|
|
楼主 |
发表于 2011-11-3 18:12:43
|
显示全部楼层
回复 5# beijihuohu
array 又要耽误你时间了，今天在QQ上我按照你的建议这么做了，在ACCEPT函数中访问了每一个顶点，可是还是不能够在void PickHandler::pick(osgViewer::View* view, const osgGA::GUIEventAdapter& ea)执行时看见对话框，因为只有在HANDLE函数中用屏幕坐标选取，这样选择的图元才是我需要的图元，从所有方面考虑，也只有继承DRAWABLE才能最大效率的利用内存，提高一次加载的图元数量，谢谢你了。
#include <osg/Geode>
#include <osg/TexGen>
#include <osg/Texture2D>
#include <osgDB/ReadFile>
#include <osgViewer/Viewer>
#include <iostream>
#include <osgGA/TerrainManipulator>
#include <osgGA/StateSetManipulator>
#include <osgGA/AnimationPathManipulator>
#include <osgGA/TrackballManipulator>
#include <osgGA/FlightManipulator>
#include <osgGA/DriveManipulator>
#include <osgGA/KeySwitchMatrixManipulator>
#include <osgGA/StateSetManipulator>
#include <osgGA/AnimationPathManipulator>
#include <osgGA/TerrainManipulator>
#include <osg/PrimitiveSet>
#include <osg/Point>
#include <osg/Material>
#include <osg/Geode>
#include <osg/BlendFunc>
#include <osg/Depth>
#include <osg/Projection>
#include <osg/MatrixTransform>
#include <osg/Camera>
#include <osg/io_utils>
#include <osg/ShapeDrawable>
#include <osgText/Text>
#include <sstream>
#include <string>
#include <Windows.h>
//#include "gdal_priv.h"
//#pragma comment(lib,"gdal.lib")
//#include "F:\\soft\\dev\\c++\\OpenSceneGraph-2.8.3\\Bin\\examples\\osgteapot\\DemReader.h"
// The classic OpenGL teapot... taken form glut-3.7/lib/glut/glut_teapot.c
/* Copyright (c) Mark J. Kilgard, 1994. */
/**
(c) Copyright 1993, Silicon Graphics, Inc.
ALL RIGHTS RESERVED
Permission to use, copy, modify, and distribute this software
for any purpose and without fee is hereby granted, provided
that the above copyright notice appear in all copies and that
both the copyright notice and this permission notice appear in
supporting documentation, and that the name of Silicon
Graphics, Inc. not be used in advertising or publicity
pertaining to distribution of the software without specific,
written prior permission.
THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU
"AS-IS" AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR
OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NO
EVENT SHALL SILICON GRAPHICS, INC. BE LIABLE TO YOU OR ANYONE
ELSE FOR ANY DIRECT, SPECIAL, INCIDENTAL, INDIRECT OR
CONSEQUENTIAL DAMAGES OF ANY KIND, OR ANY DAMAGES WHATSOEVER,
INCLUDING WITHOUT LIMITATION, LOSS OF PROFIT, LOSS OF USE,
SAVINGS OR REVENUE, OR THE CLAIMS OF THIRD PARTIES, WHETHER OR
NOT SILICON GRAPHICS, INC. HAS BEEN ADVISED OF THE POSSIBILITY
OF SUCH LOSS, HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
ARISING OUT OF OR IN CONNECTION WITH THE POSSESSION, USE OR
PERFORMANCE OF THIS SOFTWARE.
US Government Users Restricted Rights
Use, duplication, or disclosure by the Government is subject to
restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
(c)(1)(ii) of the Rights in Technical Data and Computer
Software clause at DFARS 252.227-7013 and/or in similar or
successor clauses in the FAR or the DOD or NASA FAR
Supplement. Unpublished-- rights reserved under the copyright
laws of the United States. Contractor/manufacturer is Silicon
Graphics, Inc., 2011 N. Shoreline Blvd., Mountain View, CA
94039-7311.
