/usr/share/radiance/mat3.cal is in radiance-materials 4R0+20110410-1build1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 | { RCSid $Id: mat3.cal,v 1.2 2009/03/24 01:41:40 greg Exp $ }
{
3x3 Matrix operations
}
MatDot(A,B,i,j) : A(i,0)*B(0,j) + A(i,1)*B(1,j) + A(i,2)*B(2,j);
MatDotVec(A,v,i) : A(i,0)*v(0) + A(i,1)*v(1) + A(i,2)*v(2);
i3(i) : if(i-2.5, i-3, i);
MinorDet(M,i,j) : M(i3(i+1),i3(j+1))*M(i3(i+2),i3(j+2)) -
M(i3(i+1),i3(j+2))*M(i3(i+2),i3(j+1));
Det(M) : M(0,0)*MinorDet(M,0,0) +
M(0,1)*MinorDet(M,0,1) +
M(0,2)*MinorDet(M,0,2);
Inv(M,i,j) : MinorDet(M,j,i) / Det(M);
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