tag:blogger.com,1999:blog-2999230124118604245.post5565225190015621134..comments2024-03-28T16:36:12.581-04:00Comments on Gurney Journey: CentrolineadJames Gurneyhttp://www.blogger.com/profile/01870848001990898499noreply@blogger.comBlogger21125tag:blogger.com,1999:blog-2999230124118604245.post-18905511770114925382016-09-27T21:48:12.294-04:002016-09-27T21:48:12.294-04:00This method works the same way, but you have to cu...This method works the same way, but you have to cut a new set of curved boards for the t-square to ride on everytime you want to change your vanishing point. The centrolinead looks to be more convenient to use.<br /><br />https://dl.dropboxusercontent.com/u/15337940/persp.jpgiisawhttps://www.blogger.com/profile/11454386148259666080noreply@blogger.comtag:blogger.com,1999:blog-2999230124118604245.post-26109359700929946822016-01-18T08:57:46.124-05:002016-01-18T08:57:46.124-05:00@eqpierre, thanks for describing that device. I...@eqpierre, thanks for describing that device. I'm not familiar with it, but I'll keep a lookout, and maybe someone else here will know.James Gurneyhttps://www.blogger.com/profile/01870848001990898499noreply@blogger.comtag:blogger.com,1999:blog-2999230124118604245.post-52221272911234928272016-01-18T02:50:35.592-05:002016-01-18T02:50:35.592-05:00About 34 years ago I got a job at the research dep...About 34 years ago I got a job at the research department of a famous film manufacturer as a perspective draftsman. Goal was to make perspective drawings of new machinery to show financiers what the department was trying to accomplish, and thus, to get the funds to continue... I found a tool that made it possible to create perspective drawings on a drawing-board with vanishing points lying far beyond the limits of the board itself. It consisted of a transparent plastic ruler and a booklet with some formulas... (calculator was needed!) The ruler was tapered to one end and had kind of a protractor at the other end. Logarithmic scales on all sides, and a small pinhole at the center of the protractor to fix the ruler on your drawing-board, on top off a plan-view of the object you wanted to draw. With the formulas, you could calculate all the needed points and copy them from the ruler to your drawing. In time, moving to other counties and switching lives I lost the ruler. Went back to the store where I bought it, but they don't recall of such a device. Anybody got any idea about this "perspector"? at least, that's the name by which I remembered the ruler...eqpierrehttps://www.blogger.com/profile/11413064353196540842noreply@blogger.comtag:blogger.com,1999:blog-2999230124118604245.post-71358765725284358762015-01-13T06:48:45.350-05:002015-01-13T06:48:45.350-05:00My husband made me one for Christmas--It takes me ...My husband made me one for Christmas--It takes me a while to get the arms and the pegs adjusted, but once I get it set it works great. The explanations in the old books are not for the mathematically challenged.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-2999230124118604245.post-56763284747747498372014-10-31T09:40:06.441-04:002014-10-31T09:40:06.441-04:00Reminds me of a new tool I recently saw, Versa Rul...Reminds me of a new tool I recently saw, Versa Ruler: <br /><br /><a href="http://www.koalatools.com/ProductDetails.asp?ProductCode=KT-01" rel="nofollow"> http://www.koalatools.com/ProductDetails.asp?ProductCode=KT-01 </a><br /><br />I turned it into a portable drafting machine by nailing the ends to a wooden drawing board. Great for perspective drawing!Latin Laundry