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Array construction scheme |
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Concentric grid is characterized by locations of its plane and center, by radii of circles and by angle between radial rays which cross them (see figure).
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Principles of array construction by concentric grid
Building an array by concentric grid
Array building principles |
Result (shown in a projection to a plane perpendicular to the array axis) |
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1.A grid plane is built that passes through base point of base instance perpendicular to the array axis. The point where array axis intersects this plane is the center of array grid. 2.The first ray and the first circle of a grid that pass through base point are being built in grid plane. Thus base point of the base instance is the first node of the grid. |
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3.Remaining grid rays and circles are built according to grid parameters, then locations of other grid nodes is determined. |
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4.Anchor points of other array instances are aligned with grid nodes. Instances are located relative to their base points exactly as base instance is located relative to its base point. |
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5.If turning in copies to radial direction is enabled, each of the instances is additionally rotated in grid plane relative to its base point so as to be located relatively to its ray as the base instance is located relatively to its ray. |
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Particularities of array construction for a group of objects
If an object group is being copied, then for all objects except operations the array is being built in the following way.
•If the base point is set manually, then the group of objects is copied as a whole: a single grid is built for the group of copied objects; if additional rotation is enabled, then each instance (group of copies) is rotated around its own base point (see Figure a).
•If the base point is auto determined, then objects in the group are copied separately: for each of objects, its own grid is built; if additional rotation is enabled, then the copy of each object is rotated around its own base point (see Figure b).
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Group of operations is always copied as a whole. |
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a) |
b) |
Array of object group by concentric grid with turning in:
a) point 1 is set as base point, b) base point is not specified
