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To complete the drawing to a straight-line combinatorially isomorphic re-embedding of G, v should be placed in the polygon and joined by straight lines to the vertices of the polygon. By the art gallery theorem , there exists a point interior to P at which v can be placed so that the edges from v to the vertices of P do not cross any other ...
Line art or line drawing is any image that consists of distinct straight lines or curved lines placed against a background (usually plain). Two-dimensional or three-dimensional objects are often represented through shade (darkness) or hue . Line art can use lines of different colors, although line art is usually monochromatic.
LibreOffice Draw is a free and open source vector graphics editor. It is one of the applications included in the LibreOffice suite, developed by The Document Foundation . LibreOffice Draw can be used to create complicated figures using shape tools, straight and curved tools, polygon tools, among other features.
linear or point-projection perspective works by putting an imagery flat plane that is close to an object under observation and directly facing an observer's eyes (i.e., the observer is on a line normal or perpendicular to the plane). Then draw straight lines from the object to the observer.
Single color line drawing algorithms involve drawing lines in a single foreground color onto a background. They are well-suited for usage with monochromatic displays. The starting point and end point of the desired line are usually given in integer coordinates, so that they lie directly on the points considered by the algorithm.
A straightedge or straight edge is a tool used for drawing straight lines, or checking their straightness. If it has equally spaced markings along its length, it is usually called a ruler . Straightedges are used in the automotive service and machining industry to check the flatness of machined mating surfaces.