axmol/cocos2dx/effects/CCGrid.cpp

/****************************************************************************
Copyright (c) 2010-2011 cocos2d-x.org
Copyright (c) 2009      On-Core

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#include "ccMacros.h"
#include "effects/CCGrid.h"
#include "CCDirector.h"
#include "effects/CCGrabber.h"
#include "support/ccUtils.h"

#include "CCGL.h"
#include "CCPointExtension.h"

namespace cocos2d
{
	// implementation of CCGridBase

	CCGridBase* CCGridBase::gridWithSize(const ccGridSize& gridSize)
	{
        CCGridBase *pGridBase = new CCGridBase();

		if (pGridBase)
		{
            if (pGridBase->initWithSize(gridSize))
			{
				pGridBase->autorelease();
			}
			else
			{
				CC_SAFE_RELEASE_NULL(pGridBase);
			}
		}

		return pGridBase;
	}

	CCGridBase* CCGridBase::gridWithSize(const ccGridSize& gridSize, CCTexture2D *texture, bool flipped)
	{
		CCGridBase *pGridBase = new CCGridBase();

		if (pGridBase)
		{
			if (pGridBase->initWithSize(gridSize, texture, flipped))
			{
				pGridBase->autorelease();
			}
			else
			{
				CC_SAFE_RELEASE_NULL(pGridBase);
			}
		}

		return pGridBase;
	}

	bool CCGridBase::initWithSize(const ccGridSize& gridSize, CCTexture2D *pTexture, bool bFlipped)
	{
		bool bRet = true;

		m_bActive = false;
		m_nReuseGrid = 0;
		m_sGridSize = gridSize;

		m_pTexture = pTexture;
		CC_SAFE_RETAIN(m_pTexture);
		m_bIsTextureFlipped = bFlipped;

		const CCSize& texSize = m_pTexture->getContentSizeInPixels();
		m_obStep.x = texSize.width / m_sGridSize.x;
		m_obStep.y = texSize.height / m_sGridSize.y;

		m_pGrabber = new CCGrabber();
		if (m_pGrabber)
		{
			m_pGrabber->grab(m_pTexture);
		}
		else
		{
            bRet = false;
		}
		

		calculateVertexPoints();

		return bRet;
	}

	bool CCGridBase::initWithSize(const ccGridSize& gridSize)
	{
    	CCDirector *pDirector = CCDirector::sharedDirector();
		CCSize s = pDirector->getWinSizeInPixels();
		
		unsigned long POTWide = ccNextPOT((unsigned int)s.width);
		unsigned long POTHigh = ccNextPOT((unsigned int)s.height);

		// we only use rgba8888
		CCTexture2DPixelFormat format = kCCTexture2DPixelFormat_RGBA8888;

		void *data = calloc((int)(POTWide * POTHigh * 4), 1);
		if (! data)
		{
			CCLOG("cocos2d: CCGrid: not enough memory.");
			this->release();
			return false;
		}

		CCTexture2D *pTexture = new CCTexture2D();
		pTexture->initWithData(data, format, POTWide, POTHigh, s);

		free(data);

		if (! pTexture)
		{
			CCLOG("cocos2d: CCGrid: error creating texture");
			delete this;
			return false;
		}

		initWithSize(gridSize, pTexture, false);

		pTexture->release();

		return true;
	}

	CCGridBase::~CCGridBase(void)
	{
		CCLOGINFO("cocos2d: deallocing %p", this);

		setActive(false);
		CC_SAFE_RELEASE(m_pTexture);
		CC_SAFE_RELEASE(m_pGrabber);
	}

	// properties
	void CCGridBase::setActive(bool bActive)
	{
		m_bActive = bActive;
		if (! bActive)
		{
			CCDirector *pDirector = CCDirector::sharedDirector();
			ccDirectorProjection proj = pDirector->getProjection();
			pDirector->setProjection(proj);
		}
	}

	void CCGridBase::setIsTextureFlipped(bool bFlipped)
	{
		if (m_bIsTextureFlipped != bFlipped)
		{
			m_bIsTextureFlipped = bFlipped;
			calculateVertexPoints();
		}
	}

