Hi
When i run my project exe int vs2005,that's ok, But when i run outer
it's not
correct! I function is render a scale a graphics boudary_width and
graphics ..
osg::Group * createGraph(osg::Vec3Array* points,osg::Vec4Array*
graph_color,osg::Vec4Array* boudary_color,int boudary_width,std::string _name)
{
osg::Group* trans = new osg::Group;
osg::MatrixTransform* trans_scale = new osg::MatrixTransform;
osg::Geode * graph = new osg::Geode;
graph->setName(_name + "inter");
osg::Geode * graph_scale = new osg::Geode;
graph_scale->setName(_name + "outer");
//得到所有点的x,y轴的包围盒
float x_min=0,x_max=0,y_min=0,y_max=0;
x_min = x_max = points->operator [](0).x();
y_min = y_max = points->operator [](0).y();
for (int i=1;i<points->size();++i)
{
if ((points->operator [](i).x())<x_min)
x_min = points->operator [](i).x();
if ((points->operator [](i).x())>x_max)
x_max = points->operator [](i).x();
if ((points->operator [](i).y())<y_min)
y_min = points->operator [](i).y();
if ((points->operator [](i).y())>y_max)
y_max = points->operator [](i).y();
}
//中心点
double x_mid = (x_min+x_max)/2;
double y_mid = (y_min+y_max)/2;
//得到要伸缩的比例
double x_scale = 1+2*boudary_width/(x_max-x_min);
double y_scale = 1+2*boudary_width/(y_max-y_min);
//设置变换矩阵
osg::Matrix matrix_scale;
osg::Matrix matrix_trans;
osg::Matrix matrix_trans1;
matrix_scale.makeScale(osg::Vec3(x_scale,y_scale,1));
matrix_trans.makeTranslate(-x_mid,-y_mid,0);
matrix_trans1.makeTranslate(x_mid,y_mid,0);
//生成几何节点 osg::Geode* graph = new osg::Geode();
{
//生成新的几何节点
osg::Geometry* geometry = new osg::Geometry();
//geometry->setName("geometry" );
osg::Geometry* geometry_scale = new osg::Geometry();
//geometry_scale->setName("geometry_scale");
//设置节点的顶点
geometry->setVertexArray(points);
geometry_scale->setVertexArray(points);
// 设置几何面的颜色
geometry->setColorArray(graph_color);
geometry->setColorBinding(osg::Geometry::BIND_OVERALL);
geometry_scale->setColorArray(boudary_color);
geometry_scale->setColorBinding(osg::Geometry::BIND_OVERALL);
// 添加绘制的几何
geometry->addPrimitiveSet(new
osg::DrawArrays(osg::PrimitiveSet::POLYGON,0,points->size()));
geometry_scale->addPrimitiveSet(new
osg::DrawArrays(osg::PrimitiveSet::POLYGON,0,points->size()));
// Setup blending
geometry->getOrCreateStateSet()->setMode(GL_BLEND, osg::StateAttribute::ON);
osg::BlendFunc *fn = new osg::BlendFunc();
fn->setFunction(osg::BlendFunc::SRC_ALPHA,
osg::BlendFunc::ONE_MINUS_SRC_ALPHA);
geometry->getOrCreateStateSet()->setAttributeAndModes(fn,
osg::StateAttribute::ON);
geometry_scale->getOrCreateStateSet()->setAttributeAndModes(fn,
osg::StateAttribute::ON);
//设置透明属性 --透明开关打开
geometry->getOrCreateStateSet()->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
geometry_scale->getOrCreateStateSet()->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
//添加到节点
graph_scale->addDrawable(geometry_scale);
trans_scale->addChild(graph_scale);
osg::Matrix t = matrix_trans*matrix_scale*matrix_trans1;
trans_scale->setMatrix(t);
graph->addDrawable(geometry);
trans->addChild(graph);
trans->addChild(trans_scale);
}
return trans;
}
Best regards. YangXiao.
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