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Two grease pencils Historical diplomatic usage The grease pencil , a wax writing tool also known as a wax pencil , china marker , or chinagraph pencil (especially in the United Kingdom ), is a writing implement made of hardened colored wax and is useful for marking on hard, glossy non-porous surfaces.
Using a black Royal Sovereign Chinagraph pencil I am exploring methods of blending, spreading, removing and fixing the black marks on paper, for artwork sketching and drawing. The black marks can be removed easily by washing in cold soapy water. That is not what would be expected from a wax, but is typical of an oil or grease I believe.
Blender's keyframed animation capabilities include inverse kinematics, armatures, hooks, curve- and lattice-based deformations, shape keys, non-linear animation, constraints, and vertex weighting. In addition, its Grease Pencil tools allow for 2D animation within a full 3D pipeline.
The geometry of a single bicubic patch is thus completely defined by a set of 16 control points. These are typically linked up to form a B-spline surface in a similar way as Bézier curves are linked up to form a B-spline curve. Simpler Bézier surfaces are formed from biquadratic patches (m = n = 2), or Bézier triangles.
Stability of residue curves in the vicinity of binary azeotropes. Pure components and azeotropic points are called nodes. Three different types are possible: Stable node: This is the pure component or the azeotropic point with the highest boiling temperature and lowest vapor pressure in a distillation region. All residue curves end at stable nodes.
A crunode at the origin of the curve defined by (+) =. In mathematics, a crunode [1] (archaic; from Latin crux "cross" + node [2]) or node of an algebraic curve is a type of singular point at which the curve intersects itself so that both branches of the curve have distinct tangent lines at the point of intersection.
The earliest work was so-called "butterfly scheme" by Dyn, Levin and Gregory (1990), who extended the four-point interpolatory subdivision scheme for curves to a subdivision scheme for surface. Zorin, Schröder and Sweldens (1996) noticed that the butterfly scheme cannot generate smooth surfaces for irregular triangle meshes and thus modified ...
The winding number of an oriented curve in the x-y plane is equal to its linking number with the z-axis (thinking of the z-axis as a closed curve in the 3-sphere). More generally, if either of the curves is simple, then the first homology group of its complement is isomorphic to Z. In this case, the linking number is determined by the homology ...