Co.https://www.blogger.com/profile/13693539253718016892noreply@blogger.comtag:blogger.com,1999:blog-2999230124118604245.post-54557589651586151892010-09-18T20:18:54.709-04:002010-09-18T20:18:54.709-04:00I have collected some information about the math b...I have collected some information about the math behind the centrolinead and a few methods for setting the angles on the rulers. It helped me to understand that the vanishing point, the studs and the ruler 'elbow' all lie on a circle. You can find it <a href="http://johnnyburn.blogspot.com/2010/09/how-to-align-centrolinead-james-gurney.html" rel="nofollow">here</a>.Johnnyburnhttps://www.blogger.com/profile/12004148485704278283noreply@blogger.comtag:blogger.com,1999:blog-2999230124118604245.post-17061143892341138592010-09-01T16:17:09.630-04:002010-09-01T16:17:09.630-04:00Am I the only one who doesn't know how this ce...Am I the only one who doesn't know how this centrolinead works? I must be stupid. Is there a more detailed explanation somewhere? Thanks.Andre Loftishttps://www.blogger.com/profile/03410561085651069579noreply@blogger.comtag:blogger.com,1999:blog-2999230124118604245.post-34639273030590973412010-06-24T20:35:14.892-04:002010-06-24T20:35:14.892-04:00In his book "Architectural Rendering in Tempe...In his book "Architectural Rendering in Tempera" Richard Baehr, a one time well known Architectural Illustrator, provides instructions and specs on how to make a centrolinead out of metal. I bought the book in 2001 and had a metal shop make up 5 of them for me. I sold 2 of them to an Architectural Illustrator friend of mine. I never did use them as I started using SketchUp for my perspectives. SketchUp conveniently prints large perspectives on tile sheets of paper which can be taped together and transferred onto watercolor paper or whatever. <br />The book is now available as an Ebook here: http://www.ebooknetworking.net/books_detail-0471285129.htmlSusan Sorgerhttps://www.blogger.com/profile/04023268813537547667noreply@blogger.comtag:blogger.com,1999:blog-2999230124118604245.post-32034238813345383822010-06-24T08:41:11.636-04:002010-06-24T08:41:11.636-04:00If someone made one of these, I would buy it. Alas...If someone made one of these, I would buy it. Alas, I have no skill with tools myself. :)mcahogarthhttps://www.blogger.com/profile/06634763788615510852noreply@blogger.comtag:blogger.com,1999:blog-2999230124118604245.post-5312917432288906852010-06-24T05:33:04.059-04:002010-06-24T05:33:04.059-04:00Richard, I think the formula given in your link is...Richard, I think the formula given in your link is not correct, should be:<br /><br />tan(beta) = vp/dMariohttps://www.blogger.com/profile/04477403806364388132noreply@blogger.comtag:blogger.com,1999:blog-2999230124118604245.post-33275505678717297692010-06-23T17:05:11.353-04:002010-06-23T17:05:11.353-04:00I think that with modern materials (thinner rigid ...I think that with modern materials (thinner rigid plastics) you could have the 'Y' arms coming directly off the main rule instead of off a 'T'. This would allow for a wider range for the tool. In extreme angles, the tool won't work as constructed.DPetersenhttps://www.blogger.com/profile/18313044038296524139noreply@blogger.comtag:blogger.com,1999:blog-2999230124118604245.post-4269883143624803622010-06-23T16:48:23.696-04:002010-06-23T16:48:23.696-04:00Sorry cut off link
http://lockyeardesign.com/Page...Sorry cut off link<br /><br />http://lockyeardesign.com/Pages/<br />Parametric/Centrolinead/01.htmlPatternGhosthttps://www.blogger.com/profile/10763094796840833777noreply@blogger.comtag:blogger.com,1999:blog-2999230124118604245.post-39593837249907778682010-06-23T16:46:34.891-04:002010-06-23T16:46:34.891-04:00The math and a well-made example.
