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TetroGL: An OpenGL Game Tutorial in C++ for Win32 platforms - Part 3

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7 Nov 2008CPOL20 min read 182.1K   12.5K   92  
Learn how to draw text and handle the states of your game.
 
#include "Tetrad_T.h"
#include "BlocksMatrix.h"

CTetrad_T::CTetrad_T(CBlocksMatrix* pParent) : CTetrad(pParent,bcPurple)
{
}

CTetrad_T::~CTetrad_T()
{
}

bool CTetrad_T::Rotate()
{
	bool bSuccess = false;
	switch (m_Orientation)
	{
	case Rotation0:
		if (m_pParentMatrix->IsCellFree(m_iXPos,m_iYPos-1))
		{
			m_Orientation = Rotation90;
			bSuccess = true;
		}
		break;

	case Rotation90:
		if (m_pParentMatrix->IsCellFree(m_iXPos+1,m_iYPos))
		{
			m_Orientation = Rotation180;
			bSuccess = true;
		}
		break;

	case Rotation180:
		if (m_pParentMatrix->IsCellFree(m_iXPos,m_iYPos+1))
		{
			m_Orientation = Rotation270;
			bSuccess = true;
		}
		break;

	case Rotation270:
		if (m_pParentMatrix->IsCellFree(m_iXPos-1,m_iYPos))
		{
			m_Orientation = Rotation0;
			bSuccess = true;
		}
		break;
	}
	return bSuccess;
}

bool CTetrad_T::MoveLeft()
{
	bool bSuccess = false;
	switch (m_Orientation)
	{
	case Rotation0:
		if (m_pParentMatrix->IsCellFree(m_iXPos-2,m_iYPos) && 
			m_pParentMatrix->IsCellFree(m_iXPos-1,m_iYPos+1))
		{
			m_iXPos--;
			bSuccess = true;
		}
		break;

	case Rotation90:
		if (m_pParentMatrix->IsCellFree(m_iXPos-1,m_iYPos-1) &&
			m_pParentMatrix->IsCellFree(m_iXPos-2,m_iYPos) && 
			m_pParentMatrix->IsCellFree(m_iXPos-1,m_iYPos+1))
		{
			m_iXPos--;
			bSuccess = true;
		}
		break;

	case Rotation180:
		if (m_pParentMatrix->IsCellFree(m_iXPos-2,m_iYPos) && 
			m_pParentMatrix->IsCellFree(m_iXPos-1,m_iYPos-1))
		{
			m_iXPos--;
			bSuccess = true;
		}
		break;

	case Rotation270:
		if (m_pParentMatrix->IsCellFree(m_iXPos-1,m_iYPos-1) &&
			m_pParentMatrix->IsCellFree(m_iXPos-1,m_iYPos) && 
			m_pParentMatrix->IsCellFree(m_iXPos-1,m_iYPos+1))
		{
			m_iXPos--;
			bSuccess = true;
		}
		break;
	}
	return bSuccess;
}

bool CTetrad_T::MoveRight()
{
	bool bSuccess = false;
	switch (m_Orientation)
	{
	case Rotation0:
		if (m_pParentMatrix->IsCellFree(m_iXPos+2,m_iYPos) && 
			m_pParentMatrix->IsCellFree(m_iXPos+1,m_iYPos+1))
		{
			m_iXPos++;
			bSuccess = true;
		}
		break;

	case Rotation90:
		if (m_pParentMatrix->IsCellFree(m_iXPos+1,m_iYPos-1) &&
			m_pParentMatrix->IsCellFree(m_iXPos+1,m_iYPos  ) && 
			m_pParentMatrix->IsCellFree(m_iXPos+1,m_iYPos+1))
		{
			m_iXPos++;
			bSuccess = true;
		}
		break;

	case Rotation180:
		if (m_pParentMatrix->IsCellFree(m_iXPos+2,m_iYPos) && 
			m_pParentMatrix->IsCellFree(m_iXPos+1,m_iYPos-1))
		{
			m_iXPos++;
			bSuccess = true;
		}
		break;

	case Rotation270:
		if (m_pParentMatrix->IsCellFree(m_iXPos+1,m_iYPos-1) &&
			m_pParentMatrix->IsCellFree(m_iXPos+2,m_iYPos) && 
			m_pParentMatrix->IsCellFree(m_iXPos+1,m_iYPos+1))
		{
			m_iXPos++;
			bSuccess = true;
		}
		break;
	}
	return bSuccess;
}

