gamestatelogo.hpp

超级玛丽

//-------------------------------------------------------------------------------------
//
// This is part of MarioDemo, a platformer demo for JGE++
// 
// Copyright (C) 2006 James Hui (a.k.a. Dr.Watson)
// 
// This program 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 2 of the License, or (at your option) any
// later version.
// 
// This program 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
// this program; if not, write to the Free Software Foundation, Inc., 59 Temple
// Place, Suite 330, Boston, MA 02111-1307 USA
// 
// Bugs and comments can be forwarded to [e-mail]. 
// 
//-------------------------------------------------------------------------------------

#ifndef _GAME_STATES_LOGO_H_
#define _GAME_STATES_LOGO_H_

#include "GameState.h"

#define SPLASH_DELAY		2000.0f
#define SPLASH_DELAY_2		1000.0f


class MeshEffect;

class GameStateLogo: public GameState
{
private:
	JTexture* mSplashTex;
	JQuad* mSplashQuad;
	
	int mMode;
	int mStage;
	float mAlpha;
	float mTimer;
	float mDelta;

	float mMax;
	float mMaxDelta;

	MeshEffect* mEffect;


public:
	GameStateLogo(GameApp* app): GameState(app) 
	{
		mEffect = NULL;
	}

	virtual ~GameStateLogo() 
	{

	}

	virtual void Create() 
	{
		mSplashTex = mEngine->LoadTexture("Res/Untitled-3.png", true);
		mSplashQuad = new JQuad(mSplashTex, 0.0f, 0.0f, 640.0f, 480.0f);

		mEffect = new MeshEffect(mSplashTex, 0, 0, 640, 480);
		
	}
	
	virtual void Destroy() 
	{
		if (mSplashQuad)
			delete mSplashQuad;

		if (mSplashTex)
			mEngine->FreeTexture(mSplashTex);

		if (mEffect)
			delete mEffect;

	}
	

	virtual void Start()
	{
		mMode = 0;
		mStage = 0;
		mAlpha = 0.0f;
		
		mMax = 16.0f;
		mMaxDelta = 16.0f/SPLASH_DELAY;

		mDelta = 255/SPLASH_DELAY;

		mEffect->SetMax(mMax);
		mEffect->SetAlpha(mAlpha);
		mEffect->SetPosition(0, 0);
		
		mEngine->EnableVSync(true);
	}


	virtual void End()
	{
		mEngine->EnableVSync(false);
	}


	virtual void Update()
	{

		float dt = mEngine->GetDelta();
		if(mEngine->GetButtonState(PSP_CTRL_START))
		{
			mMode = 2;
			return;
		}

		if (mEngine->GetButtonState(PSP_CTRL_CROSS))		// skip everything...
		{
			mMode = 3;
			mApp->SetNextState(GAME_STATE_SPLASH);
			return;
		}

		if (mMode==0)
		{
			mAlpha += mDelta*dt;
			if (mAlpha > 255.0f)
			{
				mAlpha = 255.0f;
				mMode = 1;
				mTimer = 0.0f;
			}

			mMax -= mMaxDelta*dt;
			if (mMax<0.0f)
				mMax = 0.0f;
		}
		else if (mMode==1)
		{
			mTimer += dt;
			if (mTimer > SPLASH_DELAY_2)
				mMode = 2;

			mMax = 0.0f;
		}
		else if (mMode==2)
		{
			mAlpha -= mDelta*dt;
			if (mAlpha < 0.0f)
			{
				mAlpha = 0.0f;
				mStage++;

				mMode = 3;
				mApp->SetNextState(GAME_STATE_SPLASH);
			}

			mMax += mMaxDelta*dt;
			if (mMax>100.0f)
				mMax = 100.0f;
		}
		else
			return;


		mEffect->SetMax(mMax);
		mEffect->SetAlpha(mAlpha);
		mEffect->Update(dt);

	}


	virtual void Render() 
	{
		mEngine->ClearScreen(ARGB(255,255,255,255));

		if (mMode == 3) return;

		mEffect->Render();

	}

};


#endif