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Rhino C++ API
8.14
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#include <opennurbs_plus_massprop.h>
Public Attributes | |
| bool | m__bReserved1 |
| bool | m__bReserved2 |
| bool | m__bReserved3 |
| int | m__reserved |
| double | m__reserved1 |
| double | m__reserved2 |
| double | m__reserved3 |
| double | m__reserved4 |
| double | m__reserved5 |
| double | m__reserved6 |
| double | m__reserved7 |
| double | m__reserved8 |
| bool | m_bValidCentroid |
| bool | m_bValidFirstMoments |
| bool | m_bValidMass |
| bool | m_bValidProductMoments |
| bool | m_bValidSecondMoments |
| double | m_ccs_xx |
| double | m_ccs_xx_err |
| double | m_ccs_xy |
| double | m_ccs_xy_err |
| double | m_ccs_yy |
| integral of "yy dm" over the length/area/volume More... | |
| double | m_ccs_yy_err |
| double | m_ccs_yz |
| integral of "yz dm" over the length/area/volume More... | |
| double | m_ccs_yz_err |
| double | m_ccs_zx |
| integral of "zx dm" over the length/area/volume More... | |
| double | m_ccs_zx_err |
| uncertainty in calculation More... | |
| double | m_ccs_zz |
| integral of "zz dm" over the length/area/volume More... | |
| double | m_ccs_zz_err |
| uncertainty in calculation More... | |
| double | m_mass |
| double | m_mass_err |
| uncertainty in calculation More... | |
| int | m_mass_type |
| double | m_world_x |
| double | m_world_x_err |
| uncertainty in calculation More... | |
| double | m_world_xx |
| double | m_world_xx_err |
| double | m_world_xy |
| double | m_world_xy_err |
| double | m_world_y |
| integral of "y dm" over the length/area/volume More... | |
| double | m_world_y_err |
| uncertainty in calculation More... | |
| double | m_world_yy |
| integral of "yy dm" over the length/area/volume More... | |
| double | m_world_yy_err |
| double | m_world_yz |
| integral of "yz dm" over the length/area/volume More... | |
| double | m_world_yz_err |
| double | m_world_z |
| integral of "z dm" over the length/area/volume More... | |
| double | m_world_z_err |
| uncertainty in calculation More... | |
| double | m_world_zx |
| integral of "zx dm" over the length/area/volume More... | |
| double | m_world_zx_err |
| uncertainty in calculation More... | |
| double | m_world_zz |
| integral of "zz dm" over the length/area/volume More... | |
| double | m_world_zz_err |
| uncertainty in calculation More... | |
| double | m_x0 |
| CENTROID - in world coordinate system. More... | |
| double | m_x0_err |
| double | m_y0 |
| = m_world_y / m_mass More... | |
| double | m_y0_err |
| double | m_z0 |
| = m_world_z / m_mass More... | |
| double | m_z0_err |
Copyright (c) 1993-2022 Robert McNeel & Associates. All rights reserved. OpenNURBS, Rhinoceros, and Rhino3D are registered trademarks of Robert McNeel & Associates.
THIS SOFTWARE IS PROVIDED "AS IS" WITHOUT EXPRESS OR IMPLIED WARRANTY. ALL IMPLIED WARRANTIES OF FITNESS FOR ANY PARTICULAR PURPOSE AND OF MERCHANTABILITY ARE HEREBY DISCLAIMED.
For complete openNURBS copyright information see http://www.opennurbs.org. Description: This class is used to returned results of mass properties calculations.
Note: The constructor for this class is meaningful and initializes m_mass_type to ON_UNSET_INT_INDEX. Users of arrays of this class should use ON_ClassArray. If you insist on using ON_SimpleArray<ON_MassProperties>, be sure to properly initialize all elements using the explicit constructor or Create(). Elements created with AppendNew() need a call to Create()! See RH-68376 for details.
| ON_MassProperties::ON_MassProperties | ( | ) |
| ON_MassProperties::~ON_MassProperties | ( | ) |
| double ON_MassProperties::Area | ( | ) | const |
Description: Returns area of the surface or mesh if the mass properties calculation was an area calculation. Returns: Area of the surface or mesh if m_mass_type = 2 and zero otherwise.
| ON_3dPoint ON_MassProperties::Centroid | ( | ) | const |
FUNCTIONAL INTERFACE for those who wish to ignore error terms.
