//引用 封装的CCRippleSprite.h 类（）
//
// pgeRippleSprite.h
// rippleDemo
//
// Created by Lars Birkemose on 02/12/11.
// Copyright 2011 Protec Electronics. All rights reserved.
//
// --------------------------------------------------------------------------
// import headers
#include "cocos2d.h"
#include <vector>
using namespace std;
// --------------------------------------------------------------------------
// defines
#define RIPPLE_DEFAULT_QUAD_COUNT_X 60
#define RIPPLE_DEFAULT_QUAD_COUNT_Y 40
#define RIPPLE_BASE_GAIN 0.1f // an internal constant
#define RIPPLE_DEFAULT_RADIUS 100
#define RIPPLE_DEFAULT_RIPPLE_CYCLE 0.25f // timing on ripple ( 1/frequenzy )
#define RIPPLE_DEFAULT_LIFESPAN 1.4f // entire ripple lifespan
// #define RIPPLE_BOUNCE // makes ripples bounce off edges
#define RIPPLE_CHILD_MODIFIER 2.0f // strength modifier
// --------------------------------------------------------------------------
// typedefs
typedef enum {
RIPPLE_TYPE_RUBBER,// a soft rubber sheet
RIPPLE_TYPE_GEL,// high viscosity fluid
RIPPLE_TYPE_WATER,// low viscosity fluid
} RIPPLE_TYPE;
typedef enum {
RIPPLE_CHILD_LEFT,RIPPLE_CHILD_TOP,RIPPLE_CHILD_RIGHT,RIPPLE_CHILD_BOTTOM,RIPPLE_CHILD_COUNT
} RIPPLE_CHILD;
USING_NS_CC;
typedef struct _rippleData {
bool parent; // ripple is a parent
bool childCreated[ 4 ]; // child created ( in the 4 direction )
RIPPLE_TYPE rippleType; // type of ripple ( se update: )
CCPoint center; // ripple center ( but you just knew that,didn't you? )
CCPoint centerCoordinate; // ripple center in texture coordinates
float radius; // radius at which ripple has faded 100%
float strength; // ripple strength
float runtime; // current run time
float currentRadius; // current radius
float rippleCycle; // ripple cycle timing
float lifespan; // total life span
} rippleData;
// --------------------------------------------------------------------------
// interface
class pgeRippleSprite : public CCSprite,public CCTargetedTouchDelegate {
public:
//static methods:
static pgeRippleSprite* create(const char * filename);
static pgeRippleSprite* create(CCRenderTexture* rtt,float scale);
pgeRippleSprite();
~pgeRippleSprite();
bool initWithFile(const char* filename);
bool initWithRendertexture(CCRenderTexture* rtt,float scale);
void tesselate();
void addRipple(CCPoint pos,RIPPLE_TYPE type,float strength);
void addRippleChild(rippleData* parent,RIPPLE_CHILD type);
void update(float dt);
CCTexture2D* spriteTexture();
virtual void draw();
virtual void onEnterTransitionDidFinish();
virtual void onExit();
virtual bool ccTouchBegan(CCTouch *pTouch,CCEvent *pEvent);
virtual void ccTouchMoved(CCTouch *pTouch,CCEvent *pEvent);
virtual void ccTouchEnded(CCTouch *pTouch,CCEvent *pEvent);
virtual void ccTouchCancelled(CCTouch *pTouch,CCEvent *pEvent);
private:
bool isPointInsideSprite(CCPoint pos);
bool isTouchInsideSprite(CCTouch* pTouch);
CCTexture2D* m_texture;
int m_quadCountX; // quad count in x and y direction
int m_quadCountY;
int m_VerticesPrStrip; // number of vertices in a strip
int m_bufferSize; // vertice buffer size
CCPoint* m_vertice; // vertices
CCPoint* m_textureCoordinate; // texture coordinates ( original )
CCPoint* m_rippleCoordinate; // texture coordinates ( ripple corrected )
bool* m_edgeVertice; // vertice is a border vertice
vector<rippleData*> m_rippleList; // list of running ripples
CCPoint screenSize;
float scaleRTT;
float runTime;
};
CCRippleSprite.cpp类
//
// CCRippleSprite.cpp
// RippleDemo-x
//
// Created by guanghui on 7/30/13.
