From 71d15df2dd3e96f6d5730a136ad2a0fc5273e44d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Miloslav=20=C4=8C=C3=AD=C5=BE?= <tastyfish@seznam.cz>
Date: Mon, 10 Sep 2018 19:28:36 +0200
Subject: [PATCH] Add head bob

---
 demo2.cpp   |  2 ++
 demo3.cpp   | 14 +++++---------
 general.hpp | 21 +++++++++++++++++++++
 3 files changed, 28 insertions(+), 9 deletions(-)

diff --git a/demo2.cpp b/demo2.cpp
index 37abbb6..4b8fd56 100644
--- a/demo2.cpp
+++ b/demo2.cpp
@@ -809,7 +809,9 @@ void draw()
   c.maxSteps = 20;
   c.computeTextureCoords = 1;
 
+player.mCamera.height += player.mHeadBob;
   render(player.mCamera,floorHeightAt,0,textureAt,pixelFunc,c);
+player.mCamera.height -= player.mHeadBob;
 
   if (shotFired)
   {
diff --git a/demo3.cpp b/demo3.cpp
index fb4ecca..2c6c775 100644
--- a/demo3.cpp
+++ b/demo3.cpp
@@ -9,6 +9,9 @@
 
 // redefine player's height
 #define CAMERA_COLL_HEIGHT_BELOW ((3 * UNITS_PER_SQUARE) / 2)
+#define FPS 40
+#define HEAD_BOB_HEIGHT 150
+#define HEAD_BOB_STEP 20
 
 #include "general.hpp"
 
@@ -237,16 +240,9 @@ void draw()
   c.maxSteps = 20;
   c.computeTextureCoords = 0;
 
+  player.mCamera.height += player.mHeadBob;
   render(player.mCamera,floorHeightAt,0,colorAt,pixelFunc,c);
-/*
-pokitto.display.setColor(rgbToIndex(7,7,3));
-pokitto.display.setCursor(1,1);
-pokitto.display.print(player.mCamera.position.x);
-pokitto.display.print(" ");
-pokitto.display.print(player.mCamera.position.y);
-pokitto.display.print(" ");
-pokitto.display.print(player.mCamera.direction);
-*/
+  player.mCamera.height -= player.mHeadBob;
 }
 
 int main()
diff --git a/general.hpp b/general.hpp
index 83fa89f..6893a85 100644
--- a/general.hpp
+++ b/general.hpp
@@ -33,6 +33,14 @@ Pokitto::Core pokitto;
 #define PLAYER_JUMP_SPEED 500
 #endif
 
+#ifndef HEAD_BOB_HEIGHT
+#define HEAD_BOB_HEIGHT 100
+#endif
+
+#ifndef HEAD_BOB_STEP
+#define HEAD_BOB_STEP 10
+#endif
+
 #ifndef GRAVITY_ACCELERATION
 #define GRAVITY_ACCELERATION ((3 * UNITS_PER_SQUARE) / 2)
 #endif
@@ -205,6 +213,8 @@ public:
   Camera mCamera;
   Unit mVericalSpeed;
   bool mRunning;
+  Unit mHeadBob;
+  bool mHeadBobUp;
 
   Player()
   {
@@ -217,6 +227,8 @@ public:
     mCamera.shear = 0;
     mVericalSpeed = 0;
     mRunning = false;
+    mHeadBob = 0;
+    mHeadBobUp = true;
   }
 
   void setPosition(Unit x, Unit y)
@@ -250,7 +262,16 @@ public:
 
       moveOffset.x = (moveOffset.x * horizontalStep) / UNITS_PER_SQUARE;
       moveOffset.y = (moveOffset.y * horizontalStep) / UNITS_PER_SQUARE;
+
+      mHeadBob += mHeadBobUp ? HEAD_BOB_STEP : -HEAD_BOB_STEP;
+
+      if (mHeadBob > HEAD_BOB_HEIGHT)
+        mHeadBobUp = false;
+      else if (mHeadBob < -HEAD_BOB_HEIGHT)
+        mHeadBobUp = true; 
     }
+    else
+      mHeadBob /= 2;
  
     if (turnDirection != 0)
     {