outline 与 天空盒 同时使用 outline 显示不全 求解
本帖最后由 koxter 于 2019-1-29 17:24 编辑将例子 Examples osgvertexprogram 中的天空盒 与 OsgFx：：outline 同时使用
随着相机旋转 outline不显示 或 变的显示不全
求解
本帖最后由 koxter 于 2019-1-29 17:26 编辑
二楼是代码#include <osgViewer/Viewer>
#include <osg/Group>
#include <osg/Geode>
#include <osgGA/GUIEventHandler>
#include <osgFX/Outline>
#include <osg/ShapeDrawable>
#include <osg/Stencil>
#include <osg/CullFace>
#include <osg/PolygonMode>
#include <osg/LineWidth>
#include <osg/Material>
#include <osgFX/Outline>
#include <osgFX/BumpMapping>
#include <osg/Depth>
#include <osg/CullFace>
#include <osg/PolygonOffset>
#include <osg/PolygonMode>
#include <osg/Material>
#include <osgDB/ReadFile>
#include <osgGA/OrbitManipulator>
#include <osg/TexMat>
#include <osg/TexGen>
#include <osg/TexEnv>
#include <osg/TexEnvCombine>
#include <osg/TextureCubeMap>
osg::TextureCubeMap* readCubeMap()
{
osg::TextureCubeMap* cubemap = new osg::TextureCubeMap;
//#define CUBEMAP_FILENAME(face) "nvlobby_" #face ".png"
//#define CUBEMAP_FILENAME(face) "Cubemap_axis/" #face ".png"
#define CUBEMAP_FILENAME(face) "Cubemap_snow/" #face ".jpg"
osg::Image* imagePosX = osgDB::readImageFile(CUBEMAP_FILENAME(posx));
osg::Image* imageNegX = osgDB::readImageFile(CUBEMAP_FILENAME(negx));
osg::Image* imagePosY = osgDB::readImageFile(CUBEMAP_FILENAME(posy));
osg::Image* imageNegY = osgDB::readImageFile(CUBEMAP_FILENAME(negy));
osg::Image* imagePosZ = osgDB::readImageFile(CUBEMAP_FILENAME(posz));
osg::Image* imageNegZ = osgDB::readImageFile(CUBEMAP_FILENAME(negz));
if (imagePosX && imageNegX && imagePosY && imageNegY && imagePosZ && imageNegZ)
{
cubemap->setImage(osg::TextureCubeMap::POSITIVE_X, imagePosX);
cubemap->setImage(osg::TextureCubeMap::NEGATIVE_X, imageNegX);
cubemap->setImage(osg::TextureCubeMap::POSITIVE_Y, imagePosY);
cubemap->setImage(osg::TextureCubeMap::NEGATIVE_Y, imageNegY);
cubemap->setImage(osg::TextureCubeMap::POSITIVE_Z, imagePosZ);
cubemap->setImage(osg::TextureCubeMap::NEGATIVE_Z, imageNegZ);
cubemap->setWrap(osg::Texture::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
cubemap->setWrap(osg::Texture::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
cubemap->setWrap(osg::Texture::WRAP_R, osg::Texture::CLAMP_TO_EDGE);
cubemap->setFilter(osg::Texture::MIN_FILTER, osg::Texture::LINEAR_MIPMAP_LINEAR);
cubemap->setFilter(osg::Texture::MAG_FILTER, osg::Texture::LINEAR);
}
return cubemap;
}
// Update texture matrix for cubemaps
struct TexMatCallback : public osg::NodeCallback
{
public:
TexMatCallback(osg::TexMat& tm) :
_texMat(tm)
{
}
virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
{
osgUtil::CullVisitor* cv = dynamic_cast<osgUtil::CullVisitor*>(nv);
if (cv)
{
const osg::Matrix& MV = *(cv->getModelViewMatrix());
const osg::Matrix R = osg::Matrix::rotate(osg::DegreesToRadians(112.0f), 0.0f, 0.0f, 1.0f)*
osg::Matrix::rotate(osg::DegreesToRadians(90.0f), 1.0f, 0.0f, 0.0f);
osg::Quat q = MV.getRotate();
const osg::Matrix C = osg::Matrix::rotate(q.inverse());
_texMat.setMatrix(C*R);
}
traverse(node, nv);
}
osg::TexMat& _texMat;
};
class MoveEarthySkyWithEyePointTransform : public osg::Transform
{
public:
/** Get the transformation matrix which moves from local coords to world coords.*/