Returns: Centroid of object.
| ON_DEPRECATED ON_Matrix* ON_MassProperties::CentroidCoordIntertiaMatrix | ( | ON_Matrix * | matrix = nullptr | ) | const |
WARNING The function returned by this function is not an inertial matrix. So its been deprecated. Description: If moments are valid, then the 3x3 moment matrix with respect to centroid coordinates is returned.
Parameters: martix - [in] If you want to fill in an existing matrix, pass a pointer to that matrix. Otherwise a matrix will be created and returned. returned. Returns: The moment matrix or nullptr if the moments are not valid.
m_ccs_xx m_ccs_xy m_ccs_xz m_ccs_xy m_ccs_yy m_ccs_yz m_ccs_xz m_ccs_yz m_ccs_zz
See Also: WorldCoordIntertiaMatrix
| ON_3dVector ON_MassProperties::CentroidCoordMomentsOfInertia | ( | ) | const |
Description: Calculates the moments of inertia about centroid coordinate axes.
Returns: Moments of inertia with respect to centroid coordinate system. WorldCoordMomentsOfInertia().x = integral of ((y-y0)^2 + (z-z0)^2) dm WorldCoordMomentsOfInertia().y = integral of ((z-z0)^2 + (x-x0)^2) dm WorldCoordMomentsOfInertia().z = integral of ((x-x0)^2 + (y-y0)^2) dm where (x0,y0,z0) = centroid. Remarks: What is meant by "moments of inertia" varies widely in textbooks and papers. The values returned here are the integrals listed in the Returns section. Some applications may want the values from WorldCoordSecondMoments() instead of the values returned here.
| bool ON_MassProperties::CentroidCoordPrincipalMoments | ( | double * | pxx, |
| ON_3dVector & | Ax, | ||
| double * | pyy, | ||
| ON_3dVector & | Ay, | ||
| double * | pzz, | ||
| ON_3dVector & | Az | ||
| ) | const |
WARNING NOT PRINCIPAL MOMENTS of INERTIA!!! consider using CentroidCoordPrincipalMomentsOfInertia. Description: Calculates the eigenvalues and eigenvectors of the moments matrix with respect to centroid coordinates. m_ccs_xx m_ccs_xy m_ccs_xz m_ccs_xy m_ccs_yy m_ccs_yz m_ccs_xz m_ccs_yz m_ccs_zz Parameters: pxx - [out] principal moment Ax - [out] principal axis for pxx pyy - [out] principal moment Ay - [out] principal axis for pyy pzz - [out] principal moment Az - [out] principal axis for pzz Returns: True if successful. See Also: WorldCoordPrincipalMoments
| bool ON_MassProperties::CentroidCoordPrincipalMomentsOfInertia | ( | double * | pxx, |
| ON_3dVector & | Ax, | ||
| double * | pyy, | ||
| ON_3dVector & | Ay, | ||
| double * | pzz, | ||
| ON_3dVector & | Az | ||
| ) | const |
Description: Calculates the principal moments of inertia and principal axes with respect to centroid coordinates.
Parameters: pxx - [out] principal moment Ax - [out] principal axis for pxx pyy - [out] principal moment Ay - [out] principal axis for pyy pzz - [out] principal moment Az - [out] principal axis for pzz Returns: True if successful. See Also: WorldCoordPrincipalMoments
| ON_3dVector ON_MassProperties::CentroidCoordRadiiOfGyration | ( | ) | const |
Description: Calculates the radii of gyration about centroid coordinate axes. Returns: Radii of gyration with respect to centroid coordinate system. CentroidCoordRadiiOfGyration().x = sqrt(integral of ((y-y0)^2 + (z-z0)^2) dm/M) CentroidCoordRadiiOfGyration().y = sqrt(integral of ((z-z0)^2 + (x-x0)^2) dm/M) CentroidCoordRadiiOfGyration().z = sqrt(integral of ((z-z0)^2 + (y-y0)^2) dm/M) where (x0,y0,z0) = centroid. Remarks: What is meant by "radii of gyration" varies widely in textbooks and papers. The values returned here are the integrals listed in the Returns section.
