TriptychScenic Posted October 31, 2009 Share Posted October 31, 2009 Im trying to extrude this shape. Its just two arc's joined by two lines. when i go to convert it to a polygon with the paint bucket mode it wont do anything. tried makeing other shapes and filling them with p/bucket and they work fine. is it something to do with the arc? Quote Link to comment
Ray Libby Posted October 31, 2009 Share Posted October 31, 2009 I looks line the lines/arcs aren't connected. I used the Connect/Combine tool in Dual Objects Connect mode to connect all four corners. The paint bucket worked to create a Polyline as did the Compose command. Quote Link to comment
TriptychScenic Posted October 31, 2009 Author Share Posted October 31, 2009 Hi Ray thanks, i'm still getting weird results. connecting the corners kind of worked. i want to make it into a polygon as opposed to polylines so i can extrude it into a solid object. when i went through your suggestions i got this... open and render in openGL then 3d flyover... Quote Link to comment
TriptychScenic Posted October 31, 2009 Author Share Posted October 31, 2009 ok i got it. when i go to use the paint bucket to fill for the polygon i needed to have the solid fill option on in the attributes pane. my bad...thanks for your help:) Quote Link to comment
Ray Libby Posted October 31, 2009 Share Posted October 31, 2009 That shouldn't make any difference. I just tried it again with the Paint Bucket and it worked with none fill as the default. So I'm not sure why it didn't work the first time. Quote Link to comment
GWS Posted October 31, 2009 Share Posted October 31, 2009 It seems in ExtrudeProblemProgress.vwx you have 3 objects on top of one another, 2 polylines and 1 extrude. The extrude is only 12mm high so might look like it is flat in 3D. If you use the OIP to change the extrusion height to say 2000mm it will show what I mean. You original drawing needed to use the combine tool (as Ray mentioned) to make the 4 polylines into one. Quote Link to comment
TriptychScenic Posted October 31, 2009 Author Share Posted October 31, 2009 thanks guy's... working from the original file, there are only 4 objects. i combine all the corners like ray said. works great. but it converts the lines into polylines. i want to convert the lines into a single solid polygon. to give me the same results as it would if i just drew a rectangle and extruded it by 12mm. Quote Link to comment
TriptychScenic Posted October 31, 2009 Author Share Posted October 31, 2009 sorry here is another example Quote Link to comment
GWS Posted October 31, 2009 Share Posted October 31, 2009 Once you have combined/joined the 4 polylines go to Modify>Convert>Convert to Polygons. Then make sure that the 'closed' check box (in the OIP) is checked to close the polygon. Quote Link to comment
TriptychScenic Posted October 31, 2009 Author Share Posted October 31, 2009 legend....thanks for your help Guy. worked a treat. no idea what that closed box is for but i'll look into it Thanks aswell Ray, you were right the, fill had nothing to do with it. and you showed me a couple of things i didn't know... appreciated Quote Link to comment
Ray Libby Posted October 31, 2009 Share Posted October 31, 2009 Glad it worked out. Quote Link to comment
Bruce Kieffer Posted November 1, 2009 Share Posted November 1, 2009 I make a lot of strange shaped objects for extruding. I find it best to think differently. Rather than build your object as segments, join the segments, and then extrude; instead, use closed objects, add and/or clip them to make the object you want, and then extrude. I find that VW likes this way better. The resulting object is "clean" and renders correctly. Here's an example: Draw a circle. Draw another circle of a smaller diameter and concentric inside the first circle. Select both circles. Use the clip command under the modify menu. Hit the delete key to remove the center circle. Now you have a doughnut shape. Draw a square that covers the left half of the doughnut. Clip and delete again. View in right ISO, extrude and render hidden line, and you will see the results. Once you get this, then try the clip tool. It can be used to quickly remove parts of closed objects. I attached a PDF that show's how to do this. Quote Link to comment
Kevin McAllister Posted November 1, 2009 Share Posted November 1, 2009 I used to use Bruce's method all the time, as it was part of my 2D workflow so it carried over when I began using 3D more heavily. You do need to be aware it can cause artifact lines if you are clipping a hole in the centre of a surface and rendering using Open GL. I have attached an example. Of interest, this is the first time I have done a side by side example in VW2010. I was surprised how differently the rendered line quality is from one method of 3D construction to another...... especially given the solid shapes are essentially the same. Kevin Quote Link to comment
GWS Posted November 1, 2009 Share Posted November 1, 2009 I have found that it is better to use the subtracting solids method rather than the clip surface and then extrude method. It makes for more resulting editable solids further down the line. Quote Link to comment
Bruce Kieffer Posted November 1, 2009 Share Posted November 1, 2009 If the "artifact lines" that Kevin mentions are an issue, then GWS's solid subtraction method will eliminate them. As for the editing of a 2D clipped polygon object post extrusion verses a 3D solid subtraction, I have found both are editable. Quote Link to comment
GWS Posted November 1, 2009 Share Posted November 1, 2009 Yes I agree both are editable, but I find that somehow the subtraction method is more intuitive....although I'm not sure why! Quote Link to comment
Bruce Kieffer Posted November 1, 2009 Share Posted November 1, 2009 Yes I agree both are editable, but I find that somehow the subtraction method is more intuitive....although I'm not sure why! I think it's because there are less steps to get to the editing. Quote Link to comment
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