axmol/cocos2dx/misc_nodes/CCProgressTimer.cpp

/****************************************************************************
Copyright (c) 2010 cocos2d-x.org

http://www.cocos2d-x.org

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
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The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/
#include "CCProgressTimer.h"

#include "ccMacros.h"
#include "CCTextureCache.h"
#include "CGPointExtension.h"

#include <float.h>

namespace cocos2d
{
	#define kProgressTextureCoordsCount 4
	const char kProgressTextureCoords = 0x1e;

	CCProgressTimer* CCProgressTimer::progressWithFile(const char *pszFileName)
	{
		CCProgressTimer *pProgressTimer = new CCProgressTimer();
		if (pProgressTimer->initWithFile(pszFileName))
		{
			pProgressTimer->autorelease();
		}
		else
		{
            delete pProgressTimer;
			pProgressTimer = NULL;
		}		

		return pProgressTimer;
	}

	bool CCProgressTimer::initWithFile(const char *pszFileName)
	{
		return this->initWithTexture(CCTextureCache::sharedTextureCache()->addImage(pszFileName));
	}

	CCProgressTimer* CCProgressTimer::progressWithTexture(cocos2d::CCTexture2D *pTexture)
	{
		CCProgressTimer *pProgressTimer = new CCProgressTimer();
		if (pProgressTimer->initWithTexture(pTexture))
		{
			pProgressTimer->autorelease();
		}
		else
		{
            delete pProgressTimer;
			pProgressTimer = NULL;
		}		

		return pProgressTimer;
	}

	bool CCProgressTimer::initWithTexture(cocos2d::CCTexture2D *pTexture)
	{
		m_pSprite = CCSprite::spriteWithTexture(pTexture);
		m_fPercentage = 0.f;
		m_pVertexData = NULL;
        m_nVertexDataCount = 0;
		m_tAnchorPoint = ccp(0.5f, 0.5f);
		setContentSize(m_pSprite->getContentSize());
        m_eType = kCCProgressTimerTypeRadialCCW;

		return true;
	}

	CCProgressTimer::~CCProgressTimer(void)
	{
		if (m_pVertexData)
		{
			delete[] m_pVertexData;
		}

		m_pSprite->release();
	}

	void CCProgressTimer::setPercentage(float fPercentage)
	{
		if (m_fPercentage != fPercentage)
		{
			if (m_fPercentage < 0.f)
			{
				m_fPercentage = 0.f;
			} else
			if (fPercentage > 100.0f)
			{
				m_fPercentage = 100.f;
			}
			else
			{
				m_fPercentage = fPercentage;
			}

			updateProgress();
		}
	}

	void CCProgressTimer::setSprite(cocos2d::CCSprite *pSprite)
	{
		if (m_pSprite != pSprite)
		{
			CCX_SAFE_RELEASE(m_pSprite);

			m_pSprite = pSprite;
			pSprite->retain();

			//	Everytime we set a new sprite, we free the current vertex data
			if (m_pVertexData)
			{
				delete[] m_pVertexData;
				m_pVertexData = NULL;
				m_nVertexDataCount = 0;
			}
		}		
	}

	void CCProgressTimer::setType(cocos2d::CCProgressTimerType type)
	{
		if (type != m_eType)
		{
			//	release all previous information
			if (m_pVertexData)
			{
				delete[] m_pVertexData;
				m_pVertexData = NULL;
				m_nVertexDataCount = 0;
			}

			m_eType = type;
		}
	}

	// Interval

	///
	//	@returns the vertex position from the texture coordinate
	///
	CGPoint CCProgressTimer::vertexFromTexCoord(cocos2d::CGPoint texCoord)
	{
		if (m_pSprite->getTexture())
		{
			return ccp(m_pSprite->getTexture()->getContentSize().width * texCoord.x / m_pSprite->getTexture()->getMaxS(),
				m_pSprite->getTexture()->getContentSize().height * (1 - (texCoord.y / m_pSprite->getTexture()->getMaxT())));
		}
		else
		{
			return CGPointZero;
		}
	}