	// This routine can be merged with Director
	void CCGridBase::applyLandscape(void)
	{
		CCDirector *pDirector = CCDirector::sharedDirector();

		CCSize winSize = pDirector->getDisplaySizeInPixels();
		float w = winSize.width / 2;
		float h = winSize.height / 2;

		ccDeviceOrientation orientation = pDirector->getDeviceOrientation();

		switch (orientation)
		{
		case CCDeviceOrientationLandscapeLeft:
 			glTranslatef(w,h,0);
 			glRotatef(-90,0,0,1);
 			glTranslatef(-h,-w,0);
            break;
		case CCDeviceOrientationLandscapeRight:
			glTranslatef(w,h,0);
			glRotatef(90,0,0,1);
			glTranslatef(-h,-w,0);
			break;
		case CCDeviceOrientationPortraitUpsideDown:
			glTranslatef(w,h,0);
			glRotatef(180,0,0,1);
			glTranslatef(-w,-h,0);
			break;
		default:
			break;
		}
	}

	void CCGridBase::set2DProjection()
	{
		CCSize winSize = CCDirector::sharedDirector()->getWinSizeInPixels();

		glLoadIdentity();

        // set view port for user FBO, fixed bug #543 #544
		glViewport((GLsizei)0, (GLsizei)0, (GLsizei)winSize.width, (GLsizei)winSize.height);
		glMatrixMode(GL_PROJECTION);
		glLoadIdentity();
		ccglOrtho(0, winSize.width, 0, winSize.height, -1024, 1024);
		glMatrixMode(GL_MODELVIEW);
	}

	// This routine can be merged with Director
	void CCGridBase::set3DProjection()
	{
		CCSize	winSize = CCDirector::sharedDirector()->getDisplaySizeInPixels();

        // set view port for user FBO, fixed bug #543 #544
		glViewport(0, 0, (GLsizei)winSize.width, (GLsizei)winSize.height);
		glMatrixMode(GL_PROJECTION);
		glLoadIdentity();
		gluPerspective(60, (GLfloat)winSize.width/winSize.height, 0.5f, 1500.0f);

		glMatrixMode(GL_MODELVIEW);	
		glLoadIdentity();
		gluLookAt( winSize.width/2, winSize.height/2, CCDirector::sharedDirector()->getZEye(),
			winSize.width/2, winSize.height/2, 0,
			0.0f, 1.0f, 0.0f
			);
	}

	void CCGridBase::beforeDraw(void)
	{
		set2DProjection();
		m_pGrabber->beforeRender(m_pTexture);
	}

	void CCGridBase::afterDraw(cocos2d::CCNode *pTarget)
	{
		m_pGrabber->afterRender(m_pTexture);

		set3DProjection();
		applyLandscape();

		if (pTarget->getCamera()->getDirty())
		{
			const CCPoint& offset = pTarget->getAnchorPointInPixels();

			//
			// XXX: Camera should be applied in the AnchorPoint
			//
			ccglTranslate(offset.x, offset.y, 0);
			pTarget->getCamera()->locate();
			ccglTranslate(-offset.x, -offset.y, 0);
		}

		glBindTexture(GL_TEXTURE_2D, m_pTexture->getName());

        // restore projection for default FBO .fixed bug #543 #544
        CCDirector::sharedDirector()->setProjection(CCDirector::sharedDirector()->getProjection());
        CCDirector::sharedDirector()->applyOrientation();
		blit();
	}

	void CCGridBase::blit(void)
	{
		assert(0);
	}

	void CCGridBase::reuse(void)
	{
		assert(0);
	}

	void CCGridBase::calculateVertexPoints(void)
	{
		assert(0);
	}

	// implementation of CCGrid3D

	CCGrid3D* CCGrid3D::gridWithSize(const ccGridSize& gridSize, CCTexture2D *pTexture, bool bFlipped)
	{
		CCGrid3D *pRet= new CCGrid3D();

		if (pRet)
		{
			if (pRet->initWithSize(gridSize, pTexture, bFlipped))
			{
			    pRet->autorelease();
			}
			else
			{
				delete pRet;
				pRet = NULL;
			}
		}

		return pRet;
	}

	CCGrid3D* CCGrid3D::gridWithSize(const ccGridSize& gridSize)
	{
		CCGrid3D *pRet= new CCGrid3D();