OpenGL(TM) is a trademark of Silicon Graphics, Inc.
*/
/* Rim, body, lid, and bottom data must be reflected in x and
y; handle and spout data across the y axis only. */
static int patchdata[][16] =
{
/* rim */
{102, 103, 104, 105, 4, 5, 6, 7, 8, 9, 10, 11,
12, 13, 14, 15},
/* body */
{12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,
24, 25, 26, 27},
{24, 25, 26, 27, 29, 30, 31, 32, 33, 34, 35, 36,
37, 38, 39, 40},
/* lid */
{96, 96, 96, 96, 97, 98, 99, 100, 101, 101, 101,
101, 0, 1, 2, 3,},
{0, 1, 2, 3, 106, 107, 108, 109, 110, 111, 112,
113, 114, 115, 116, 117},
/* bottom */
{118, 118, 118, 118, 124, 122, 119, 121, 123, 126,
125, 120, 40, 39, 38, 37},
/* handle */
{41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52,
53, 54, 55, 56},
{53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64,
28, 65, 66, 67},
/* spout */
{68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
80, 81, 82, 83},
{80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91,
92, 93, 94, 95}
};
/* *INDENT-OFF* */
static float cpdata[][3] =
{
{0.2, 0, 2.7}, {0.2, -0.112, 2.7}, {0.112, -0.2, 2.7}, {0,
-0.2, 2.7}, {1.3375, 0, 2.53125}, {1.3375, -0.749, 2.53125},
{0.749, -1.3375, 2.53125}, {0, -1.3375, 2.53125}, {1.4375,
0, 2.53125}, {1.4375, -0.805, 2.53125}, {0.805, -1.4375,
2.53125}, {0, -1.4375, 2.53125}, {1.5, 0, 2.4}, {1.5, -0.84,
2.4}, {0.84, -1.5, 2.4}, {0, -1.5, 2.4}, {1.75, 0, 1.875},
{1.75, -0.98, 1.875}, {0.98, -1.75, 1.875}, {0, -1.75,
1.875}, {2, 0, 1.35}, {2, -1.12, 1.35}, {1.12, -2, 1.35},
{0, -2, 1.35}, {2, 0, 0.9}, {2, -1.12, 0.9}, {1.12, -2,
0.9}, {0, -2, 0.9}, {-2, 0, 0.9}, {2, 0, 0.45}, {2, -1.12,
0.45}, {1.12, -2, 0.45}, {0, -2, 0.45}, {1.5, 0, 0.225},
{1.5, -0.84, 0.225}, {0.84, -1.5, 0.225}, {0, -1.5, 0.225},
{1.5, 0, 0.15}, {1.5, -0.84, 0.15}, {0.84, -1.5, 0.15}, {0,
-1.5, 0.15}, {-1.6, 0, 2.025}, {-1.6, -0.3, 2.025}, {-1.5,
-0.3, 2.25}, {-1.5, 0, 2.25}, {-2.3, 0, 2.025}, {-2.3, -0.3,
2.025}, {-2.5, -0.3, 2.25}, {-2.5, 0, 2.25}, {-2.7, 0,
2.025}, {-2.7, -0.3, 2.025}, {-3, -0.3, 2.25}, {-3, 0,
2.25}, {-2.7, 0, 1.8}, {-2.7, -0.3, 1.8}, {-3, -0.3, 1.8},
{-3, 0, 1.8}, {-2.7, 0, 1.575}, {-2.7, -0.3, 1.575}, {-3,
-0.3, 1.35}, {-3, 0, 1.35}, {-2.5, 0, 1.125}, {-2.5, -0.3,
1.125}, {-2.65, -0.3, 0.9375}, {-2.65, 0, 0.9375}, {-2,
-0.3, 0.9}, {-1.9, -0.3, 0.6}, {-1.9, 0, 0.6}, {1.7, 0,
1.425}, {1.7, -0.66, 1.425}, {1.7, -0.66, 0.6}, {1.7, 0,
0.6}, {2.6, 0, 1.425}, {2.6, -0.66, 1.425}, {3.1, -0.66,
0.825}, {3.1, 0, 0.825}, {2.3, 0, 2.1}, {2.3, -0.25, 2.1},
{2.4, -0.25, 2.025}, {2.4, 0, 2.025}, {2.7, 0, 2.4}, {2.7,
-0.25, 2.4}, {3.3, -0.25, 2.4}, {3.3, 0, 2.4}, {2.8, 0,
2.475}, {2.8, -0.25, 2.475}, {3.525, -0.25, 2.49375},
{3.525, 0, 2.49375}, {2.9, 0, 2.475}, {2.9, -0.15, 2.475},
