWorkUtil::getViewNumber(pView);
//创建的新model在view中显示
BPViewManager::getInstance().displayModelOnViewPort(ModelId, m_Num);
BPViewManager::setAllow3DManipulations(m_Num, BPViewManager::BPRotateAxisOption::enRotateNone);
}
void ToolCuting::_onRestartTool()
{
ToolCuting* newTool = new ToolCuting();
newTool->installTool();
}
bool ToolCuting::_onDataButton(BPBaseButtonEventCP ev)
{
return false;
}
bool ToolCuting::_onResetButton(BPBaseButtonEventCP ev)
{
__postTreatment();
m_Num = -1;
_exitTool();
return false;
}
bool ToolCuting::_onModelMotion(BPBaseButtonEventCP ev)
{
__super::_onModelMotion(ev);
if (!getDynamicsStarted())
_beginDynamics();
return false;
}
void ToolCuting::_onDynamicFrame(BPBaseButtonEventCP ev)
{
return;
}
void ToolCuting::__createSectionBoxAndClipPlane(int vecPlane, GeRange3d range, GePlane3d& clipplane, GeTransform& sectionBox, GeTransform& transform)
{
GeVec3d xydirZ = GeVec3d::create(0,0,0);
GeVec3d yzdirZ = GeVec3d::create(0, 0, 0);
GeVec3d xzdirZ = GeVec3d::create(0, 0, 0);
BIMBase::Data::BPPlacement placement;
if (0 == vecPlane)
{
//剖切范围是所有对象的包围盒
//XY平面作为剖切面，剖切平面的法向要与剖切盒子的z轴同向
GeVec3d dir = GeVec3d::createByStartEndNormalize(range.high, GePoint3d::create(range.high.x, range.high.y, range.low.z));
GePlane3d xyclipPlane;
xyclipPlane.setByOriginAndNormal(range.high, dir);
GeVec3d dirX = GeVec3d::createByStartEnd(range.high, GePoint3d::create(range.low.x, range.high.y, range.high.z));
GeVec3d dirY = GeVec3d::createByStartEnd(range.high, GePoint3d::create(range.high.x, range.low.y, range.high.z));
xydirZ = GeVec3d::createByStartEnd(range.high, GePoint3d::create(range.high.x, range.high.y, range.low.z));
GeTransform xysectionBox = GeTransform::createByOriginAndVectors(range.high, dirX, dirY, xydirZ);
xydirZ.negate();
placement.setPlacement(GePoint3d::create(0, 0, 0), xydirZ, 0);
clipplane = xyclipPlane;
sectionBox = xysectionBox;
}
else if (1 == vecPlane)
{
//yz平面作为剖切面,要遵守右手法则，当平面法向为正时，把yz平面的y作为构造剖切盒子的x，z作为构造剖切盒子的y，然后剖切盒子的z要和平面的法向同向
GeVec3d yzdirX = GeVec3d::create(GePoint3d::create(0, (range.high.y - range.low.y), 0));
GeVec3d yzdirY = GeVec3d::create(GePoint3d::create(0, 0, (range.high.z - range.low.z)));
GeVec3d yzdir = GeVec3d::createByStartEndNormalize(range.low, GePoint3d::create(range.high.x, range.low.y, range.low.z));
yzdirZ = GeVec3d::createByStartEnd(range.low, GePoint3d::create(range.high.x, range.low.y, range.low.z));
GePlane3d yzclipPlane;
yzclipPlane.setByOriginAndNormal(range.low, yzdir);
GeTransform yzsectionBox = GeTransform::createByOriginAndVectors(range.low, yzdirX, yzdirY, yzdirZ);
//将比如xz,yz这种平面去剖切，要把结果转到xy平面上（因为最终在model上显示的是xy平面的结果，下面做法是比如xz平面，可以理解为xy平面，要把xz平面
//的y作为xy平面的z）
yzdirZ.negate();
placement.setPlacement(GePoint3d::create(0, 0, 0), yzdirZ, 0);
clipplane = yzclipPlane;
sectionBox = yzsectionBox;
}
else
{
//xz平面作为剖切面,要遵守右手法则，当平面法向为正时，把xz平面的z作为构造剖切盒子的x，x作为构造剖切盒子的y，然后剖切盒子的z要和平面的法向同向
//当平面法向量为负时，把xz平面的x作为构造剖切盒子的x，z作为构造剖切盒子的y,这里以法向为正为例
GeVec3d xzdirX = GeVec3d::create(GePoint3d::create(0, 0, (range.high.z - range.low.z)));
GeVec3d xzdirY = GeVec3d::create(GePoint3d::create((range.high.x - range.low.x), 0, 0));
GeVec3d xzdir = GeVec3d::createByStartEndNormalize(range.low, GePoint3d::create(range.low.x, range.high.y, range.low.z));
xzdirZ = GeVec3d::createByStartEnd(range.low, GePoint3d::create(range.low.x, range.high.y, range.low.z));
GePlane3d xzclipPlane;
xzclipPlane.setByOriginAndNormal(range.low, xzdir);
GeTransform xzsectionBox = GeTransform::createByOriginAndVectors(range.low, xzdirX, xzdirY, xzdirZ);
xzdirZ.negate();
placement.setPlacement(GePoint3d::create(0, 0, 0), xzdirZ, 0);
clipplane = xzclipPlane;
sectionBox = xzsectionBox;
}
transform = placement.toTransform();
transform.setByInverse(transform);
}
void ToolCuting::__postTreatment()
{
//关闭新建的视图
CFrameWnd* pView = BIMBase::FrameWork::BPUIFrameWorkUtil::getView(m_Num);
if (pView != nullptr)
{
pView->SendMessage(WM_CLOSE); //post message
}
if (m_ptrModelNew.isValid())
m_ptrModelNew->emptyContent();
}
void registerCutDrawingTool()
{
ToolCuting* tool = new ToolCuting();
tool->installTool();
}
AutoDoRegisterFunctionsBegin
BPToolsManager::registerFun("cuttingDemo", ®isterCutDrawingTool);
AutoDoRegisterFunctionsEnd
代码9-10：剖切范例代码ToolCuttingDemo源文件
示例代码9-9与代码9-10为剖切范例代码。主要通过获取当前模型空间所有模型，以所有模型的range为剖切盒子，剖切盒子在Z方向的顶面为剖切面进行剖切。图9-4为以上代码的剖切效果图。
图9-4 剖切效果图
