void BookAR::updateData(const ci::Surface32f& image, gl::VboMesh& mesh, float max_height)
{
uint32_t book_w = image.getWidth();
uint32_t book_h = image.getHeight();
if (!mesh || mesh.getNumVertices() != book_w * book_h)
{//needs refresh
gl::VboMesh::Layout layout;
layout.setDynamicColorsRGB();
layout.setDynamicPositions();
_mesh_book = gl::VboMesh( book_w * book_h, 0, layout, GL_POINTS );
}
Surface32f::ConstIter pixelIter = image.getIter();
gl::VboMesh::VertexIter vertexIter( mesh );
while( pixelIter.line() ) {
while( pixelIter.pixel() ) {
Color color( pixelIter.r(), pixelIter.g(), pixelIter.b() );
float height = color.dot( Color( 0.3333f, 0.3333f, 0.3333f ) );
// the x and the z coordinates correspond to the pixel's x & y
float x = pixelIter.x() - book_h / 2.0f;
float z = pixelIter.y() - book_h / 2.0f;
vertexIter.setPosition( x, height * max_height, z );
vertexIter.setColorRGB( color );
++vertexIter;
}
}
}
void HexagonMirrorApp::drawInstanced( const gl::VboMesh &vbo, size_t instanceCount )
{
if( vbo.getNumIndices() > 0 )
drawRangeInstanced( vbo, (size_t)0, vbo.getNumIndices(), instanceCount );
else
drawArraysInstanced( vbo, 0, vbo.getNumVertices(), instanceCount );
}
void cApp::update(){
if( !bStart )
return;
gl::VboMesh::VertexIter vitr( mPoints );
for(int i=0; i<mPoints.getNumVertices(); i++ ){
Vec3f &pos = ps[i];
int x = pos.x;
int y = pos.y;
x = cinder::math<int>::clamp( x, 0, intensityW-1 );
y = cinder::math<int>::clamp( y, 0, intensityH-1 );
Vec3f vel( mVecMap[x][y].x, mVecMap[x][y].y, 0);
Vec3f noise = mPln.dfBm(x, y, cs[i].a ) * 0.2;
mVelocity[i] = mVelocity[i] + (vel + noise);
vitr.setPosition( pos + mVelocity[i] );
vitr.setColorRGBA( cs[i] );
++vitr;
}
}