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Why 2D Distance has MAX and MIN that are larger than the MEAS value for line to line?
> The 2 Dimensional option calculates the two-dimensional distance between features. All features used to calculate the 2D distance are first projected into the current work plane before the distance is computed. PC-DMIS computes the maximum, minimum, and average distances between the two features. If the distance is between two lines or planes, the maximum, minimum and average are computed using the measurement point data. (Verify that the distance type is set to 2 Dimensional.)
For line1 to line2 in the example
1) 2D distance (meas) = projection {distance [centroid of line1, centroid of line2], axis}
2) MAX 2D distance = projection {distance [start Pt, centroid of line2], axis}
2) MIN 2D distance = projection {distance [end Pt, centroid of line2], axis}

2009-11-24, 10:43 AM	#2
huangyhg 超级版主注册日期: 04-03 帖子: 18592 精华: 36 现金: 249466 标准币资产: 1080358888 标准币	回复: Why does user want to know MAX and MIN for 2D distance between line and line? Why 2D Distance has MAX and MIN that are larger than the MEAS value for line to line? > The 2 Dimensional option calculates the two-dimensional distance between features. All features used to calculate the 2D distance are first projected into the current work plane before the distance is computed. PC-DMIS computes the maximum, minimum, and average distances between the two features. If the distance is between two lines or planes, the maximum, minimum and average are computed using the measurement point data. (Verify that the distance type is set to 2 Dimensional.) For line1 to line2 in the example 1) 2D distance (meas) = projection {distance [centroid of line1, centroid of line2], axis} 2) MAX 2D distance = projection {distance [start Pt, centroid of line2], axis} 2) MIN 2D distance = projection {distance [end Pt, centroid of line2], axis} __________________ 借用达朗贝尔的名言：前进吧，你会得到信心! [url="http://www.dimcax.com"]几何尺寸与公差标准[/url]