void Fluid2DParticlesApp::touchesMoved( TouchEvent event )
{
float s = 10;
const std::vector<TouchEvent::Touch>& touches = event.getTouches();
for( std::vector<TouchEvent::Touch>::const_iterator cit = touches.begin(); cit != touches.end(); ++cit ) {
if( mTouchColors.find( cit->getId() ) == mTouchColors.end() )
continue;
vec2 prevPos = cit->getPrevPos();
vec2 pos = cit->getPos();
float x = (pos.x/(float)getWindowWidth())*mFluid2D.resX();
float y = (pos.y/(float)getWindowHeight())*mFluid2D.resY();
vec2 dv = pos - prevPos;
mFluid2D.splatVelocity( x, y, mVelScale*dv );
mFluid2D.splatRgb( x, y, mRgbScale*mTouchColors[cit->getId()] );
if( mFluid2D.isBuoyancyEnabled() ) {
mFluid2D.splatDensity( x, y, mDenScale );
}
for( int i = 0; i < 5; ++i ) {
vec2 partPos = pos + vec2( Rand::randFloat( -s, s ), Rand::randFloat( -s, s ) );
float life = Rand::randFloat( 3.0f, 6.0f );
mParticles.append( Particle( partPos, life, mTouchColors[cit->getId()] ) );
}
}
}
void Fluid2DCamAppApp::mouseDrag( MouseEvent event )
{
float x = (event.getX()/(float)getWindowWidth())*mFluid2D.resX();
float y = (event.getY()/(float)getWindowHeight())*mFluid2D.resY();
if( event.isLeftDown() ) {
Vec2f dv = event.getPos() - mPrevPos;
mFluid2D.splatVelocity( x, y, mVelScale*dv );
mFluid2D.splatDensity( x, y, mDenScale );
}
mPrevPos = event.getPos();
}
void Fluid2DBasicApp::touchesMoved( TouchEvent event )
{
const std::vector<TouchEvent::Touch>& touches = event.getTouches();
for( std::vector<TouchEvent::Touch>::const_iterator cit = touches.begin(); cit != touches.end(); ++cit ) {
Vec2f prevPos = cit->getPrevPos();
Vec2f pos = cit->getPos();
float x = (pos.x/(float)getWindowWidth())*mFluid2D.resX();
float y = (pos.y/(float)getWindowHeight())*mFluid2D.resY();
Vec2f dv = pos - prevPos;
mFluid2D.splatVelocity( x, y, mVelScale*dv );
mFluid2D.splatDensity( x, y, mDenScale );
}
}
void Fluid2DTextureApp::mouseDrag( MouseEvent event )
{
float x = (event.getX()/(float)getWindowWidth())*mFluid2D.resX();
float y = (event.getY()/(float)getWindowHeight())*mFluid2D.resY();
if( event.isLeftDown() ) {
vec2 dv = vec2( event.getPos() ) - mPrevPos;
mFluid2D.splatVelocity( x, y, mVelScale*dv );
if( mFluid2D.isBuoyancyEnabled() ) {
mFluid2D.splatDensity( x, y, mDenScale );
}
}
mPrevPos = event.getPos();
}
void Fluid2DParticleSoupApp::mouseDrag( MouseEvent event )
{
float x = (event.getX()/(float)getWindowWidth())*mFluid2D.resX();
float y = (event.getY()/(float)getWindowHeight())*mFluid2D.resY();
if( event.isLeftDown() ) {
Vec2f dv = event.getPos() - mPrevPos;
mFluid2D.splatVelocity( x, y, mVelScale*dv );
mFluid2D.splatRgb( x, y, mRgbScale*mColor );
if( mFluid2D.isBuoyancyEnabled() ) {
mFluid2D.splatDensity( x, y, mDenScale );
}
}
mPrevPos = event.getPos();
}
void Fluid2DParticleSoupApp::touchesMoved( TouchEvent event )
{
