commit 15a2b9d8cc73f5e35394d594dd67e66c13b2f416
Author: anon <anon@user.com>
Date: Wed, 17 Dec 2025 12:13:17 +0000
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+ GNU GENERAL PUBLIC LICENSE
+ Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
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+
+ 17. Interpretation of Sections 15 and 16.
+
+ If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+ <one line to give the program's name and a brief idea of what it does.>
+ Copyright (C) <year> <name of author>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+ If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+ <program> Copyright (C) <year> <name of author>
+ This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+ You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+ The GNU General Public License does not permit incorporating your program
+into proprietary programs. If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License. But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.
diff --git a/README.md b/README.md
@@ -0,0 +1,67 @@
+# Bot Evolution Simulation
+
+
+
+This program is a terrarium of little bots who undergo ruthless evolution in a 2D world with it's own rules.
+
+## Usage
+
+The code is written in [Pixilang](https://www.warmplace.ru/soft/pixilang/) and could either be ran through a graphical program, or a command line.
+Thus, execute ```main.pixi``` file.
+Read more regarding the language in it's [documentation](https://www.warmplace.ru/soft/pixilang/manual.php).
+
+## Explanations
+
+The behavior of the world and bots could easily be changed though modifying the values of constant variables in ```main.pixi``` file.
+
+At first, the map is randomly filled with the following colored **cells**:
+
+ - an empty cell
+
+ - an 'alive' bot
+
+ - a 'food' cell
+
+ - a 'water' cell
+
+Every **bot** is then gets assigned the variables of **hunger** and **thirst**.
+While both of those variables values are *greater than 0* - the bot is 'alive'.
+A **bot** 'dies' when either **hunger** and/or **thirst** value gets *equal or less than 0*.
+A 'dead' **bot** changes color and acts like an *empty cell*:
+
+ - a 'dead' bot
+
+Each **bot's** values of **hunger** and **thirst** change when completing commands from it's **genome**.
+**Genome** here is an array of random numbers from 0 to 15, representing one of 16 possible commands.
+
+Commands with numbers 0-7 are for *displacement*:
+
+```
+0 1 2
+3 . 4
+5 6 7
+```
+
+For example, command *5* would mean for a **bot** to move to the **cell** which is diagonally to the lower-left (one cell down and one cell left).
+
+Commands with numbers 8-15 are for *consumption*:
+
+```
+8 9 10
+11 . 12
+13 14 15
+```
+
+For example, command *12* would mean for a **bot** to eat or drink (depending on whether it is food or water) from the **cell** to it's right.
+
+Completion of one command decreases the values of **hunger** and **thirst** by 1.
+However, **bot** can increase these values by successfully completing *consumption* command on a *food* or *water* **cell**, thus, keeping it alive for longer.
+
+**Bots** wait in queue to execute commands based on their **genome** and they can only execute 1 command when it is their turn.
+This queue is looped until more than half of all **bots** on the map 'die'.
+To restore the population - the 'dead' **bots** are randomly re-spawned near still 'alive' ones.
+The 'children' **bots** which were just re-spawned are assigned the same **genome** as the 'parent' **bot** nearby which they appeared, with a slight chance of *mutation*.
+*Mutation* has a chance to change 1 or more commands within 'child' **bot's** **genome** causing it to behave a differently that it's 'parent'.
+
+After that a new 'generation' of bots stands in a queue to execute one of their **genome** command, tying to outperform their parents.