	void CCProgressTimer::updateColor(void)
	{
		ccColor4F color = ccc4FFromccc3B(m_pSprite->getColor());
		if (m_pSprite->getTexture()->getHasPremultipliedAlpha())
		{
			float op = m_pSprite->getOpacity() / 255.f;
			color.r *= op;
			color.g *= op;
			color.b *= op;
			color.a = op;
		}
		else
		{
			color.a = m_pSprite->getOpacity() / 255.f;
		}

		if (m_pVertexData)
		{
			for (int i = 0; i < m_nVertexDataCount; ++i)
			{
				m_pVertexData[i].colors = color;
			}			
		}
	}

	void CCProgressTimer::updateProgress(void)
	{
		switch (m_eType)
		{
		case kCCProgressTimerTypeRadialCW:
		case kCCProgressTimerTypeRadialCCW:
            updateRadial();
			break;
		case kCCProgressTimerTypeHorizontalBarLR:
		case kCCProgressTimerTypeHorizontalBarRL:
		case kCCProgressTimerTypeVerticalBarBT:
		case kCCProgressTimerTypeVerticalBarTB:
			updateBar();
			break;
		default:
			break;
		}
	}

	///
	//	Update does the work of mapping the texture onto the triangles
	//	It now doesn't occur the cost of free/alloc data every update cycle.
	//	It also only changes the percentage point but no other points if they have not
	//	been modified.
	//	
	//	It now deals with flipped texture. If you run into this problem, just use the
	//	sprite property and enable the methods flipX, flipY.
	///
	void CCProgressTimer::updateRadial(void)
	{
		//	Texture Max is the actual max coordinates to deal with non-power of 2 textures
		CGPoint tMax = ccp(m_pSprite->getTexture()->getMaxS(),
			               m_pSprite->getTexture()->getMaxT());

		//	Grab the midpoint
		CGPoint midpoint = ccpCompMult(m_tAnchorPoint, tMax);

		float alpha = m_fPercentage / 100.f;

		//	Otherwise we can get the angle from the alpha
		float angle = 2.f * ((float)M_PI) * (m_eType == kCCProgressTimerTypeRadialCW ? alpha : 1.f - alpha);

		//	We find the vector to do a hit detection based on the percentage
		//	We know the first vector is the one @ 12 o'clock (top,mid) so we rotate 
		//	from that by the progress angle around the midpoint pivot
		CGPoint topMid = ccp(midpoint.x, 0.f);
		CGPoint percentagePt = ccpRotateByAngle(topMid, midpoint, angle);

		int index = 0;
		CGPoint hit = CGPointZero;

		if (alpha == 0.f)
		{
			//	More efficient since we don't always need to check intersection
			//	If the alpha is zero then the hit point is top mid and the index is 0.
			hit = topMid;
			index = 0;
		} else
		if (alpha == 1.f)
		{
			//	More efficient since we don't always need to check intersection
			//	If the alpha is one then the hit point is top mid and the index is 4.
			hit = topMid;
			index = 4;
		}
		else
		{
			//	We run a for loop checking the edges of the texture to find the
			//	intersection point
			//	We loop through five points since the top is split in half
			
			float min_t = FLT_MAX;

			for (int i = 0; i <= kProgressTextureCoordsCount; ++i)
			{
				int pIndex = (i + (kProgressTextureCoordsCount - 1)) % kProgressTextureCoordsCount;

				CGPoint edgePtA = ccpCompMult(boundaryTexCoord(i % kProgressTextureCoordsCount), tMax);
				CGPoint edgePtB = ccpCompMult(boundaryTexCoord(pIndex), tMax);

				//	Remember that the top edge is split in half for the 12 o'clock position
				//	Let's deal with that here by finding the correct endpoints
				if (i == 0)
				{
					edgePtB = ccpLerp(edgePtA, edgePtB, 0.5f);
				} else
				if (i == 4)
				{
					edgePtA = ccpLerp(edgePtA, edgePtB, 0.5f);
				}

				//	s and t are returned by ccpLineIntersect
				float s = 0;
				float t = 0;
				if (ccpLineIntersect(edgePtA, edgePtB, midpoint, percentagePt, &s, &t))
				{
					//	Since our hit test is on rays we have to deal with the top edge
					//	being in split in half so we have to test as a segment
					if (i == 0 || i == 4)
					{
						//	s represents the point between edgePtA--edgePtB
						if (!(0.f <= s && s <= 1.f))
						{
							continue;
						}
					}

