commit d77afc920b07013f6386fdcc8647d0010d7c7cc7 Author: trimill Date: Fri Jan 24 16:30:04 2025 -0500 initial commit diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..3a2202a --- /dev/null +++ b/.gitignore @@ -0,0 +1,2 @@ +bin/ +turmites diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..f288702 --- /dev/null +++ b/LICENSE @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If not, see . + +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: + + Copyright (C) + 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 +. + + 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 +. diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..d4621c3 --- /dev/null +++ b/Makefile @@ -0,0 +1,28 @@ +CFLAGS += -Wall -Wextra -pedantic -std=c17 +CFLAGS += -lraylib +CFLAGS += -O3 + +SDIR=src +ODIR=bin +BIN=turmites + +SRC=$(shell find $(SDIR) -type f -name '*.c') +SRH=$(shell find $(SDIR) -type f -name '*.h') +OBJ=$(patsubst $(SDIR)/%.c,$(ODIR)/%.o,$(SRC)) + +.PHONY: clean run + +$(BIN): $(OBJ) $(SRH) + @mkdir -p $(ODIR) + $(CC) -o $@ $(OBJ) $(CFLAGS) + +$(ODIR)/%.o: $(SDIR)/%.c $(SRH) + @mkdir -p $(ODIR) + $(CC) -c -o $@ $< $(CFLAGS) + +clean: + rm -rf $(BIN) $(ODIR) + +run: $(BIN) + ./$(BIN) + diff --git a/README.md b/README.md new file mode 100644 index 0000000..55d0c9f --- /dev/null +++ b/README.md @@ -0,0 +1,9 @@ +# turmites + +Run with + +```sh +make run +``` + +Edit `src/conf.h` to configure diff --git a/src/conf.h b/src/conf.h new file mode 100644 index 0000000..2a9ddcc --- /dev/null +++ b/src/conf.h @@ -0,0 +1,133 @@ +#pragma once +#include "main.h" + +// Edit the definitions in this file to configure the turmite + +// size of the window (pixels) +#define SCR_SIZE 800 +// size of grid cells +#define CELL_SIZE 8 +// target FPS +#define TARGET_FPS 60 + +// enable showcase mode - randomly cycle through +// turmites given N_STATES and N_COLORS +#define DO_SHOWCASE 0 +// number of ticks to simulate each turmite for +#define SHOWCASE_TIME 120 +// frames to freeze for after each showcase +#define FREEZE_FRAMES 60 + +// turmite iterations per frame +#define TICKS_PER_FRAME 10 + +// initial turmite facing +#define INIT_DIR DIR_N + +// number of states +#define N_STATES 2 +// number of colors +#define N_COLORS 2 + +// turmite colors +#define TURMITE_ALPHA 0xff +static uint32_t turmite_colors[N_STATES] = { + 0xff2222, 0x3366ff, //0x00ff11, 0x00ddee, 0xdd11ee, 0xffff00, +}; + +// grid colors +static uint32_t colors[N_COLORS] = { + 0xffffff, + 0x000000, +}; + +// transition table (not used in showcase mode) +static struct transition trans_table[N_STATES][N_COLORS] = { + { + { 1, R, 0 }, + { 1, N, 1 }, + }, + { + { 1, U, 1 }, + { 0, L, 0 }, + }, +}; + +//==================== +// Sample turmites + +// Langton's ant +// n=1, c=2 +// { +// { 1, R, 0 }, +// { 0, L, 0 }, +// }, + + +// Takes a very long time to do anything, +// forms a highway around 2.6 million ticks +// n=1, c=3 +// { +// { 1, R, 0 }, +// { 2, U, 0 }, +// { 0, L, 0 }, +// }, + +// Pattern with reflection symmetry +// n=1, c=4 +// { +// { 1, R, 0 }, +// { 2, R, 0 }, +// { 3, L, 0 }, +// { 0, L, 0 }, +// }, + +// Expanding square filled with chaos +// n=2, c=2 +// { +// { 1, R, 1 }, +// { 0, L, 0 }, +// }, +// { +// { 1, N, 0 }, +// { 0, N, 0 }, +// }, + +// Spiral +// n=2, c=2 +// { +// { 1, R, 0 }, +// { 0, R, 1 }, +// }, +// { +// { 0, L, 0 }, +// { 1, L, 1 }, +// }, + +// Cross shape +// n=2, c=2 +// { +// { 1, R, 1 }, +// { 1, N, 1 }, +// }, +// { +// { 1, R, 0 }, +// { 0, L, 0 }, +// }, + + +// Langton's ant on a 2-1 diagonal +// n=3, c=2 +// { +// { 0, R, 1 }, +// { 1, N, 2 }, +// }, +// { +// { 1, U, 2 }, +// { 0, N, 2 }, +// }, +// { +// { 0, N, 0 }, +// { 1, U, 2 }, +// }, + diff --git a/src/main.c b/src/main.c new file mode 100644 index 0000000..fd0308d --- /dev/null +++ b/src/main.c @@ -0,0 +1,184 @@ +#include "main.h" +#include "conf.h" +#include "raylib.h" +#include +#include +#include + +#define VIEW_SIZE (SCR_SIZE / CELL_SIZE) +#define GRID_SIZE (2 * VIEW_SIZE) +#define OFFSET ((GRID_SIZE - VIEW_SIZE) / 2) + + +uint8_t grid[GRID_SIZE * GRID_SIZE]; + +uint8_t grid_get(int x, int y) { + return grid[x + y * GRID_SIZE]; +} + +void grid_set(int x, int y, uint8_t val) { + grid[x + y * GRID_SIZE] = val; +} + +void draw_grid(void) { + for (int x = 0; x < VIEW_SIZE; x++) { + for (int y = 0; y < VIEW_SIZE; y++) { + int px = x * CELL_SIZE; + int py = y * CELL_SIZE; + uint8_t colno = grid_get(x + OFFSET, y + OFFSET); + Color col = GetColor(colors[colno] << 8 | 0xff); + DrawRectangle(px, py, CELL_SIZE, CELL_SIZE, col); + } + } +} + +void print_table(void) { + printf("{\n"); + for (int s = 0; s < N_STATES; s++) { + printf("\t{\n"); + for (int c = 0; c < N_COLORS; c++) { + struct transition tr = trans_table[s][c]; + char turn; + switch (tr.turn) { + case N: turn = 'N'; break; + case R: turn = 'R'; break; + case U: turn = 'U'; break; + case L: turn = 'L'; break; + } + printf("\t\t{ %d, %c, %d },\n", tr.write, turn, tr.state); + } + printf("\t},\n"); + } + printf("}\n"); +} + +void rand_table(void) { + for (int s = 0; s < N_STATES; s++) { + for (int c = 0; c < N_COLORS; c++) { + struct transition *tr = &trans_table[s][c]; + tr->write = GetRandomValue(0, N_COLORS-1); + tr->turn = GetRandomValue(0, 3); + tr->state = GetRandomValue(0, N_STATES-1); + } + } + // avoid boring turmites that never write or change state + while (trans_table[0][0].write == 0 && trans_table[0][0].state == 0) { + trans_table[0][0].write = GetRandomValue(0, N_COLORS-1); + trans_table[0][0].state = GetRandomValue(0, N_STATES-1); + } + while (trans_table[0][0].state == 0 && trans_table[0][0].turn == N) { + trans_table[0][0].state = GetRandomValue(0, N_COLORS-1); + trans_table[0][0].turn = GetRandomValue(0, 3); + } +} + + +void update_turmite(struct turmite *t) { + uint8_t read = grid_get(t->x, t->y); + + struct