| ON_3dVector ON_MassProperties::CentroidCoordSecondMoments | ( | ) | const |
Description: If m_bValidSecondMoments is true, then the centroid coordinate second moments are returned in a vector (m_ccs_xx,m_ccs_yy,m_ccs_zz) If m_bValidSecondMoments is false, then (0,0,0) is returned. Returns: Second moments with respect to centroid coordinate system. CentroidCoordSecondMoments().x = integral of (x-x0)^2 dm CentroidCoordSecondMoments().y = integral of (y-y0)^2 dm CentroidCoordSecondMoments().z = integral of (z-z0)^2 dm where (x0,y0,z0) = centroid. See Also: WorldCoordSecondMoments
| double ON_MassProperties::Count | ( | ) | const |
Description: Returns count of points if the mass properties calculation was a pointmass calculation. Returns: Count of points if m_mass_type = 0 and zero otherwise.
| void ON_MassProperties::Create | ( | ) |
Set values to constructor defaults.
| void ON_MassProperties::Dump | ( | ON_TextLog & | dump | ) | const |
Description: Prints a text description of the mass properties information. Parameters: dump - [in] target for text dump information.
| double ON_MassProperties::Length | ( | ) | const |
Description: Returns length of the curve if the mass properties calculation was a length calculation. Returns: Length of the curve if m_mass_type = 1 and zero otherwise.
| bool ON_MassProperties::Sum | ( | int | count, |
| const ON_MassProperties * | summands, | ||
| bool | bAddTo = false |
||
| ) |
Description: Sum a list of mass properties together to get an aggregate mass. Parameters: count - [in] number of elements in the summands array. summands - [in] array of mass properties to add bAddTo - [in] if true, then the summands are added to the existing mass. Returns: True if successful.
| bool ON_MassProperties::Transform | ( | const ON_Xform & | X | ) |
Description: On input *this contains the mass properties for some geometry G, On exit *this contains the mass properties for the transformed geometry X(G).
Parameters: X - [in] When m_mass_type==3 ( for a solid) X must be an Affine transformation.
When m_mass_type==2 ( for a surface) X must be a similarity transformation
(see ON_Xform.IsAffine(), and ON_Xform::IsSimilarity()) For example perspective transformations are not allowed. Returns: True if successful. Details: The Area of a transformed object can not be calculated from the area of the original object if the transform is not a similarity, like a non-uniform scaling.
| double ON_MassProperties::Volume | ( | ) | const |
Description: Returns volume of the solid if the mass properties calculation was a volume calculation. Returns: Volume of the solid if m_mass_type = 3 and zero otherwise.
| ON_3dVector ON_MassProperties::WorldCoordFirstMoments | ( | ) | const |
Description: If m_bValidFirstMoments is true, then the world coordinate first moments are returned in a vector (m_world_x,m_world_y,m_world_z) If m_bValidFirstMoments is false, then (0,0,0) is returned. Returns: First moments with respect to world coordinate system. WorldCoordFirstMoments().x = integral of x dm WorldCoordFirstMoments().y = integral of y dm WorldCoordFirstMoments().z = integral of z dm
| ON_DEPRECATED ON_Matrix* ON_MassProperties::WorldCoordIntertiaMatrix | ( | ON_Matrix * | matrix = nullptr | ) | const |
WARNING The matrix returned by this function is not an Inertia Matrix. So this function is being made obsolete Description: If moments are valid, then the 3x3 inertia matrix with respect to world coordinates is returned. This matrix is sometimes called the "inertia tensor". Parameters: martix - [in] If you want to fill in an existing matrix, pass a pointer to that matrix. Otherwise a matrix will be created and returned. returned. Returns: The inertia matrix or nullptr if the moments are not valid.
See Also: CentroidCoordIntertiaMatrix
| ON_3dVector ON_MassProperties::WorldCoordMomentsOfInertia | ( | ) | const |
Description: Calculates the moments of inertia about world coordinate axes.
