add initial tetromino generation and control

1 files changed, 41 insertions, 12 deletions

diff --git a/src/retris.c b/src/retris.c
index 7335b9e..6779ab8 100644
--- a/src/retris.c
+++ b/src/retris.c
@@ -1,5 +1,6 @@
 #include <stdlib.h>
 #include <time.h>
+#include <stdbool.h>
 #include "raylib.h"
 
 /*
@@ -15,6 +16,8 @@
  * and right, due to how often it polls */
 #define FPS 30
 
+#define CYAN CLITERAL(Color){ 0, 255, 255, 255 }
+
 typedef struct Vector2Int {
   int x, y;
 } Vector2Int;
@@ -31,37 +34,63 @@ 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;
+  Tetromino cur_trmno; // trnmo is faster and easier to write than tetromino
+  bool gen_trmno = true;
 
   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))) {
+    if (gen_trmno) {
+      switch (rand() % 1) {
+        case 0:
+          cur_trmno.colour = CYAN;
+          for (i = 0; i < 4; i++) {
+            cur_trmno.pos[i].x = WIDTH / 2;
+            // 3 - i so that tetrominoes are listed from bottom up; if drawn
+            // from top to bottom on line 69, then they will overlap and just
+            // be 1 cube
+            cur_trmno.pos[i].y = 3 - i;
+            grid[cur_trmno.pos[i].x][cur_trmno.pos[i].y] =
+              cur_trmno.colour;
+          }
+      }
+      gen_trmno = false;
+    }
+
+    if (count >= (IsKeyDown(KEY_DOWN) ? FPS/30 : interval)) {
       count = 0;
-      grid[cur_cube.x][cur_cube.y] = WHITE;
-      cur_cube.y++;
-      grid[cur_cube.x][cur_cube.y] = RED;
+      for (i = 0; i < 4; i++) {
+        grid[cur_trmno.pos[i].x][cur_trmno.pos[i].y] = WHITE;
+        cur_trmno.pos[i].y++;
+        grid[cur_trmno.pos[i].x][cur_trmno.pos[i].y] = cur_trmno.colour;
+      }
     }
 
     if (IsKeyDown(KEY_RIGHT)) {
-      grid[cur_cube.x][cur_cube.y] = WHITE;
-      cur_cube.x++;
-      grid[cur_cube.x][cur_cube.y] = RED;
+      for (i = 0; i < 4; i++) {
+        grid[cur_trmno.pos[i].x][cur_trmno.pos[i].y] = WHITE;
+        cur_trmno.pos[i].x++;
+        grid[cur_trmno.pos[i].x][cur_trmno.pos[i].y] = cur_trmno.colour;
+      }
     }
     else if (IsKeyDown(KEY_LEFT)) {
-      grid[cur_cube.x][cur_cube.y] = WHITE;
-      cur_cube.x--;
-      grid[cur_cube.x][cur_cube.y] = RED;
+      for (i = 0; i < 4; i++) {
+        grid[cur_trmno.pos[i].x][cur_trmno.pos[i].y] = WHITE;
+        cur_trmno.pos[i].x--;
+        grid[cur_trmno.pos[i].x][cur_trmno.pos[i].y] = cur_trmno.colour;
+      }
     }
 
+    if (IsKeyDown(KEY_G))
+      gen_trmno = true;
+
     BeginDrawing();
       Draw2DGrid(grid);
     EndDrawing();