const std::vector<TouchEvent::Touch>& touches = event.getTouches();
for( std::vector<TouchEvent::Touch>::const_iterator cit = touches.begin(); cit != touches.end(); ++cit ) {
vec2 prevPos = cit->getPrevPos();
vec2 pos = cit->getPos();
float x = (pos.x/(float)getWindowWidth())*mFluid2D.resX();
float y = (pos.y/(float)getWindowHeight())*mFluid2D.resY();
vec2 dv = pos - prevPos;
mFluid2D.splatVelocity( x, y, mVelScale*dv );
mFluid2D.splatRgb( x, y, mRgbScale*mColor );
if( mFluid2D.isBuoyancyEnabled() ) {
mFluid2D.splatDensity( x, y, mDenScale );
}
}
}
void Fluid2DParticlesApp::mouseDrag( MouseEvent event )
{
float x = (event.getX()/(float)getWindowWidth())*mFluid2D.resX();
float y = (event.getY()/(float)getWindowHeight())*mFluid2D.resY();
float s = 10;
if( event.isLeftDown() ) {
vec2 dv = vec2( event.getPos() ) - mPrevPos;
mFluid2D.splatVelocity( x, y, mVelScale*dv );
mFluid2D.splatRgb( x, y, mRgbScale*mColor );
if( mFluid2D.isBuoyancyEnabled() ) {
mFluid2D.splatDensity( x, y, mDenScale );
}
//
for( int i = 0; i < 10; ++i ) {
vec2 partPos = vec2( event.getPos() ) + vec2( Rand::randFloat( -s, s ), Rand::randFloat( -s, s ) );
float life = Rand::randFloat( 2.0f, 4.0f );
mParticles.append( Particle( partPos, life, mColor ) );
}
}
mPrevPos = event.getPos();
}
void Fluid2DCamAppApp::update()
{
if( mCapture && mCapture.checkNewFrame() ) {
if( ! mTexCam ) {
mTexCam = gl::Texture( mCapture.getSurface() );
}
// Flip the image
if( ! mFlipped ) {
Surface8u srcImg = mCapture.getSurface();
mFlipped = Surface8u( srcImg.getWidth(), srcImg.getHeight(), srcImg.hasAlpha(), srcImg.getChannelOrder() );
}
Surface8u srcImg = mCapture.getSurface();
mFlipped = Surface8u( srcImg.getWidth(), srcImg.getHeight(), srcImg.hasAlpha(), srcImg.getChannelOrder() );
for( int y = 0; y < mCapture.getHeight(); ++y ) {
const Color8u* src = (const Color8u*)(srcImg.getData() + (y + 1)*srcImg.getRowBytes() - srcImg.getPixelInc());
Color8u* dst = (Color8u*)(mFlipped.getData() + y*mFlipped.getRowBytes());
for( int x = 0; x < mCapture.getWidth(); ++x ) {
*dst = *src;
++dst;
--src;
}
}
// Create scaled image
if( ! mCurScaled ) {
mCurScaled = Surface8u( mFlipped.getWidth()/kFlowScale, mFlipped.getHeight()/kFlowScale, mFlipped.hasAlpha(), mFlipped.getChannelOrder() );
}
ip::resize( mFlipped, &mCurScaled );
// Optical flow
if( mCurScaled && mPrvScaled ) {
mPrvCvData = mCurCvData;
mCurCvData = cv::Mat( toOcv( Channel( mCurScaled ) ) );
if( mPrvCvData.data && mCurCvData.data ) {
int pyrLvels = 3;
int winSize = 3;
int iters = 5;
int poly_n = 7;
double poly_sigma = 1.5;
cv::calcOpticalFlowFarneback( mPrvCvData, mCurCvData, mFlow, 0.5, pyrLvels, 2*winSize + 1, iters, poly_n, poly_sigma, cv::OPTFLOW_FARNEBACK_GAUSSIAN );
if( mFlow.data ) {
if( mFlowVectors.empty() ) {
mFlowVectors.resize( mCurScaled.getWidth()*mCurScaled.getHeight() );
}
