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76 lines
2 KiB
C++
76 lines
2 KiB
C++
#include "util.hpp"
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#include <osg/Node>
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namespace SceneUtil
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{
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void transformBoundingSphere (const osg::Matrixf& matrix, osg::BoundingSphere& bsphere)
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{
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osg::BoundingSphere::vec_type xdash = bsphere._center;
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xdash.x() += bsphere._radius;
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xdash = xdash*matrix;
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osg::BoundingSphere::vec_type ydash = bsphere._center;
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ydash.y() += bsphere._radius;
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ydash = ydash*matrix;
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osg::BoundingSphere::vec_type zdash = bsphere._center;
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zdash.z() += bsphere._radius;
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zdash = zdash*matrix;
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bsphere._center = bsphere._center*matrix;
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xdash -= bsphere._center;
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osg::BoundingSphere::value_type sqrlen_xdash = xdash.length2();
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ydash -= bsphere._center;
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osg::BoundingSphere::value_type sqrlen_ydash = ydash.length2();
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zdash -= bsphere._center;
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osg::BoundingSphere::value_type sqrlen_zdash = zdash.length2();
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bsphere._radius = sqrlen_xdash;
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if (bsphere._radius<sqrlen_ydash) bsphere._radius = sqrlen_ydash;
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if (bsphere._radius<sqrlen_zdash) bsphere._radius = sqrlen_zdash;
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bsphere._radius = sqrtf(bsphere._radius);
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}
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osg::Vec4f colourFromRGB(unsigned int clr)
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{
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osg::Vec4f colour(((clr >> 0) & 0xFF) / 255.0f,
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((clr >> 8) & 0xFF) / 255.0f,
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((clr >> 16) & 0xFF) / 255.0f, 1.f);
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return colour;
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}
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osg::Vec4f colourFromRGBA(unsigned int value)
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{
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return osg::Vec4f(makeOsgColorComponent(value, 0), makeOsgColorComponent(value, 8),
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makeOsgColorComponent(value, 16), makeOsgColorComponent(value, 24));
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}
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float makeOsgColorComponent(unsigned int value, unsigned int shift)
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{
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return float((value >> shift) & 0xFFu) / 255.0f;
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}
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bool hasUserDescription(const osg::Node* node, const std::string pattern)
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{
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if (node == nullptr)
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return false;
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const osg::UserDataContainer* udc = node->getUserDataContainer();
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if (udc && udc->getNumDescriptions() > 0)
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{
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for (auto& descr : udc->getDescriptions())
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{
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if (descr == pattern)
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return true;
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}
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}
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return false;
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}
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}
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