http://lockyear...The math and a well-made example.<br /><br />http://lockyeardesign.com/Pages/Parametric/Centrolinead/01.html<br /><br />RichardPatternGhosthttps://www.blogger.com/profile/10763094796840833777noreply@blogger.comtag:blogger.com,1999:blog-2999230124118604245.post-63017083247349631512010-06-23T14:53:28.630-04:002010-06-23T14:53:28.630-04:00I have a centrolinead which has a fixed, diamond-s...I have a centrolinead which has a fixed, diamond-shaped head instead of two hinged arms. The head is marked with a scale of distances, and you put the pins at the marks on the scale.<br /><br />The two sides of the diamond are used for the left and right VPs.<br /><br />There is a full description, with a diagram from which one could be constructed, in "Perspective Drawing" by H F Hollis - an excellent little book.<br /><br />I bought the instrument, which is made of thick Perspex (=Plexiglas) many years ago, but have never actually used it. <br /><br />It is a nice thing to own, though.Don Coxhttps://www.blogger.com/profile/11232752398252841794noreply@blogger.comtag:blogger.com,1999:blog-2999230124118604245.post-54212368366944770402010-06-23T14:00:54.429-04:002010-06-23T14:00:54.429-04:00I actually did a tracing of the parts for Jim to t...I actually did a tracing of the parts for Jim to try and make his own in the shop. I could make a measured drawing for people if there was interest. I'll post it on my site later today or tomorrow. <br /><br />-Craig Elliott<br /><br /><a href="http://www.craigelliottgallery.com" rel="nofollow">Craig Elliott Gallery </a>Craig Elliotthttps://www.blogger.com/profile/00106292113083968127noreply@blogger.comtag:blogger.com,1999:blog-2999230124118604245.post-3130920266521182722010-06-23T13:40:04.122-04:002010-06-23T13:40:04.122-04:00Does anyone have a diagram or drawing of the measu...Does anyone have a diagram or drawing of the measured parts? It does not look very difficult to make one.Mary Brewsterhttps://www.blogger.com/profile/16484849213214173753noreply@blogger.comtag:blogger.com,1999:blog-2999230124118604245.post-38319973266852421922010-06-23T12:36:33.319-04:002010-06-23T12:36:33.319-04:00Brilliant, I get tired of loosing my perspective o...Brilliant, I get tired of loosing my perspective on larger paintings. I wonder if I could construct a frame to use on my easel based on this.<br /><br />E-E.M. Gisthttps://www.blogger.com/profile/00056129705507552850noreply@blogger.comtag:blogger.com,1999:blog-2999230124118604245.post-1803475793601715512010-06-23T12:25:48.835-04:002010-06-23T12:25:48.835-04:00Wow, that is pretty neat.
It would be great to us...Wow, that is pretty neat.<br /><br />It would be great to use on 24 Hour Comic Book Day.<br /><br />Time to figure out a homemade DIY version of it?Brianhttps://www.blogger.com/profile/01789094236183502398noreply@blogger.comtag:blogger.com,1999:blog-2999230124118604245.post-78848678790803502062010-06-23T11:16:43.400-04:002010-06-23T11:16:43.400-04:00Digging around a little bit, I came up with this:
...Digging around a little bit, I came up with this:<br />http://books.google.com/books?id=FetJAAAAMAAJ&pg=PA43#v=onepage&q&f=false<br /><br />He mentions that the two arms are adjusted 'by trial,' and that 'the difficulty of adjustment' is a problem.<br /><br />Also the author leaves a tantalizing clue about the priciple on which it acts and 'a simpler instrument for the same purpose' that can be found at another resource. I'll leave that discovery for another commenter.<br /><br />Thanks for the post. I want to make a trip to the hardware store now.Johnnyburnhttps://www.blogger.com/profile/12004148485704278283noreply@blogger.comtag:blogger.com,1999:blog-2999230124118604245.post-64085364128731492022010-06-23T10:54:40.082-04:002010-06-23T10:54:40.082-04:00Why am I only hearing about this now? Great tip! (...Why am I only hearing about this now? Great tip! (Although, I must admit, I do much of my perspective on the computer now.) Also, good call on the magnets. I draw on a slanted, metal board and have magnets attached to all my tools—my eraser never makes it to the floor anymore.Paolo Riverahttps://www.blogger.com/profile/11088106827920011644noreply@blogger.comtag:blogger.com,1999:blog-2999230124118604245.post-20954899081823702802010-06-23T10:10:47.461-04:002010-06-23T10:10:47.461-04:00That's awesome! I'm right now working on a...That's awesome! I'm right now working on a perspective drawing and this tool looks like a real time saver!Bjorn Nelissenhttps://www.blogger.com/profile/17255178766372565689noreply@blogger.com