transition tr = trans_table[t->state][read]; + + grid_set(t->x, t->y, tr.write); + t->dir = (t->dir + tr.turn) % 4; + switch (t->dir) { + case DIR_N: t->y -= 1; break; + case DIR_E: t->x += 1; break; + case DIR_S: t->y += 1; break; + case DIR_W: t->x -= 1; break; + } + t->state = tr.state; +} + +void reset_turmite(struct turmite *t) { + memset(grid, 0, sizeof(grid)); + + t->x = OFFSET + VIEW_SIZE/2; + t->y = OFFSET + VIEW_SIZE/2; + t->state = 0; + t->dir = INIT_DIR; +} + +void draw_turmite(struct turmite *t) { + float x = (t->x - OFFSET) * CELL_SIZE + CELL_SIZE*0.5; + float y = (t->y - OFFSET) * CELL_SIZE + CELL_SIZE*0.5; + uint32_t col = (turmite_colors[t->state] << 8) | TURMITE_ALPHA; + float ox = 0, oy = 0; + switch (t->dir) { + case DIR_N: oy = -CELL_SIZE*0.4; break; + case DIR_E: ox = CELL_SIZE*0.4; break; + case DIR_S: oy = CELL_SIZE*0.4; break; + case DIR_W: ox = -CELL_SIZE*0.; break; + } + Vector2 v1 = { x + ox, y + oy }; + Vector2 v2 = { x - ox + oy, y - ox - oy }; + Vector2 v3 = { x - ox - oy, y + ox - oy }; + DrawTriangle(v1, v2, v3, GetColor(col)); +} + +void draw_frame(int tick_count, struct turmite *t) { + BeginDrawing(); + ClearBackground(GetColor(colors[0] << 8 | 0xff)); + + draw_grid(); + draw_turmite(t); + DrawFPS(10, 10); + char counter[16]; + snprintf(counter, 15, "t=%d", tick_count); + DrawText(counter, 10, SCR_SIZE-30, 20, GetColor(colors[1] << 8 | 0xff)); + + EndDrawing(); +} + +int main(void) { + InitWindow(SCR_SIZE, SCR_SIZE, "turmites"); + + SetTargetFPS(TARGET_FPS); + + printf("\n===== turmites =====\n"); + + struct turmite t; + reset_turmite(&t); + int reset_timer = DO_SHOWCASE ? 0 : -1; + int tick_count = 0; + + if (!DO_SHOWCASE) { + print_table(); + } + + while (!WindowShouldClose()) { + draw_frame(tick_count, &t); + + if (reset_timer == 0) { + printf("\n===== reset =====\n"); + reset_turmite(&t); + rand_table(); + print_table(); + tick_count = 0; + reset_timer = -1; + continue; + } else if (reset_timer > 0) { + reset_timer--; + continue; + } else if (reset_timer == -2) { + continue; + } + + for (int i = 0; i < TICKS_PER_FRAME; i++) { + update_turmite(&t); + tick_count++; + int oob = t.x < 0 || t.y < 0 || t.x >= GRID_SIZE || t.y >= GRID_SIZE; + if (DO_SHOWCASE && (oob || tick_count >= SHOWCASE_TIME)) { + reset_timer = FREEZE_FRAMES; + break; + } else if (oob) { + printf("\n===== out of bounds =====\n"); + reset_timer = -2; + break; + } + } + } + + CloseWindow(); + + return 0; +} diff --git a/src/main.h b/src/main.h new file mode 100644 index 0000000..6cd1ed6 --- /dev/null +++ b/src/main.h @@ -0,0 +1,32 @@ +#pragma once + +#include + +enum dir { + DIR_N, DIR_E, DIR_S, DIR_W, +}; + +enum turn { + N = 0, + R = 1, + U = 2, + L = 3, +}; + +enum mode { + ENDLESS, + SHOWCASE, +}; + +struct turmite { + int x; + int y; + uint8_t state; + enum dir dir; +}; + +struct transition { + uint8_t write; + enum turn turn; + uint8_t state; +};