void Particle::update( const Channel32f &channel, const ci::Channel32f &rChan, const ci::Channel32f &gChan, const ci::Channel32f &bChan, const ci::Vec2i &mouseLoc )
{
//calculate the vector that points from the particl to the mouse.
mDirToCursor = mouseLoc - mLoc;
mDirToCursor.safeNormalize(); //normalize it so it gives us a unit vector.
Vec2f newLoc = mLoc + mDirToCursor * 100.f;
newLoc.x = constrain( newLoc.x, 0.0f, channel.getWidth() - 1.0f );
newLoc.y = constrain( newLoc.y, 0.0f, channel.getHeight() - 1.0f );
//mRadius = channel.getValue( mLoc ) * mScale;
mRadius = channel.getValue( newLoc ) * mScale;
Vec2i mLoci = (Vec2i) mLoc;
r = rChan.getValue( newLoc );
g = gChan.getValue( newLoc );
b = bChan.getValue( newLoc );
//console() << r << ", " << g << ", " << b << std::endl;
//console() << channel.getValue(mLoc) << std::endl;
//console() << "hello" << std::endl;
}
Texture::Texture( const Channel32f &channel, Format format )
: mObj( shared_ptr<Obj>( new Obj( channel.getWidth(), channel.getHeight() ) ) )
{
#if defined( CINDER_MAC )
bool supportsTextureFloat = gl::isExtensionAvailable( "GL_ARB_texture_float" );
#elif defined( CINDER_MSW )
bool supportsTextureFloat = GLEE_ARB_texture_float != 0;
#endif
if( format.mInternalFormat < 0 ) {
#if ! defined( CINDER_GLES )
if( supportsTextureFloat )
format.mInternalFormat = GL_LUMINANCE32F_ARB;
else
format.mInternalFormat = GL_LUMINANCE;
#else
format.mInternalFormat = GL_LUMINANCE;
#endif
}
mObj->mInternalFormat = format.mInternalFormat;
mObj->mTarget = format.mTarget;
// if the data is not already contiguous, we'll need to create a block of memory that is
if( ( channel.getIncrement() != 1 ) || ( channel.getRowBytes() != channel.getWidth() * sizeof(float) ) ) {
shared_ptr<float> data( new float[channel.getWidth() * channel.getHeight()], checked_array_deleter<float>() );
float *dest = data.get();
const int8_t inc = channel.getIncrement();
const int32_t width = channel.getWidth();
for( int y = 0; y < channel.getHeight(); ++y ) {
const float *src = channel.getData( 0, y );
for( int x = 0; x < width; ++x ) {
*dest++ = *src;
src += inc;
}
}
init( data.get(), GL_LUMINANCE, format );
}
else
init( channel.getData(), GL_LUMINANCE, format );
}
void DirVector::update(const Channel32f &channel, const Vec2f &windDirection){
//console() << "Update1: << " << mDir << ", " << mRotationVector << endl;
//mDir = Vec2f(1.0f, 0.0f);
mDir = mRotationVector; //mouseLoc - mLoc;
mDir.safeNormalize();
//mDir.normalize();
Vec2f newLoc = mLoc + mDir * 100.f;
newLoc.x = constrain(newLoc.x, 0.f, channel.getWidth() - 1.f);
newLoc.x = constrain(newLoc.x, 0.f, channel.getHeight() - 1.f);
mRadius = channel.getValue(newLoc) * 7.0f;
//console() << "Update2: << " << mDir << endl;
}
void Particle::update( const Channel32f &channel, const Vec2i &mouseLoc )
{
mDirToCursor = mouseLoc - mLoc;
float distToCursor = mDirToCursor.length();
float time = app::getElapsedSeconds();
float dist = distToCursor * 0.025f;
float sinOffset = sin( dist - time ) + 1.0f;
mDirToCursor.normalize();
mDirToCursor *= sinOffset * 100.0f;
Rectf rect( mLoc.x, mLoc.y, mLoc.x + mRadius, mLoc.y + mRadius );
gl::drawSolidRect( rect );
Vec2f newLoc = mLoc + mDirToCursor;
newLoc.x = constrain( newLoc.x, 0.0f, channel.getWidth() - 1.0f );
newLoc.y = constrain( newLoc.y, 0.0f, channel.getHeight() - 1.0f );
mRadius = channel.getValue( newLoc ) * mScale;
}
void Circle::update(const Vec2i &mouseLoc, const Channel32f &channel)
{
mMouseLoc = mouseLoc;
mDirToCursor = mMouseLoc-mLoc;
float distToCursor = mDirToCursor.length();
float time = app::getElapsedSeconds();
float dist = distToCursor * 0.025f;
float sinOffset = sin(dist-time)+1.0f;
mDirToCursor.normalize();
mDirToCursor *= sinOffset * 100.0f;
Vec2f newLoc = mLoc+mDirToCursor;
newLoc.x = constrain(newLoc.x, 0.0f, channel.getWidth()-1.0f);
newLoc.y = constrain(newLoc.y, 0.0f, channel.getHeight() - 1.0f);
mRadius = channel.getValue(newLoc)*mScale+2.0f;
float gray=channel.getValue(mLoc);
mColor=Color(gray,gray,gray);
}
