Is there any way to change the aspect ratio of hatch patterns in DC14? I'd like to take the shingle pattern and squash it vertically, as the pattern looks like shingles hanging on a vertical surface. Obviously as they're laid on a roof plane closer to horizontal than vertical the horizontal lines should be closer together. Anyone know if there's a way to adjust this?
I did exactly what Neil mentioned for roof shingles. I kept the horizontal elements as they were and revised the verticals to show correct for a 45 degree slope. Unfortunately, that wasn't as good a solution as I had hoped that it would be because at anything other than at a large scale, the horizontal lines began to give a dense pattern. At about a correction of two thirds the original spacing, the pattern became useful again. I had hoped to see some way to do that for patterns on a circular surface and realized that the same density problem would be in place at each side of the cylinder. There is probably some way to do that where the density doesn't reach 100% along each rotating surface, but I now realize that the only person on Earth with the talent to create something like that is Josh Huggins. Woody
Not really sure if this works in 14, but here's the workaround I just figured out to independently scale a hatch.
I needed some brick to look like it was set on a 45° wall on my elevations. To make use the same hatch pattern and make it scaled to 0.7071068 x the scale in the X direction only is currently not available in the hatching. So, I hatched the faces i needed with normal brick, then Clipboard Select > Cut them out. Then Paste as Symbol (Ctrl + Sht + V) back to the same spot. Open the symbol for editing and enlarge them by the insertion point to a factor of 1.4142140 (square root of 2) in the X direction only. Check the hatch scale and reset if needed because enlargements tend to change them. Close and save the symbol. Then, open the symbol properties and change the X scale to 0.7071068 (inverse of square root of 2).
Viola! Now the hatch pattern appears to be scaled in the X direction only. It also works on roof hatch patterns for different pitches (changing the Y scale only instead).
I realize this feature probably only works in 16, but you could try enlarging the symbol in the X direction only in previous versions.
Here is how you might do it in DataCAD 14: Hatch the pattern, and then rotate it to the required angle (whether to actual roof slope or a slope that isn't accurate but graphically looks good) using 3D rotate, on the X axis in your case. Here's the glitch: once you rotate it, you won't be able to stretch it to fit the orthagonally projected elevation view to fill out the roof. So you would have to first figure out the actual 'diagonal dimension (rake) of the roof (or a fudged rake dimension for 'graphically looks good' scale) make a temporary snapping point, and then hatch to that. Rotating it will then make it fill out the elevation view. If you then look at it in a side elevation or isometric view, you'll see that it is floating free of the lines of the elevation drawing, but in the plan view (assuming you are drawing elevations in the plan view like an old guy like me) they will appear to be in the same plane. Did I explain that so its understandable? It's Monday AM, so I'm not firing on all cylinders. Now, time to do something billable!
I have just spent some time searching the forum, because I too like my shingles to look different at different roof pitches.
Here's how I have done it for years now:
Draw the outline of the area to be hatched on a separate layer. Move the outlined area to a clean area of the sheet. Enlarge the y-axis of the outline, by say, double. Hatch the enlarged area. Explode the hatch using 3D explode. Then use the inverse of the previous enlarge (in this case it would be .5) to reduce the hatched area to the original outline.
Now you have a hatch with the original x dimensions but reduced y dimensions.
This is a clumsy way and takes a lot of memory because of the huge increase in lines, but it's the only way I have found of creating the effect.
If someone has found a more elegant way that doesn't involve writing code, I would like to hear from you.
This allows me to keep a symbol library of the most common roof slopes and/or most popular shingle hatches.
I still need to explode the hatch before using Clipit to get the shape I want.
I don't know how to use Symbol Clipping (I don't even know where to find it...). I have searched the forum, the internet and the Reference Manual. Because people talk about it, I know it exists, but I sure would like to know where I can read up on how to find and use this tool.
You can use Symbol Clip exactly like you would use X-Clip: Control/Right Click on the unexploded symbol, and select Symbol Tools / SClip, and then New Cube and then Polyline. Snap to the boundary of the roof area. That's it!
If SClip is grayed out, first toggle on Enable SClip right above it.