radius

functions to compute the vertex radii in different way. functions to set the vertices length, to compute the total surface and volume of the MTG

openalea.hydroroot.radius.compute_length(g, length=0.0001)

Set the length of each vertex of the MTG

Parameters:

• g – (MTG)

• length – (float) - vertices length (Default value = 1.e-4)

Returns:

-g

openalea.hydroroot.radius.compute_relative_position(g)

Compute the position of each segment relative to the axis bearing it. Add the properties “position” and “relative_position” to the MTG. g.properties()[‘position’] is in meter the distance from the tip in unit of g.property(‘length’), in hydroroot must be m g.properties()[‘relative_position’] is the distance from the tip relative to the axis bearing it (base is 1, tip is 0)

Parameters:

g – (MTG)

Returns:

• g

openalea.hydroroot.radius.compute_surface(g)

Compute the total surface of the MTG

in hydroroot length unit is the m so the surface is in square meters

Parameters:

g – (MTG)

Returns:

• g

• surface in square length unit of g.property(‘radius’) and g.property(‘length’)

openalea.hydroroot.radius.compute_volume(g)

Compute the total volume of the MTG

in hydroroot length unit is the m so the volume is in cubic meters

Parameters:

g – (MTG)

Returns:

• g

• volume in cubic length unit of g.property(‘radius’) and g.property(‘length’)

openalea.hydroroot.radius.cont_radius(g, r_base, r_tip)

Compute the radius of each segment of a root system. Set radius for elements of a mtg with an increase rate computed from given base and tip radius in a continuous way.

Parameters:

• g – (MTG)

• r_base – (float) - radius of the base

• r_tip – (float) - radius of the tip

Returns:

• g

openalea.hydroroot.radius.discont_radius(g, r_base, r_tip)

Compute the radius of each segment of a root system.

Set radius for elements of a mtg with an increase rate computed from the length of the longest axis and its base and tip radius.

Radius can be discontinuous e.g. for a young/small lateral on an old root, the young root radius is very small initially compared to the old one.

Parameters:

• g – (MTG)

• r_base – (float) - radius of the base

• r_tip – (float) - radius of the tip

Returns:

• g

openalea.hydroroot.radius.ordered_radius(g, ref_radius=0.0001, order_decrease_factor=0.5)

Compute the radius of each segment of a root system.

Set radius for elements of a mtg with fixed decrease between each order.

ref_radius: reference radius of the primary root (in m) order_decrease_factor: radius decrease factor applied when increasing order

Parameters:

• g – (MTG)

• ref_radius – the radius of the primary root (Default value = 1e-4)

• order_decrease_factor – then the decrease factor per order (Default value = 0.5)

Returns:

• g

if primary root as a radius \(r\), the first order lateral has a radius of \(r \beta\), the second order lateral \(r \beta^2\), with \(\beta\) the order decrease factor

openalea.hydroroot.radius.radius(g)

calculate the radius from the property diameter :param g: :return:

Download the source file ../../src/openalea/hydroroot/radius.py.