Winfilltriangle - Texas Instruments TI-89 Developer's Manual

Appendix A: System Routines — Windows

WinFillTriangle

Declaration: void WinFillTriangle (WINDOW * w , WIN_COORDS ax ,
WIN_COORDS ay , WIN_COORDS bx , WIN_COORDS by ,
WIN_COORDS cx , WIN_COORDS cy , BYTE Attr )
Category(ies): Windows
Description: Draw a filled triangle in a window. The fill includes the borders of the
triangle.
Inputs: w
ax, ay, bx,
by, cx, cy
Attr
Outputs: None
Assumptions: A_XOR is not supported.
Side Effects: None
Availability: All versions of the TI-89 / TI-92 Plus.
TI-89 / TI-92 Plus
Differences: None
See Also: WinFill
Example: The 3D grapher in HIDDEN SURFACE mode uses this routine to shade the
graph using A_REVERSE if the surface is visible and A_NORMAL if it is
hidden (by splitting the graph into 6-sided polygons and splitting those into
triangles).
TI-89 / TI-92 Plus Developer Guide
— WINDOW struct of a previously opened window.
— Coordinates of triangle.
— A_NORMAL (set) or A_REVERSE (cleared).
Not for Distribution
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Beta Version January 26, 2001