+
diff --git a/bibl.pixi b/bibl.pixi
@@ -0,0 +1,112 @@
+// ==========
+// Draw a grid within a given box
+// ----------
+// IN:
+// * INT(gs) - cell size
+// * INT(x) - box x
+// * INT(y) - box y
+// * INT(w) - box width
+// * INT(h) - box height
+// * PIXEL(col) - box color
+// ----------
+// ==========
+fn grid($gs, $x, $y, $w, $h, $col) {
+ // draw vert stripes
+ $i = 0
+ while $i <= ($w / $gs - 2) {
+ $i = $i + 1
+ $indent = $gs * $i
+
+ line($x + $indent, $y, $x + $indent, $h - abs($y) - 1, $col)
+ }
+
+ // draw horiz stripes
+ $i = 0
+ while $i <= ($h / $gs - 2) {
+ $i = $i + 1
+ $indent = $gs * $i
+
+ line($x, $y + $indent, $w - abs($x) - 1, $y + $indent, $col)
+ }
+}
+
+
+// ==========
+// Direct conversion of INT to STR
+// ----------
+// IN:
+// * INT(num)
+// ----------
+// OUT:
+// * STR(num)
+// ==========
+fn n2s($num) {
+ $str=""
+ sprintf($str, "%d", $num)
+
+ ret($str)
+}
+
+
+// ==========
+// Refresh & print function
+// ----------
+// IN:
+// * STR(str) - string to print
+// * INT(x) - x coordinate
+// * INT(y) - y coordinate
+// * PIXEL(f_col) - string color
+// * PIXEL(b_col) - background color
+// ----------
+// ==========
+fn rprint($str, $x, $y, $f_col, $b_col) {
+ $x_size = get_text_xsize($str) + 10
+ $y_size = get_text_ysize($str) + 5
+
+ $x_coord = $x - ($x_size / 2)
+ $y_coord = $y - ($y_size / 2)
+
+ // color previously printed string
+ fbox($x_coord, $y_coord, $x_size, $y_size, $b_col)
+ // print string
+ print($str, $x, $y, $f_col)
+}
+
+
+// ==========
+// Get pixel's color at given coordinates
+// ----------
+// IN:
+// * INT(x) - pixel x
+// * INT(y) - pixel y
+// ----------
+// OUT:
+// * PIXEL(col)
+// ==========
+fn get_pixel_color($x, $y) {
+ // get screen dimensions
+ $w = WINDOW_XSIZE
+ $h = WINDOW_YSIZE
+
+ $r = new($w, $h, INT16)
+ $g = new($w, $h, INT16)
+ $b = new($w, $h, INT16)
+ // split the screen on RED GREEN and BLUE
+ // and get an array 1D array of color values
+ split_rgb(0, get_screen(), $r, $g, $b)
+
+ // convert coordinates to the array index
+ $from_above = (($h / 2) - abs($y) + 1) * $w
+ $from_right = ($w / 2) - $x
+ $index = $from_above - $from_right
+
+ // join RED GREEN and BLUE values
+ $color = get_color($r[$index], $g[$index], $b[$index])
+
+ // remove arrays from the memory
+ remove($r)
+ remove($g)
+ remove($b)
+
+ ret($color)
+}
diff --git a/bots.pixi b/bots.pixi
@@ -0,0 +1,28 @@
+fn bot_life_status($bot) {
+ // if bot died of hunger or dehydration
+ if (BOTS[$bot].energy == 0) || (BOTS[$bot].thirst == 0) {
+ // pronounce bot deceased
+ BOTS[$bot].is_alive = 0
+
+ // change cell type to empty (0)
+ CELLS[BOTS[$bot].cell].type = 0
+
+ // erase bot from it's current position
+ fbox(BOTS[$bot].x_coord, BOTS[$bot].y_coord, CELL_SIZE - 1, CELL_SIZE - 1, COL_BOT_DEAD)
+ //print("X", BOTS[$bot].x_coord + (CELL_SIZE / 2), BOTS[$bot].y_coord + (CELL_SIZE / 2), BLACK)
+ }
+}
+
+fn num_bots_alive() {
+ $count = 0
+ $i = 0
+ while ($i < BOTS_QTY) {
