모션벡터 쉐이더

픽사포럼에서 발견...

이번 게임동영상 프로젝트를 하면서 필요했던 쉐이더.

surface reelSmartMotionBlur(
uniform float MaxDisplace = 32;

// I don't need float option...


) {
// Get blur vector on image plane in pixels
point rasterP = transform( "raster", P );
point rasterPdPdtime = transform( "raster", P + dPdtime );
vector pixelsMoved = rasterPdPdtime - rasterP;
pixelsMoved *= vector( 1, -1, 0 ); // Revert y-axis

// Original lm2dmv - r->r = (miScalar)( (-v_rMVx/v_dMVNorm) + 1.0f )*0.5f

pixelsMoved = .5 * ( -pixelsMoved / MaxDisplace + 1 );


Oi = 1;
Ci = color( pixelsMoved );

// We dont need blue channel - rsmv takes onlu r, g;

Ci *=color (1,1,0);
}