Creo tookit geometric traversal and evaluator
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CREO-TOOLKIT ( PRO-TOOLKIT)GEOMETRIC TRAVERSAL AND
EVALUATOR
Sandip Jadhav
Harshil Oza
CENTRE FOR COMPUTATIONAL TECHNOLOGIES - (CCTECH) WWW.CCTECH.CO.IN
TOPICS
Geometrical Representation
Evaluator
Example Code
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GEOMETRY HIERARCHY
Geometry in Pro/Engineer repressed by below terminology Face
Surface
Contour
Edge
Curve
Part
Face
Contour
Edge
Curve
Surface
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GEOMETRY TERMS
• An ideal geometric representation, that is, an infinite plane
Surface
• A trimmed surface. A face has one or more contours
Face
• A closed loop on a face. A contour can belong to one face only
Contour
• The boundary of a trimmed surfaceEdge
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GEOMETRY TERMS EXAMPLE 1
Face A has 1 contour and 4 edges
Edge E2 is the intersection of faces A and B
Edge E2 is a component of contours C1 and C2
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GEOMETRY TERMS EXAMPLE 2
Face A has 2 contours
Edges E1,E2,E3,E4 forming outer ,E5 and E6 forming inner contour
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GEOMETRY TERMS EXAMPLE 3
Face B has 2 Outer contours and 8 edges
Face A has 1 contour and 6 edges
Face C has 1 contour and 4 edges
Model Creation: This part was extruded from a rectangular cross section. The feature on the top was added later as an extruded protrusion in the shape of a semicircleCENTRE FOR COMPUTATIONAL TECHNOLOGIES - (CCTECH) WWW.CCTECH.CO.IN
GEOMETRY TERMS EXAMPLE 3
Face A has 1 contour and 6 edges.
Face B has 1 contour and 4 edges.
Face C has 1 contour and 4 edges.
Face D has 1 contour and 4 edges.
Model Creation: This part was extruded from a cross section identical to Face A. In the Sketcher, the top boundary was sketched with two lines and an arc CENTRE FOR COMPUTATIONAL TECHNOLOGIES - (CCTECH) WWW.CCTECH.CO.IN
GEOMETRY TERMS EXAMPLE 4
Face B has 3 Contour
2 Outer and 1 inner contour
Face A has 1 contour and 8 edges.
Model Creation: This part was extruded from a cross section identical to Face A
CENTRE FOR COMPUTATIONAL TECHNOLOGIES - (CCTECH) WWW.CCTECH.CO.IN
GEOMETRY TRAVERSAL API
Walk through the surfaces of a part, using ProSolidSurfaceVisit()
Walk through the contours of each surface, using ProSurfaceContourVisit()
Walk through the edges of each contour, using ProContourEdgeVisit()
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EVALUATOR
The geometry of each edge or curve in Pro/ENGINEER is described as a set of three parametric equations that represent the values of X, Y, and Z as functions of the independent parameter, t
For a surface, the three equations are functions of the two independent parameters u and v
CENTRE FOR COMPUTATIONAL TECHNOLOGIES - (CCTECH) WWW.CCTECH.CO.IN
EVALUATOR
The Pro/TOOLKIT functions described in this section provide the ability to evaluate the parametric edge and surface functions, that is, find the values and derivatives of X, Y and Z for the specified values of t, or u and v.
They also provide for reverse evaluation
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CURVE EVALUATOR API
ProCurveDataGet()
ProCurveParamEval()
ProCurveXyzdataEval()
ProCurveParamByLengthEval()
Retrieves the geometric representation data for the specified curve(example :for a Line it gives start and end points)
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CURVE EVALUATOR API
ProCurveDataGet()
ProCurveParamEval()
ProCurveXyzdataEval()
ProCurveParamByLengthEval()
Finds the corresponding normalized parameter on the curve, given the XYZ point
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CURVE EVALUATOR API
ProCurveDataGet()
ProCurveParamEval()
ProCurveXyzdataEval()
ProCurveParamByLengthEval()
Evaluates the specified curve at the parameter
CENTRE FOR COMPUTATIONAL TECHNOLOGIES - (CCTECH) WWW.CCTECH.CO.IN
CURVE EVALUATOR API
ProCurveDataGet()
ProCurveParamEval()
ProCurveXyzdataEval()
ProCurveParamByLengthEval()
Finds the length of the specified curve between two given parameters
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SURFACE EVALUATOR APIProSurfaceDataGet()
ProSurfaceParamEval()
ProSurfaceUvpntVerify()
ProSurfacePrincipalCrvtEval()
ProSurfaceXyzdataEval()
Retrieves the geometric representation data of the specified surfaceSurface Type
UV Min-Max
XYZ min-Max
Orientation
Id etc
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SURFACE EVALUATOR APIProSurfaceDataGet()
ProSurfaceParamEval()
ProSurfaceUvpntVerify()
ProSurfacePrincipalCrvtEval()
ProSurfaceXyzdataEval()
Finds the closest corresponding UV point on the surface, given the xyz point
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SURFACE EVALUATOR APIProSurfaceDataGet()
ProSurfaceParamEval()
ProSurfaceUvpntVerify()
ProSurfacePrincipalCrvtEval()
ProSurfaceXyzdataEval()
Verifies whether the specified UV point lies within the surface boundaries
CENTRE FOR COMPUTATIONAL TECHNOLOGIES - (CCTECH) WWW.CCTECH.CO.IN
SURFACE EVALUATOR APIProSurfaceDataGet()
ProSurfaceParamEval()
ProSurfaceUvpntVerify()
ProSurfacePrincipalCrvtEval()
ProSurfaceXyzdataEval()
Finds principal curvatures and directions of the surface at the given UV point
CENTRE FOR COMPUTATIONAL TECHNOLOGIES - (CCTECH) WWW.CCTECH.CO.IN
SURFACE EVALUATOR APIProSurfaceDataGet()
ProSurfaceParamEval()
ProSurfaceUvpntVerify()
ProSurfacePrincipalCrvtEval()
ProSurfaceXyzdataEval() Evaluates the surface in the specified UV point.
CENTRE FOR COMPUTATIONAL TECHNOLOGIES - (CCTECH) WWW.CCTECH.CO.IN
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