+ if (BOTS[$i].is_alive == 1) {
+ $count = $count + 1
+ }
+
+ $i = $i + 1
+ }
+
+ ret($count)
+}
diff --git a/field.pixi b/field.pixi
@@ -0,0 +1,144 @@
+fn get_cell_ul_diag($i) {
+ /*
+ x * *
+ * o *
+ * * *
+ */
+ $cell = $i - (COLUMNS + 1)
+
+ // if index exceeds array size
+ if ($i % COLUMNS == 0) {
+ $cell = $i - 1
+ }
+
+ if ($cell < 0) {
+ $cell = (COLUMNS * ROWS) + $cell
+ }
+
+ ret($cell)
+}
+
+fn get_cell_above($i) {
+ /*
+ * x *
+ * o *
+ * * *
+ */
+ $cell = $i - COLUMNS
+
+ // if index exceeds array size
+ if ($cell < 0) {
+ $cell = (COLUMNS * ROWS) + $cell
+ }
+
+ ret($cell)
+}
+
+fn get_cell_ur_diag($i) {
+ /*
+ * * x
+ * o *
+ * * *
+ */
+ $cell = $i - (COLUMNS - 1)
+
+ // if index exceeds array size
+ if (($i + 1) % COLUMNS == 0) {
+ $cell = $i - (COLUMNS * 2 - 1)
+ }
+
+ if ($cell < 0) {
+ $cell = (COLUMNS * ROWS) + $cell
+ }
+
+ ret($cell)
+}
+
+fn get_cell_left($i) {
+ /*
+ * * *
+ x o *
+ * * *
+ */
+ $cell = $i - 1
+
+ // if index exceeds array size
+ if ($i % COLUMNS == 0) {
+ $cell = $i + (COLUMNS - 1)
+ }
+
+ ret($cell)
+}
+
+
+fn get_cell_right($i) {
+ /*
+ * * *
+ * o x
+ * * *
+ */
+ $cell = $i + 1
+
+ // if index exceeds array size
+ if (($i + 1) % COLUMNS == 0) {
+ $cell = $i - (COLUMNS - 1)
+ }
+
+ ret($cell)
+}
+
+fn get_cell_dl_diag($i) {
+ /*
+ * * *
+ * o *
+ x * *
+ */
+ $cell= $i + (COLUMNS - 1)
+
+ // if index exceeds array size
+ if ($i % COLUMNS == 0) {
+ $cell = $i + (COLUMNS * 2 - 1)
+ }
+
+ if ($cell > COLUMNS * ROWS - 1) {
+ $cell = $cell - (COLUMNS * ROWS)
+ }
+
+ ret($cell)
+}
+
+fn get_cell_below($i) {
+ /*
+ * * *
+ * o *
+ * x *
+ */
+ $cell = $i + COLUMNS
+
+ // if index exceeds array size
+ if ($cell >= (COLUMNS * ROWS)) {
+ $cell = $cell - (COLUMNS * ROWS)
+ }
+
+ ret($cell)
+}
+
+fn get_cell_dr_diag($i) {
+ /*
+ * * *
+ * o *
+ * * x
+ */
+ $cell = $i + (COLUMNS + 1)
+
+ // if index exceeds array size
+ if (($i + 1) % COLUMNS == 0) {
+ $cell = $i + 1
+ }
+
+ if ($cell > COLUMNS * ROWS - 1) {
+ $cell = $cell - (COLUMNS * ROWS)
+ }
+
+ ret($cell)
+}
diff --git a/gene.pixi b/gene.pixi
@@ -0,0 +1,96 @@
+fn execute_gene($bot, $gene) {
+ // go UP-LEFT DIAGONAL
+ if (BOTS[$bot].genome[$gene] == 0) || (BOTS[$bot].genome[$gene] == 8) {
+ // get the next cell
+ $next = get_cell_ul_diag(BOTS[$bot].cell)
+ }
+
+ // go UP
+ if (BOTS[$bot].genome[$gene] == 1) || (BOTS[$bot].genome[$gene] == 9) {
+ // get the next cell
+ $next = get_cell_above(BOTS[$bot].cell)
+ }
+
+ // go UP-RIGHT DIAGONAL
+ if (BOTS[$bot].genome[$gene] == 2) || (BOTS[$bot].genome[$gene] == 10) {
+ // get the next cell
+ $next = get_cell_ur_diag(BOTS[$bot].cell)
+ }
+
+ // go LEFT
+ if (BOTS[$bot].genome[$gene] == 3) || (BOTS[$bot].genome[$gene] == 11) {
+ // get the next cell
+ $next = get_cell_left(BOTS[$bot].cell)
+ }
+
+ // go RIGHT
+ if (BOTS[$bot].genome[$gene] == 4) || (BOTS[$bot].genome[$gene] == 12) {
+ // get the next cell
+ $next = get_cell_right(BOTS[$bot].cell)
+ }
+
+ // go DOWN-LEFT DIAGONAL