					//	As long as our t isn't negative we are at least finding a 
					//	correct hitpoint from midpoint to percentagePt.
					if (t >= 0.f)
					{
						//	Because the percentage line and all the texture edges are
						//	rays we should only account for the shortest intersection
						if (t < min_t)
						{
							min_t = t;
							index = i;
						}
					}
				}
			
			}

            //	Now that we have the minimum magnitude we can use that to find our intersection
			hit = ccpAdd(midpoint, ccpMult(ccpSub(percentagePt, midpoint),min_t));
		}

        //	The size of the vertex data is the index from the hitpoint
		//	the 3 is for the midpoint, 12 o'clock point and hitpoint position.

		bool sameIndexCount = true;
		if (m_nVertexDataCount != index + 3)
		{
			sameIndexCount = false;
			if (m_pVertexData)
			{
				delete[] m_pVertexData;
				m_pVertexData = NULL;
				m_nVertexDataCount = 0;
			}
		}

		if (! m_pVertexData)
		{
			m_nVertexDataCount = index + 3;
			m_pVertexData = new ccV2F_C4F_T2F[m_nVertexDataCount];
			assert(m_pVertexData);

			updateColor();
		}

		if (! sameIndexCount)
		{
			//	First we populate the array with the midpoint, then all 
			//	vertices/texcoords/colors of the 12 'o clock start and edges and the hitpoint
			m_pVertexData[0].texCoords = tex2(midpoint.x, midpoint.y);
			m_pVertexData[0].vertices = vertexFromTexCoord(midpoint);

			m_pVertexData[1].texCoords = tex2(midpoint.x, 0.f);
			m_pVertexData[1].vertices = vertexFromTexCoord(ccp(midpoint.x, 0.f));

			for (int i = 0; i < index; ++i)
			{
				CGPoint texCoords = ccpCompMult(boundaryTexCoord(i), tMax);

				m_pVertexData[i+2].texCoords = tex2(texCoords.x, texCoords.y);
				m_pVertexData[i+2].vertices = vertexFromTexCoord(texCoords);
			}

			//	Flip the texture coordinates if set
			if (m_pSprite->isFlipX() || m_pSprite->isFlipY())
			{
				for (int i = 0; i < m_nVertexDataCount - 1; ++i)
				{
					if (m_pSprite->isFlipX())
					{
						m_pVertexData[i].texCoords.u = tMax.x - m_pVertexData[i].texCoords.u;
					}

					if (m_pSprite->isFlipY())
					{
						m_pVertexData[i].texCoords.v = tMax.y - m_pVertexData[i].texCoords.v;
					}
				}
			}
		}

		//	hitpoint will go last
		m_pVertexData[m_nVertexDataCount - 1].texCoords = tex2(hit.x, hit.y);
		m_pVertexData[m_nVertexDataCount - 1].vertices = vertexFromTexCoord(hit);

		if (m_pSprite->isFlipX() || m_pSprite->isFlipY())
		{
			if (m_pSprite->isFlipX())
			{
				m_pVertexData[m_nVertexDataCount - 1].texCoords.u = tMax.x - m_pVertexData[m_nVertexDataCount - 1].texCoords.u;
			}

            if (m_pSprite->isFlipY())
			{
				m_pVertexData[m_nVertexDataCount - 1].texCoords.v = tMax.y - m_pVertexData[m_nVertexDataCount - 1].texCoords.v;
			}
		}
	}

	///
	//	Update does the work of mapping the texture onto the triangles for the bar
	//	It now doesn't occur the cost of free/alloc data every update cycle.
	//	It also only changes the percentage point but no other points if they have not
	//	been modified.
	//	
	//	It now deals with flipped texture. If you run into this problem, just use the
	//	sprite property and enable the methods flipX, flipY.
	///
	void CCProgressTimer::updateBar(void)
	{
		float alpha = m_fPercentage / 100.f;

