fixed #59, complete CCMotionStreak

cocos2dx/cocos2dx-uphone.vcproj

@@ -336,6 +336,10 @@
 				RelativePath=".\include\CCMenuItem.h"
 				>
 			</File>
+			<File
+				RelativePath=".\include\CCMotionStreak.h"
+				>
+			</File>
 			<File
 				RelativePath=".\include\CCNode.h"
 				>
@@ -537,6 +541,10 @@
 		<Filter
 			Name="misc_nodes"
 			>
+			<File
+				RelativePath=".\misc_nodes\CCMotionStreak.cpp"
+				>
+			</File>
 			<File
 				RelativePath=".\misc_nodes\CCProgressTimer.cpp"
 				>

cocos2dx/include/CCMotionStreak.h

@@ -0,0 +1,72 @@
+/****************************************************************************
+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
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+****************************************************************************/
+#ifndef __CCMOTION_STREAK_H__
+#define __CCMOTION_STREAK_H__
+#include "CCNode.h"
+#include "CCProtocols.h"
+namespace cocos2d {
+	class CCRibbon;
+	/**
+	* CCMotionStreak manages a Ribbon based on it's motion in absolute space.
+	* You construct it with a fadeTime, minimum segment size, texture path, texture
+	* length and color. The fadeTime controls how long it takes each vertex in
+	* the streak to fade out, the minimum segment size it how many pixels the
+	* streak will move before adding a new ribbon segement, and the texture
+	* length is the how many pixels the texture is stretched across. The texture
+	* is vertically aligned along the streak segemnts. 
+	*
+	* Limitations:
+	*   CCMotionStreak, by default, will use the GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA blending function.
+	*   This blending function might not be the correct one for certain textures.
+	*   But you can change it by using:
+	*     [obj setBlendFunc: (ccBlendfunc) {new_src_blend_func, new_dst_blend_func}];
+	*
+	* @since v0.8.1
+	*/
+	class CCX_DLL CCMotionStreak : public CCNode, public CCTextureProtocol
+	{
+		/** Ribbon used by MotionStreak (weak reference) */
+		CCX_PROPERTY_READONLY(CCRibbon*, m_pRibbon, Ribbon)
+		//CCTextureProtocol methods
+		CCX_PROPERTY(CCTexture2D*, m_pTexture, Texture)
+		CCX_PROPERTY(ccBlendFunc, m_tBlendFunc, BlendFunc)
+	public:
+		CCMotionStreak(){}
+		virtual ~CCMotionStreak(){}
+		/** creates the a MotionStreak. The image will be loaded using the TextureMgr. */
+		static CCMotionStreak * streakWithFade(float fade, float seg, const char *imagePath, float width, float length, ccColor4B color);
+
+		/** initializes a MotionStreak. The file will be loaded using the TextureMgr. */
+		bool initWithFade(float fade, float seg, const char *imagePath, float width, float length, ccColor4B color);
+
+		/** polling function */
+		void update(ccTime delta);
+	protected:
+		float		m_fSegThreshold;
+		float		m_fWidth;
+		CGPoint		m_tLastLocation;
+	};
+} // namespace cocos2d
+
+#endif //__CCMOTION_STREAK_H__

cocos2dx/misc_nodes/CCMotionStreak.cpp

@@ -0,0 +1,93 @@
+/****************************************************************************
+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
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+****************************************************************************/
+#include "CCMotionStreak.h"
+#include "support/CGPointExtension.h"
+#include "CCRibbon.h"
+namespace cocos2d {
+	/*
+	 * Motion Streak manages a Ribbon based on it's motion in absolute space.
+	 * You construct it with a fadeTime, minimum segment size, texture path, texture
+	 * length and color. The fadeTime controls how long it takes each vertex in
+	 * the streak to fade out, the minimum segment size it how many pixels the
+	 * streak will move before adding a new ribbon segement, and the texture
+	 * length is the how many pixels the texture is stretched across. The texture
+	 * is vertically aligned along the streak segemnts. 
+	 */
+	//implementation CCMotionStreak
+
+	CCMotionStreak * CCMotionStreak::streakWithFade(float fade, float seg, const char *imagePath, float width, float length, ccColor4B color)
+	{
+		CCMotionStreak *pRet = new CCMotionStreak();
+		if(pRet->initWithFade(fade, seg, imagePath, width, length, color))
+		{
+			pRet->autorelease();
+			return pRet;
+		}
+		return NULL;
+	}
+	bool CCMotionStreak::initWithFade(float fade, float seg, const char *imagePath, float width, float length, ccColor4B color)
+	{
+		m_fSegThreshold = seg;
+		m_fWidth = width;
+		m_tLastLocation = CGPointZero;
+		m_pRibbon = CCRibbon::ribbonWithWidth(m_fWidth, imagePath, length, color, fade);
+		this->addChild(m_pRibbon);
+
+		// update ribbon position
+		this->schedule(schedule_selector(CCMotionStreak::update), 0);
+		return true;
+	}
+	void CCMotionStreak::update(ccTime delta)
+	{
+		CGPoint location = this->convertToWorldSpace(CGPointZero);
+		m_pRibbon->setPosition(ccp(-1*location.x, -1*location.y));
+		float len = sqrtf(powf(m_tLastLocation.x - location.x, 2) + powf(m_tLastLocation.y - location.y, 2));
+		if (len > m_fSegThreshold)
+		{
+			m_pRibbon->addPointAt(location, m_fWidth);
+			m_tLastLocation = location;
+		}
+		m_pRibbon->update(delta);
+	}
+
+	//MotionStreak - CocosNodeTexture protocol
+
+	void CCMotionStreak::setTexture(CCTexture2D* texture)
+	{
+		m_pRibbon->setTexture(texture);
+	}
+	CCTexture2D * CCMotionStreak::getTexture()
+	{
+		return m_pRibbon->getTexture();
+	}
+	ccBlendFunc CCMotionStreak::getBlendFunc()
+	{
+		return m_pRibbon->getBlendFunc();
+	}
+	void CCMotionStreak::setBlendFunc(ccBlendFunc blendFunc)
+	{
+		m_pRibbon->setBlendFunc(blendFunc);
+	}
+
+}// namespace cocos2d