virtual bool computeLocalToWorldMatrix(osg::Matrix& matrix, osg::NodeVisitor* nv) const
{
osgUtil::CullVisitor* cv = dynamic_cast<osgUtil::CullVisitor*>(nv);
if (cv)
{
osg::Vec3 eyePointLocal = cv->getEyeLocal();
matrix.preMultTranslate(eyePointLocal);
}
return true;
}
/** Get the transformation matrix which moves from world coords to local coords.*/
virtual bool computeWorldToLocalMatrix(osg::Matrix& matrix, osg::NodeVisitor* nv) const
{
osgUtil::CullVisitor* cv = dynamic_cast<osgUtil::CullVisitor*>(nv);
if (cv)
{
osg::Vec3 eyePointLocal = cv->getEyeLocal();
matrix.postMultTranslate(-eyePointLocal);
}
return true;
}
};
osg::Node* createSkyBox()
{
osg::StateSet* stateset = new osg::StateSet();
osg::TexEnv* te = new osg::TexEnv;
te->setMode(osg::TexEnv::REPLACE);
stateset->setTextureAttributeAndModes(0, te, osg::StateAttribute::ON);
osg::TexGen *tg = new osg::TexGen;
tg->setMode(osg::TexGen::NORMAL_MAP);
stateset->setTextureAttributeAndModes(0, tg, osg::StateAttribute::ON);
osg::TexMat *tm = new osg::TexMat;
stateset->setTextureAttribute(0, tm);
osg::TextureCubeMap* skymap = readCubeMap();
stateset->setTextureAttributeAndModes(0, skymap, osg::StateAttribute::ON);
stateset->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
stateset->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
// clear the depth to the far plane.
osg::Depth* depth = new osg::Depth;
depth->setFunction(osg::Depth::ALWAYS);
depth->setRange(1.0, 1.0);
stateset->setAttributeAndModes(depth, osg::StateAttribute::ON);
stateset->setRenderBinDetails(-1, "RenderBin");
osg::Drawable* drawable = new osg::ShapeDrawable(new osg::Sphere(osg::Vec3(0.0f, 0.0f, 0.0f), 1));
osg::Geode* geode = new osg::Geode;
geode->setCullingActive(false);
geode->setStateSet(stateset);
geode->addDrawable(drawable);
osg::Transform* transform = new MoveEarthySkyWithEyePointTransform;
transform->setCullingActive(false);
transform->addChild(geode);
osg::ClearNode* clearNode = new osg::ClearNode;
//clearNode->setRequiresClear(false);
clearNode->setCullCallback(new TexMatCallback(*tm));
clearNode->addChild(transform);
return clearNode;
}
int main(int argc, char **argv)
{
// must have stencil buffer...
osg::DisplaySettings::instance()->setMinimumNumStencilBits(1);
// construct the viewer
osgViewer::Viewer viewer;
viewer.setUpViewInWindow(100, 100, 800, 600);
osg::ref_ptr<osg::Group> root = new osg::Group;
// read the scene from the list of file specified commandline args.
osg::ref_ptr<osg::Node> loadedModel = osgDB::readNodeFile("cow.osgt");
osgFX::Outline* pOutLine = new osgFX::Outline;
pOutLine->setName("OutLineEffect");
pOutLine->setColor(osg::Vec4(1.0, 0.0f, 0.0f, 1.0f));
pOutLine->setWidth(10.0f);
pOutLine->addChild(loadedModel);
root->addChild(pOutLine);
root->addChild(createSkyBox());
//////////////////////////////////////////////////////////////////////////
// construct the viewer
viewer.setSceneData(root.get());
// must clear stencil buffer...
unsigned int clearMask = viewer.getCamera()->getClearMask();
viewer.getCamera()->setClearMask(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
return viewer.run();
} 找到原因了， 是天空盒ClearNode节点的原因
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