SmApiBrepComputeMassProperties

Defined in SM_API/inc/SmApiQueries.h

SmApiStatus SmApiBrepComputeMassProperties(

const SmBrep *pBrep,

double dRelativeAccuracy,

double dDensity,

const SmPoint3d &crOrigin,

double &rdArea,

double &rdVolume,

double &rdMass,

SmPoint3d &rCentroid,

SmVector3d &rMomentsOfInertia,

SmVector3d &rProductsOfInertia,

)

Parameters:

• pBrep – [in ]: Brep to query (closed manifold solid; read-only)

• dRelativeAccuracy –

  [in ]: Relative accuracy, clamped to [1e-4, 1e-1]; non-finite is

  rejected with SM_ERR_INVALID_INPUT

• dDensity –

  [in ]: Uniform mass density (mass = density * volume); must be a

  valid double >= SM_EFF_ZERO (1e-12), else

  SM_ERR_INVALID_INPUT

• crOrigin –

  [in ]: Origin the moments/products are taken about (axes parallel

  to world axes); pass the centroid for centroidal inertia.

  Must be finite, else SM_ERR_INVALID_INPUT

• rdArea – [out]: Total surface area

• rdVolume – [out]: Enclosed volume

• rdMass – [out]: Mass = dDensity * volume

• rCentroid –

  [out]: Mass centroid (centre of gravity) in world coordinates;

  independent of crOrigin

• rMomentsOfInertia –

  [out]: Mass moments of inertia (Ixx, Iyy, Izz) about axes through

  crOrigin parallel to the world axes

• rProductsOfInertia –

  [out]: Mass products of inertia about crOrigin as raw positive

  integrals (Iyz, Izx, Ixy); tensor off-diagonals are negatives