At some time or other, you will have need of each idea. The one I discussed at some length is essentially what you chose to do, adjusted to make things work. So adjustment steps have to be built in, if long-term accuracy is desired. A plan for pressing the seams to aid in both keeping the block flat and in assisting. Close attention to visual queues that help you place the seam lines as you connect rows and blocks. It is not quite as simple as that! Fairly quickly, because of accumulating roundoff errors, there will be degradation of quality: the spinning circle will make a lousy clock. Getting your points sharp comes down to a few steps: Accurate cutting (which boils down to good quilting rulers) Accurate 1/4 seam allowances. The matrix is precomputed, so the calculations are blazing fast. Update 2: Here is the graph I got for $(x_)$. Also, the coordinates are going counterclockwise, when they need to go clockwise. The circle begins to draw at the correct coordinates, but once it hits 180 degrees, it jumps back up to zero degrees. Set the values so next iteration of drawing, x1 and y1 will be the new NewY = cy + radius * SIN(arc - PI - (PI / 180.0)) NewX = cx + radius * COS(arc - PI - (PI / 180.0)) Y1 = starting y coordinate, or updated y coordinate With special tools and a set of graduated rings, they can help you determine the correct ring finger size in a couple of minutes. The most ideal and accurate way to go about doing this is to have the finger measured by a jeweler or professional. x1 = starting x coordinate, or updated coordinate Head to the Jeweler to Measure Your Finger Professionally Jeweler using a mandrel to measure ring size. I have implemented what I believe to be the correct formula, but I'm only getting a half circle, e.g. I can't figure out how to calculate the new position, given the offset of 160, 240 being my center, and what I want to rotate around. My new x and y give me crazy results, nothing even close to my circle. New y = 240 - (distance x SIN(1 degree x (PI / 180))) If any of your intersection only have one side with a point and the other coordinating seam with no points, I first run the pin through the tip of the top point and then just pin the seam intersection to match the seams, making sure the top of the fabric from both rows are level with each other. New x = 160 - (distance x COS(1 degree x (PI / 180))) The coordinates of one of my circles is: y1 = 152Īnd my calculation for the next point, 1 degree from the starting point (140.5,152) is: distance = SQRT((160-x1)^2 + (240-y1)^2) = 90.13 Presently, my calculation looks like the following: I have been able to calculate the distance/radius from the point to the individual circles, but I am unable to plot the next point on either circle, given an angle from the center point. The Green and Blue circles represent circles that orbit the center point. I have the following circles around a common point: The median is generally a better measure of the center when there are extreme values or outliers because it is not affected by the precise numerical values of. I have what seemed like a very simple issue, but I just cannot figure it out.
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