Diagram drawing apparatus
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United States of America Patent
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Sep 17, 1996
Grant Date -
N/A
app pub date -
Mar 1, 1993
filing date -
Mar 2, 1992
priority date (Note) -
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status (Latency Note)
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Abstract
In a diagram drawing apparatus when a figure in the diagram is enlarged or reduced, data at a line having one end tangent to the figure is automatically modified according to the enlargement or reduction of the figure. When a figure, for example, a rectangle of a flowchart representing a processing step, to which a straight line indicative of a flow of the flowchart is connected, is enlarged, data denoting the line end coordinates (end point coordinates) of the straight line tangent to the rectangle and the other line end coordinates (start point coordinates) of the straight line are read out from a diagram data memory and then stored in a data memory. After that, coordinates of an intersection point between the enlarged rectangle and the straight line are calculated and stored in the data memory. The end point coordinates of the straight line stored in the diagram data memory are changed so as to coincide with the intersection point coordinates, thereby drawing a new straight line connected to the changed start point coordinates in the enlarged rectangle.
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Cited Art Landscape
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