		if (pRet)
		{
			if (pRet->initWithSize(gridSize))
			{
			    pRet->autorelease();
			}
			else
			{
				delete pRet;
				pRet = NULL;
			}
		}

		return pRet;
	}

	CCGrid3D::~CCGrid3D(void)
	{
		CC_SAFE_FREE(m_pTexCoordinates);
        CC_SAFE_FREE(m_pVertices);
		CC_SAFE_FREE(m_pIndices);
		CC_SAFE_FREE(m_pOriginalVertices);
	}

	void CCGrid3D::blit(void)
	{
		int n = m_sGridSize.x * m_sGridSize.y;

		// Default GL states: GL_TEXTURE_2D, GL_VERTEX_ARRAY, GL_COLOR_ARRAY, GL_TEXTURE_COORD_ARRAY
		// Needed states: GL_TEXTURE_2D, GL_VERTEX_ARRAY, GL_TEXTURE_COORD_ARRAY
		// Unneeded states: GL_COLOR_ARRAY
		glDisableClientState(GL_COLOR_ARRAY);

		glVertexPointer(3, GL_FLOAT, 0, m_pVertices);
		glTexCoordPointer(2, GL_FLOAT, 0, m_pTexCoordinates);
		glDrawElements(GL_TRIANGLES, (GLsizei)n * 6, GL_UNSIGNED_SHORT, m_pIndices);

		// restore GL default state
		glEnableClientState(GL_COLOR_ARRAY);
	}

	void CCGrid3D::calculateVertexPoints(void)
	{
		float width = (float)m_pTexture->getPixelsWide();
		float height = (float)m_pTexture->getPixelsHigh();
		float imageH = m_pTexture->getContentSizeInPixels().height;

		int x, y, i;

		m_pVertices = malloc((m_sGridSize.x+1) * (m_sGridSize.y+1) * sizeof(ccVertex3F));
		m_pOriginalVertices = malloc((m_sGridSize.x+1) * (m_sGridSize.y+1) * sizeof(ccVertex3F));
		m_pTexCoordinates = malloc((m_sGridSize.x+1) * (m_sGridSize.y+1) * sizeof(CCPoint));
		m_pIndices = (GLushort*)malloc(m_sGridSize.x * m_sGridSize.y * sizeof(GLushort) * 6);

		float *vertArray = (float*)m_pVertices;
		float *texArray = (float*)m_pTexCoordinates;
		GLushort *idxArray = m_pIndices;

		for (x = 0; x < m_sGridSize.x; ++x)
		{
			for (y = 0; y < m_sGridSize.y; ++y)
			{
				int idx = (y * m_sGridSize.x) + x;

				float x1 = x * m_obStep.x;
				float x2 = x1 + m_obStep.x;
				float y1 = y * m_obStep.y;
				float y2= y1 + m_obStep.y;

				GLushort a = (GLushort)(x * (m_sGridSize.y + 1) + y);
				GLushort b = (GLushort)((x + 1) * (m_sGridSize.y + 1) + y);
				GLushort c = (GLushort)((x + 1) * (m_sGridSize.y + 1) + (y + 1));
				GLushort d = (GLushort)(x * (m_sGridSize.y + 1) + (y + 1));

				GLushort tempidx[6] = {a, b, d, b, c, d};

				memcpy(&idxArray[6*idx], tempidx, 6*sizeof(GLushort));

				int l1[4] = {a*3, b*3, c*3, d*3};
				ccVertex3F e = {x1, y1, 0};
				ccVertex3F f = {x2, y1, 0};
				ccVertex3F g = {x2, y2, 0};
				ccVertex3F h = {x1, y2, 0};

				ccVertex3F l2[4] = {e, f, g, h};

				int tex1[4] = {a*2, b*2, c*2, d*2};
				CCPoint tex2[4] = {ccp(x1, y1), ccp(x2, y1), ccp(x2, y2), ccp(x1, y2)};

				for (i = 0; i < 4; ++i)
				{
					vertArray[l1[i]] = l2[i].x;
					vertArray[l1[i] + 1] = l2[i].y;
					vertArray[l1[i] + 2] = l2[i].z;

