Method draw

samples/BezierPath/src/BezierPathApp.cpp:95–125

}

void Path2dApp::draw()
{
	gl::clear( Color( 0.0f, 0.1f, 0.2f ) );
	
	// draw the control points
	gl::color( Color( 1, 1, 0 ) );
	for( size_t p = 0; p < mPath.getNumPoints(); ++p )
		gl::drawSolidCircle( mPath.getPoint( p ), 2.5f );

	// draw the precise bounding box
	if( mPath.getNumSegments() > 1 ) {
		gl::color( ColorA( 0, 1, 1, 0.2f ) );
		gl::drawSolidRect( mPath.calcPreciseBoundingBox() );
	}

	// draw the curve itself
	gl::color( Color( 1.0f, 0.5f, 0.25f ) );
	gl::draw( mPath );
	
	if( mPath.getNumSegments() > 1 ) {	
		// draw some tangents
		gl::color( Color( 0.2f, 0.9f, 0.2f ) );	
		for( float t = 0; t < 1; t += 0.2f )
			gl::drawLine( mPath.getPosition( t ), mPath.getPosition( t ) + normalize( mPath.getTangent( t ) ) * 80.0f );
		
		// draw circles at 1/4, 2/4 and 3/4 the length
		gl::color( ColorA( 0.2f, 0.9f, 0.9f, 0.5f ) );
		for( float t = 0.25f; t < 1.0f; t += 0.25f )
			gl::drawSolidCircle( mPath.getPosition( mPath.calcNormalizedTime( t ) ), 5.0f );
	}
}


CINDER_APP( Path2dApp, RendererGl )