mirror of https://github.com/axmolengine/axmol.git
372 lines
10 KiB
C++
372 lines
10 KiB
C++
/****************************************************************************
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Copyright (c) 2010-2012 cocos2d-x.org
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Copyright (c) 2011 ForzeField Studios S.L.
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http://www.cocos2d-x.org
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN false EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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****************************************************************************/
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#include "CCMotionStreak.h"
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#include "CCTextureCache.h"
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#include "ccGLStateCache.h"
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#include "CCGLProgram.h"
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#include "CCShaderCache.h"
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#include "ccMacros.h"
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#include "support/CCVertex.h"
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#include "CCPointExtension.h"
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NS_CC_BEGIN
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CCMotionStreak::CCMotionStreak()
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: m_bFastMode(false)
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, m_pTexture(NULL)
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, m_tPositionR(CCPointZero)
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, m_tColor(ccc3(0,0,0))
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, m_fStroke(0.0f)
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, m_fFadeDelta(0.0f)
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, m_fMinSeg(0.0f)
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, m_uMaxPoints(0)
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, m_uNuPoints(0)
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, m_uPreviousNuPoints(0)
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, m_pPointVertexes(NULL)
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, m_pPointState(NULL)
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, m_pVertices(NULL)
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, m_pColorPointer(NULL)
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, m_pTexCoords(NULL)
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, m_bStartingPositionInitialized(false)
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{
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m_tBlendFunc.src = GL_SRC_ALPHA;
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m_tBlendFunc.dst = GL_ONE_MINUS_SRC_ALPHA;
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}
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CCMotionStreak::~CCMotionStreak()
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{
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CC_SAFE_RELEASE(m_pTexture);
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CC_SAFE_FREE(m_pPointState);
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CC_SAFE_FREE(m_pPointVertexes);
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CC_SAFE_FREE(m_pVertices);
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CC_SAFE_FREE(m_pColorPointer);
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CC_SAFE_FREE(m_pTexCoords);
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}
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CCMotionStreak* CCMotionStreak::streakWithFade(float fade, float minSeg, float stroke, ccColor3B color, const char* path)
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{
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return CCMotionStreak::create(fade, minSeg, stroke, color, path);
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}
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CCMotionStreak* CCMotionStreak::create(float fade, float minSeg, float stroke, ccColor3B color, const char* path)
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{
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CCMotionStreak *pRet = new CCMotionStreak();
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if (pRet && pRet->initWithFade(fade, minSeg, stroke, color, path))
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{
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pRet->autorelease();
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return pRet;
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}
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CC_SAFE_DELETE(pRet);
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return NULL;
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}
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CCMotionStreak* CCMotionStreak::streakWithFade(float fade, float minSeg, float stroke, ccColor3B color, CCTexture2D* texture)
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{
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return CCMotionStreak::create(fade, minSeg, stroke, color, texture);
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}
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CCMotionStreak* CCMotionStreak::create(float fade, float minSeg, float stroke, ccColor3B color, CCTexture2D* texture)
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{
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CCMotionStreak *pRet = new CCMotionStreak();
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if (pRet && pRet->initWithFade(fade, minSeg, stroke, color, texture))
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{
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pRet->autorelease();
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return pRet;
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}
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CC_SAFE_DELETE(pRet);
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return NULL;
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}
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bool CCMotionStreak::initWithFade(float fade, float minSeg, float stroke, ccColor3B color, const char* path)
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{
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CCAssert(path != NULL, "Invalid filename");
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CCTexture2D *texture = CCTextureCache::sharedTextureCache()->addImage(path);
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return initWithFade(fade, minSeg, stroke, color, texture);
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}
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bool CCMotionStreak::initWithFade(float fade, float minSeg, float stroke, ccColor3B color, CCTexture2D* texture)
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{
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CCNode::setPosition(CCPointZero);
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setAnchorPoint(CCPointZero);
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ignoreAnchorPointForPosition(true);
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m_bStartingPositionInitialized = false;
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m_tPositionR = CCPointZero;
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m_bFastMode = true;
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m_fMinSeg = (minSeg == -1.0f) ? stroke/5.0f : minSeg;
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m_fMinSeg *= m_fMinSeg;
