diff options
Diffstat (limited to 'nuttx/graphics/nxglib/nxglib_circlepts.c')
| -rw-r--r-- | nuttx/graphics/nxglib/nxglib_circlepts.c | 171 |
1 files changed, 0 insertions, 171 deletions
diff --git a/nuttx/graphics/nxglib/nxglib_circlepts.c b/nuttx/graphics/nxglib/nxglib_circlepts.c deleted file mode 100644 index 811953dfc..000000000 --- a/nuttx/graphics/nxglib/nxglib_circlepts.c +++ /dev/null @@ -1,171 +0,0 @@ -/**************************************************************************** - * graphics/nxglib/nxglib_circlepts.c - * - * Copyright (C) 2011 Gregory Nutt. All rights reserved. - * Author: Gregory Nutt <gnutt@nuttx.org> - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * 3. Neither the name NuttX nor the names of its contributors may be - * used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS - * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE - * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, - * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS - * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED - * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN - * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - * - ****************************************************************************/ - -/**************************************************************************** - * Included Files - ****************************************************************************/ - -#include <nuttx/config.h> - -#include <string.h> -#include <errno.h> -#include <fixedmath.h> - -#include <nuttx/nx/nxglib.h> - -/**************************************************************************** - * Pre-Processor Definitions - ****************************************************************************/ -/* Trigonometry */ - -#define SIN_0p0 0 /* sin(0) = 0 */ -#define COS_0p0 1 /* cos(0) = 1 */ -#define SIN_22p5 25080 /* sin(22.5) = 25080 / 65536 */ -#define COS_22p5 60547 /* cos(22.5) = 60547 / 65536 */ -#define SIN_45p0 46341 /* sin(45) = 46341 / 65536 */ -#define COS_45p0 SIN_45p0 /* cos(45) = sin(45) */ - -/* Named indices into the 16 circle points generated by nxgl_circlepts */ - -#define POINT_0p0 0 -#define POINT_22p5 1 -#define POINT_45p0 2 -#define POINT_67p5 3 -#define POINT_90p0 4 -#define POINT_112p5 5 -#define POINT_135p0 6 -#define POINT_157p5 7 -#define POINT_180p0 8 -#define POINT_202p5 9 -#define POINT_225p0 10 -#define POINT_247p5 11 -#define POINT_270p0 12 -#define POINT_292p5 13 -#define POINT_315p0 14 -#define POINT_337p5 15 -#define NCIRCLE_POINTS 16 - -/**************************************************************************** - * Private Types - ****************************************************************************/ - -/**************************************************************************** - * Private Data - ****************************************************************************/ - -/**************************************************************************** - * Public Data - ****************************************************************************/ - -/**************************************************************************** - * Private Functions - ****************************************************************************/ - -/**************************************************************************** - * Public Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: nxgl_circlepts - * - * Description: - * Given a description of a circle, return a set of 16 points on the - * circumference of the circle. These points may then be used by - * nx_drawcircle() or related APIs to draw a circle outline. - * - * Input parameters: - * center - A pointer to the point that is the center of the circle - * radius - The radius of the circle in pixels. - * circle - A pointer the first entry in an array of 16 points where the - * circle points will be returned. - * - * Returned value: - * None - * - ****************************************************************************/ - -void nxgl_circlepts(FAR const struct nxgl_point_s *center, nxgl_coord_t radius, - FAR struct nxgl_point_s *circle) -{ - nxgl_coord_t xoffs; - nxgl_coord_t yoffs; - - /* 0, 90, 180, and 270 degrees are the easiest */ - - circle[POINT_0p0].x = center->x + radius; - circle[POINT_0p0].y = center->y; - circle[POINT_90p0].x = center->x; - circle[POINT_90p0].y = center->y + radius; - circle[POINT_180p0].x = center->x - radius; - circle[POINT_180p0].y = center->y; - circle[POINT_270p0].x = center->x; - circle[POINT_270p0].y = center->y - radius; - - /* Now 22.5, 67.5, 112.5, 157.5, 202.5, 247.5, 292.5, and 337.5 */ - - xoffs = b16toi(b16muli(COS_22p5, radius) + b16HALF); - yoffs = b16toi(b16muli(SIN_22p5, radius) + b16HALF); - - circle[POINT_22p5].x = center->x + xoffs; - circle[POINT_22p5].y = center->y + yoffs; - circle[POINT_157p5].x = center->x - xoffs; - circle[POINT_157p5].y = center->y + yoffs; - circle[POINT_202p5].x = center->x - xoffs; - circle[POINT_202p5].y = center->y - yoffs; - circle[POINT_337p5].x = center->x + xoffs; - circle[POINT_337p5].y = center->y - yoffs; - - circle[POINT_67p5].x = center->x + yoffs; - circle[POINT_67p5].y = center->y + xoffs; - circle[POINT_112p5].x = center->x - yoffs; - circle[POINT_112p5].y = center->y + xoffs; - circle[POINT_247p5].x = center->x - yoffs; - circle[POINT_247p5].y = center->y - xoffs; - circle[POINT_292p5].x = center->x + yoffs; - circle[POINT_292p5].y = center->y - xoffs; - - /* Finally, 45.0, 135.0, 225.0, 315.0 */ - - xoffs = b16toi(b16muli(COS_45p0, radius) + b16HALF); - - circle[POINT_45p0].x = center->x + xoffs; - circle[POINT_45p0].y = center->y + xoffs; - circle[POINT_135p0].x = center->x - xoffs; - circle[POINT_135p0].y = center->y + xoffs; - circle[POINT_225p0].x = center->x - xoffs; - circle[POINT_225p0].y = center->y - xoffs; - circle[POINT_315p0].x = center->x + xoffs; - circle[POINT_315p0].y = center->y - xoffs; -} |