Add some (badly) generated platforms that will scroll

down whenever the player's top side depasses the middle
of the screen.
WiP.

src/movers/moveroneshot.hpp

@@ -20,7 +20,7 @@
 #ifndef id9CDCF10D483641A2845353C0835F93EC
 #define id9CDCF10D483641A2845353C0835F93EC
 
-//Move a Placeable by issuind an offset.
+//Move a Placeable by issuing an offset.
 //The offset is applied to the current position of the Placeable you are
 //moving.
 //For example issuing 1, then 2 will put your Placeable in position 3,

src/movers/moverrelative.hpp

@@ -22,7 +22,7 @@
 
 //Move a Placeable by issuing an offset relative to a base position.
 //Use this if for example your Placeable is following a mathematical formula or
-//if you're giving a position you want it to be at any specific time.
+//if you're giving a position you want it to be at at any specific time.
 //For example issuing 1, then 2 will put your Placeable in position 2,
 //assuming it started at 0.
 

src/movers/moversine.cpp

@@ -44,7 +44,7 @@ namespace cloonel {
 	void MoverSine::ApplyMotion (float parDelta) {
 		const float pitwo = static_cast<float>(M_PI) * 2.0f;
 		m_alpha += parDelta * 2.6f;
-		if (m_alpha >= pitwo)
+		while (m_alpha >= pitwo)
 			m_alpha -= pitwo;
 	}
 } //namespace cloonel

src/movers/moverworld.cpp

@@ -0,0 +1,39 @@
+/*
+	Copyright 2014 Michele "King_DuckZ" Santullo
+
+	This file is part of CloonelJump.
+
+	CloonelJump is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	CloonelJump is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with CloonelJump.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "moverworld.hpp"
+#include <algorithm>
+
+namespace cloonel {
+	MoverWorld::MoverWorld (float parMidPoint) :
+		Placeable(float2(0.0f)),
+		m_midPoint(parMidPoint),
+		m_offs(0.0f)
+	{
+	}
+
+	float2 MoverWorld::GetOffset() const {
+		return float2(0.0f, -m_offs);
+	}
+
+	void MoverWorld::ApplyMotion (float) {
+		const auto vertPos = this->GetPos().y();
+		m_offs = std::max(0.0f, vertPos - m_midPoint);
+	}
+} //namespace cloonel

src/movers/moverworld.hpp

@@ -0,0 +1,41 @@
+/*
+	Copyright 2014 Michele "King_DuckZ" Santullo
+
+	This file is part of CloonelJump.
+
+	CloonelJump is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	CloonelJump is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with CloonelJump.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef id47E717F84F3647A69E14C3B695B38F7B
+#define id47E717F84F3647A69E14C3B695B38F7B
+
+#include "moveroneshot.hpp"
+#include "placeable.hpp"
+
+namespace cloonel {
+	class MoverWorld : public MoverOneShot, public Placeable {
+	public:
+		explicit MoverWorld ( float parMidPoint );
+		virtual ~MoverWorld ( void ) noexcept = default;
+
+	private:
+		virtual float2 GetOffset ( void ) const;
+		virtual void ApplyMotion ( float parDelta );
+
+		const float m_midPoint;
+		float m_offs;
+	};
+} //namespace cloonel
+
+#endif