本文整理汇总了C++中osg::Vec3::length方法的典型用法代码示例。如果您正苦于以下问题：C++ Vec3::length方法的具体用法？C++ Vec3::length怎么用？C++ Vec3::length使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类osg::Vec3的用法示例。
在下文中一共展示了Vec3::length方法的10个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: getAngleBetween
double Frustum::getAngleBetween(const osg::Vec3 &a, const osg::Vec3 &b) {
float dot = a * b;
float mag = a.length() * b.length();
double angle = acos(dot/mag);
if (osg::isNaN(angle))
return 0;
else
return angle;
}示例2: operator
float ConeSector::operator() (const osg::Vec3& eyeLocal) const
{
float dotproduct = eyeLocal*_axis;
float length = eyeLocal.length();
if (dotproduct>_cosAngle*length) return 1.0f; // fully in sector
if (dotproduct<_cosAngleFade*length) return 0.0f; // out of sector
return (dotproduct-_cosAngleFade*length)/((_cosAngle-_cosAngleFade)*length);
}示例3:
osg::Vec3 ShadowTechnique::computeOrthogonalVector(const osg::Vec3& direction) const
{
float length = direction.length();
osg::Vec3 orthogonalVector = direction ^ osg::Vec3(0.0f, 1.0f, 0.0f);
if (orthogonalVector.normalize()<length*0.5f)
{
orthogonalVector = direction ^ osg::Vec3(0.0f, 0.0f, 1.0f);
orthogonalVector.normalize();
}
return orthogonalVector;
}示例4: set
void set(const osg::Vec3d& start, osg::Vec3d& end, float ratio=FLT_MAX)
{
_hit=false;
_index = 0;
_ratio = ratio;
_s = start;
_d = end - start;
_length = _d.length();
_d /= _length;
}示例5: computePosition
void GliderManipulator::computePosition(const osg::Vec3& eye,const osg::Vec3& lv,const osg::Vec3& up)
{
osg::Vec3 f(lv);
f.normalize();
osg::Vec3 s(f^up);
s.normalize();
osg::Vec3 u(s^f);
u.normalize();
osg::Matrixd rotation_matrix(s[0], u[0], -f[0], 0.0f,
s[1], u[1], -f[1], 0.0f,
s[2], u[2], -f[2], 0.0f,
0.0f, 0.0f, 0.0f, 1.0f);
_eye = eye;
_distance = lv.length();
_rotation = rotation_matrix.getRotate().inverse();
}示例6: if
osg::ref_ptr<osg::Geode> createRefGeometry( osg::Vec3 p, double len )
{
osg::ref_ptr<osg::Geode> geode = new osg::Geode;
if ( _drawingFlag==1 )
{
osg::ref_ptr<osg::Geometry> geometry = new osg::Geometry;
osg::ref_ptr<osg::Vec3Array> vertices = new osg::Vec3Array;
// Joint
vertices->push_back( osg::Vec3(-len, 0.0, 0.0) );
vertices->push_back( osg::Vec3( len, 0.0, 0.0) );
vertices->push_back( osg::Vec3( 0.0,-len, 0.0) );
vertices->push_back( osg::Vec3( 0.0, len, 0.0) );
vertices->push_back( osg::Vec3( 0.0, 0.0,-len) );
vertices->push_back( osg::Vec3( 0.0, 0.0, len) );
// Bone
vertices->push_back( osg::Vec3( 0.0, 0.0, 0.0) );
vertices->push_back( p );
geometry->addPrimitiveSet( new osg::DrawArrays(osg::PrimitiveSet::LINES, 0, 8) );
geometry->setVertexArray( vertices.get() );
geode->addDrawable( geometry.get() );
}
else if ( _drawingFlag==2 )
{
osg::Quat quat;
osg::ref_ptr<osg::Box> box = new osg::Box( p*0.5, p.length(), len, len );
quat.makeRotate( osg::Vec3(1.0,0.0,0.0), p );
box->setRotation( quat );
geode->addDrawable( new osg::ShapeDrawable(box.get()) );
}
return geode;
}示例7: applyConstrainedTranslation
//.........这里部分代码省略.........