+ if (BOTS[$bot].genome[$gene] == 5) || (BOTS[$bot].genome[$gene] == 13) {
+ // get the next cell
+ $next = get_cell_dl_diag(BOTS[$bot].cell)
+ }
+
+ // go DOWN
+ if (BOTS[$bot].genome[$gene] == 6) || (BOTS[$bot].genome[$gene] == 14) {
+ // get the next cell
+ $next = get_cell_below(BOTS[$bot].cell)
+ }
+
+ // go DOWN-RIGHT DIAGONAL
+ if (BOTS[$bot].genome[$gene] == 7) || (BOTS[$bot].genome[$gene] == 15) {
+ // get the next cell
+ $next = get_cell_dr_diag(BOTS[$bot].cell)
+ }
+
+ // move gene
+ if (BOTS[$bot].genome[$gene] >= 0) && (BOTS[$bot].genome[$gene] <= 7) {
+ // if the next cell is empty
+ if (CELLS[$next].type == 0) {
+ // erase bot from it's current position
+ fbox(BOTS[$bot].x_coord, BOTS[$bot].y_coord, CELL_SIZE - 1, CELL_SIZE - 1, COL_FIELD)
+
+ // update previous cell's type to empty (0)
+ CELLS[BOTS[$bot].cell].type = 0
+
+ // update bot's coordinates and cell
+ BOTS[$bot].x_coord = CELLS[$next].x_coord
+ BOTS[$bot].y_coord = CELLS[$next].y_coord
+ BOTS[$bot].cell = $next
+
+ // update next cell's type to bot (1)
+ CELLS[$next].type = 1
+ }
+ }
+
+ // eat/drink gene
+ if (BOTS[$bot].genome[$gene] >= 8) && (BOTS[$bot].genome[$gene] <= 15) {
+ // if the next cell is food
+ if (CELLS[$next].type == 2) {
+ // bot gets quenches it's hunger
+ BOTS[$bot].energy = BOTS[$bot].energy + 8
+ }
+
+ // if the next cell is water
+ if (CELLS[$next].type == 3) {
+ // bot gets quenches it's thirst
+ BOTS[$bot].thirst = BOTS[$bot].thirst + 4
+ }
+ }
+
+ // bot gets hungry
+ BOTS[$bot].energy = BOTS[$bot].energy - 1
+ // bot gets thirsty
+ BOTS[$bot].thirst = BOTS[$bot].thirst - 1
+
+ // update life indicator
+ //$indic = (BOTS[$bot].energy + BOTS[$bot].thirst) / 2
+
+ // redraw the bot
+ fbox(BOTS[$bot].x_coord, BOTS[$bot].y_coord, CELL_SIZE - 1, CELL_SIZE - 1, COL_BOT_ALIVE)
+ //print(n2s($indic), BOTS[$bot].x_coord + (CELL_SIZE / 2), BOTS[$bot].y_coord + (CELL_SIZE / 2), WHITE)
+}
diff --git a/main.pixi b/main.pixi
@@ -0,0 +1,430 @@
+include "bibl.pixi"
+include "field.pixi"
+include "gene.pixi"
+include "bots.pixi"
+
+
+// initialize the environment
+rand_seed(get_seconds())
+set_pixel_size(1)
+
+// =========================
+
+// initial (also max) active bots quantity
+BOTS_QTY = 64
+
+// grid size
+CELL_SIZE = 13
+
+// field size
+WINDOW_W = WINDOW_XSIZE - 350
+WINDOW_H = WINDOW_YSIZE - 50
+FIELD_W = WINDOW_W - (WINDOW_W % CELL_SIZE)
+FIELD_H = WINDOW_H - (WINDOW_H % CELL_SIZE)
+
+//% probability of mutation at every generation
+BOTS_MUT = 7
+
+// initial bot characteristics
+BOTS_ENERGY = BOTS_QTY / 2
+BOTS_THIRST = BOTS_QTY / 3
+
+// number of different genes actions
+BOTS_GENE_NUM = 16
+/* List genome actions:
+ - move ~ 8
+ - eat/drink ~ 8
+*/
+// number of genes in bot's genome
+BOTS_GENOME_SIZE = 32
+
+// food and water generation settings
+WATER_SIZE = 2.3
+FOOD_FREQ = BOTS_QTY * 3
+
+// colors
+COL_BG = #343434
+COL_FIELD = #E3DAC9
+COL_GRID = #F0EAD6
+
+COL_BOT_ALIVE = #4F7942
