From a673d86621054f18b25add5878efab6fa035e352 Mon Sep 17 00:00:00 2001
From: Oxore <oxore@protonmail.com>
Date: Mon, 9 Jul 2018 03:04:02 +0300
Subject: Introduce hard drop feature

---
 README.md    |  2 +-
 src/engine.c | 19 +++++++++++++++++++
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index d213330..dc4633a 100644
--- a/README.md
+++ b/README.md
@@ -37,7 +37,7 @@ Look at the [repo releases](https://github.com/Oxore/tetris-csfml/releases)! Now
 - [x] Levels speed and scores calibration
 - [x] Scoring system as in Tetris for NES which is described on [this page](https://tetris.wiki/Scoring)
 - [Wall kick](https://tetris.wiki/Wall_kick)
-- Hard drop
+- [x] Hard drop
 - [x] Phantom shape
 - Table of records
 - Settings menu with external `config.yml` file which allows
diff --git a/src/engine.c b/src/engine.c
index 72fdbfc..6abda95 100644
--- a/src/engine.c
+++ b/src/engine.c
@@ -20,6 +20,7 @@
 #define DOWN      (1 << 2)
 #define LEFT      (1 << 3)
 #define RIGHTHOLD (1 << 4)
+#define HARDDROP  (1 << 5)
 #define LEFTHOLD  (1 << 7)
 
 int level_move_latency[] = {
@@ -223,6 +224,14 @@ static void signal_up()
     project_ghost_shape(&fld, 1, 0);
 }
 
+static void signal_harddrop()
+{
+    while (field_move_shape_down(&fld, 1));
+    transition_put_shape();
+    sfClock_restart(game.gameTick);
+    sfClock_restart(game.putTick);
+}
+
 static void signal_down()
 {
     if (field_move_shape_down(&fld, 1)) {
@@ -263,6 +272,16 @@ static void game_keys()
         arrKeys = arrKeys & ~UP;
     }
 
+    /* HARDDROP */
+    if (sfKeyboard_isKeyPressed(sfKeySpace)) {
+        if (!(arrKeys & HARDDROP)) {
+            arrKeys = arrKeys | HARDDROP;
+            signal_harddrop();
+        }
+    } else {
+        arrKeys = arrKeys & ~HARDDROP;
+    }
+
     /* DOWN */
     if (sfKeyboard_isKeyPressed(sfKeyDown)) {
         if (!(arrKeys & DOWN)) {
-- 
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