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Control of the Procedure of Drawing Objects |
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While displaying and printing graphic documents, the sequence of rendering objects is taken into account. The default procedure of rendering is determined by the system automatically depending on the type of object: first, rendered are hatches and fills, above them – auxiliary straight lines, then – lines, circles, ellipses, etc. As a result, it turns out that objects mutually overlay one another in the order of rendering.
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The effect of overlapping is especially visible while handling multicolored fills and hatches, as well as multicolored lines of great thickness. |
For example, in the document created are a rectangle, hatch, and a linear dimension. By default, they are allocated as follows: hatch, rectangle, dimension, i.e. the hatch is overlaid by a rectangle and dimension, and the rectangle – by a dimension only.
At any moment of working with a document, you can change the default position of objects relative to one another. To that end, select the object whose allocation needs to be changed, and invoke the required command from the menu Edit – Change order, or from the context menu. Description of these commands is represented in the Table.
Commands to control visibility of objects
Command |
Description |
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To Front |
Places the selected object in front of all the objects. As a result, the moved object will overlap all the remaining objects. |
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To Back |
Places the selected object behind all the objects. As a result, the moved object will be overlapped by all the remaining objects. |
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Before object |
Places the selected object in front of the specified object. After invoking the command, specify the object before which the selected object should be placed. As a result, it will overlap the specified object and all the previous objects. |
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Behind object |
Places the selected object behind the specified object. After invoking the command, specify the object behind which the selected object should be placed. As a result, it will be overlapped by the specified object and all the subsequent objects. |
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Forward One forward |
Swaps the selected object and the object before it. |
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Back One Level |
Swaps the selected object and the object behind it. |
Commands that change visibility can be applied to multiple selected objects at once. At the same time, adjacent objects (lying at the neighboring levels) are moved as a single object.
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When you try to select one of the overlaid objects with a mouse (see section Selection of objects with a mouse) One of the overlaid objects highlights the closest one among them. To select objects located under this object, use the Picking Over command (see section Picking Over). |
While setting up the visibility of objects of graphic documents, the following specific points should be kept in mind.
•Change of visibility is accessible to objects belonging to the current and active layers (for details of layers, see the section Layers) fragment or current view (for more details about views see Section Simple and associative views) drawing.
•Visibility of objects belonging to different views is determined automatically by the system: the views created later are regarded as located in front of the formerly created views. Thus, for example, objects of the very first – system – view of a drawing are overlaid by objects of all the other views. Change of the relative position of views is impossible.
•The following objects of a drawing are always in front of all the remaining ones:
•external and internal marquee,
•title block,
•technical specifications;
•majority surface finish,
•BOM on sheet.
•Objects forming the inserted fragment, are located relative to each other as they are in the source fragment. Insert of a fragment takes one level of visibility in the main document. Therefore, while working with the main document it is impossible to change the order of objects constituting an insert. To that end, editing of inserted fragment itself is required.
•Macro-element, like the insertion of a fragment, occupies one visibility level. At the same time, immediately after creation the macro-element is located in front of all the other objects. Objects inside a macro-element are located relative to one another in the same way as before their integration.
