Meeting with David
1. Need to calculate the medium trajectory of 34-35; 35-36; 36-37;37-38;38-39….
2. Calculate the medium value of 34-35; 35-36;37-38;38-39…… (Done)
3. Calculate the intersection point value Y for 34-35; 35-36;37-38;38-39……
4. Draw line to get birthing surface