//
//
#include "CCRippleSprite.h"
#include <string>
using namespace std;
pgeRippleSprite* pgeRippleSprite::create(const char * filename)
{
pgeRippleSprite *pSprite = new pgeRippleSprite();
if (pSprite && pSprite->initWithFile(filename)) {
pSprite->autorelease();
return pSprite;
}
else
{
delete pSprite;
pSprite = NULL;
return NULL;
}
}
pgeRippleSprite::pgeRippleSprite()
:m_texture(NULL),m_quadCountX(0),m_quadCountY(0),m_VerticesPrStrip(0),m_bufferSize(0),m_vertice(NULL),m_textureCoordinate(NULL),m_rippleCoordinate(NULL),m_edgeVertice(NULL),scaleRTT(0),screenSize(CCPointZero),runTime(0)
{
}
pgeRippleSprite::~pgeRippleSprite()
{
rippleData* runningRipple;
free(m_vertice);
free(m_textureCoordinate);
free(m_rippleCoordinate);
free(m_edgeVertice);
for (int count = 0; count < m_rippleList.size(); count++) {
runningRipple = m_rippleList.at(count);
free(runningRipple);
}
m_texture->release();
}
bool pgeRippleSprite::initWithFile(const char* filename)
{
bool bRet = true;
do {
if (!CCSprite::init()) {
bRet = false;
break;
}
scaleRTT = 1.0f;
//load texture
m_texture = CCTextureCache::sharedTextureCache()->addImage(filename);
m_texture->retain();
//reset internal data
m_vertice = NULL;
m_textureCoordinate = NULL;
//builds the vertice and texture-coordinate array
m_quadCountX = RIPPLE_DEFAULT_QUAD_COUNT_X;
m_quadCountY = RIPPLE_DEFAULT_QUAD_COUNT_Y;
this->tesselate();
screenSize = ccp(m_texture->getContentSize().width / scaleRTT,m_texture->getContentSize().height / scaleRTT);
this->setShaderProgram(CCShaderCache::sharedShaderCache()->programForKey(kCCShader_PositionTexture));
} while (0);
return bRet;
}
void pgeRippleSprite::tesselate()
{
int vertexPos = 0;
CCPoint normalized;
// clear buffers ( yeah,clearing nil buffers first time around )
free( m_vertice );
free( m_textureCoordinate );
free( m_rippleCoordinate );
free( m_edgeVertice );
// calculate vertices pr strip
m_VerticesPrStrip = 2 * ( m_quadCountX + 1 );
// calculate buffer size
m_bufferSize = m_VerticesPrStrip * m_quadCountY;
// allocate buffers
m_vertice = (CCPoint*)malloc( m_bufferSize * sizeof( CCPoint ) );
m_textureCoordinate = (CCPoint*)malloc( m_bufferSize * sizeof( CCPoint ) );
m_rippleCoordinate = (CCPoint*)malloc( m_bufferSize * sizeof( CCPoint ) );
m_edgeVertice = (bool*)malloc( m_bufferSize * sizeof( bool ) );
// reset vertice pointer
vertexPos = 0;
// create all vertices and default texture coordinates
// scan though y quads,and create an x-oriented triangle strip for each
for ( int y = 0; y < m_quadCountY; y ++ ) {
// x counts to quadcount + 1,because number of vertices is number of quads + 1
for ( int x = 0; x < ( m_quadCountX + 1 ); x ++ ) {
// for each x vertex,an upper and lower y position is calculated,to create the triangle strip
// upper + lower + upper + lower
for ( int yy = 0; yy < 2; yy ++ ) {
// first simply calculate a normalized position into rectangle
normalized.x = ( float )x / ( float )m_quadCountX;
normalized.y = ( float )( y + yy ) / ( float )m_quadCountY;
// calculate vertex by multiplying rectangle ( texture ) size
m_vertice[vertexPos] = ccp(normalized.x * m_texture->getContentSize().width / scaleRTT,normalized.y *
m_texture->getContentSize().height / scaleRTT );
// adjust texture coordinates according to texture size