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m_fStroke = stroke;
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m_fFadeDelta = 1.0f/fade;
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m_uMaxPoints = (int)(fade*60.0f)+2;
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m_uNuPoints = 0;
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m_pPointState = (float *)malloc(sizeof(float) * m_uMaxPoints);
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m_pPointVertexes = (CCPoint*)malloc(sizeof(CCPoint) * m_uMaxPoints);
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m_pVertices = (ccVertex2F*)malloc(sizeof(ccVertex2F) * m_uMaxPoints * 2);
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m_pTexCoords = (ccTex2F*)malloc(sizeof(ccTex2F) * m_uMaxPoints * 2);
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m_pColorPointer = (GLubyte*)malloc(sizeof(GLubyte) * m_uMaxPoints * 2 * 4);
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// Set blend mode
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m_tBlendFunc.src = GL_SRC_ALPHA;
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m_tBlendFunc.dst = GL_ONE_MINUS_SRC_ALPHA;
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// shader program
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setShaderProgram(CCShaderCache::sharedShaderCache()->programForKey(kCCShader_PositionTextureColor));
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setTexture(texture);
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setColor(color);
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scheduleUpdate();
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return true;
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}
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void CCMotionStreak::setPosition(const CCPoint& position)
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{
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m_bStartingPositionInitialized = true;
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m_tPositionR = position;
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}
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void CCMotionStreak::tintWithColor(ccColor3B colors)
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{
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setColor(colors);
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// Fast assignation
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for(unsigned int i = 0; i<m_uNuPoints*2; i++)
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{
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*((ccColor3B*) (m_pColorPointer+i*4)) = colors;
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}
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}
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CCTexture2D* CCMotionStreak::getTexture(void)
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{
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return m_pTexture;
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}
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void CCMotionStreak::setTexture(CCTexture2D *texture)
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{
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if (m_pTexture != texture)
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{
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CC_SAFE_RETAIN(texture);
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CC_SAFE_RELEASE(m_pTexture);
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m_pTexture = texture;
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}
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}
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void CCMotionStreak::setBlendFunc(ccBlendFunc blendFunc)
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{
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m_tBlendFunc = blendFunc;
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}
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ccBlendFunc CCMotionStreak::getBlendFunc(void)
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{
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return m_tBlendFunc;
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}
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void CCMotionStreak::setColor(const ccColor3B& color)
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{
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m_tColor = color;
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}
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const ccColor3B& CCMotionStreak::getColor(void)
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{
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return m_tColor;
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}
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void CCMotionStreak::setOpacity(GLubyte opacity)
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{
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CCAssert(false, "Set opacity no supported");
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}
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GLubyte CCMotionStreak::getOpacity(void)
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{
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CCAssert(false, "Opacity no supported");
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return 0;
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}
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void CCMotionStreak::setOpacityModifyRGB(bool bValue)
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{
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CC_UNUSED_PARAM(bValue);
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}
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bool CCMotionStreak::isOpacityModifyRGB(void)
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{
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return false;
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}
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void CCMotionStreak::update(float delta)
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{
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if (!m_bStartingPositionInitialized)
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{
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return;
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}
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delta *= m_fFadeDelta;
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unsigned int newIdx, newIdx2, i, i2;
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unsigned int mov = 0;
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// Update current points
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for(i = 0; i<m_uNuPoints; i++)
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{
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m_pPointState[i]-=delta;
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if(m_pPointState[i] <= 0)
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mov++;
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else
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{
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newIdx = i-mov;
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if(mov>0)
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{
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// Move data
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m_pPointState[newIdx] = m_pPointState[i];
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// Move point
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m_pPointVertexes[newIdx] = m_pPointVertexes[i];
