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66 lines
3.5 KiB
C
66 lines
3.5 KiB
C
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/*****************************************************************************/
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/* */
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/* tgi_pieslice.c */
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/* */
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/* Draw an ellipic pie slice */
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/* */
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/* */
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/* */
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/* (C) 2009, Ullrich von Bassewitz */
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/* Roemerstrasse 52 */
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/* D-70794 Filderstadt */
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/* EMail: uz@cc65.org */
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/* */
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/* */
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/* This software is provided 'as-is', without any expressed or implied */
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/* warranty. In no event will the authors be held liable for any damages */
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/* arising from the use of this software. */
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/* */
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/* Permission is granted to anyone to use this software for any purpose, */
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/* including commercial applications, and to alter it and redistribute it */
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/* freely, subject to the following restrictions: */
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/* */
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/* 1. The origin of this software must not be misrepresented; you must not */
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/* claim that you wrote the original software. If you use this software */
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/* in a product, an acknowledgment in the product documentation would be */
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/* appreciated but is not required. */
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/* 2. Altered source versions must be plainly marked as such, and must not */
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/* be misrepresented as being the original software. */
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/* 3. This notice may not be removed or altered from any source */
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/* distribution. */
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/* */
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/*****************************************************************************/
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#include <tgi.h>
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#include <tgi/tgi-kernel.h>
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#include <cc65.h>
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/*****************************************************************************/
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/* Code */
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/*****************************************************************************/
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void __fastcall__ tgi_pieslice (int x, int y, unsigned char rx, unsigned char ry,
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unsigned sa, unsigned ea)
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/* Draw an ellipse pie slice with center at x/y and radii rx/ry using the
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* current drawing color. The pie slice covers the angle between sa and ea
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* (startangle and endangle), which must be in the range 0..360 (otherwise the
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* function may behave unextectedly).
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*/
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{
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/* Draw an arc ... */
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tgi_arc (x, y, rx, ry, sa, ea);
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/* ... and close it */
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tgi_line (x, y, x + tgi_imulround (rx, cc65_cos (sa)), y - tgi_imulround (ry, cc65_sin (sa)));
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tgi_line (x, y, x + tgi_imulround (rx, cc65_cos (ea)), y - tgi_imulround (ry, cc65_sin (ea)));
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}
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