private void DrawBitmap( int Width, int Height )
{
// Determine the first rectangle's orientation and dimensions.
double phi = ( 1 + Math.Sqrt( 5 ) ) / 2;
RectOrientations orientation;
int client_wid = Width;
int client_hgt = Height;
double wid, hgt; // The rectangle's size.
if ( client_wid > client_hgt ) {
// Horizontal rectangle.
orientation = RectOrientations.RemoveLeft;
if ( client_wid / ( double )client_hgt > phi ) {
hgt = client_hgt;
wid = hgt * phi;
} else {
wid = client_wid;
hgt = wid / phi;
}
} else {
// Vertical rectangle.
orientation = RectOrientations.RemoveTop;
if ( client_hgt / ( double )client_wid > phi ) {
wid = client_wid;
hgt = wid * phi;
} else {
hgt = client_hgt;
wid = hgt / phi;
}
}
// Allow a margin.
wid *= 0.9f;
hgt *= 0.9f;
// Center it.
double x = ( client_wid - wid ) / 2;
double y = ( client_hgt - hgt ) / 2;
// Make the Bitmap.
Bitmap bm = new Bitmap( client_wid, client_hgt );
{
// Draw the rectangles.
using ( Graphics gr = Graphics.FromImage( bm ) ) {
gr.FillRectangle( Brushes.White, 0, 0, bm.Width, bm.Height );
// Draw the rectangles.
gr.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
List<PointF> points = new List<PointF>();
DrawPhiRectanglesOnGraphics(points, x, y, wid, hgt, orientation );
// Draw the true spiral.
PointF start = points[0];
PointF origin = points[points.Count - 1];
float dx = start.X - origin.X;
float dy = start.Y - origin.Y;
double radius = Math.Sqrt( dx * dx + dy * dy );
double theta = Math.Atan2( dy, dx );
const int num_slices = 1000;
double dtheta = Math.PI / 2 / num_slices;
double factor = 1 - ( 1 / phi ) / num_slices * 0.78; //@
List<PointF> new_points = new List<PointF>();
// Repeat until dist is too small to see.
while ( radius > 0.1 ) {
PointF new_point = new PointF(
( float )( origin.X + radius * Math.Cos( theta ) ),
( float )( origin.Y + radius * Math.Sin( theta ) ) );
new_points.Add( new_point );
theta += dtheta;
radius *= factor;
}
gr.DrawLines( Pens.Blue, new_points.ToArray() );
}
bm = Crop( bm );
bm.RotateFlip( RotateFlipType.Rotate180FlipX );
Draw( bm );
bm.Dispose();
}
}
