Functions | |
HC_KEY | Insert_Circular_Arc (const HC_POINT *point1, const HC_POINT *point2, const HC_POINT *point3) |
HC_KEY | DInsert_Circular_Arc (const HCD_POINT *point1, const HCD_POINT *point2, const HCD_POINT *point3) |
HC_KEY Insert_Circular_Arc | ( | const HC_POINT * | point1, |
const HC_POINT * | point2, | ||
const HC_POINT * | point3 | ||
) |
Generates a portion of the circumference of a circle.
point1 | - An x-y-z triplet for the coordinates of one of three ordered on the circumference of the circle. (A simple of three elements may also be used in most languages.) Passed by reference always. |
point2 | - As above. |
point3 | - As above. |
A portion of the circumference of a circle is added to the current segment. The order of the specified points is important. Specifically, the arc begins at the first point, is drawn through the second point and continues through the third point.
Circular arcs are grouped with lines, polylines, and elliptical arcs for rendering purposes. The rendition of an arc can be altered through the use of Line Color, Line Weight, and Line Pattern. An arc's Visibility and Selectability can be controlled by the "line" or "polyline" keywords.
If you only work in two dimensions, specify all the z coordinates as zero. The system will automatically take note.
Make sure the points are not colinear. The system checks and issues an error message if all three points lie on a line, or if two points are coincident.
If there is an error the Insert routine will return a-1.
Zooming in close on very large circular arcs results in a flat appearance.
HC_KEY DInsert_Circular_Arc | ( | const HCD_POINT * | point1, |
const HCD_POINT * | point2, | ||
const HCD_POINT * | point3 | ||
) |
Similar to Insert_Circular_Arc() but accepts and/or returns double-precision values. This command can only be used when the application source includes the HOOPS double-precision header, hcd.h.
point1 | - An x-y-z triplet for the coordinates of one of three ordered on the circumference of the circle. (A simple of three elements may also be used in most languages.) Passed by reference always. |
point2 | - As above. |
point3 | - As above. |
No additional details. See Insert_Circular_Arc().