					texArray[tex1[i]] = tex2[i].x / width;
					if (m_bIsTextureFlipped)
					{
						texArray[tex1[i] + 1] = (imageH - tex2[i].y) / height;
					}
					else
					{
						texArray[tex1[i] + 1] = tex2[i].y / height;
					}
				}
			}
		}

		memcpy(m_pOriginalVertices, m_pVertices, (m_sGridSize.x+1) * (m_sGridSize.y+1) * sizeof(ccVertex3F));
	}

	ccVertex3F CCGrid3D::vertex(const ccGridSize& pos)
	{
		int index = (pos.x * (m_sGridSize.y+1) + pos.y) * 3;
		float *vertArray = (float*)m_pVertices;

		ccVertex3F vert = {vertArray[index], vertArray[index+1], vertArray[index+2]};

		return vert;
	}

	ccVertex3F CCGrid3D::originalVertex(const ccGridSize& pos)
	{
		int index = (pos.x * (m_sGridSize.y+1) + pos.y) * 3;
		float *vertArray = (float*)m_pOriginalVertices;

		ccVertex3F vert = {vertArray[index], vertArray[index+1], vertArray[index+2]};

		return vert;
	}

	void CCGrid3D::setVertex(const ccGridSize& pos, const ccVertex3F& vertex)
	{
		int index = (pos.x * (m_sGridSize.y + 1) + pos.y) * 3;
		float *vertArray = (float*)m_pVertices;
		vertArray[index] = vertex.x;
		vertArray[index+1] = vertex.y;
		vertArray[index+2] = vertex.z;
	}

	void CCGrid3D::reuse(void)
	{
		if (m_nReuseGrid > 0)
		{
			memcpy(m_pOriginalVertices, m_pVertices, (m_sGridSize.x+1) * (m_sGridSize.y+1) * sizeof(ccVertex3F));
			--m_nReuseGrid;
		}
	}

	// implementation of CCTiledGrid3D

	CCTiledGrid3D::~CCTiledGrid3D(void)
	{
		CC_SAFE_FREE(m_pTexCoordinates);
		CC_SAFE_FREE(m_pVertices);
		CC_SAFE_FREE(m_pOriginalVertices);
		CC_SAFE_FREE(m_pIndices);
	}

	CCTiledGrid3D* CCTiledGrid3D::gridWithSize(const ccGridSize& gridSize, CCTexture2D *pTexture, bool bFlipped)
	{
		CCTiledGrid3D *pRet= new CCTiledGrid3D();

		if (pRet)
		{
			if (pRet->initWithSize(gridSize, pTexture, bFlipped))
			{
			    pRet->autorelease();
			}
			else
			{
				delete pRet;
				pRet = NULL;
			}
		}

		return pRet;
	}

	CCTiledGrid3D* CCTiledGrid3D::gridWithSize(const ccGridSize& gridSize)
	{
		CCTiledGrid3D *pRet= new CCTiledGrid3D();

		if (pRet)
		{
			if (pRet->initWithSize(gridSize))
			{
			    pRet->autorelease();
			}
			else
			{
				delete pRet;
				pRet = NULL;
			}
		}

		return pRet;
	}

	void CCTiledGrid3D::blit(void)
	{
		int n = m_sGridSize.x * m_sGridSize.y;

		// Default GL states: GL_TEXTURE_2D, GL_VERTEX_ARRAY, GL_COLOR_ARRAY, GL_TEXTURE_COORD_ARRAY
		// Needed states: GL_TEXTURE_2D, GL_VERTEX_ARRAY, GL_TEXTURE_COORD_ARRAY
		// Unneeded states: GL_COLOR_ARRAY
		glDisableClientState(GL_COLOR_ARRAY);

		glVertexPointer(3, GL_FLOAT, 0, m_pVertices);
		glTexCoordPointer(2, GL_FLOAT, 0, m_pTexCoordinates);
		glDrawElements(GL_TRIANGLES, (GLsizei)n*6, GL_UNSIGNED_SHORT, m_pIndices);