+COL_BOT_DEAD= #C0C0C0
+COL_FOOD = #EE204E
+COL_WATER = #545AA7
+
+// =========================
+
+// field X position
+FIELD_X = FIELD_W / -2
+// field Y position
+FIELD_Y = FIELD_H / -2
+// number of horizontally places cells
+COLUMNS = FIELD_W / CELL_SIZE
+// number of vertically places cells
+ROWS = FIELD_H / CELL_SIZE
+
+// array of grid cells and their properties
+CELLS = new(COLUMNS * ROWS, INT)
+/* List of cell properties:
+ - x_coord
+ - y_coord
+ - type: 0 - empty
+ 1 - bot
+ 2 - food
+ 3 - water
+*/
+
+// array of bots and their properties
+BOTS = new(BOTS_QTY, INT)
+/* List of cell properties:
+ - x_coord
+ - y_coord
+ - cell
+ - energy
+ - thirst
+ - is_alive
+ - genome
+*/
+
+// =========================
+
+// draw the background
+clear(COL_BG)
+// draw the field
+fbox(FIELD_X, FIELD_Y, FIELD_W, FIELD_H, COL_FIELD)
+// draw the grid
+grid(CELL_SIZE, FIELD_X, FIELD_Y, FIELD_W, FIELD_H, COL_GRID)
+box(FIELD_X, FIELD_Y, FIELD_W, FIELD_H, COL_GRID)
+
+// =========================
+
+// itemize cells and set values to the default properties
+i = 0
+x = FIELD_X
+y = FIELD_Y
+while (i < COLUMNS * ROWS) {
+ // create array of properties
+ CELLS[i] = new()
+
+ // set cell's properties
+ CELLS[i].x_coord = x + 1
+ CELLS[i].y_coord = y + 1
+ // set cell's type to empty (0)
+ CELLS[i].type = 0
+
+ x = x + CELL_SIZE
+
+ // if the right edge is reached
+ if (x >= FIELD_X * -1) {
+ x = FIELD_X
+ y = y + CELL_SIZE
+ }
+
+ i = i + 1
+}
+
+// draw water cells on the map
+i = 0
+while (i < COLUMNS * ROWS) {
+ rand_num = rand() % (COLUMNS * ROWS)
+ chance_num = 30
+ bonus_num = 0
+
+ // if the cell above is water
+ // increase chances of the current cell becoming a water
+ if (CELLS[get_cell_above(i)].type == 3) {
+ bonus_num = COLUMNS * ROWS / WATER_SIZE
+ }
+
+ // if the cell on the left is water
+ // increase chances of the current cell becoming a water
+ if (CELLS[get_cell_left(i)].type == 3) {
+ bonus_num = COLUMNS * ROWS / WATER_SIZE
+ }
+
+ // if the cell above and on the left are both water
+ // make a 100% change of this cell becoming a water
+ // (to prevent generation of 'islands')
+ if (CELLS[get_cell_above(i)].type == 3) &&
+ (CELLS[get_cell_left(i)].type == 3) {
+ bonus_num = COLUMNS * ROWS
+ }
+
+ if (rand_num <= chance_num + bonus_num) {
+ fbox(CELLS[i].x_coord, CELLS[i].y_coord, CELL_SIZE - 1, CELL_SIZE - 1, COL_WATER)
+ effector(EFF_SPREAD_UP, 10, COL_WATER, CELLS[i].x_coord, CELLS[i].y_coord, CELL_SIZE - 1, CELL_SIZE - 1)
+ effector(EFF_SPREAD_DOWN, 10, COL_WATER, CELLS[i].x_coord, CELLS[i].y_coord, CELL_SIZE - 1, CELL_SIZE - 1)
+ effector(EFF_SPREAD_LEFT, 10, COL_WATER, CELLS[i].x_coord, CELLS[i].y_coord, CELL_SIZE - 1, CELL_SIZE - 1)
+ effector(EFF_SPREAD_RIGHT, 10, COL_WATER, CELLS[i].x_coord, CELLS[i].y_coord, CELL_SIZE - 1, CELL_SIZE - 1)
+
+ // set cell's type to water (3)
+ CELLS[i].type = 3
+ }
+
+ i = i + 1
+}
+
+// draw food cells on the map
+i = 0
+while (i < COLUMNS * ROWS) {
