83 lines
2.2 KiB
C
83 lines
2.2 KiB
C
/* main.c
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* Created: 2023-08-25
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* Author: Aryadev Chavali
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* Description: Entry point of program
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*/
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#include <malloc.h>
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#include <stdio.h>
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#include <raylib.h>
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struct State
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{
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// Sandpiles
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unsigned char *data;
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size_t dwidth;
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size_t window_len;
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int multiplier;
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};
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typedef struct State state_t;
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void step(state_t *state)
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{
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state->data[((state->dwidth / 2) * state->dwidth) + (state->dwidth / 2)]++;
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for (size_t i = 0; i < state->dwidth; ++i)
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for (size_t j = 0; j < state->dwidth; ++j)
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if (state->data[(i * state->dwidth) + j] >= 4)
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{
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unsigned char *references[] = {
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(j == 0) ? NULL : &state->data[((i)*state->dwidth) + j - 1],
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(i == state->dwidth - 1)
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? NULL
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: &state->data[((i + 1) * state->dwidth) + j],
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(j == state->dwidth - 1)
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? NULL
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: &state->data[(i * state->dwidth) + j + 1],
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(i == 0) ? NULL : &state->data[((i - 1) * state->dwidth) + j]};
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for (size_t k = 0; k < 4; ++k)
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if (references[k])
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*references[k] += 1;
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state->data[(i * state->dwidth) + j] = 0;
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}
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}
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int main(void)
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{
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state_t state = {NULL, 256, 512, 0};
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state.data = calloc(state.dwidth * state.dwidth, sizeof(*state.data));
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state.multiplier = state.window_len / state.dwidth;
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InitWindow(state.window_len, state.window_len, "Abelian sand pile");
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SetTargetFPS(60);
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while (!WindowShouldClose())
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{
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step(&state);
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BeginDrawing();
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ClearBackground(BLACK);
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DrawText("Hello, world!", 100, 100, 25, RAYWHITE);
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for (size_t i = 0; i < state.dwidth; ++i)
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for (size_t j = 0; j < state.dwidth; ++j)
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{
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Color c = {0};
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unsigned char sandpile = state.data[(i * state.dwidth) + j];
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if (sandpile == 0)
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c = BLACK;
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else if (sandpile == 1)
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c = GREEN;
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else if (sandpile == 2)
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c = PURPLE;
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else if (sandpile == 3)
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c = YELLOW;
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DrawRectangle(i * state.multiplier, j * state.multiplier,
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state.multiplier, state.multiplier, c);
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}
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EndDrawing();
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}
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CloseWindow();
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return 0;
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}
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