From bee57c12a4582d56f2eb18ea632e416cbffe5528 Mon Sep 17 00:00:00 2001
From: not_a_robot <hashimm06@outlook.com>
Date: Sun, 19 Nov 2023 16:18:23 +0000
Subject: initial commit

---
 src/retris.c | 88 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 88 insertions(+)
 create mode 100644 src/retris.c

(limited to 'src/retris.c')

diff --git a/src/retris.c b/src/retris.c
new file mode 100644
index 0000000..7335b9e
--- /dev/null
+++ b/src/retris.c
@@ -0,0 +1,88 @@
+#include <stdlib.h>
+#include <time.h>
+#include "raylib.h"
+
+/*
+ * each cube is 1 unit, so FACT is used as a scale factor for the size of the
+ * screen
+ */
+#define WIDTH 10
+#define HEIGHT 22
+#define VIS_HEIGHT 20
+#define FACT 40
+/* since the game only moves on a block per block basis, no smoothness is
+ * necessary, so the only thing FPS controls is how fast the blocks move left
+ * and right, due to how often it polls */
+#define FPS 30
+
+typedef struct Vector2Int {
+  int x, y;
+} Vector2Int;
+
+typedef struct Tetromino {
+  Color colour;
+  Vector2Int pos[4]; // position of 4 cubes making the tetromino
+} Tetromino;
+
+void Draw2DGrid(Color grid[WIDTH][HEIGHT]);
+
+int
+main(void){
+  int const width = WIDTH * FACT, height = HEIGHT * FACT,
+    vis_height = VIS_HEIGHT * FACT;
+  Color grid[WIDTH][HEIGHT]; // if colour is WHITE, the position is empty
+  Vector2Int cur_cube = {0,0};
+  int interval = FPS, count, i, j;
+
+  srand(time(NULL));
+
+  for (i = 0; i < WIDTH; i++)
+    for (j = 0; j < HEIGHT; j++)
+      grid[i][j] = WHITE;
+  grid[0][0] = RED;
+
+  InitWindow(width, height, "retris");
+  SetTargetFPS(FPS);
+  for (count = 0; !WindowShouldClose(); count++) {
+    if (count == (interval - (IsKeyDown(KEY_DOWN) ? interval/2 : 0))) {
+      count = 0;
+      grid[cur_cube.x][cur_cube.y] = WHITE;
+      cur_cube.y++;
+      grid[cur_cube.x][cur_cube.y] = RED;
+    }
+
+    if (IsKeyDown(KEY_RIGHT)) {
+      grid[cur_cube.x][cur_cube.y] = WHITE;
+      cur_cube.x++;
+      grid[cur_cube.x][cur_cube.y] = RED;
+    }
+    else if (IsKeyDown(KEY_LEFT)) {
+      grid[cur_cube.x][cur_cube.y] = WHITE;
+      cur_cube.x--;
+      grid[cur_cube.x][cur_cube.y] = RED;
+    }
+
+    BeginDrawing();
+      Draw2DGrid(grid);
+    EndDrawing();
+  }
+
+  CloseWindow();
+  return 0;
+}
+
+void
+Draw2DGrid(Color grid[WIDTH][HEIGHT]){
+  int i, j;
+
+  for (i = 0; i < WIDTH; i++) {
+    for (j = 0; j < HEIGHT; j++) {
+      DrawRectangle(i*FACT, j*FACT, FACT, FACT, grid[i][j]);
+    }
+  }
+
+  for (i = 0; i <= WIDTH; i++)
+    DrawLine(i*FACT, 0, i*FACT, HEIGHT*FACT, LIGHTGRAY);
+  for (i = 0; i <= HEIGHT; i++)
+    DrawLine(0, i*FACT, WIDTH*FACT, i*FACT, LIGHTGRAY);
+}
-- 
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