		// restore default GL state
		glEnableClientState(GL_COLOR_ARRAY);
	}

	void CCTiledGrid3D::calculateVertexPoints(void)
	{
 		float width = (float)m_pTexture->getPixelsWide();
 		float height = (float)m_pTexture->getPixelsHigh();
		float imageH = m_pTexture->getContentSizeInPixels().height;
		
		int numQuads = m_sGridSize.x * m_sGridSize.y;
		
		m_pVertices = malloc(numQuads * 12 * sizeof(GLfloat));
		m_pOriginalVertices = malloc(numQuads * 12 * sizeof(GLfloat));
		m_pTexCoordinates = malloc(numQuads * 8 * sizeof(GLfloat));
		m_pIndices = (GLushort *)malloc(numQuads * 6 * sizeof(GLushort));
		
		float *vertArray = (float*)m_pVertices;
		float *texArray = (float*)m_pTexCoordinates;
		GLushort *idxArray = m_pIndices;
		
		int x, y;
		
		for( x = 0; x < m_sGridSize.x; x++ )
		{
			for( y = 0; y < m_sGridSize.y; y++ )
			{
				float x1 = x * m_obStep.x;
				float x2 = x1 + m_obStep.x;
				float y1 = y * m_obStep.y;
				float y2 = y1 + m_obStep.y;
				
				*vertArray++ = x1;
				*vertArray++ = y1;
				*vertArray++ = 0;
				*vertArray++ = x2;
				*vertArray++ = y1;
				*vertArray++ = 0;
				*vertArray++ = x1;
				*vertArray++ = y2;
				*vertArray++ = 0;
				*vertArray++ = x2;
				*vertArray++ = y2;
				*vertArray++ = 0;
				
				float newY1 = y1;
				float newY2 = y2;
				
				if (m_bIsTextureFlipped) 
				{
					newY1 = imageH - y1;
					newY2 = imageH - y2;
				}

				*texArray++ = x1 / width;
				*texArray++ = newY1 / height;
				*texArray++ = x2 / width;
				*texArray++ = newY1 / height;
				*texArray++ = x1 / width;
				*texArray++ = newY2 / height;
				*texArray++ = x2 / width;
				*texArray++ = newY2 / height;
			}
		}
		
		for (x = 0; x < numQuads; x++)
		{
			idxArray[x*6+0] = (GLushort)(x * 4 + 0);
			idxArray[x*6+1] = (GLushort)(x * 4 + 1);
			idxArray[x*6+2] = (GLushort)(x * 4 + 2);
			
			idxArray[x*6+3] = (GLushort)(x * 4 + 1);
			idxArray[x*6+4] = (GLushort)(x * 4 + 2);
			idxArray[x*6+5] = (GLushort)(x * 4 + 3);
		}
		
		memcpy(m_pOriginalVertices, m_pVertices, numQuads * 12 * sizeof(GLfloat));
	}

	void CCTiledGrid3D::setTile(const ccGridSize& pos, const ccQuad3& coords)
	{
		int idx = (m_sGridSize.y * pos.x + pos.y) * 4 * 3;
		float *vertArray = (float*)m_pVertices;
		memcpy(&vertArray[idx], &coords, sizeof(ccQuad3));
	}

	ccQuad3 CCTiledGrid3D::originalTile(const ccGridSize& pos)
	{
		int idx = (m_sGridSize.y * pos.x + pos.y) * 4 * 3;
		float *vertArray = (float*)m_pOriginalVertices;

		ccQuad3 ret;
		memcpy(&ret, &vertArray[idx], sizeof(ccQuad3));

		return ret;
	}

	ccQuad3 CCTiledGrid3D::tile(const ccGridSize& pos)
	{
		int idx = (m_sGridSize.y * pos.x + pos.y) * 4 * 3;
		float *vertArray = (float*)m_pVertices;

		ccQuad3 ret;
		memcpy(&ret, &vertArray[idx], sizeof(ccQuad3));

		return ret;
	}

	void CCTiledGrid3D::reuse(void)
	{
		if (m_nReuseGrid > 0)
		{
			int numQuads = m_sGridSize.x * m_sGridSize.y;

			memcpy(m_pOriginalVertices, m_pVertices, numQuads * 12 * sizeof(GLfloat));
			--m_nReuseGrid;
		}
	}
} // end of namespace cocos2d