// as a texture is always in the power of 2,maxS and maxT are the fragment of the size actually used
// invert y on texture coordinates
m_textureCoordinate[vertexPos] = ccp(normalized.x * m_texture->getMaxS(),m_texture->getMaxT() - normalized.y *
m_texture->getMaxT());
// check if vertice is an edge vertice,because edge vertices are never modified to keep outline consistent
m_edgeVertice[ vertexPos ] = (
( x == 0 ) ||
( x == m_quadCountX ) ||
( ( y == 0 ) && ( yy == 0 ) ) ||
( ( y == ( m_quadCountY - 1 ) ) && ( yy > 0 ) ) );
// next buffer pos
vertexPos ++;
}
}
}
}
void pgeRippleSprite::addRipple(CCPoint pos,float strength)
{
rippleData* newRipple;
// allocate new ripple
newRipple = (rippleData*)malloc( sizeof( rippleData ) );
// initialize ripple
newRipple->parent = true;
for ( int count = 0; count < 4; count ++ ) newRipple->childCreated[ count ] = false;
newRipple->rippleType = type;
newRipple->center = pos;
newRipple->centerCoordinate = ccp(pos.x / m_texture->getContentSize().width * m_texture->getMaxS() / scaleRTT,m_texture->getMaxT() - (pos.y / m_texture->getContentSize().height * m_texture->getMaxT()/scaleRTT));
newRipple->radius = RIPPLE_DEFAULT_RADIUS; // * strength;
newRipple->strength = strength;
newRipple->runtime = 0;
newRipple->currentRadius = 0;
newRipple->rippleCycle = RIPPLE_DEFAULT_RIPPLE_CYCLE;
newRipple->lifespan = RIPPLE_DEFAULT_LIFESPAN;
// add ripple to running list
m_rippleList.push_back(newRipple);
}
void pgeRippleSprite::addRippleChild(rippleData* parent,RIPPLE_CHILD type)
{
rippleData* newRipple;
CCPoint pos;
//CGSize screenSize = [CCDirector sharedDirector].winSize;
// allocate new ripple
newRipple = (rippleData*)malloc( sizeof( rippleData ) );
// new ripple is pretty much a copy of its parent
memcpy( newRipple,parent,sizeof( rippleData ) );
// not a parent
newRipple->parent = false;
// mirror position
switch ( type ) {
case RIPPLE_CHILD_LEFT:
pos = ccp( -parent->center.x,parent->center.y );
break;
case RIPPLE_CHILD_TOP:
pos = ccp( parent->center.x,screenSize.y + ( screenSize.y - parent->center.y ) );
break;
case RIPPLE_CHILD_RIGHT:
pos = ccp( screenSize.x + ( screenSize.x - parent->center.x ),parent->center.y );
break;
case RIPPLE_CHILD_BOTTOM:
default:
pos = ccp( parent->center.x,-parent->center.y );
break;
}
newRipple->center = pos;
newRipple->centerCoordinate = ccp(pos.x / m_texture->getContentSize().width * m_texture->getMaxS(),m_texture->getMaxT() - (pos.y / m_texture->getContentSize().height * m_texture->getMaxT()));
newRipple->strength *= RIPPLE_CHILD_MODIFIER;
// indicate child used
parent->childCreated[ type ] = true;
// add ripple to running list
m_rippleList.push_back(newRipple);
}
void pgeRippleSprite::update(float dt)
{
//runTime += dt;
rippleData* ripple;
CCPoint pos;
float distance,correction;
//CGSize screenSize = [CCDirector sharedDirector].winSize;
// test if any ripples at all
if ( m_rippleList.size() == 0 ) return;
// ripples are simulated by altering texture coordinates
// on all updates,an entire new array is calculated from the base array
// not maintainng an original set of texture coordinates,could result in accumulated errors
memcpy( m_rippleCoordinate,m_textureCoordinate,m_bufferSize * sizeof( CCPoint ) );
// scan through running ripples
// the scan is backwards,so that ripples can be removed on the fly