+ rand_num = rand() % (COLUMNS * ROWS)
+
+ if (rand_num <= FOOD_FREQ) && (CELLS[i].type == 0) {
+ fbox(CELLS[i].x_coord, CELLS[i].y_coord, CELL_SIZE - 1, CELL_SIZE - 1, COL_FOOD)
+
+ // set cell's type to food (2)
+ CELLS[i].type = 2
+ }
+
+ i = i + 1
+}
+
+// generate initial bots and draw them on the map
+count = 0
+while (count != BOTS_QTY) {
+ rand_num = rand() % (COLUMNS * ROWS)
+
+ // if selected cell is empty
+ if (CELLS[rand_num].type == 0) {
+ // create array of properties
+ BOTS[count] = new()
+
+ // set bot's properties
+ BOTS[count].x_coord = CELLS[rand_num].x_coord
+ BOTS[count].y_coord = CELLS[rand_num].y_coord
+ BOTS[count].cell = rand_num
+ BOTS[count].energy = BOTS_ENERGY
+ BOTS[count].thirst = BOTS_THIRST
+ BOTS[count].is_alive = 1
+
+ // create bot's genome
+ BOTS[count].genome = new(BOTS_GENOME_SIZE, INT)
+
+ // fillin bot's genome with random genes (later actions)
+ gene = 0
+ while (gene < BOTS_GENOME_SIZE) {
+ BOTS[count].genome[gene] = rand() % BOTS_GENE_NUM
+
+ gene = gene + 1
+ }
+
+ // set cell's type to bot (1)
+ CELLS[rand_num].type = 1
+
+ // life indicator
+ //indic = (BOTS[count].energy + BOTS[count].thirst) / 2
+
+ fbox(BOTS[count].x_coord, BOTS[count].y_coord, CELL_SIZE - 1, CELL_SIZE - 1, COL_BOT_ALIVE)
+ //print(n2s(indic), BOTS[count].x_coord + (CELL_SIZE / 2), BOTS[count].y_coord + (CELL_SIZE / 2), WHITE)
+
+ count = count + 1
+ }
+
+ else {
+ continue
+ }
+}
+
+// =========================
+
+// current generation of bots
+generation = 0
+// expected lifetime of bots
+lifetime = (BOTS_ENERGY + BOTS_THIRST) / 2
+
+print("Generation:", (FIELD_W / 2) + 60, -50, WHITE)
+rprint(n2s(generation), (FIELD_W / 2) + 130, -50, RED, COL_BG)
+
+print("Lifetime:", (FIELD_W / 2) + 60, 50, WHITE)
+rprint(n2s(lifetime), (FIELD_W / 2) + 130, 50, RED, COL_BG)
+
+// start the main loop
+main:
+
+// number of steps before generation change
+steps = 0
+// current bot's genome
+bot = 0
+// current bot's gene
+gene = 0
+while 1 {
+ // if more than half of bots are alive
+ if (num_bots_alive() > (BOTS_QTY / 2)) {
+
+ // if selected bot is alive
+ if (BOTS[bot].is_alive == 1) {
+ // perform an action that corresponds to
+ // the current gene
+ execute_gene(bot, gene)
+
+ // update bot's life status
+ bot_life_status(bot)
+ }
+
+ // switch controls to the next bot
+ bot = bot + 1
+
+ // reset the bot counter
+ if (bot == BOTS_QTY) {
+ bot = 0
+ gene = gene + 1
+
+ steps = steps + 1
+
+ // reset the gene counter
+ if (gene == BOTS_GENOME_SIZE) {
+ gene = 0
+
+ }
+ }
+
+ while get_event() {
+ if EVT[EVT_TYPE] == EVT_QUIT {
+ halt
+ }
+ }
+
+ frame()
+ }
+
+ else {
+ // new generation
+ generation = generation + 1
+ lifetime = steps
+
+ rprint(n2s(generation), (FIELD_W / 2) + 130, -50, RED, COL_BG)
+ rprint(n2s(lifetime), (FIELD_W / 2) + 130, 50, RED, COL_BG)
+
+ goto next
+ }
+}
+
+// copy genome of all alive bots
+// (with a certain prob. of mutation)
+// and 'program' new generation of bots.
