How to draw geometric design - full tutorial

right this is going to be a a slow down version of one of my old um Islamic geometry videos a couple of people said they were too fast and they were too fast so you want to start by drawing a horizontal line and then take a pair of compasses and describe an ellipse then open up the par of compasses and go through the intersection of the circle and the horizontal line and you want to describe a small line at the top and at the bottom from that intersection and then go to the other intersection and do the same and that should give you a cross at the top and the cross at the bottom and you want to run a line between those two points through Center and that you'll give you a 90° angle between the two lines so you've got a perfect vertical and a perfect horizontal so now set set the par of compasses back to the original radius of the original Circle and through the top intersection steady up those and reck through that intersection I do another ellipse the same size as the original and it should go through the center and then on the other intersection at the bottom another Arc and then the last last two intersections so I've now got four ellipses with an ellipse in the in the center all of the same diameter and that's produced more segments I've split the the original circle into 12 so now I want to join the intersection so I pick one go through the center Cent and connect to the other side and describe a line and now pick the next intersection through the center and out the other side describe a line the next intersection is already done through the center and out the other side and so on that split the circle into 12 so now I want to draw three squares starting with the first it's small puppy so that's the first square and now 30° to that another square and then the final square at 30° to that I want to take a smaller set of compasses and using the intersection of two of those squares and one of the original lines going a bit closer so you can see what I'm doing and exactly where to take the measurement so where two of the squares intersect and one of the original lines I want to set my pair of compasses to that radius and create an ellipse now I can use that Circle to give me a radius for my second Circle which will go through the center and have the first Circle as a tangent so I set my distance and then create another circle inside the first Circle using the using the squares that I created before using those intersections I'm now going to split the original circle into 12 more parts it will now be 24 segments one in section through through the center out the other side and so on so now I'm going to link these two points and they should should run parallel with one of the lines at the moment it's the one that's minus 30° from vertical I count two intersections Along on each side and then I complete the parallel line I have three parallel lines I take two more intersections and run another parallel line parallel to the vertical one and two along and then down parallel again and so on and that's the final star from here I should be able to create a continuous line and so for the interlacing I follow a continuous line all the way through so wherever wherever line goes over the next time it it intersects it should go under so it's gone over there and so it must go under here so it alternates between going being the one on top and the one on bottom and as long as you follow that all the way around then you should end up with a a fully interlaced continuous line that creates this 12 fold grow it so it's gone over there and it must go under here so that's the basics I'm going to go back to my drawing now and I'll use a blue pen to create the continuous single line and then I'll go over it later in Black pen um with the interlacing but it's very hard to interlace um without putting in the line just with and then erasing all the construction lines cuz they get confusing when you're trying to Ink so I'm going to start at the top and going to work anticlockwise for no particular reason e so that's it done um and I'm going to go and rub out all the construction lines now so that I'm left with just the continuous line right so now I want to start trying to uh interlace The Continuous line I'll just get it in a bit closer so you can see what I'm doing right so now I'm going to start inking so I pick one in section to start from and I decide that one of those is going to be over which means the one that intersects it has to go under it so I fill that in so I know it's over so that's the top one so the next one it must go under and it alternates between going under over under over under over so that's over so it must go under so the one that intersects it there must go over it so I fill that in so where it goes under I break the line and where it goes over it's a continuous line normally I'd do this with a rule um but I'm just doing it free hand so it's a bit quicker and so you can see it easier and so on um so as long as you follow the line and it goes under over under over um and that you shade it this way um you should end up with a continuous interlace in line over a 12 rosette at the end so I'll just speed this up um so you can get a better picture of it you can either follow a line from one point all the way around but I like to work from the top down I just find it easier um and I can reference from other people pieces so that I'm just work a bit quicker I'm just going to change the view so you can see the whole thing now and there you go um it's very messy um but if you can get it nice and tidy you can then fill in those white areas with more detail or other lacing patterns so there

Channel: Lex Wilson

Views: 978,728

Keywords: Geometry (Field Of Study), Islam (Religion), islamic geometry, persian geometry, tutorial, drawing, interlacing, detail, lesson, how to, instructional, how-to, practice, lacing, geometric

Id: h3KdR8n10gg

Length: 17min 9sec (1029 seconds)

Published: Fri Oct 24 2014