for ( int count = ( m_rippleList.size() - 1 ); count >= 0; count -- ) {
// get ripple data
ripple = m_rippleList[count];
// scan through all texture coordinates
for ( int count = 0; count < m_bufferSize; count ++ ) {
// dont modify edge vertices
if ( m_edgeVertice[ count ] == false ) {
// calculate distance
// you might think it would be faster to do a Box check first
// but it really isnt,// ccpDistance is like my sexlife - BAM! - and its all over
distance = ccpDistance( ripple->center,m_vertice[ count ] );
// only modify vertices within range
if ( distance <= ripple->currentRadius ) {
// load the texture coordinate into an easy to use var
pos = m_rippleCoordinate[ count ];
// calculate a ripple
switch ( ripple->rippleType ) {
case RIPPLE_TYPE_RUBBER:
// method A
// calculate a sinus,based only on time
// this will make the ripples look like poking a soft rubber sheet,since sinus position is fixed
correction = sinf( 2 * M_PI * ripple->runtime / ripple->rippleCycle );
break;
case RIPPLE_TYPE_GEL:
// method B
// calculate a sinus,based both on time and distance
// this will look more like a high viscosity fluid,since sinus will travel with radius
correction = sinf( 2 * M_PI * ( ripple->currentRadius - distance ) / ripple->radius * ripple->lifespan / ripple->rippleCycle );
break;
case RIPPLE_TYPE_WATER:
default:
// method c
// like method b,but faded for time and distance to center
// this will look more like a low viscosity fluid,like water
correction = ( ripple->radius * ripple->rippleCycle / ripple->lifespan ) / ( ripple->currentRadius - distance );
if ( correction > 1.0f ) correction = 1.0f;
// fade center of quicker
correction *= correction;
correction *= sinf( 2 * M_PI * ( ripple->currentRadius - distance ) / ripple->radius * ripple->lifespan / ripple->rippleCycle );
break;
}
// fade with distance
correction *= 1 - ( distance / ripple->currentRadius );
// fade with time
correction *= 1 - ( ripple->runtime / ripple->lifespan );
// adjust for base gain and user strength
correction *= RIPPLE_BASE_GAIN;
correction *= ripple->strength;
// finally modify the coordinate by interpolating
// because of interpolation,adjustment for distance is needed,correction /= ccpDistance( ripple->centerCoordinate,pos );
pos = ccpAdd( pos,ccpMult( ccpSub( pos,ripple->centerCoordinate ),correction ) );
// another approach for applying correction,would be to calculate slope from center to pos
// and then adjust based on this
// clamp texture coordinates to avoid artifacts
pos = ccpClamp( pos,CCPointZero,ccp( m_texture->getMaxS(),m_texture->getMaxT() ) );
// save modified coordinate
m_rippleCoordinate[ count ] = pos;
}
}
}
// calculate radius
ripple->currentRadius = ripple->radius * ripple->runtime / ripple->lifespan;
// check if ripple should expire
ripple->runtime += dt;
if ( ripple->runtime >= ripple->lifespan ) {
// free memory,and remove from list
free( ripple );
m_rippleList.erase(m_rippleList.begin() + count);
} else {
#ifdef RIPPLE_BOUNCE
// check for creation of child ripples
if ( ripple->parent == true ) {
// left ripple
if ( ( ripple->childCreated[ RIPPLE_CHILD_LEFT ] == false ) && ( ripple->currentRadius > ripple->center.x ) ) {
this->addRippleChild(ripple,RIPPLE_CHILD_LEFT);
}
// top ripple
if ( ( ripple->childCreated[ RIPPLE_CHILD_TOP ] == false ) && ( ripple->currentRadius > screenSize.y - ripple->center.y ) ) {