bool CTetrad_T::MoveDown()
{
	bool bSuccess = false;
	switch (m_Orientation)
	{
	case Rotation0:
		if (m_pParentMatrix->IsCellFree(m_iXPos-1,m_iYPos+1) &&
			m_pParentMatrix->IsCellFree(m_iXPos  ,m_iYPos+2) &&
			m_pParentMatrix->IsCellFree(m_iXPos+1,m_iYPos+1) )
		{
			m_iYPos++;
			bSuccess = true;
		}
		break;

	case Rotation90:
		if (m_pParentMatrix->IsCellFree(m_iXPos-1,m_iYPos+1) && 
			m_pParentMatrix->IsCellFree(m_iXPos  ,m_iYPos+2))
		{
			m_iYPos++;
			bSuccess = true;
		}
		break;

	case Rotation180:
		if (m_pParentMatrix->IsCellFree(m_iXPos-1,m_iYPos+1) &&
			m_pParentMatrix->IsCellFree(m_iXPos  ,m_iYPos+1) &&
			m_pParentMatrix->IsCellFree(m_iXPos+1,m_iYPos+1) )
		{
			m_iYPos++;
			bSuccess = true;
		}
		break;

	case Rotation270:
		if (m_pParentMatrix->IsCellFree(m_iXPos  ,m_iYPos+2) && 
			m_pParentMatrix->IsCellFree(m_iXPos+1,m_iYPos+1))
		{
			m_iYPos++;
			bSuccess = true;
		}
		break;
	}
	return bSuccess;
}

void CTetrad_T::Draw()
{
	int screenX=0, screenY=0; 

	switch (m_Orientation)
	{
	case Rotation0:
		m_pParentMatrix->GetScreenPosFromCell(m_iXPos-1,m_iYPos,screenX,screenY);
		m_pBlockImg->BlitImage(screenX,screenY);
		m_pParentMatrix->GetScreenPosFromCell(m_iXPos  ,m_iYPos,screenX,screenY);
		m_pBlockImg->BlitImage(screenX,screenY);
		m_pParentMatrix->GetScreenPosFromCell(m_iXPos  ,m_iYPos+1,screenX,screenY);
		m_pBlockImg->BlitImage(screenX,screenY);
		m_pParentMatrix->GetScreenPosFromCell(m_iXPos+1,m_iYPos  ,screenX,screenY);
		m_pBlockImg->BlitImage(screenX,screenY);
		break;

	case Rotation90:
		m_pParentMatrix->GetScreenPosFromCell(m_iXPos-1,m_iYPos,screenX,screenY);
		m_pBlockImg->BlitImage(screenX,screenY);
		m_pParentMatrix->GetScreenPosFromCell(m_iXPos  ,m_iYPos-1,screenX,screenY);
		m_pBlockImg->BlitImage(screenX,screenY);
		m_pParentMatrix->GetScreenPosFromCell(m_iXPos  ,m_iYPos  ,screenX,screenY);
		m_pBlockImg->BlitImage(screenX,screenY);
		m_pParentMatrix->GetScreenPosFromCell(m_iXPos  ,m_iYPos+1,screenX,screenY);
		m_pBlockImg->BlitImage(screenX,screenY);
		break;

	case Rotation180:
		m_pParentMatrix->GetScreenPosFromCell(m_iXPos-1,m_iYPos  ,screenX,screenY);
		m_pBlockImg->BlitImage(screenX,screenY);
		m_pParentMatrix->GetScreenPosFromCell(m_iXPos  ,m_iYPos-1,screenX,screenY);
		m_pBlockImg->BlitImage(screenX,screenY);
		m_pParentMatrix->GetScreenPosFromCell(m_iXPos  ,m_iYPos  ,screenX,screenY);
		m_pBlockImg->BlitImage(screenX,screenY);
		m_pParentMatrix->GetScreenPosFromCell(m_iXPos+1,m_iYPos  ,screenX,screenY);
		m_pBlockImg->BlitImage(screenX,screenY);
		break;