		CGPoint tMax = ccp(m_pSprite->getTexture()->getMaxS(), m_pSprite->getTexture()->getMaxT());

		unsigned char vIndexes[2] = {0, 0};

		//	We know vertex data is always equal to the 4 corners
		//	If we don't have vertex data then we create it here and populate
		//	the side of the bar vertices that won't ever change.
		if (! m_pVertexData)
		{
			m_nVertexDataCount = kProgressTextureCoordsCount;
			m_pVertexData = new ccV2F_C4F_T2F[m_nVertexDataCount];
			assert(m_pVertexData);

			if (m_eType == kCCProgressTimerTypeHorizontalBarLR)
			{
				m_pVertexData[vIndexes[0] = 0].texCoords = tex2(0, 0);
				m_pVertexData[vIndexes[1] = 1].texCoords = tex2(0, tMax.y);
			} else
			if (m_eType == kCCProgressTimerTypeHorizontalBarRL)
			{
				m_pVertexData[vIndexes[0] = 2].texCoords = tex2(tMax.x, tMax.y);
				m_pVertexData[vIndexes[1] = 3].texCoords = tex2(tMax.x, 0.f);
			} else
			if (m_eType == kCCProgressTimerTypeVerticalBarBT)
			{
				m_pVertexData[vIndexes[0] = 1].texCoords = tex2(0, tMax.y);
				m_pVertexData[vIndexes[1] = 3].texCoords = tex2(tMax.x, tMax.y);
			} else
			if (m_eType == kCCProgressTimerTypeVerticalBarTB)
			{
				m_pVertexData[vIndexes[0] = 0].texCoords = tex2(0, 0);
				m_pVertexData[vIndexes[1] = 2].texCoords = tex2(tMax.x, 0);
			}

			unsigned char index = vIndexes[0];
			m_pVertexData[index].vertices = vertexFromTexCoord(ccp(m_pVertexData[index].texCoords.u,
				                                                   m_pVertexData[index].texCoords.v));

			index = vIndexes[1];
			m_pVertexData[index].vertices = vertexFromTexCoord(ccp(m_pVertexData[index].texCoords.u,
				                                                   m_pVertexData[index].texCoords.v));

			if (m_pSprite->isFlipY() || m_pSprite->isFlipX())
			{
				if (m_pSprite->isFlipX())
				{
					unsigned char index = vIndexes[0];
					m_pVertexData[index].texCoords.u = tMax.x - m_pVertexData[index].texCoords.u;
					index = vIndexes[1];
					m_pVertexData[index].texCoords.u = tMax.x - m_pVertexData[index].texCoords.u;
				}

				if (m_pSprite->isFlipY())
				{
					unsigned char index = vIndexes[0];
					m_pVertexData[index].texCoords.v = tMax.y - m_pVertexData[index].texCoords.v;
					index = vIndexes[1];
					m_pVertexData[index].texCoords.v = tMax.y - m_pVertexData[index].texCoords.v;
				}
			}

			updateColor();
		}

		if(m_eType == kCCProgressTimerTypeHorizontalBarLR)
		{
			m_pVertexData[vIndexes[0] = 3].texCoords = tex2(tMax.x*alpha, tMax.y);
			m_pVertexData[vIndexes[1] = 2].texCoords = tex2(tMax.x*alpha, 0);
		} else 
		if (m_eType == kCCProgressTimerTypeHorizontalBarRL) 
		{
			m_pVertexData[vIndexes[0] = 1].texCoords = tex2(tMax.x*(1.f - alpha), 0);
			m_pVertexData[vIndexes[1] = 0].texCoords = tex2(tMax.x*(1.f - alpha), tMax.y);
		} else 
		if (m_eType == kCCProgressTimerTypeVerticalBarBT) 
		{
			m_pVertexData[vIndexes[0] = 0].texCoords = tex2(0, tMax.y*(1.f - alpha));
			m_pVertexData[vIndexes[1] = 2].texCoords = tex2(tMax.x, tMax.y*(1.f - alpha));
		} else 
		if (m_eType == kCCProgressTimerTypeVerticalBarTB) 
		{
			m_pVertexData[vIndexes[0] = 1].texCoords = tex2(0, tMax.y*alpha);
			m_pVertexData[vIndexes[1] = 3].texCoords = tex2(tMax.x, tMax.y*alpha);
		}