Returns: Moments of inertia with respect to world coordinate system. WorldCoordMomentsOfInertia().x = integral of (y^2 + z^2) dm WorldCoordMomentsOfInertia().y = integral of (z^2 + x^2) dm WorldCoordMomentsOfInertia().z = integral of (x^2 + y^2) dm Remarks: What is meant by "moments of inertia" varies widely in textbooks and papers. The values returned here are the integrals listed in the Returns section. Some applications may want the values from WorldCoordSecondMoments() instead of the values returned here.
| bool ON_MassProperties::WorldCoordPrincipalMoments | ( | double * | pxx, |
| ON_3dVector & | Ax, | ||
| double * | pyy, | ||
| ON_3dVector & | Ay, | ||
| double * | pzz, | ||
| ON_3dVector & | Az | ||
| ) | const |
WARNING NOT PRINCIPAL MOMENTS of INERTIA!!! consider using WorldCoordPrincipalMomentsOfInertia. Description: Calculates the eigenvalues and eigenvectors of moments matrix in world coordinates. m_world_xx m_world_xy m_world_xz m_world_xy m_world_yy m_world_yz m_world_xz m_world_yz m_world_zz
Parameters: pxx - [out] principal moment Ax - [out] principal axis for pxx pyy - [out] principal moment Ay - [out] principal axis for pyy pzz - [out] principal moment Az - [out] principal axis for pzz Returns: True if successful. See Also: CentroidCoordPrincipalMoments
| bool ON_MassProperties::WorldCoordPrincipalMomentsOfInertia | ( | double * | pxx, |
| ON_3dVector & | Ax, | ||
| double * | pyy, | ||
| ON_3dVector & | Ay, | ||
| double * | pzz, | ||
| ON_3dVector & | Az | ||
| ) | const |
Description: Calculates the principal moments of inertia and principal axes with respect to world coordinates. Parameters: pxx - [out] principal moment Ax - [out] principal axis for pxx pyy - [out] principal moment Ay - [out] principal axis for pyy pzz - [out] principal moment Az - [out] principal axis for pzz Returns: True if successful. See Also: WorldCoordPrincipalMoments
| ON_3dVector ON_MassProperties::WorldCoordRadiiOfGyration | ( | ) | const |
Description: Calculates the radii of gyration about world coordinate axes. Returns: Radii of gyration with respect to world coordinate system. WorldCoordRadiiOfGyration().x = sqrt(integral of (y^2 + z^2) dm/M) WorldCoordRadiiOfGyration().y = sqrt(integral of (z^2 + x^2) dm/M) WorldCoordRadiiOfGyration().z = sqrt(integral of (z^2 + y^2) dm/M) Remarks: What is meant by "radii of gyration" varies widely in textbooks and papers. The values returned here are the integrals listed in the Returns section.
| ON_3dVector ON_MassProperties::WorldCoordSecondMoments | ( | ) | const |
Description: If m_bValidSecondMoments is true, then the world coordinate second moments are returned in a vector (m_world_xx,m_world_yy,m_world_zz) If m_bValidSecondMoments is false, then (0,0,0) is returned. Returns: Second moments with respect to world coordinate system. WorldCoordSecondMoments().x = integral of x^2 dm WorldCoordSecondMoments().y = integral of y^2 dm WorldCoordSecondMoments().z = integral of z^2 dm See Also: CentroidCoordSecondMoments
| bool ON_MassProperties::m__bReserved1 |
| bool ON_MassProperties::m__bReserved2 |
| bool ON_MassProperties::m__bReserved3 |
| int ON_MassProperties::m__reserved |
| double ON_MassProperties::m__reserved1 |
| double ON_MassProperties::m__reserved2 |
| double ON_MassProperties::m__reserved3 |
| double ON_MassProperties::m__reserved4 |
| double ON_MassProperties::m__reserved5 |
| double ON_MassProperties::m__reserved6 |
| double ON_MassProperties::m__reserved7 |
| double ON_MassProperties::m__reserved8 |
| bool ON_MassProperties::m_bValidCentroid |
| bool ON_MassProperties::m_bValidFirstMoments |
| bool ON_MassProperties::m_bValidMass |
These flags are set to true if the calcluation was successful. If a flag is false, the corresponding values should not be used.