{3.45, -0.15, 2.5125}, {3.45, 0, 2.5125}, {2.8, 0, 2.4},
{2.8, -0.15, 2.4}, {3.2, -0.15, 2.4}, {3.2, 0, 2.4}, {0, 0,
3.15}, {0.8, 0, 3.15}, {0.8, -0.45, 3.15}, {0.45, -0.8,
3.15}, {0, -0.8, 3.15}, {0, 0, 2.85}, {1.4, 0, 2.4}, {1.4,
-0.784, 2.4}, {0.784, -1.4, 2.4}, {0, -1.4, 2.4}, {0.4, 0,
2.55}, {0.4, -0.224, 2.55}, {0.224, -0.4, 2.55}, {0, -0.4,
2.55}, {1.3, 0, 2.55}, {1.3, -0.728, 2.55}, {0.728, -1.3,
2.55}, {0, -1.3, 2.55}, {1.3, 0, 2.4}, {1.3, -0.728, 2.4},
{0.728, -1.3, 2.4}, {0, -1.3, 2.4}, {0, 0, 0}, {1.425,
-0.798, 0}, {1.5, 0, 0.075}, {1.425, 0, 0}, {0.798, -1.425,
0}, {0, -1.5, 0.075}, {0, -1.425, 0}, {1.5, -0.84, 0.075},
{0.84, -1.5, 0.075}
};
static float tex[2][2][2] =
{
{ {0, 0},
{1, 0}},
{ {0, 1},
{1, 1}}
};
// class to handle events with a pick
class PickHandler : public osgGA::GUIEventHandler {
public:
PickHandler(osgText::Text* updateText):
_updateText(updateText) {}
~PickHandler() {}
bool handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter& aa);
virtual void pick(osgViewer::View* view, const osgGA::GUIEventAdapter& ea);
void setLabel(const std::string& name)
{
if (_updateText.get()) _updateText->setText(name);
}
protected:
osg::ref_ptr<osgText::Text> _updateText;
};
bool PickHandler::handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter& aa)
{
switch(ea.getEventType())
{
case(osgGA::GUIEventAdapter: USH):
{
osgViewer::View* view = dynamic_cast<osgViewer::View*>(&aa);
if (view) pick(view,ea);
return false;
}
case(osgGA::GUIEventAdapter::KEYDOWN):
{
if (ea.getKey()=='c')
{
osgViewer::View* view = dynamic_cast<osgViewer::View*>(&aa);
osg::ref_ptr<osgGA::GUIEventAdapter> event = new osgGA::GUIEventAdapter(ea);
event->setX((ea.getXmin()+ea.getXmax())*0.5);
event->setY((ea.getYmin()+ea.getYmax())*0.5);
if (view) pick(view,*event);
}
return false;
}
default:
return false;
}
}
void PickHandler::pick(osgViewer::View* view, const osgGA::GUIEventAdapter& ea)
{
osgUtil: ineSegmentIntersector::Intersections intersections;
std::string gdlist="";
float x = ea.getX();
float y = ea.getY();
#if 0
osg::ref_ptr< osgUtil::LineSegmentIntersector > picker = new osgUtil::LineSegmentIntersector(osgUtil::Intersector::WINDOW, x, y);
osgUtil::IntersectionVisitor iv(picker.get());
view->getCamera()->accept(iv);
if (picker->containsIntersections())
{
intersections = picker->getIntersections();
#else
if (view->computeIntersections(x,y,intersections))
{
#endif
for(osgUtil::LineSegmentIntersector::Intersections::iterator hitr = intersections.begin();
hitr != intersections.end();
++hitr)
{
std: stringstream os;
if (!hitr->nodePath.empty() && !(hitr->nodePath.back()->getName().empty()))
{
// the geodes are identified by name.
