iforce2d Chris / Mbed 2 deprecated ubxDistanceMeter

Displays distance to start location on OLED screen.

Dependencies:   mbed

u8g_line.c@0:972874f31c98, 2018-03-07 (annotated)

Committer:
iforce2d
Date:
Wed Mar 07 12:49:14 2018 +0000
Revision:
0:972874f31c98
First commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
iforce2d 0:972874f31c98 1 /*
iforce2d 0:972874f31c98 2
iforce2d 0:972874f31c98 3 u8g_line.h
iforce2d 0:972874f31c98 4
iforce2d 0:972874f31c98 5 Universal 8bit Graphics Library
iforce2d 0:972874f31c98 6
iforce2d 0:972874f31c98 7 Copyright (c) 2012, olikraus@gmail.com
iforce2d 0:972874f31c98 8 All rights reserved.
iforce2d 0:972874f31c98 9
iforce2d 0:972874f31c98 10 Redistribution and use in source and binary forms, with or without modification,
iforce2d 0:972874f31c98 11 are permitted provided that the following conditions are met:
iforce2d 0:972874f31c98 12
iforce2d 0:972874f31c98 13 * Redistributions of source code must retain the above copyright notice, this list
iforce2d 0:972874f31c98 14 of conditions and the following disclaimer.
iforce2d 0:972874f31c98 15
iforce2d 0:972874f31c98 16 * Redistributions in binary form must reproduce the above copyright notice, this
iforce2d 0:972874f31c98 17 list of conditions and the following disclaimer in the documentation and/or other
iforce2d 0:972874f31c98 18 materials provided with the distribution.
iforce2d 0:972874f31c98 19
iforce2d 0:972874f31c98 20 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
iforce2d 0:972874f31c98 21 CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
iforce2d 0:972874f31c98 22 INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
iforce2d 0:972874f31c98 23 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
iforce2d 0:972874f31c98 24 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
iforce2d 0:972874f31c98 25 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
iforce2d 0:972874f31c98 26 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
iforce2d 0:972874f31c98 27 NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
iforce2d 0:972874f31c98 28 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
iforce2d 0:972874f31c98 29 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
iforce2d 0:972874f31c98 30 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
iforce2d 0:972874f31c98 31 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
iforce2d 0:972874f31c98 32 ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
iforce2d 0:972874f31c98 33
iforce2d 0:972874f31c98 34 */
iforce2d 0:972874f31c98 35
iforce2d 0:972874f31c98 36 #include "u8g.h"
iforce2d 0:972874f31c98 37
iforce2d 0:972874f31c98 38 void u8g_DrawLine(u8g_t *u8g, u8g_uint_t x1, u8g_uint_t y1, u8g_uint_t x2, u8g_uint_t y2)
iforce2d 0:972874f31c98 39 {
iforce2d 0:972874f31c98 40 u8g_uint_t tmp;
iforce2d 0:972874f31c98 41 u8g_uint_t x,y;
iforce2d 0:972874f31c98 42 u8g_uint_t dx, dy;
iforce2d 0:972874f31c98 43 u8g_int_t err;
iforce2d 0:972874f31c98 44 u8g_int_t ystep;
iforce2d 0:972874f31c98 45
iforce2d 0:972874f31c98 46 uint8_t swapxy = 0;
iforce2d 0:972874f31c98 47
iforce2d 0:972874f31c98 48 /* no BBX intersection check at the moment, should be added... */
iforce2d 0:972874f31c98 49
iforce2d 0:972874f31c98 50 if ( x1 > x2 ) dx = x1-x2; else dx = x2-x1;
iforce2d 0:972874f31c98 51 if ( y1 > y2 ) dy = y1-y2; else dy = y2-y1;
iforce2d 0:972874f31c98 52
iforce2d 0:972874f31c98 53 if ( dy > dx )
iforce2d 0:972874f31c98 54 {
iforce2d 0:972874f31c98 55 swapxy = 1;
iforce2d 0:972874f31c98 56 tmp = dx; dx =dy; dy = tmp;
iforce2d 0:972874f31c98 57 tmp = x1; x1 =y1; y1 = tmp;
iforce2d 0:972874f31c98 58 tmp = x2; x2 =y2; y2 = tmp;
iforce2d 0:972874f31c98 59 }
iforce2d 0:972874f31c98 60 if ( x1 > x2 )
iforce2d 0:972874f31c98 61 {
iforce2d 0:972874f31c98 62 tmp = x1; x1 =x2; x2 = tmp;
iforce2d 0:972874f31c98 63 tmp = y1; y1 =y2; y2 = tmp;
iforce2d 0:972874f31c98 64 }
iforce2d 0:972874f31c98 65 err = dx >> 1;
iforce2d 0:972874f31c98 66 if ( y2 > y1 ) ystep = 1; else ystep = -1;
iforce2d 0:972874f31c98 67 y = y1;
iforce2d 0:972874f31c98 68 for( x = x1; x <= x2; x++ )
iforce2d 0:972874f31c98 69 {
iforce2d 0:972874f31c98 70 if ( swapxy == 0 )
iforce2d 0:972874f31c98 71 u8g_DrawPixel(u8g, x, y);
iforce2d 0:972874f31c98 72 else
iforce2d 0:972874f31c98 73 u8g_DrawPixel(u8g, y, x);
iforce2d 0:972874f31c98 74 err -= (uint8_t)dy;
iforce2d 0:972874f31c98 75 if ( err < 0 )
iforce2d 0:972874f31c98 76 {
iforce2d 0:972874f31c98 77 y += (u8g_uint_t)ystep;
iforce2d 0:972874f31c98 78 err += (u8g_uint_t)dx;
iforce2d 0:972874f31c98 79 }
iforce2d 0:972874f31c98 80 }
iforce2d 0:972874f31c98 81 }
iforce2d 0:972874f31c98 82