Add fast forwarding

src/Main.cpp

@@ -1,3 +1,4 @@
+#include <SFML/Window/Keyboard.hpp>
 #define WINDOW_WIDTH 400
 #define WINDOW_HEIGHT 400
 
@@ -82,12 +83,19 @@ int main()
 		sf::Event event;
 		while (window.pollEvent(event))
 		{
-			if (event.type == sf::Event::Closed)
+			switch (event.type) {
+				case sf::Event::Closed:
 					window.close();
+				default:
+					break;
+			}
 		}
 
 		window.clear();
 
+		// Fast forward
+		window.setFramerateLimit(sf::Keyboard::isKeyPressed(sf::Keyboard::Key::Down) ? 16 : 8);
+
 		// Horizontal movement
 		int movement = 0;
 		if (sf::Keyboard::isKeyPressed(sf::Keyboard::Key::Left))
@@ -116,7 +124,7 @@ int main()
 		}
 
 		// Snapping
-		if (sf::Keyboard::isKeyPressed(sf::Keyboard::Key::Space)) {
+		int snap_y = block.position.y;
 		while (true) {
 			for (int y = 0; y < 2; y++) {
 				for (int x = 0; x < 4; x++) {
@@ -124,19 +132,22 @@ int main()
 						continue;
 					}
 					int global_x = x + block.position.x;
-						int global_y = y + block.position.y;
+					int global_y = y + snap_y;
 					if (global_y == GRID_HEIGHT - 1 || grid[global_y + 1][global_x] != nullptr) {
 						goto after_snap_loop;
 					}
 				}
 			}
-				block.position.y++;
+			snap_y++;
-			}
 		}
 		after_snap_loop:
+		if (sf::Keyboard::isKeyPressed(sf::Keyboard::Key::Space)) {
+			block.position.y = snap_y;
+		}
 
 		// Drawing block and land checking
-		shape.setFillColor(block.type->tile_type->color);
+		sf::Color ghost_color = block.type->tile_type->color;
+		ghost_color.a = 64;
 		bool landed = false;
 		for (int y = 0; y < 2; y++) {
 			for (int x = 0; x < 4; x++) {
@@ -145,11 +156,16 @@ int main()
 				}
 				int global_x = x + block.position.x;
 				int global_y = y + block.position.y;
+				int global_snap_y = snap_y + y;
 				if (global_y == GRID_HEIGHT - 1 || grid[global_y + 1][global_x] != nullptr) {
 					landed = true;
 				}
+				shape.setFillColor(block.type->tile_type->color);
 				shape.setPosition(global_x * shape_width, global_y * shape_height);
 				window.draw(shape);
+				shape.setFillColor(ghost_color);
+				shape.setPosition(global_x * shape_width, global_snap_y * shape_height);
+				window.draw(shape);
 			}
 		}