//os<<"Object \""<<hitr->nodePath.back()->getName()<<"\""<<std::endl;
MessageBox(NULL,LPCTSTR(hitr->nodePath.back()->getName().c_str()),LPCTSTR(hitr->nodePath.back()->getName().c_str()),MB_OK);
}
else if (hitr->drawable.valid())
{
//os<<"Object \""<<hitr->drawable->className()<<"\""<<std::endl;
MessageBox(NULL,LPCTSTR(hitr->drawable->className()),LPCTSTR(hitr->drawable->className()),MB_OK);
}
//os<<" local coords vertex("<< hitr->getLocalIntersectPoint()<<")"<<" normal("<<hitr->getLocalIntersectNormal()<<")"<<std::endl;
//os<<" world coords vertex("<< hitr->getWorldIntersectPoint()<<")"<<" normal("<<hitr->getWorldIntersectNormal()<<")"<<std::endl;
const osgUtil::LineSegmentIntersector::Intersection::IndexList& vil = hitr->indexList;
for(unsigned int i=0;i<vil.size();++i)
{
//os<<" vertex indices ["<<i<<"] = "<<vil<<std::endl;
}
gdlist += os.str();
}
}
//setLabel(gdlist);
}
/* *INDENT-ON* */
static void
teapot(GLint grid, GLenum type)
{
float p[4][4][3], q[4][4][3], r[4][4][3], s[4][4][3];
long i, j, k, l;
glPushAttrib(GL_ENABLE_BIT | GL_EVAL_BIT);
glEnable(GL_AUTO_NORMAL);
glEnable(GL_NORMALIZE);
glEnable(GL_MAP2_VERTEX_3);
glEnable(GL_MAP2_TEXTURE_COORD_2);
for (i = 0; i < 10; i++) {
for (j = 0; j < 4; j++) {
for (k = 0; k < 4; k++) {
for (l = 0; l < 3; l++) {
p[j][k][l] = cpdata[patchdata[j * 4 + k]][l];
q[j][k][l] = cpdata[patchdata[j * 4 + (3 - k)]][l];
if (l == 1)
q[j][k][l] *= -1.0;
if (i < 6) {
r[j][k][l] =
cpdata[patchdata[j * 4 + (3 - k)]][l];
if (l == 0)
r[j][k][l] *= -1.0;
s[j][k][l] = cpdata[patchdata[j * 4 + k]][l];
if (l == 0)
s[j][k][l] *= -1.0;
if (l == 1)
s[j][k][l] *= -1.0;
}
}
}
}
glMap2f(GL_MAP2_TEXTURE_COORD_2, 0, 1, 2, 2, 0, 1, 4, 2,
&tex[0][0][0]);
glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4,
&p[0][0][0]);
glMapGrid2f(grid, 0.0, 1.0, grid, 0.0, 1.0);
glEvalMesh2(type, 0, grid, 0, grid);
glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4,
&q[0][0][0]);
glEvalMesh2(type, 0, grid, 0, grid);
if (i < 6) {
glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4,
&r[0][0][0]);
glEvalMesh2(type, 0, grid, 0, grid);
glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4,
&s[0][0][0]);
glEvalMesh2(type, 0, grid, 0, grid);
}
}
glPopAttrib();
}
// Now the OSG wrapper for the above OpenGL code, the most complicated bit is computing
// the bounding box for the above example, normally you'll find this the easy bit.
