protected unsafe void Redraw()
{
int PhiD = integerTrackbarControlPhiD.Value;
double Gamma = 1.0 / floatTrackbarControlGamma.Value;
double Exposure = Math.Pow( 2.0, floatTrackbarControlExposure.Value );
bool bShowDifferences = checkBoxDifferences.Checked;
bool bUseWarping = checkBoxUseWarping.Checked;
double Warp = floatTrackbarControlWarpFactor.Value;
byte R, G, B;
Vector3 Temp = new Vector3(), Temp2;
BitmapData LockedBitmap = m_Slice.LockBits( new Rectangle( 0, 0, m_Slice.Width, m_Slice.Height ), ImageLockMode.WriteOnly, PixelFormat.Format32bppArgb );
for ( int Y=0; Y < 90; Y++ )
{
int ThetaD = 89 - Y;
byte* pScanline = (byte*) LockedBitmap.Scan0.ToPointer() + Y * LockedBitmap.Stride;
for ( int X=0; X < 90; X++ )
{
if ( !bUseWarping )
{
int ThetaH = (int) (89 * Math.Sqrt( X/89.0 )); // Square ThetaH
Temp = m_BRDF[ThetaH,ThetaD,PhiD];
if ( !bShowDifferences )
{
Temp.x = Math.Pow( Exposure * Temp.x, Gamma );
Temp.y = Math.Pow( Exposure * Temp.y, Gamma );
Temp.z = Math.Pow( Exposure * Temp.z, Gamma );
}
else
{
Temp2 = m_BRDF[ThetaH,ThetaD,Math.Min( 179, 179-PhiD )]; // Read from symetrical slice
Temp.x = 64.0 * Exposure * Math.Abs( Temp.x - Temp2.x );
Temp.y = 64.0 * Exposure * Math.Abs( Temp.y - Temp2.y );
Temp.z = 64.0 * Exposure * Math.Abs( Temp.z - Temp2.z );
}
}
else
{ // Use slice warping !
int ThetaH = X; // Don't square ThetaH just yet!
// WarpSlice( ThetaH, ThetaD, Warp, ref Temp );
WarpSlice( ThetaH, ThetaD, PhiD, ref Temp );
if ( !bShowDifferences )
{
Temp.x = Math.Pow( Exposure * Temp.x, Gamma );
Temp.y = Math.Pow( Exposure * Temp.y, Gamma );
Temp.z = Math.Pow( Exposure * Temp.z, Gamma );
}
else
{
ThetaH = (int) (89 * Math.Sqrt( X/89.0 )); // Square ThetaH
Temp2 = m_BRDF[ThetaH,ThetaD,PhiD];
Temp2.x = Math.Max( 0.0, Temp2.x );
Temp2.y = Math.Max( 0.0, Temp2.y );
Temp2.z = Math.Max( 0.0, Temp2.z );
Temp.x = 10.0 * Exposure * Math.Abs( Temp.x - Temp2.x );
Temp.y = 10.0 * Exposure * Math.Abs( Temp.y - Temp2.y );
Temp.z = 10.0 * Exposure * Math.Abs( Temp.z - Temp2.z );
}
}
R = (byte) Math.Max( 0, Math.Min( 255, 255.0 * Temp.x ) );
G = (byte) Math.Max( 0, Math.Min( 255, 255.0 * Temp.y ) );
B = (byte) Math.Max( 0, Math.Min( 255, 255.0 * Temp.z ) );
*pScanline++ = B;
*pScanline++ = G;
*pScanline++ = R;
*pScanline++ = 0xFF;
}
}
m_Slice.UnlockBits( LockedBitmap );
// if ( checkBoxShowIsolines.Checked )
// {
// PointF P0 = new PointF(), P1 = new PointF();
//
// using ( Graphics Graph = Graphics.FromImage( m_Slice ) )
// {
// double ThetaHalf, PhiHalf, ThetaDiff, PhiDiff;
// double ThetaHalfN, PhiHalfN, ThetaDiffN, PhiDiffN;
// for ( int IsolineIndex=0; IsolineIndex < 8; IsolineIndex++ )
// {
// double Angle = (1+IsolineIndex) * 0.49 * Math.PI / 8;
// // double Angle = 0.25 * Math.PI;
//
// for ( int i=0; i < 40; i++ )
// {
// double Phi = i * Math.PI / 40;
// std_coords_to_half_diff_coords( Angle, 0, Angle, Phi, out ThetaHalf, out PhiHalf, out ThetaDiff, out PhiDiff );
//
// Phi = (i+1) * Math.PI / 40;
// std_coords_to_half_diff_coords( Angle, 0, Angle, Phi, out ThetaHalfN, out PhiHalfN, out ThetaDiffN, out PhiDiffN );
//
// P0.X = (float) (m_Slice.Width * ThetaHalf * 0.63661977236758134307553505349006); // divided by PI/2
// P0.Y = (float) (m_Slice.Height * (1.0f - ThetaDiff * 0.63661977236758134307553505349006)); // divided by PI/2
// P1.X = (float) (m_Slice.Width * ThetaHalfN * 0.63661977236758134307553505349006); // divided by PI/2
// P1.Y = (float) (m_Slice.Height * (1.0f - ThetaDiffN * 0.63661977236758134307553505349006)); // divided by PI/2
// Graph.DrawLine( m_Pen, P0, P1 );
// }
// }
// }
// }
panelDisplay.ShowIsoLines = checkBoxShowIsolines.Checked;
panelDisplay.PhiD = Math.PI * PhiD / 180.0;
panelDisplay.Slice = m_Slice; // Will trigger update
}
