pcb and initial code from https://github.com/das-labor/borgware-2d.git
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107 lines
2.9 KiB
107 lines
2.9 KiB
/* Copyright (c) 2010 Jan Lieven
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include <limits.h>
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#include "../config.h"
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#include "../pixel.h"
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#include "../util.h"
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#include "../random/prng.h"
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#if (UNUMCOLS <= (UCHAR_MAX / 2)) && (UNUMROWS <= (UCHAR_MAX / 2))
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typedef unsigned char coord_t;
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#else
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typedef unsigned int coord_t;
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#endif
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#define P (1u)
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#define NX (UNUM_COLS - 1u)
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#define NY (UNUM_ROWS - 1u)
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#if UNUM_ROWS == UNUM_COLS
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static coord_t const dcomp[] = {0, P, NX};
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#define xdcomp dcomp
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#define ydcomp dcomp
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#else
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static coord_t const xdcomp[] = {0, P, NX};
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static coord_t const ydcomp[] = {0, P, NY};
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#endif
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void ltn_ant() {
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clear_screen(0);
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struct {
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coord_t x, y;
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coord_t ox, oy; /* Used to set old pixels to brightness 2 */
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coord_t dx, dy; /* Vector can only be (0,1),(1,0),(0,-1),(-1,0) */
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} ant;
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unsigned char temp;
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unsigned int cycles = 500;
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/* Random start position and direction */
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ant.x = random8() % UNUM_COLS;
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ant.y = random8() % UNUM_ROWS;
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/* Make sure we do have a valid vector */
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ant.dx = xdcomp[random8() % 3];
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do {
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ant.dy = ydcomp[random8() % 3];
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} while(ant.dx == ant.dy);
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ant.ox = ant.x;
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ant.oy = ant.y;
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while(cycles != 0) {
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/* If the pixel is not set turn it on */
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if(get_pixel((pixel) {ant.x, ant.y}) == 0) {
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setpixel((pixel) {ant.x, ant.y}, 3);
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temp = ant.dx;
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ant.dx = ant.dy;
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ant.dy = -temp; /* Turn 90 degrees to the right */
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/* Lets the last pixel be darker than the latest */
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if((ant.ox != ant.x) || (ant.oy != ant.y))
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setpixel((pixel) {ant.ox, ant.oy}, 2);
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ant.ox = ant.x;
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ant.oy = ant.y;
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} else {
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setpixel((pixel) {ant.x, ant.y}, 0);
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temp = ant.dy;
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ant.dy = ant.dx;
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ant.dx = -temp; /* Turn 90 degrees to the left */
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}
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wait(100);
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/* Playing field is modeled after a torus */
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ant.x = (coord_t)(ant.x + ant.dx) % UNUM_COLS;
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ant.y = (coord_t)(ant.y + ant.dy) % UNUM_ROWS;
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cycles--;
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}
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wait(300);
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}
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