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Line 40: − + + + + + + + + + + + + + + + + + + − Screenshot (14) − Now, you are encouraged to use your creativity to tweak the side profile of the egg to your own taste. I'll give a couple suggestions for how to tweak the spline for best results, but you are welcome to change the lengths of any of the construction lines to get different results. In addition, the arrows with diamonds that are tangent to the spline can be manipulated to change the shape of the curve. You always can press ctrl-Z if you don't like how the change looks. − If you zoom into the top of the egg, you'll notice that the spline connects to the 1mm horizontal line at an angle. We would like the spline to be approximately horizontal at the point of connection with the 1mm line. It doesn't need to be exact. To do that, pull the Smart Dimension of the 3mm line over to the right side to give yourself a reference. Then move the diamond/arrow thing from the spine parallel with the Smart Dimension reference line. − Screenshot (15) − Screenshot (16)
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<strong>Step 8:</strong> Use the spline feature to connect 5 points on your sketch and create a side profile of an egg. Click on each of the 5 points in succession (order matters), and press Esc to finish the spline.
<strong>Step 8:</strong> Use the spline feature to connect 3 points on your sketch and create a side profile of your egg. Order does matter, so click sequentially from top to bottom or bottom to top on each of the 3 points. Press Esc to finish the spline. You'll notice that it doesn't really look like the side profile of an egg yet, but we'll fix that shortly.
[[File:Egg 8.png|1500px|none]]
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<strong>Step 9:</strong> Now, you are encouraged to use your creativity to tweak the side profile of the egg to your own taste. I'll give a couple suggestions for how to tweak the spline for best results, but you are welcome to change the lengths of any of the construction lines to get different results. When you have the spline selected, you will see "adjustment arrows with diamonds" that are tangent to the spline. They can be manipulated to change the shape of the curve. You always can press ctrl-Z to undo a change to the original shape.
If you zoom into the top of the egg, you'll notice that the spline connects to the 1mm horizontal line at an angle (see the first screenshot). We would like the spline to be approximately horizontal at the point of connection with the 1mm line. This will give the appearance of a nice continuous curve, but it doesn't need to be exact. To do that, pull the Smart Dimension of the 3mm line over to the right side to give yourself a reference. Then move the adjustment arrow thing from the spine parallel with the Smart Dimension reference line (see the second screenshot).
[[File:Egg 9.1.png|1500px|none]]
[[File:Egg 9.2.png|1500px|none]]
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<strong>Step 9:</strong> Zoom into the bottom of the egg and perform the same operation on the intersection between the spline and the 6mm line. Again, the goal is to make the spline approximately horizontal where it connects with the 6mm line to maintain the continuity of the curve.
Smart Dimension the line to 45 degrees from the vertical construction line.
Smart Dimension the line to 45 degrees from the vertical construction line.