Two-dimensional part drawings and automatic assemb

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Two-dimensional part drawings automatic assembly algorithm and implementation

. Whether the States cut algorithm flow state P. 6 No point of intersection (Figure 7 (a) P in the intersection point is not); if there is a population of Pl or P e on the entity, then the entity and the contour of a boundary entity re-homes, this time may provide that: If the other point entities on the left, outside the deleted or when the upper side, P for the intersection point, or no intersection. ② These intersection points by the entity e from start to finish in order, between the P set. Figure 7 (b) shows, the entity e and contour sets (only one within the outline of the figure) of the intersection for the Pd, P, Po, P A, so that the entity itself will be added to the starting point and end point, according to the starting point the end of the list in order of formation of P (Figure 7 (c) below). In order to improve the speed, this step can step in on the demand side of the intersection when the side of the establishment list, the intersection will be obtained in order each inserted into P in the list. 3) Check the entity e is the starting point in the contour set of P Pr, ie, checking whether P P. Intersection set. If the Profs on P, then P moves toward the physical end of a small enough distance to ensure that P is not on any profile that entity. 4) Determine the visibility of P: If P outside the outer contour,[link widoczny dla zalogowanych], then P can be seen; if the P profile, including less than, the P power visible; Otherwise, P is not visible. Determine whether the point P within a closed contour can be either from the P point for a ray, if the ray and the contour points have to cross an odd entity, then the P within an outline; if intersection points is even, then P in the profile l66 Southeast University, Vol 29 L of the outline of the outline (b) - Chen workers thirty-three} - Workers thirty-three jF = Wu Yang. Trapped 7 intersection set of P outside the list. Ray and outline the requirements to pay the same when dealing with the intersection points, with step 2) except as required to 5) according to the real starting point P and the intersection set the visibility of P, the interval to be cut or covered entity. Reduction by the theory of computer graphics known uj: a profile cut by more than one entity, the entity from the beginning to the end to teach physical point of intersection with the contour interval in paragraphs separated by contour cut, if the starting point can be seen from the starting point to see the odd paragraph the even segments are cut or covered; if the starting point is not visible, even from the starting point of the segment can be seen, the odd segments are cut or covered.