class Teapot : public osg: rawable
{
public:
Teapot() {setName("teapot");}
/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
Teapot(const Teapot& teapot,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY):
osg::Drawable(teapot,copyop) {}
META_Object(myTeapotApp,Teapot)
// the draw immediate mode method is where the OSG wraps up the drawing of
// of OpenGL primitives.
virtual void drawImplementation(osg::RenderInfo&) const
{
// teapot(..) doens't use vertex arrays at all so we don't need to toggle their state
// if we did we'd need to something like following call
// state.disableAllVertexArrays(), see src/osg/Geometry.cpp for the low down.
// just call the OpenGL code.
teapot(14,GL_FILL);
}
virtual void accept(osg::PrimitiveFunctor& func) const
{
MessageBox(NULL,"TEAPOT","TEAPOT",MB_OK);
}
// we need to set up the bounding box of the data too, so that the scene graph knows where this
// objects is, for both positioning the camera at start up, and most importantly for culling.
virtual osg::BoundingBox computeBound() const
{
osg::BoundingBox bbox;
// follow is some truely horrible code required to calculate the
// bounding box of the teapot. Have used the original code above to do
// help compute it.
float p[4][4][3], q[4][4][3], r[4][4][3], s[4][4][3];
long i, j, k, l;
for (i = 0; i < 10; i++) {
for (j = 0; j < 4; j++) {
for (k = 0; k < 4; k++) {
for (l = 0; l < 3; l++) {
p[j][k][l] = cpdata[patchdata[j * 4 + k]][l];
q[j][k][l] = cpdata[patchdata[j * 4 + (3 - k)]][l];
if (l == 1)
q[j][k][l] *= -1.0;
if (i < 6) {
r[j][k][l] =
cpdata[patchdata[j * 4 + (3 - k)]][l];
if (l == 0)
r[j][k][l] *= -1.0;
s[j][k][l] = cpdata[patchdata[j * 4 + k]][l];
if (l == 0)
s[j][k][l] *= -1.0;
if (l == 1)
s[j][k][l] *= -1.0;
}
}
bbox.expandBy(osg::Vec3(p[j][k][0],p[j][k][1],p[j][k][2]));
bbox.expandBy(osg::Vec3(q[j][k][0],q[j][k][1],q[j][k][2]));
if (i < 6)
{
bbox.expandBy(osg::Vec3(r[j][k][0],r[j][k][1],r[j][k][2]));
bbox.expandBy(osg::Vec3(s[j][k][0],s[j][k][1],s[j][k][2]));
}
}
}
}
return bbox;
}
protected:
virtual ~Teapot() {}
};
class Tea : public osg::Drawable
{
private:
osg::Vec3f m_first;
osg::Vec3f m_second;
public:
Tea()
{
setName("tea");
m_first.set(-5,-5,-5);
m_second.set(5,5,5);
}
/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
Tea(const Tea& teapot,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY):
osg::Drawable(teapot,copyop) {}
META_Object(myTeapotApp,Tea)
// the draw immediate mode method is where the OSG wraps up the drawing of
// of OpenGL primitives.
virtual void drawImplementation(osg::RenderInfo&) const
{
// teapot(..) doens't use vertex arrays at all so we don't need to toggle their state
// if we did we'd need to something like following call
// state.disableAllVertexArrays(), see src/osg/Geometry.cpp for the low down.
