Functions | |
HC_KEY | Insert_Ellipse (const HC_POINT *center, const HC_POINT *major, const HC_POINT *minor) |
HC_KEY | DInsert_Ellipse (const HCD_POINT *center, const HCD_POINT *major, const HCD_POINT *minor) |
Generates a flat, infinitely thin, colored-in elliptical object.
center | - An x-y-z triplet for the coordinates of the center of the ellipse. (A simple array of three elements may also be used in most languages.) Passed by reference always. |
major | - An x-y-z triplet for the coordinates of the intersection of the ellipse and its major axis. Passed by reference always. |
minor | - An x-y-z triplet for the coordinates of the intersection of the ellipse and its minor axis. Passed by reference always. |
A closed, flat, colored-in ellipse is added to the current segment.
Ellipses are grouped with circles, polygons, shells, and meshes for rendering purposes. The rendition of the interior of the ellipse can be adjusted with changes to Face Color and Face Pattern. The circumference of an ellipse can be made distinct from the interior through the use of Edge Color, Edge Pattern and Edge Weight. An ellipse's Visibility and Selectability are controlled by the "edge", "face", and "polygon" 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 are coincident.
If there is an error the Insert routine returns a-1.
HC_KEY DInsert_Ellipse | ( | const HCD_POINT * | center, |
const HCD_POINT * | major, | ||
const HCD_POINT * | minor | ||
) |
Similar to Insert_Ellipse() 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.
center | - An x-y-z triplet for the coordinates of the center of the ellipse. (A simple array of three elements may also be used in most languages.) Passed by reference always. |
major | - An x-y-z triplet for the coordinates of the intersection of the ellipse and its major axis. Passed by reference always. |
minor | - An x-y-z triplet for the coordinates of the intersection of the ellipse and its minor axis. Passed by reference always. |
No additional details. See Insert_Ellipse().