	case Rotation270:
		m_pParentMatrix->GetScreenPosFromCell(m_iXPos  ,m_iYPos-1,screenX,screenY);
		m_pBlockImg->BlitImage(screenX,screenY);
		m_pParentMatrix->GetScreenPosFromCell(m_iXPos  ,m_iYPos  ,screenX,screenY);
		m_pBlockImg->BlitImage(screenX,screenY);
		m_pParentMatrix->GetScreenPosFromCell(m_iXPos  ,m_iYPos+1,screenX,screenY);
		m_pBlockImg->BlitImage(screenX,screenY);
		m_pParentMatrix->GetScreenPosFromCell(m_iXPos+1,m_iYPos  ,screenX,screenY);
		m_pBlockImg->BlitImage(screenX,screenY);
		break;
	}
}

void CTetrad_T::DrawOnScreen(const TRectanglei& rect)
{
	int XPos = (rect.GetWidth() - 3*BLOCK_WIDTH)/2 + rect.m_Left;
	int YPos = (rect.GetHeight() - 2*BLOCK_HEIGHT)/2 + rect.m_Top;
	m_pBlockImg->BlitImage(XPos,YPos);
	m_pBlockImg->BlitImage(XPos+BLOCK_WIDTH,YPos);
	m_pBlockImg->BlitImage(XPos+BLOCK_WIDTH,YPos+BLOCK_HEIGHT);
	m_pBlockImg->BlitImage(XPos+2*BLOCK_WIDTH,YPos);
}

void CTetrad_T::FillMatrix()
{
	switch (m_Orientation)
	{
	case Rotation0:
		m_pParentMatrix->FillCell(m_iXPos-1,m_iYPos,m_BlockColor);
		m_pParentMatrix->FillCell(m_iXPos  ,m_iYPos,m_BlockColor);
		m_pParentMatrix->FillCell(m_iXPos  ,m_iYPos+1,m_BlockColor);
		m_pParentMatrix->FillCell(m_iXPos+1,m_iYPos  ,m_BlockColor);
		break;

	case Rotation90:
		m_pParentMatrix->FillCell(m_iXPos-1,m_iYPos,m_BlockColor);
		m_pParentMatrix->FillCell(m_iXPos  ,m_iYPos-1,m_BlockColor);
		m_pParentMatrix->FillCell(m_iXPos  ,m_iYPos  ,m_BlockColor);
		m_pParentMatrix->FillCell(m_iXPos  ,m_iYPos+1,m_BlockColor);
		break;

	case Rotation180:
		m_pParentMatrix->FillCell(m_iXPos-1,m_iYPos  ,m_BlockColor);
		m_pParentMatrix->FillCell(m_iXPos  ,m_iYPos-1,m_BlockColor);
		m_pParentMatrix->FillCell(m_iXPos  ,m_iYPos  ,m_BlockColor);
		m_pParentMatrix->FillCell(m_iXPos+1,m_iYPos  ,m_BlockColor);
		break;

	case Rotation270:
		m_pParentMatrix->FillCell(m_iXPos  ,m_iYPos-1,m_BlockColor);
		m_pParentMatrix->FillCell(m_iXPos  ,m_iYPos  ,m_BlockColor);
		m_pParentMatrix->FillCell(m_iXPos  ,m_iYPos+1,m_BlockColor);
		m_pParentMatrix->FillCell(m_iXPos+1,m_iYPos  ,m_BlockColor);
		break;
	}
}

bool CTetrad_T::IsValid()
{
	bool bValid = false;
	if (m_pParentMatrix->IsCellFree(m_iXPos-1,m_iYPos) &&
		m_pParentMatrix->IsCellFree(m_iXPos  ,m_iYPos) &&
		m_pParentMatrix->IsCellFree(m_iXPos  ,m_iYPos+1) &&
		m_pParentMatrix->IsCellFree(m_iXPos+1,m_iYPos) )
	{
		bValid = true;
	}

	return bValid;
}

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License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


Written By
Cedric Moonen
Engineer
Belgium Belgium
I am a 29 years old guy and I live with my girlfriend in Hoegaarden, little city from Belgium well known for its white beer Smile | :) .
I studied as an industrial engineer in electronics but I oriented myself more towards software development when I started to work.
Currently I am working in a research centre in mechatronica. I mainly develop in C++ but I also do a bit of Java.
When I have so spare time, I like to read (mainly fantasy) and play electric guitar.

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Posted 7 Nov 2008

Article Copyright 2008 by Cedric Moonen
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