AUTOMAP |
THE BOX'S MAIN HELP: This function uses the normal to the surface to do a planar projection. The projection is performed with (UU,VV) equal to (0,0) at the point O. UU runs along the vector specified by Y and VV runs along the vector perpendicular to both Y and the normal to the surface. For surfaces which are perpendicular to Y, a reasonable guess at "up" is attempted. N.B.: this only works well on faceted surfaces (polygonal or bilinear). PP (input): This is the point on surface to be projected. The default is P. O (input): This point represents the origin of the plane. This must be a point. The default is point(0,0,0). Y (input): This point represents the Yaxis of the plane. This must be a point. The default is point(0,1,0). N (input): This point is the surface normal of the surface to be projected. This must be a point. The default is N. UU (output): This a return value, the "horizontal" mapping coordinate. This function uses the normal to the surface to do a planar projection. The projection is performed with (UU,VV) equal to (0,0) at the point O. UU runs along the vector specified by Y and VV runs along the vector perpendicular to both Y and the normal to the surface. For surfaces which are perpendicular to Y, a reasonable guess at "up" is attempted. N.B.: this only works well on faceted surfaces (polygonal or bilinear). VV (output): This a return value, the "vertical" mapping coordinate. This function uses the normal to the surface to do a planar projection. The projection is performed with (UU,VV) equal to (0,0) at the point O. UU runs along the vector specified by Y and VV runs along the vector perpendicular to both Y and the normal to the surface. For surfaces which are perpendicular to Y, a reasonable guess at "up" is attempted. N.B.: this only works well on faceted surfaces (polygonal or bilinear). |
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