Update events.c

src/events.c

@@ -14,70 +14,83 @@ bool gradient_d		= false;	// gradient direction flag
 
 int handle_events () {
 
-//////////////////////////////// GAME LOOP //////////////////////////
+////////////////////////////// EVENT LOOP //////////////////////////
+
 	while (restart == false) {
 		SDL_PollEvent (&event);
 		switch (event.type) {
 			case SDL_KEYDOWN:
+
+			// gradient colour cycle
 			if(event.key.keysym.sym == SDLK_c
 			&& (event.key.keysym.mod & KMOD_CTRL) != 0 ) {
 				colour = colour + 10;
 				if (colour >= 69) {colour = 0;}
 				backdrop(colour);
 				break;
-			}				// gradient colour cycle
+			}
 
-				if( event.key.keysym.sym == SDLK_x
+			// invert gradient
-				&& (event.key.keysym.mod & KMOD_CTRL) != 0 ) {
+			if( event.key.keysym.sym == SDLK_x
+			&& (event.key.keysym.mod & KMOD_CTRL) != 0 ) {
 				gradient_d = !gradient_d;
 				break;
-			}				// invert gradient
+			}
 
-			 if (event.key.keysym.sym == SDLK_LEFT) {
+			// left arrow
-
+			if (event.key.keysym.sym == SDLK_LEFT) {
-				if (col == 0) {break;}
+				if (col == 0 | grid[0][row + 2][col - 1] != 0) {break;}
-				grid[0][row + 1][col] = 0;
+					for (int i = -1; i < 3; i++) {
-				grid[0][row + 0][col] = 0;
+						grid[0][row + i][col] = 0; // zero out old column
-				grid[0][row + 2][col] = 0;
+					}
-				grid[0][row - 1][col] = 0;
 				col--;
 				disp_column (row, col);
 				break;
-			}				// left arrow
+			}
 
+			// right arrow
  			if (event.key.keysym.sym == SDLK_RIGHT) {
- 				if (col == 7) {break;}
+ 				if (col == 7 | grid[0][row + 2][col + 1] != 0) {break;}
-				grid[0][row + 1][col] = 0;
+ 					for (int i = -1; i < 3; i++) {
-				grid[0][row + 0][col] = 0;
+						grid[0][row + i][col] = 0; // zero out old column
-				grid[0][row + 2][col] = 0;
+					}
-				grid[0][row - 1][col] = 0;
  				col++;
  				disp_column (row, col);
  				break;
- 			}				// right arrow
+ 			}
 
+			// next piece (brick/block) preview
 			if (event.key.keysym.sym == SDLK_n) {
 				next_p = !next_p;
 				break;
-			}				// next piece (brick/block) preview
+			}
 
+			// restart
 			if( event.key.keysym.sym == SDLK_r
 				&& (event.key.keysym.mod & KMOD_CTRL) != 0 ) {
 				restart = true;
 				break;
-			}				// restart
+			}
 
+			// rotate tiles
 			if(event.key.keysym.sym == SDLK_r
 			&& (event.key.keysym.mod & KMOD_SHIFT) != 0 ) {
 				rotate_col();
 				disp_column (row, col);
 				break;
-			}				// rotate tiles
+			}
 
+			// drop/fall block/piece/brick
 			if (event.key.keysym.sym == SDLK_SPACE) {
+			for (int i = -1; i < 3; i++) {
+				grid[0][row + i][col] = 0;  		// zero out old column
+				}
+				row = 18 - (18-colcnt[col]);
+				disp_column (row, col);
 				break;
-			}				// drop/fall block/piece/brick
+			}
 
+			// change tile design/pattern
 			if( event.key.keysym.sym == SDLK_s
 				&& (event.key.keysym.mod & KMOD_CTRL) != 0 ) {
 				tile_shp++;
@@ -85,12 +98,13 @@ int handle_events () {
 					tile_shp = 0;
 				}
 				break;
-			}				// change tile design/pattern
+			}
 
+			// pause
 			if (event.key.keysym.sym == SDLK_p) {
 				pause_f = !pause_f;
 				break;
-			}				// pause
+			}
 		}
 				Ren_game ();
 	}