large scale fill pattern "breaking down"

[t1.shep]

I'm trying to get a fill pattern that looks fine at most smaller scales (1/8th, 1/4) to look fine at larger scales for detailing (1"=1').
Here's what it is looking like at two different scales, with the messed up scale highlighted in red.
This is just a gravel fill pattern. I've tried changing the scale, making it a model pattern at different scales, but without any success.

[hugh.69031]

It looks like the gravel hatch pattern has fallen apart due to low internal precision in the pattern definition (.PAT) file.

In AutoCAD you can move a hatch's origin to lessen the accumulation of errors but I don't know of any way you can do that with a Revit Drafting pattern.

What are the co-ordinates of the hatch?


Hugh Adamson
www.cadro.com.au (http://www.cadro.com.au)

[tomnewsom]

Yep, .pat has rather limited precision and is particularly bad at 'natural' patterns that aren't geometrically tidy. Revit badly needs a pattern definition format of its own.

PS: You might find that printed the result looks ok.

[t1.shep]

It looks like the gravel hatch pattern has fallen apart due to low internal precision in the pattern definition (.PAT) file.

In AutoCAD you can move a hatch's origin to lessen the accumulation of errors but I don't know of any way you can do that with a Revit Drafting pattern.

What are the co-ordinates of the hatch?


Hugh Adamson
www.cadro.com.au (http://www.cadro.com.au)

*GRAVEL,Gravel pattern
228.0128, 0.720,1.000, 12.041365,0.074329, 0.134536,-13.319088
184.9697, 0.630,0.900, -12.041517,0.043315, 0.230868,-22.855925
132.5104, 0.400,0.880, -14.865942,0.061430, 0.162788,-16.116032
267.2737, 0.010,0.630, -20.024928,0.047565, 0.210238,-20.813558
292.8337, 0.000,0.420, -12.999910,0.048507, 0.206155,-20.409373
357.2737, 0.080,0.230, -20.024928,0.047565, 0.210238,-20.813558
37.6942, 0.290,0.220, -16.401180,0.035968, 0.278029,-27.524849
72.2553, 0.510,0.390, 23.086761,0.038097, 0.262488,-25.986321
121.4296, 0.590,0.640, 15.264264,0.047405, 0.210950,-20.884073
175.2364, 0.480,0.820, -11.045049,0.083045, 0.240832,-11.800763
222.3974, 0.240,0.840, 16.278789,0.032108, 0.311448,-30.833375
138.8141, 1.000,0.620, 9.219065,0.094072, 0.106301,-10.523844
171.4692, 0.920,0.690, -13.152853,0.049447, 0.202237,-20.021511
225.0000, 0.720,0.720, 0.707107,0.707107, 0.141421,-1.272792
203.1986, 0.650,0.840, -5.383564,0.131306, 0.076158,-7.539615
291.8014, 0.580,0.810, -3.156821,0.185695, 0.107703,-5.277462
30.9638, 0.620,0.710, 3.601470,0.171499, 0.174929,-5.656023
161.5651, 0.770,0.800, -2.213594,0.316228, 0.126491,-3.035787
16.3895, 0.000,0.810, 10.440154,0.056433, 0.177200,-17.542845
70.3462, 0.170,0.860, -11.704507,0.067267, 0.148661,-14.717408
293.1986, 0.770,1.000, -5.383564,0.131306, 0.152315,-7.463458
343.6105, 0.830,0.860, -10.440154,0.056433, 0.177200,-17.542845
339.4440, 0.000,0.190, -5.383893,0.117041, 0.170880,-8.373124
294.7751, 0.160,0.130, -12.082844,0.069843, 0.143178,-14.174643
66.8014, 0.780,0.000, 5.383564,0.131306, 0.152315,-7.463458
17.3540, 0.840,0.140, -13.601340,0.059655, 0.167631,-16.595424
69.4440, 0.290,0.000, -5.383893,0.117041, 0.085440,-8.458564
101.3099, 0.720,0.000, 4.118439,0.196116, 0.050990,-5.048029
165.9638, 0.710,0.050, -3.152963,0.242536, 0.206155,-3.916950
186.0090, 0.510,0.100, -10.049739,0.052342, 0.191050,-18.913923
303.6901, 0.620,0.620, -2.218801,0.277350, 0.144222,-3.461329
353.1572, 0.700,0.500, 17.117197,0.039715, 0.251794,-24.927563
60.9454, 0.950,0.470, -8.061673,0.097129, 0.102956,-10.192674
90.0000, 1.000,0.560, 1.000,1.000, 0.060000,-0.940
120.2564, 0.490,0.130, -8.061936,0.071982, 0.138924,-13.753520
48.0128, 0.420,0.250, 12.041365,0.074329, 0.269072,-13.184552
0.0000, 0.600,0.450, 1.000,1.000, 0.260000,-0.740
325.3048, 0.860,0.450, -12.206392,0.063246, 0.158114,-15.653274
254.0546, 0.990,0.360, 4.120817,0.137361, 0.145602,-7.134508
207.6460, 0.950,0.220, 21.470869,0.042182, 0.237065,-23.469474
175.4261, 0.740,0.110, 13.038344,0.039873, 0.250799,-24.829074

[hugh.69031]

What I was actually asking was what were the coordinates of the area you hatched in red - are they large values representing a location a long way way from the site origin?

On the assumption the problem is one of numerical precision over a large distance I have recalculated the pattern you posted as a Revit Drafting pattern and uploaded a more accurately specified version to try out if you wish to. You can scale it up about 4.5x before Revit won't load it but larger scales again are possible if rescaled in HatchKit.

hth,

Hugh Adamson
Cadro Pty Ltd
www.cadro.com.au/hatchkit (http://www.cadro.com.au/hatchkit)