Christian Rau
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 Feb 26 asked Dihedral angles between tetrahedron faces from triangles' angles at the tip Feb 22 answered Determine the percentage needed to subtract to get the base value Feb 10 answered Simplest equation for drawing a cube based on its center and/or other vertices Feb 8 answered Relationship between nullspace and row/column space Feb 3 answered (Graphics Gems IV, Shoemake) From matrix to euler angles explanation Feb 3 answered Is there a classic Matrix Algebra reference? Feb 3 answered 3D Rotation Matrix Uniqueness Feb 3 answered How to get a projected 3d line segment, lie on another 3d line parallel to that line segment. Feb 1 answered Multiplying double-centered matrix to a unit vector Jan 30 answered Generating orthogonal axes on a spline Jan 27 answered Finding the radius of a particular center voxel in 3D cylinder-like structure Jan 18 answered Orthogonal matrices, scalar products, projection of a line on a plane Jan 17 answered Divide a Set of Points along a Direction Dec 8 asked Matrices for which $\mathbf{A}^{-1}=-\mathbf{A}$ Sep 13 answered Optimizing Cholesky factorization for multiple sparse matrices with same nonzero pattern Sep 13 answered Jacobian matrix of the Rodrigues' formula (exponential map) Sep 2 answered Orthogonal matrix over cross product Aug 31 answered How to calculate the x/y coordinate of F in this diagram (geometry) Aug 29 answered Quaternion for an object that to point in a direction Aug 25 answered The Euclidean norm ||r|| of a rotation