Stacho Mudrak wrote: > > There was no traffic in the mailing list, so I was worried, that all > the people that tried therion are disappointed with it.
Or perhaps we're all away surveying new caves, rather than drawing them up ;-) I've just got back from a month on expedition, and as soon I've caught up with work will be scanning in some new scraps... > Wookey wrote: > >> Colour scrap by altitude is nice but the abrubt joins can look >> nasty in the middle of wide, nominally horizontal passage. It >> works really well in the 'soundriver' area where there are >> nicely-merging shades of green, but nastily in other some other >> areas. Some way to graduate the join a bit would make it look a lot >> nicer. Or apply more detailed colour control to a scrap like >> 'nearly the same as neighbour scrapname'. > > > This I have to discuss with MartinB. As far as I know PDF - some > gradient colorings are possible, but only for triangles. Not for > bezier curves. So in principle, there are two possibilities: I thought that the PDF spec provided considerable flexability in the shadings, and it seems that it does. From the Fourth edition of the PDF reference, page 267 (avalable from: http://partners.adobe.com/public/developer/en/pdf/PDFReference15_v5.pdf .) ------------ Various shading types are available, depending on the value of the dictionaryâs ShadingType entry: ⢠Function-based shadings (type 1) define the color of every point in the domain using a mathematical function (not necessarily smooth or continuous). ⢠Axial shadings (type 2) define a color blend along a line between two points, optionally extended beyond the boundary points by continuing the boundary colors. ⢠Radial shadings (type 3) define a blend between two circles, optionally extended beyond the boundary circles by continuing the boundary colors. This type of shading is commonly used to represent three-dimensional spheres and cones. ⢠Free-form Gouraud-shaded triangle meshes (type 4) define a common construct used by many three-dimensional applications to represent complex colored and shaded shapes. Vertices are specified in free-form geometry. ⢠Lattice-form Gouraud-shaded triangle meshes (type 5) are based on the same geometrical construct as type 4, but with vertices specified as a pseudorectangular lattice. ⢠Coons patch meshes (type 6) construct a shading from one or more color patches, each bounded by four cubic Bézier curves. ⢠Tensor-product patch meshes (type 7) are similar to type 6, but with additional control points in each patch, affording greater control over color mapping. ------------ But a simple linear gradient across the join points of two scraps with different colours would give a big improvement. Cheers, John
