Sketcher ValidateSketch/zh-cn

描述

The Sketcher validation task panel

用法

选项

缺失重合约束

找出有重合关系却缺失重合约束的顶点，并为之添加重合约束。按下Find按钮；程序会弹出一个对话框来报告找到了多少缺失的重合约束； 并在3D视图中以黄色小十字符号表示出来。按下OK来关闭此对话框，再按Fix按钮来添加缺失的重合约束。

如有需要，可在下拉字段中定义一个更大的公差值。

Press Highlight troublesome vertexes to highlight vertexes that are outside this tolerance.

This tolerance is also used by the Find/Fix process.

通过选择"Ignore construction geometry"复选框在分析过程中忽略造型几何图形。

Invalid constraints

For example, if there is a Circle-Line-Tangent constraint, but it references two lines, it is considered invalid.

(This sometimes happens due to the Topological naming problem, i.e. the external geometry changes type).

It also does other checks, such as for empty links.

Degenerated geometry

Degenerated geometry can result from solver actions in a sketch.

For instance, if a line is forced to shorten to become almost a point.

Other examples: a zero length line or zero radius circle/arc.

Reversed external geometry

This process might be helpful if sketches with external-geometry fail to solve because of these changes.

Constraint orientation locking

Internally they work by constraining the angle between tangent vectors. With tangent constraint for example, the angle can be 0 or 180 degrees (co-directed or opposed vectors). The actual angle is remembered in the constraint data ("constraint orientation is locked"), it guards against flipping. But the angle can be erased ("constraint orientation unlock") or updated; these tools do exactly that.

The locking mechanism typically works well and this tool should not be needed. It should only used after making a backup of the open document.