// just call the OpenGL code.
glColor3f(1,0,0);
glPointSize(20);
glBegin(GL_LINES);
glVertex3f(m_first.x(),m_first.y(),m_first.z());
glVertex3f(m_second.x(),m_second.y(),m_second.z());
glEnd();
}
virtual void accept(osg::PrimitiveFunctor& func) const
{
func.begin(GL_LINES);
func.vertex(m_first.x(),m_first.y(),m_first.z(),1);
func.vertex(m_second.x(),m_second.y(),m_second.z(),1);
func.end();
}
// we need to set up the bounding box of the data too, so that the scene graph knows where this
// objects is, for both positioning the camera at start up, and most importantly for culling.
virtual osg::BoundingBox computeBound() const
{
osg::BoundingBox bbox;
// follow is some truely horrible code required to calculate the
// bounding box of the teapot. Have used the original code above to do
// help compute it.
bbox.set(-5,-5,-5,5,5,5);
return bbox;
}
protected:
virtual ~Tea() {}
};
osg::Geode* createTeapot()
{
osg::Geode* geode = new osg::Geode();
// add the teapot to the geode.
//geode->addDrawable( new Teapot );
geode->addDrawable( new Tea);
// add a reflection map to the teapot.
osg::Image* image = osgDB::readImageFile("Images/reflect.rgb");
if (image)
{
osg::Texture2D* texture = new osg::Texture2D;
texture->setImage(image);
osg::TexGen* texgen = new osg::TexGen;
texgen->setMode(osg::TexGen::SPHERE_MAP);
osg::StateSet* stateset = new osg::StateSet;
stateset->setTextureAttributeAndModes(0,texture,osg::StateAttribute::ON);
stateset->setTextureAttributeAndModes(0,texgen,osg::StateAttribute::ON);
osg::Point* pt=new osg::Point;
pt->setSize(20);
stateset->setAttribute(pt,osg::StateAttribute::ON);
geode->setStateSet(stateset);
}
return geode;
}
int main(int , char **)
{
#if 1
// create viewer on heap as a test, this looks to be causing problems
// on init on some platforms, and seg fault on exit when multi-threading on linux.
// Normal stack based version below works fine though...
// construct the viewer.
osg::ref_ptr<osgViewer::Viewer> viewer = new osgViewer::Viewer;
// add model to viewer.
osg::Group *group=new osg::Group();
group->addChild(createTeapot());
//osg::Node *node=osgDB::readNodeFile("F:\\soft\\dev\\DELPHI\\CADCom5.25_E7_A0_B4_E8_A7_A3_E7_89%88\\CADCom\\Delphi\\Demos\\TextChange+Color2LineWeight\\Drawing1.dxf");
//group->addChild(node);
//group->addChild(CreateDem());
//CDemReader reader;
//osg::Geometry *geo;
//geo=reader.ReadDem("F:\\soft\\dev\\code\\c++\\658788840ZhangChao\\ZhangChao\\terrain\\085008.dem");
//viewer->setSceneData( createTeapot() );
//osg::Geode *newnode=new osg::Geode;
//newnode->addDrawable(geo);
//group->addChild(newnode);
osg::Geode* teapot=createTeapot();
teapot->setName("teapot");
group->addChild(teapot);
osg::ref_ptr<osgText::Text> updateText = new osgText::Text;
updateText->setCharacterSize(20.0f);
updateText->setFont("");
updateText->setColor(osg::Vec4(1.0f,1.0f,0.0f,1.0f));
updateText->setText("F:\\soft\\dev\\c++\\OpenSceneGraph-Data-2.8.0\\OpenSceneGraph-Data-2.8.0\\fonts//times.ttf");
updateText->setPosition(osg::Vec3(0,0,0));
updateText->setDataVariance(osg::Object::DYNAMIC);
printf("settxt");
viewer->addEventHandler(new PickHandler(updateText.get()));
printf("setok");
viewer->setSceneData(group);
return viewer->run();
#else
// construct the viewer.
osgViewer::Viewer viewer;
// add model to viewer.
viewer.setSceneData( createTeapot() );
// create the windows and run the threads.
return viewer.run();
#endif
} |
|
IP卡
狗仔卡
发表于 2011-10-10 14:00:03
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
显身卡
发表于 2011-10-10 14:49:30
