Winellipse - Texas Instruments TI-89 Developer's Manual

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WinEllipse

Declaration: void WinEllipse (WINDOW * w , WIN_COORDS x0 , WIN_COORDS y0 ,
WIN_COORDS a0 , WIN_COORDS b0 )
Category(ies): Windows
Description: Draw an ellipse in a window with center at ( x0 , y0 ) and major/minor axes
( a0 , b0 ). The ellipse is drawn in the current attribute (A_NORMAL,
A_REVERSE, A_XOR) as set by WinAttr.
Inputs: w
x0 , y0 — Center of ellipse in window coordinates.
a0 , b0 — Major/minor axes size in pixels.
Outputs: None
Assumptions: Current attribute (set by WinAttr) is A_NORMAL (set), A_REVERSE
(clear), or A_XOR.
Side Effects: The pixels on the TI-89 and the TI-92 are square so setting a0 and b0
equal will draw a circle on both platforms.
Availability: All versions of the TI-89 / TI-92 Plus.There is no routine to draw a filled
ellipse.
TI-89 / TI-92 Plus
Differences: None
See Also: WinAttr
Example: See WinDupStat for an example that draws an ellipse to the screen and to
a second backup screen (with one call).
TI-89 / TI-92 Plus Developer Guide
Appendix A: System Routines — Windows
— WINDOW struct of a previously opened window.
Not for Distribution Beta Version January 26, 2001