this->addRippleChild(ripple,RIPPLE_CHILD_TOP);
}
// right ripple
if ( ( ripple->childCreated[ RIPPLE_CHILD_RIGHT ] == false ) && ( ripple->currentRadius > screenSize.x - ripple->center.x ) ) {
this->addRippleChild(ripple,RIPPLE_CHILD_RIGHT);
}
// bottom ripple
if ( ( ripple->childCreated[ RIPPLE_CHILD_BOTTOM ] == false ) && ( ripple->currentRadius > ripple->center.y ) ) {
this->addRippleChild(ripple,RIPPLE_CHILD_BOTTOM);
}
}
#endif
}
}
}
CCTexture2D* pgeRippleSprite::spriteTexture()
{
return m_texture;
}
void pgeRippleSprite::draw()
{
if (!this->isVisible()) {
return;
}
CC_NODE_DRAW_SETUP();
ccGLEnableVertexAttribs( kCCVertexAttribFlag_Position | kCCVertexAttribFlag_TexCoords );
ccGLBindTexture2D(m_texture->getName() );
// vertex
glVertexAttribPointer(kCCVertexAttrib_Position,2,GL_FLOAT,GL_FALSE,(void*) m_vertice);
// if no ripples running,use original coordinates ( Yay,dig that kewl old school C Syntax )
glVertexAttribPointer(kCCVertexAttrib_TexCoords,( m_rippleList.size() == 0 ) ? m_textureCoordinate : m_rippleCoordinate);
// draw as many triangle fans,as quads in y direction
for ( int strip = 0; strip < m_quadCountY; strip++ ) {
glDrawArrays( GL_TRIANGLE_STRIP,strip * m_VerticesPrStrip,m_VerticesPrStrip );
}
}
bool pgeRippleSprite::isPointInsideSprite(cocos2d::CCPoint pos)
{
float maxX = m_texture->getContentSize().width / scaleRTT;
float maxY = m_texture->getContentSize().height / scaleRTT;
if(pos.x < 0 || pos.y < 0 ||
pos.x > maxX || pos.y > maxY) {
return false;
}
else {
return true;
}
}
bool pgeRippleSprite::isTouchInsideSprite(cocos2d::CCTouch *pTouch)
{
CCPoint pos;
pos = pTouch->getLocationInView();
pos = CCDirector::sharedDirector()->convertToGL(pos);
pos = this->convertToNodeSpace(pos);
return this->isPointInsideSprite(pos);
}
#pragma mark - touch events
bool pgeRippleSprite::ccTouchBegan(cocos2d::CCTouch *pTouch,cocos2d::CCEvent *pEvent)
{
if (!this->isTouchInsideSprite(pTouch)) {
return false;
}
this->ccTouchMoved(pTouch,pEvent);
return true;
}
void pgeRippleSprite::ccTouchMoved(cocos2d::CCTouch *pTouch,cocos2d::CCEvent *pEvent)
{
CCPoint pos;
pos = pTouch->getLocationInView();
pos = CCDirector::sharedDirector()->convertToGL(pos);
pos = this->convertToNodeSpace(pos);
this->addRipple(pos,RIPPLE_TYPE_WATER,2.0f);
//runTime += 1.0 / 60.0f;
}
void pgeRippleSprite::ccTouchCancelled(cocos2d::CCTouch *pTouch,cocos2d::CCEvent *pEvent)
{
//no-op
}
void pgeRippleSprite::ccTouchEnded(cocos2d::CCTouch *pTouch,cocos2d::CCEvent *pEvent)
{
//no-op
}
void pgeRippleSprite::onEnterTransitionDidFinish()
{
CCSprite::onEnterTransitionDidFinish();
CCDirector::sharedDirector()->getTouchDispatcher()->addTargetedDelegate(this,true);
}
void pgeRippleSprite::onExit()
{
CCSprite::onExit();
CCDirector::sharedDirector()->getTouchDispatcher()->removeDelegate(this);
}
实现效果
rippleSprite = pgeRippleSprite::create("image.png");
rippleSprite->setScale(480.0 / 320);
this->addChild(rippleSprite);
void HelloWorld::update( float dt )
{
//-----------start(水纹效果相关)-------------------
rippleSprite->update(dt);
//---------------end---------------------------------
//------------CCParallaxNode（相关代码）-----------------
/*float x = parallax_->getPositionX()-1;
parallax_->setPositionX(x);*/
//----------------end-------------------
}