bool CylinderPrimitiveShape::InSpace(float u, float v, Vec3f *p, Vec3f *n) const
{
GfxTL::Quaternion< float > q;
q.RotationRad(v / m_cylinder.Radius(), m_cylinder.AxisDirection()[0],
m_cylinder.AxisDirection()[1], m_cylinder.AxisDirection()[2]);
Vec3f vvec;
q.Rotate(m_cylinder.AngularDirection(), &vvec);
*p = u * m_cylinder.AxisDirection() + m_cylinder.Radius() * vvec
+ m_cylinder.AxisPosition();
*n = vvec;
return true;
}
bool CylinderPrimitiveShape::InSpace(size_t u, size_t v, float epsilon,
const GfxTL::AABox< GfxTL::Vector2Df > &bbox, size_t uextent,
size_t vextent, Vec3f *p, Vec3f *n) const
{
GfxTL::Quaternion< float > q;
q.RotationRad((bbox.Min()[1] + epsilon * (v + .5f)) / m_cylinder.Radius(),
m_cylinder.AxisDirection()[0],
m_cylinder.AxisDirection()[1],
m_cylinder.AxisDirection()[2]);
Vec3f vvec;
q.Rotate(m_cylinder.AngularDirection(), &vvec);
*p = (bbox.Min()[0] + epsilon * (u + .5f)) * m_cylinder.AxisDirection() +
m_cylinder.Radius() * vvec + m_cylinder.AxisPosition();
*n = vvec;
return true;
}
bool ConePrimitiveShape::InSpace(size_t u, size_t v, float epsilon,
const GfxTL::AABox< GfxTL::Vector2Df > &bbox, size_t uextent,
size_t vextent, Vec3f *p, Vec3f *n) const
{
float length, angle;
if(m_cone.Angle() >= float(M_PI / 4))
{
float uf = ((float(u) + .5f) * epsilon) + bbox.Min()[0];
float vf = ((float(v) + .5f) * epsilon) + bbox.Min()[1];
length = std::sqrt(uf * uf + vf * vf);
//angle = std::atan2(vf, uf);
angle = std::atan2(uf, vf);
//angle = std::acos(GfxTL::Math< float >::Clamp(vf / length, -1.f, 1.f));
}
else
{
length = ((float(u) + .5f) * epsilon) + bbox.Min()[0];
float arcLength = ((float(v) + .5f) * epsilon) + bbox.Min()[1];
angle = (arcLength / m_cone.RadiusAtLength(length)) + float(M_PI);
}
if(angle > 2 * float(M_PI))
return false;
//float angle = ((v * epsilon) / m_cone.RadiusAtLength(std::max(abs(bbox.Min()[0]), abs(bbox.Max()[0])))
// + bbox.Min()[1]);
GfxTL::Quaternion< float > q;
q.RotationRad(angle, m_cone.AxisDirection()[0],
m_cone.AxisDirection()[1], m_cone.AxisDirection()[2]);
Vec3f vvec;
q.Rotate(m_cone.AngularDirection(), &vvec);
*p = std::sin(m_cone.Angle()) * abs(length) * vvec +
std::cos(m_cone.Angle()) * length * m_cone.AxisDirection() +
m_cone.Center();
// TODO: this is very lazy and should be optimized!
m_cone.Normal(*p, n);
return true;
}
bool ConePrimitiveShape::InSpace(float length, float arcLength, Vec3f *p,
Vec3f *n) const
{
float angle;
if(m_cone.Angle() >= float(M_PI / 4))
{
//angle = std::atan2(arcLength, length);
angle = std::atan2(length, arcLength);
length = std::sqrt(length * length + arcLength * arcLength);
// angle = std::acos(GfxTL::Math< float >::Clamp(arcLength / length, -1.f, 1.f));
}
else
angle = (arcLength / m_cone.RadiusAtLength(length)) + float(M_PI);
GfxTL::Quaternion< float > q;
q.RotationRad(angle, m_cone.AxisDirection()[0],
m_cone.AxisDirection()[1], m_cone.AxisDirection()[2]);
Vec3f vvec;
q.Rotate(m_cone.AngularDirection(), &vvec);
*p = std::sin(m_cone.Angle()) * abs(length) * vvec +
std::cos(m_cone.Angle()) * length * m_cone.AxisDirection() +
m_cone.Center();
m_cone.Normal(*p, n);
return true;
}