		unsigned char index = vIndexes[0];
		m_pVertexData[index].vertices = vertexFromTexCoord(ccp(m_pVertexData[index].texCoords.u,
			                                                   m_pVertexData[index].texCoords.v));
		index = vIndexes[1];
		m_pVertexData[index].vertices = vertexFromTexCoord(ccp(m_pVertexData[index].texCoords.u,
			                                                   m_pVertexData[index].texCoords.v));

		if (m_pSprite->isFlipY() || m_pSprite->isFlipX()) 
		{
			if (m_pSprite->isFlipX()) 
			{
				unsigned char index = vIndexes[0];
				m_pVertexData[index].texCoords.u = tMax.x - m_pVertexData[index].texCoords.u;
				index = vIndexes[1];
				m_pVertexData[index].texCoords.u = tMax.x - m_pVertexData[index].texCoords.u;
			}

			if (m_pSprite->isFlipY())
			{
				unsigned char index = vIndexes[0];
				m_pVertexData[index].texCoords.v = tMax.y - m_pVertexData[index].texCoords.v;
				index = vIndexes[1];
				m_pVertexData[index].texCoords.v = tMax.y - m_pVertexData[index].texCoords.v;
			}
		}
	}

	CGPoint CCProgressTimer::boundaryTexCoord(char index)
	{
		if (index < kProgressTextureCoordsCount) 
		{
			switch (m_eType) 
			{
			case kCCProgressTimerTypeRadialCW:
				return ccp( (float)((kProgressTextureCoords>>((index<<1)+1))&1), (float)((kProgressTextureCoords>>(index<<1))&1) );
			case kCCProgressTimerTypeRadialCCW:
				return ccp( (float)((kProgressTextureCoords>>(7-(index<<1)))&1), (float)((kProgressTextureCoords>>(7-((index<<1)+1)))&1));
			default:
				break;
			}
		}

		return CGPointZero;
	}

	void CCProgressTimer::draw(void)
	{
		if(! m_pVertexData) 
		{
			return;
		}

		if(! m_pSprite) 
		{
			return;
		}

		bool newBlend = false;

		ccBlendFunc bf = m_pSprite->getBlendFunc();
		if (bf.src != CC_BLEND_SRC || bf.dst != CC_BLEND_DST) 
		{
			newBlend = true;
			glBlendFunc(bf.src, bf.dst);
		}
		
		///	========================================================================
		//	Replaced [texture_ drawAtPoint:CGPointZero] with my own vertexData
		//	Everything above me and below me is copied from CCTextureNode's draw
		glBindTexture(GL_TEXTURE_2D, m_pSprite->getTexture()->getName());
		glVertexPointer(2, GL_FLOAT, sizeof(ccV2F_C4F_T2F), &m_pVertexData[0].vertices);
		glTexCoordPointer(2, GL_FLOAT, sizeof(ccV2F_C4F_T2F), &m_pVertexData[0].texCoords);
		glColorPointer(4, GL_FLOAT, sizeof(ccV2F_C4F_T2F), &m_pVertexData[0].colors);
		
		if(m_eType == kCCProgressTimerTypeRadialCCW || m_eType == kCCProgressTimerTypeRadialCW)
		{
			glDrawArrays(GL_TRIANGLE_FAN, 0, m_nVertexDataCount);
		} else 
		if (	m_eType == kCCProgressTimerTypeHorizontalBarLR ||
				m_eType == kCCProgressTimerTypeHorizontalBarRL ||
				m_eType == kCCProgressTimerTypeVerticalBarBT ||
				m_eType == kCCProgressTimerTypeVerticalBarTB) 
		{
			glDrawArrays(GL_TRIANGLE_STRIP, 0, m_nVertexDataCount);
		}
		//glDrawElements(GL_TRIANGLES, indicesCount_, GL_UNSIGNED_BYTE, indices_);
		///	========================================================================
		
		if( newBlend )
			glBlendFunc(CC_BLEND_SRC, CC_BLEND_DST);
		}
}