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53 lines
1.5 KiB
C++
53 lines
1.5 KiB
C++
#include "util.hpp"
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namespace SceneUtil
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{
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void transformBoundingSphere (const osg::Matrix& 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 len_xdash = xdash.length();
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ydash -= bsphere._center;
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osg::BoundingSphere::value_type len_ydash = ydash.length();
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zdash -= bsphere._center;
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osg::BoundingSphere::value_type len_zdash = zdash.length();
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bsphere._radius = len_xdash;
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if (bsphere._radius<len_ydash) bsphere._radius = len_ydash;
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if (bsphere._radius<len_zdash) bsphere._radius = len_zdash;
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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 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,
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((clr >> 24) & 0xFF) / 255.0f);
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return colour;
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}
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}
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