| bool ON_MassProperties::m_bValidProductMoments |
| bool ON_MassProperties::m_bValidSecondMoments |
| double ON_MassProperties::m_ccs_xx |
The "centroid coordinate system" (ccs) is the coordinate system with origin at the centroid and axes parallel to the world coordinate axes. SECOND MOMENTS - with respect to centroid coordinate system integral of "xx dm" over the length/area/volume
| double ON_MassProperties::m_ccs_xx_err |
uncertainty in calculation
| double ON_MassProperties::m_ccs_xy |
PRODUCT MOMENTS - with respect to centroid coordinate system integral of "xy dm" over the length/area/volume
| double ON_MassProperties::m_ccs_xy_err |
uncertainty in calculation
| double ON_MassProperties::m_ccs_yy |
integral of "yy dm" over the length/area/volume
| double ON_MassProperties::m_ccs_yy_err |
uncertainty in calculation
| double ON_MassProperties::m_ccs_yz |
integral of "yz dm" over the length/area/volume
| double ON_MassProperties::m_ccs_yz_err |
uncertainty in calculation
| double ON_MassProperties::m_ccs_zx |
integral of "zx dm" over the length/area/volume
| double ON_MassProperties::m_ccs_zx_err |
uncertainty in calculation
| double ON_MassProperties::m_ccs_zz |
integral of "zz dm" over the length/area/volume
| double ON_MassProperties::m_ccs_zz_err |
uncertainty in calculation
| double ON_MassProperties::m_mass |
MASS - count, length, area, or volume of object = integral of "dm" over the object
| double ON_MassProperties::m_mass_err |
uncertainty in calculation
| int ON_MassProperties::m_mass_type |
Determines what type of "mass" is returned. ON_UNSET_INT_INDEX = unset, 0 = point masses, 1 = length, 2 = area, 3 = volume
| double ON_MassProperties::m_world_x |
FIRST MOMENTS - with respect to world coordinate system integral of "x dm" over the length/area/volume
| double ON_MassProperties::m_world_x_err |
uncertainty in calculation
| double ON_MassProperties::m_world_xx |
SECOND MOMENTS - with respect to world coordinate system integral of "xx dm" over the length/area/volume
| double ON_MassProperties::m_world_xx_err |
uncertainty in calculation
| double ON_MassProperties::m_world_xy |
PRODUCT MOMENTS - with respect to world coordinate system integral of "xy dm" over the length/area/volume
| double ON_MassProperties::m_world_xy_err |
uncertainty in calculation
| double ON_MassProperties::m_world_y |
integral of "y dm" over the length/area/volume
| double ON_MassProperties::m_world_y_err |
uncertainty in calculation
| double ON_MassProperties::m_world_yy |
integral of "yy dm" over the length/area/volume
| double ON_MassProperties::m_world_yy_err |
uncertainty in calculation
| double ON_MassProperties::m_world_yz |
integral of "yz dm" over the length/area/volume
| double ON_MassProperties::m_world_yz_err |
uncertainty in calculation
| double ON_MassProperties::m_world_z |
integral of "z dm" over the length/area/volume
| double ON_MassProperties::m_world_z_err |
uncertainty in calculation
| double ON_MassProperties::m_world_zx |
integral of "zx dm" over the length/area/volume
| double ON_MassProperties::m_world_zx_err |
uncertainty in calculation
| double ON_MassProperties::m_world_zz |
integral of "zz dm" over the length/area/volume
| double ON_MassProperties::m_world_zz_err |
uncertainty in calculation
| double ON_MassProperties::m_x0 |
CENTROID - in world coordinate system.
= m_world_x / m_mass
| double ON_MassProperties::m_x0_err |
| double ON_MassProperties::m_y0 |
= m_world_y / m_mass
| double ON_MassProperties::m_y0_err |
| double ON_MassProperties::m_z0 |
= m_world_z / m_mass
| double ON_MassProperties::m_z0_err |
1.8.17