void Renderer2dApp::draw()
{
// Render using CoreGraphics on the mac
#if defined( CINDER_COCOA )
CGContextRef context = cocoa::getWindowContext();
CGColorSpaceRef baseSpace = CGColorSpaceCreateDeviceRGB();
CGFloat colors[8] = { 0, 0, 0, 1, 0.866, 0.866, 0.866, 1 };
CGGradientRef gradient = CGGradientCreateWithColorComponents( baseSpace, colors, NULL, 2 );
::CGColorSpaceRelease( baseSpace ), baseSpace = NULL;
::CGContextDrawLinearGradient( context, gradient, CGPointMake( 0, 0 ), CGPointMake( 0, getWindowHeight() ), 0 );
::CGGradientRelease(gradient), gradient = NULL;
// CoreGraphics is "upside down" by default; setup CTM to flip and center it
ivec2 imgSize( ::CGImageGetWidth( mImage ), ::CGImageGetHeight( mImage ) );
ivec2 centerMargin( ( getWindowWidth() - imgSize.x ) / 2, ( getWindowHeight() - imgSize.y ) / 2 );
::CGContextTranslateCTM( context, centerMargin.x, imgSize.y + centerMargin.y );
::CGContextScaleCTM( context, 1.0, -1.0 );
::CGContextDrawImage( context, CGRectMake( 0, 0, imgSize.x, imgSize.y ), mImage );
#elif defined( CINDER_MSW ) // Render using GDI+ on Windows
Gdiplus::Graphics graphics( getWindow()->getDc() );
Gdiplus::LinearGradientBrush brush( Gdiplus::Rect( 0, 0, getWindowWidth(), getWindowHeight() ),
Gdiplus::Color( 0, 0, 0 ), Gdiplus::Color( 220, 220, 220 ), Gdiplus::LinearGradientModeVertical );
graphics.FillRectangle( &brush, 0, 0, getWindowWidth(), getWindowHeight() );
graphics.DrawImage( mImage, ( getWindowWidth() - mImageSurface.getWidth() ) / 2, ( getWindowHeight() - mImageSurface.getHeight() ) / 2,
mImageSurface.getWidth(), mImageSurface.getHeight() );
#endif
}
void ocvPerspectiveApp::updateImage()
{
cv::Mat input( toOcv( mInputImage ) ), output;
cv::Point2f src[4];
src[0] = cv::Point2f( 0, 0 );
src[1] = cv::Point2f( mInputImage.getWidth(), 0 );
src[2] = cv::Point2f( mInputImage.getWidth(), mInputImage.getHeight() );
src[3] = cv::Point2f( 0, mInputImage.getHeight() );
cv::Point2f dst[4];
for( int i = 0; i < 4; ++i )
dst[i] = toOcv( mPoints[i] );
cv::Mat warpMatrix = cv::getPerspectiveTransform( src, dst );
cv::warpPerspective( input, output, warpMatrix, toOcv( getWindowSize() ), cv::INTER_CUBIC );
mTexture = gl::Texture( fromOcv( output ) );
}
Texture::Texture( const Surface8u &surface, Format format )
: mObj( shared_ptr<Obj>( new Obj( surface.getWidth(), surface.getHeight() ) ) )
{
if( format.mInternalFormat < 0 )
format.mInternalFormat = surface.hasAlpha() ? GL_RGBA : GL_RGB;
mObj->mInternalFormat = format.mInternalFormat;
mObj->mTarget = format.mTarget;
GLint dataFormat;
GLenum type;
SurfaceChannelOrderToDataFormatAndType( surface.getChannelOrder(), &dataFormat, &type );
init( surface.getData(), surface.getRowBytes() / surface.getChannelOrder().getPixelInc(), dataFormat, type, format );
}
void Kinect::pixelToVideoSurface( Surface8u &surface, uint8_t *buffer )
{
if ( mNewVideoFrame ) {
return;
}
int32_t height = surface.getHeight();
int32_t width = surface.getWidth();
int32_t size = width * height * 4;
// Swap red/blue channels
for ( int32_t i = 0; i < size; i += 4 ) {
uint8_t b = buffer[ i ];
buffer[ i ] = buffer[ i + 2 ];
buffer[ i + 2 ] = b;
}
memcpy( surface.getData(), buffer, size );
mNewVideoFrame = true;
}
void cApp::setup(){
mPln.setSeed( 345 );
mPln.setOctaves( 4 );
openDir();
fs::path path = dir/("f_00000.png");
sur = Surface8u( loadImage( path) );
int w = sur.getWidth();
int h = sur.getHeight();
pcam = CameraPersp(w, h, 50, 1, 10000);
camUi.setCamera( &pcam );
mExp.setup( w, h, 0, 3000-1, GL_RGB, mt::getRenderPath(), 0 );
setWindowSize( w*0.5, h*0.5 );
setWindowPos(0, 0);
#ifdef RENDER
mExp.startRender();
#endif
}
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 );
}
TextureCache::Obj::Obj( const Surface8u &prototypeSurface, const Texture::Format &format )
: mWidth( prototypeSurface.getWidth() ), mHeight( prototypeSurface.getHeight() ), mFormat( format ), mNextId( 0 )
{
}