+next:
+
+ i = 0
+ while (i < BOTS_QTY) {
+ // if bot is deceased
+ if (BOTS[i].is_alive == 0) {
+ // choose a random alive bot
+ while 1 {
+ // generate random bot ID
+ parent_bot = rand() % BOTS_QTY
+
+ if (BOTS[parent_bot].is_alive == 1) {
+ break
+ }
+ }
+
+ // select position of the child bot
+ child_bot = get_child_cell(parent_bot)
+
+ // set bot's properties
+ BOTS[i].x_coord = CELLS[child_bot].x_coord
+ BOTS[i].y_coord = CELLS[child_bot].y_coord
+ BOTS[i].cell = child_bot
+ BOTS[i].energy = BOTS_ENERGY
+ BOTS[i].thirst = BOTS_THIRST
+ BOTS[i].is_alive = 1
+
+ // copy alive bot's genome
+ gene = 0
+ while (gene < BOTS_GENOME_SIZE) {
+ // chance of gene's mutation
+ rand_mut = rand() % 100
+
+ // gene mutates
+ if (rand_mut < BOTS_MUT) {
+ BOTS[i].genome[gene] = rand() % BOTS_GENE_NUM
+ }
+
+ // gene stays the same
+ else {
+ BOTS[i].genome[gene] = BOTS[parent_bot].genome[gene]
+ }
+
+ gene = gene + 1
+ }
+
+ // set cell's type to bot (1)
+ CELLS[child_bot].type = 1
+
+ // life indicator
+ //indic = (BOTS[i].energy + BOTS[i].thirst) / 2
+
+ fbox(BOTS[i].x_coord, BOTS[i].y_coord, CELL_SIZE - 1, CELL_SIZE - 1, COL_BOT_ALIVE)
+ //print(n2s(indic), BOTS[i].x_coord + (CELL_SIZE / 2), BOTS[i].y_coord + (CELL_SIZE / 2), WHITE)
+ }
+ // if bot is alive
+ else {
+ if (BOTS[i].energy < BOTS_ENERGY) && (BOTS[i].thirst < BOTS_THIRST) {
+ BOTS[i].energy = BOTS_ENERGY
+ BOTS[i].thirst = BOTS_THIRST
+ }
+
+ // life indicator
+ //indic = (BOTS[i].energy + BOTS[i].thirst) / 2
+
+ fbox(BOTS[i].x_coord, BOTS[i].y_coord, CELL_SIZE - 1, CELL_SIZE - 1, COL_BOT_ALIVE)
+ //print(n2s(indic), BOTS[i].x_coord + (CELL_SIZE / 2), BOTS[i].y_coord + (CELL_SIZE / 2), WHITE)
+ }
+
+ i = i + 1
+ }
+
+ goto main
+
+// =========================
+
+fn get_child_cell($bot) {
+ $cell = BOTS[$bot].cell
+
+ mov:
+ // random movement from parent's position
+ $rand_mov = rand() % 8
+
+ if ($rand_mov == 0) {
+ $cell = get_cell_ul_diag($cell)
+ }
+
+ if ($rand_mov == 1) {
+ $cell = get_cell_above($cell)
+ }
+
+ if ($rand_mov == 2) {
+ $cell = get_cell_ur_diag($cell)
+ }
+
+ if ($rand_mov == 3) {
+ $cell = get_cell_left($cell)
+ }
+
+ if ($rand_mov == 4) {
+ $cell = get_cell_right($cell)
+ }
+
+ if ($rand_mov == 5) {
+ $cell = get_cell_dl_diag($cell)
+ }
+
+ if ($rand_mov == 6) {
+ $cell = get_cell_below($cell)
+ }
+
+ if ($rand_mov == 7) {
+ $cell = get_cell_dr_diag($cell)
+ }
+
+ // if selected cell in empty
+ if (CELLS[$cell].type == 0) {
+ ret($cell)
+ }
+
+ // repeat the process
+ else {
+ goto mov
+ }
+
+}
diff --git a/pix/cell-bot.png b/pix/cell-bot.png
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diff --git a/pix/cell-dead-bot.png b/pix/cell-dead-bot.png
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diff --git a/pix/cell-empty.png b/pix/cell-empty.png
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diff --git a/pix/cell-food.png b/pix/cell-food.png
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diff --git a/pix/cell-water.png b/pix/cell-water.png
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diff --git a/pix/example-simulation.gif b/pix/example-simulation.gif
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