//memset( &mFlowVectors[0], 0, mCurScaled.getWidth()*mCurScaled.getHeight()*sizeof( Vec2f ) );
mNumActiveFlowVectors = 0;
for( int j = 0; j < mCurScaled.getHeight(); ++j ) {
for( int i = 0; i < mCurScaled.getWidth(); ++i ) {
const float* fptr = reinterpret_cast<float*>(mFlow.data + j*mFlow.step + i*sizeof(float)*2);
//
Vec2f v = Vec2f( fptr[0], fptr[1] );
if( v.lengthSquared() >= mVelThreshold ) {
if( mNumActiveFlowVectors >= (int)mFlowVectors.size() ) {
mFlowVectors.push_back( std::make_pair( Vec2i( i, j ), v ) );
}
else {
mFlowVectors[mNumActiveFlowVectors] = std::make_pair( Vec2i( i, j ), v );
}
++mNumActiveFlowVectors;
}
}
}
}
}
}
// Update texture
mTexCam.update( mFlipped );
// Save previous frame
if( ! mPrvScaled ) {
mPrvScaled = Surface8u( mCurScaled.getWidth(), mCurScaled.getHeight(), mCurScaled.hasAlpha(), mCurScaled.getChannelOrder() );
}
memcpy( mPrvScaled.getData(), mCurScaled.getData(), mCurScaled.getHeight()*mCurScaled.getRowBytes() );
}
// Update fluid
float dx = (mFluid2DResX - 2)/(float)(640/kFlowScale);
float dy = (mFluid2DResY - 2)/(float)(480/kFlowScale);
for( int i = 0; i < mNumActiveFlowVectors; ++i ) {
Vec2f P = mFlowVectors[i].first;
const Vec2f& v = mFlowVectors[i].second;
mFluid2D.splatDensity( P.x*dx + 1, P.y*dy + 1, mDenScale*v.lengthSquared() );
mFluid2D.splatVelocity( P.x*dx + 1, P.y*dy + 1, v*mVelScale );
}
mFluid2D.step();
// Update velocity
const Vec2f* srcVel0 = mFluid2D.dbgVel0().data();
const Vec2f* srcVel1 = mFluid2D.dbgVel1().data();
Colorf* dstVel0 = (Colorf*)mSurfVel0.getData();
Colorf* dstVel1 = (Colorf*)mSurfVel1.getData();
for( int j = 0; j < mFluid2DResY; ++j ) {
for( int i = 0; i < mFluid2DResX; ++i ) {
*dstVel0 = Colorf( srcVel0->x, srcVel0->y, 0.0f );
*dstVel1 = Colorf( srcVel1->x, srcVel1->y, 0.0f );
++srcVel0;
++srcVel1;
++dstVel0;
++dstVel1;
}
}
// Update Density
mChanDen0 = Channel32f( mFluid2DResX, mFluid2DResY, mFluid2DResX*sizeof(float), 1, mFluid2D.dbgDen0().data() );
mChanDen1 = Channel32f( mFluid2DResX, mFluid2DResY, mFluid2DResX*sizeof(float), 1, mFluid2D.dbgDen1().data() );
mTexDen0.update( mChanDen0 );
mTexDen1.update( mChanDen1 );
// Update velocity textures
mTexVel0.update( mSurfVel0 );
mTexVel1.update( mSurfVel1 );
// Update Divergence
mChanDiv = Channel32f( mFluid2DResX, mFluid2DResY, mFluid2DResX*sizeof(float), 1, mFluid2D.dbgDivergence().data() );
mTexDiv.update( mChanDiv );
// Update Divergence
mChanPrs = Channel32f( mFluid2DResX, mFluid2DResY, mFluid2DResX*sizeof(float), 1, mFluid2D.dbgPressure().data() );
mTexPrs.update( mChanPrs );
// Update Curl, Curl Length
mChanCurl = Channel32f( mFluid2DResX, mFluid2DResY, mFluid2DResX*sizeof(float), 1, mFluid2D.dbgCurl().data() );
mTexCurl.update( mChanCurl );
mChanCurlLen = Channel32f( mFluid2DResX, mFluid2DResY, mFluid2DResX*sizeof(float), 1, mFluid2D.dbgCurlLength().data() );
mTexCurlLen.update( mChanCurlLen );
}