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// Move vertices
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i2 = i*2;
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newIdx2 = newIdx*2;
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m_pVertices[newIdx2] = m_pVertices[i2];
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m_pVertices[newIdx2+1] = m_pVertices[i2+1];
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// Move color
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i2 *= 4;
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newIdx2 *= 4;
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m_pColorPointer[newIdx2+0] = m_pColorPointer[i2+0];
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m_pColorPointer[newIdx2+1] = m_pColorPointer[i2+1];
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m_pColorPointer[newIdx2+2] = m_pColorPointer[i2+2];
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m_pColorPointer[newIdx2+4] = m_pColorPointer[i2+4];
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m_pColorPointer[newIdx2+5] = m_pColorPointer[i2+5];
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m_pColorPointer[newIdx2+6] = m_pColorPointer[i2+6];
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}else
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newIdx2 = newIdx*8;
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const GLubyte op = (GLubyte)(m_pPointState[newIdx] * 255.0f);
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m_pColorPointer[newIdx2+3] = op;
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m_pColorPointer[newIdx2+7] = op;
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}
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}
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m_uNuPoints-=mov;
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// Append new point
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bool appendNewPoint = true;
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if(m_uNuPoints >= m_uMaxPoints)
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{
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appendNewPoint = false;
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}
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else if(m_uNuPoints>0)
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{
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bool a1 = ccpDistanceSQ(m_pPointVertexes[m_uNuPoints-1], m_tPositionR) < m_fMinSeg;
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bool a2 = (m_uNuPoints == 1) ? false : (ccpDistanceSQ(m_pPointVertexes[m_uNuPoints-2], m_tPositionR) < (m_fMinSeg * 2.0f));
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if(a1 || a2)
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{
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appendNewPoint = false;
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}
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}
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if(appendNewPoint)
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{
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m_pPointVertexes[m_uNuPoints] = m_tPositionR;
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m_pPointState[m_uNuPoints] = 1.0f;
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// Color asignation
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const unsigned int offset = m_uNuPoints*8;
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*((ccColor3B*)(m_pColorPointer + offset)) = m_tColor;
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*((ccColor3B*)(m_pColorPointer + offset+4)) = m_tColor;
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// Opacity
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m_pColorPointer[offset+3] = 255;
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m_pColorPointer[offset+7] = 255;
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// Generate polygon
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if(m_uNuPoints > 0 && m_bFastMode )
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{
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if(m_uNuPoints > 1)
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{
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ccVertexLineToPolygon(m_pPointVertexes, m_fStroke, m_pVertices, m_uNuPoints, 1);
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}
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else
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{
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ccVertexLineToPolygon(m_pPointVertexes, m_fStroke, m_pVertices, 0, 2);
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}
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}
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m_uNuPoints ++;
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}
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if( ! m_bFastMode )
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{
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ccVertexLineToPolygon(m_pPointVertexes, m_fStroke, m_pVertices, 0, m_uNuPoints);
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}
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// Updated Tex Coords only if they are different than previous step
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if( m_uNuPoints && m_uPreviousNuPoints != m_uNuPoints ) {
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float texDelta = 1.0f / m_uNuPoints;
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for( i=0; i < m_uNuPoints; i++ ) {
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m_pTexCoords[i*2] = tex2(0, texDelta*i);
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m_pTexCoords[i*2+1] = tex2(1, texDelta*i);
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}
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m_uPreviousNuPoints = m_uNuPoints;
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}
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}
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void CCMotionStreak::reset()
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{
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m_uNuPoints = 0;
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}
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void CCMotionStreak::draw()
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{
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if(m_uNuPoints <= 1)
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return;
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CC_NODE_DRAW_SETUP();
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ccGLEnableVertexAttribs(kCCVertexAttribFlag_PosColorTex );
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ccGLBlendFunc( m_tBlendFunc.src, m_tBlendFunc.dst );
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ccGLBindTexture2D( m_pTexture->getName() );
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glVertexAttribPointer(kCCVertexAttrib_Position, 2, GL_FLOAT, GL_FALSE, 0, m_pVertices);
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glVertexAttribPointer(kCCVertexAttrib_TexCoords, 2, GL_FLOAT, GL_FALSE, 0, m_pTexCoords);
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glVertexAttribPointer(kCCVertexAttrib_Color, 4, GL_UNSIGNED_BYTE, GL_TRUE, 0, m_pColorPointer);
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glDrawArrays(GL_TRIANGLE_STRIP, 0, (GLsizei)m_uNuPoints*2);
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CC_INCREMENT_GL_DRAWS(1);
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}
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NS_CC_END
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