rot.makeRotate(dirVec, localHitNormal);
//std::cout << "flipped = " << rot.x()<<","<<rot.y()<<","<<rot.z()<<","<<rot.w() << " ... angle=" << acos(rot.w())*2 << ", indegrees=" << osg::RadiansToDegrees(acos(rot.w()))*2 << std::endl;
}
osg::Vec3 rotEulers = QuatToEuler(rot);
//std::cout << "newHitNormal:\t" << localHitNormal.x()<<","<<localHitNormal.y()<<","<<localHitNormal.z() << std::endl;
if ((_mode==COLLIDE)||(_mode==COLLIDE_THRU)||(_mode==STICK))
{
// Let the collisionPoint be just a bit before the real
// hitpoint (to avoid numerical imprecision placing the
// node behind the plane):
osg::Vec3 collisionPoint = localHitPoint - (localHitNormal * 0.01);
// place the node at the collision point
setTranslation(collisionPoint.x(), collisionPoint.y(), collisionPoint.z());
BROADCAST(this, "ssfff", "collide", hitNode->id->s_name, osg::RadiansToDegrees(rotEulers.x()), osg::RadiansToDegrees(rotEulers.y()), osg::RadiansToDegrees(rotEulers.z()));
if (_mode==COLLIDE)
{
// SLIDE along the hit plane with the left over energy:
// ie, project the remaining vector onto the surface we
// just intersected with.
//
// using:
// cos(theta) = distToSurface / remainderVector length
//
double cosTheta = (dirVec * -localHitNormal) ; // dot product
osg::Vec3 remainderVector = (localPos + v) - localHitPoint;
double distToSurface = cosTheta * remainderVector.length();
osg::Vec3 slideVector = remainderVector + (localHitNormal * distToSurface);
// pseudo-recursively apply remainder of bounce:
applyConstrainedTranslation( slideVector );
}
else if (_mode==COLLIDE_THRU)
{
// allow the node to pass thru (ie, just apply the
// translation):
//setTranslation(v.x(), v.y(), v.z());
osg::Vec3 newPos = localPos + v;
setTranslation(newPos.x(), newPos.y(), newPos.z());
}
return;
}
else if (_mode==BOUNCE)
{
// bounce returns a translation mirrored about the hit
// normal to the surface
// the new direction vector is a rotated version
// of the original, about the localHitNormal:
//osg::Vec3 newDir = (rot * 2.0) * -dirVec;
osg::Vec3 newDir = (rot * (rot * -dirVec));
newDir.normalize();
//std::cout << "newDir = " << newDir.x()<<","<<newDir.y()<<","<<newDir.z() << std::endl;
示例8: planePointDistanceRef
float cvr::planePointDistanceRef(const osg::Vec3 & planePoint,
const osg::Vec3 & planeNormal, const osg::Vec3 & point)
{
return ((point - planePoint) * planeNormal) / planeNormal.length();
}示例9: calculateAngle
double CVehicle::calculateAngle(osg::Vec3 vecA,osg::Vec3 vecB)
{
double angle,angleA,angleB;
angle = acos(vecA * vecB / (vecA.length() * vecB.length()));
if( angle < 0.0001)
{
angle = 0.0;
return angle;
}
//求得vecA vecB分别与x轴正向的夹角
angleA = acos( vecA.x() / vecA.length() );
if( vecA.y() >= 0 )
angleA = angleA;
if( vecA.y() < 0 )
angleA = 2.0 * osg::PI - angleA;
angleB = acos( vecB.x() / vecB.length() );
if( vecB.y() >= 0 )
angleB = angleB;
if( vecB.y() < 0 )
angleB = 2.0 * osg::PI - angleB;
//得到两向量间的夹角，通过angleA angleB的关系来判断旋转的方向
if( angleA > angleB && (angleA - angleB) <= osg::PI )
angle = -1.0 * acos(vecA * vecB / (vecA.length() * vecB.length()));
if( angleA > angleB && (angleA - angleB) > osg::PI)
angle = acos(vecA * vecB / (vecA.length() * vecB.length())) ;
if( angleA < angleB && (angleB - angleA) <= osg::PI )
angle = acos(vecA * vecB / (vecA.length() * vecB.length()));
if( angleA < angleB && (angleB - angleA) > osg::PI)
angle = -1.0 * acos(vecA * vecB / (vecA.length() * vecB.length())) ;
return angle;
}示例10: setAxis
void setAxis(const osg::Vec3 &a)
{
axis_ = a / a.length();
}