mirror of https://github.com/axmolengine/axmol.git
111 lines
4.3 KiB
C++
111 lines
4.3 KiB
C++
/****************************************************************************
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Copyright (c) 2010 cocos2d-x.org
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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 NO 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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#ifndef __CCRIBBON_H__
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#define __CCRIBBON_H__
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#include <gles/egl.h>
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#include "CCNode.h"
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#include "CCProtocols.h"
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namespace cocos2d {
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class CCRibbonSegment;
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/**
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* A CCRibbon is a dynamically generated list of polygons drawn as a single or series
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* of triangle strips. The primary use of CCRibbon is as the drawing class of Motion Streak,
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* but it is quite useful on it's own. When manually drawing a ribbon, you can call addPointAt
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* and pass in the parameters for the next location in the ribbon. The system will automatically
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* generate new polygons, texture them accourding to your texture width, etc, etc.
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*
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* CCRibbon data is stored in a CCRibbonSegment class. This class statically allocates enough verticies and
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* texture coordinates for 50 locations (100 verts or 48 triangles). The ribbon class will allocate
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* new segments when they are needed, and reuse old ones if available. The idea is to avoid constantly
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* allocating new memory and prefer a more static method. However, since there is no way to determine
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* the maximum size of some ribbons (motion streaks), a truely static allocation is not possible.
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*
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* @since v0.8.1
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*/
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class CCX_DLL CCRibbon : public CCNode, public CCTextureProtocol
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{
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/** Texture used by the ribbon. Conforms to CCTextureProtocol protocol */
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CCX_PROPERTY(CCTexture2D*, m_pTexture, Texture)
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/** Texture lenghts in pixels */
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CCX_PROPERTY(float, m_fTextureLength, TextureLength)
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/** GL blendind function */
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CCX_PROPERTY(ccBlendFunc, m_tBlendFunc, BlendFunc)
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/** color used by the Ribbon (RGBA) */
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CCX_PROPERTY(ccColor4B, m_tColor, Color)
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public:
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CCRibbon(){}
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virtual ~CCRibbon();
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/** creates the ribbon */
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static CCRibbon * ribbonWithWidth(float w, const char *path, float length, ccColor4B color, float fade);
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/** init the ribbon */
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bool initWithWidth(float w, const char *path, float length, ccColor4B color, float fade);
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/** add a point to the ribbon */
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void addPointAt(CGPoint location, float width);
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/** polling function */
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void update(ccTime delta);
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/** determine side of line */
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float sideOfLine(CGPoint p, CGPoint l1, CGPoint l2);
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// super method
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virtual void draw();
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private:
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/** rotates a point around 0, 0 */
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CGPoint rotatePoint(CGPoint vec, float rotation);
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protected:
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NSMutableArray<CCRibbonSegment*> *m_pSegments;
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NSMutableArray<CCRibbonSegment*> *m_pDeletedSegments;
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CGPoint m_tLastPoint1;
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CGPoint m_tLastPoint2;
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CGPoint m_tLastLocation;
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int m_nVertCount_;
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float m_fTexVPos;
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float m_fCurTime;
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float m_fFadeTime;
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float m_fDelta;
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float m_fLastWidth;
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float m_fLastSign;
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bool m_bPastFirstPoint;
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};
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/** object to hold ribbon segment data */
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class CCX_DLL CCRibbonSegment : public NSObject
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{
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public:
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GLfloat m_pVerts[50*6];
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GLfloat m_pCoords[50*4];
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GLubyte m_pColors[50*8];
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float m_pCreationTime[50];
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bool m_bFinished;
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unsigned int m_uEnd;
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unsigned int m_uBegin;
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public:
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CCRibbonSegment(){}
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virtual ~CCRibbonSegment();
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char * description();
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bool init();
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void reset();
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void draw(float curTime, float fadeTime, ccColor4B color);
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};
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} // namespace cocos2d
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#endif //__CCRIBBON_H__
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