void ImageHFApp::updateData( ImageHFApp::ColorSwitch whichColor )
{
Surface32f::Iter pixelIter = mImage.getIter();
auto vertPosIter = mVboMesh->mapAttrib3f( geom::POSITION );
auto vertColorIter = mVboMesh->mapAttrib3f( geom::COLOR );
while( pixelIter.line() ) {
while( pixelIter.pixel() ) {
Color color( pixelIter.r(), pixelIter.g(), pixelIter.b() );
float height;
const float muteColor = 0.2f;
// calculate the height based on a weighted average of the RGB, and emphasize either the red green or blue color in each of those modes
switch( whichColor ) {
case kColor:
height = color.dot( Color( 0.3333f, 0.3333f, 0.3333f ) );
break;
case kRed:
height = color.dot( Color( 1, 0, 0 ) );
color *= Color( 1, muteColor, muteColor );
break;
case kGreen:
height = color.dot( Color( 0, 1, 0 ) );
color *= Color( muteColor, 1, muteColor );
break;
case kBlue:
height = color.dot( Color( 0, 0, 1 ) );
color *= Color( muteColor, muteColor, 1 );
break;
}
// the x and the z coordinates correspond to the pixel's x & y
float x = pixelIter.x() - mWidth / 2.0f;
float z = pixelIter.y() - mHeight / 2.0f;
*vertPosIter++ = vec3( x, height * 30.0f, z );
*vertColorIter++ = vec3( color.r, color.g, color.b );
}
}
vertPosIter.unmap();
vertColorIter.unmap();
}
void FiretrailApp::update()
{
const auto ray = mCamera.generateRay(getMousePos() - getWindowPos(), getWindowSize());
float result = .0f;
ray.calcPlaneIntersection(vec3(.0f, .0f, 5.0f), vec3(.0f, -2.0f, 1.0f), &result);
mHeadPosition += (ray.calcPosition(result) - mHeadPosition) * .8f;
mSpline.pushPoint(mHeadPosition);
const auto length = mSpline.getLength();
if (length <= .0f) return;
auto mappedPosAttrib = mVboMesh->mapAttrib3f( geom::POSITION );
const auto d = min(mMaxDSlice, length / (float)NUM_SPLINE_NODES);
for (size_t i = 0; i < NUM_SPLINE_NODES; ++i)
{
*mappedPosAttrib++ = mSpline.positionAtLength(d * i);
}
mappedPosAttrib.unmap();
mFps = getAverageFps();
if (mRecordingMovie)
{
if( mMovieExporter && getElapsedFrames() > 1 && getElapsedFrames() < MAX_MOVIE_FRAMES )
{
mMovieExporter->addFrame( copyWindowSurface() );
}
else if( mMovieExporter && getElapsedFrames() >= MAX_MOVIE_FRAMES )
{
endMovieRecording();
}
}
}