In IrriMaker you can easily have the laterals in the block follow an arc.
1. Draw the outline of your irrigation block with cadlines. Perhaps you need an arc because your block is right next to a pivot. Whatever the case is, its easiest to have your block drawn in cad so that the actual irrigation block can be defined by tracking your cad outline.
2. From the Irrigation menu’s block tab, select Add New. Then select Define irregular area. Press spacebar to open the snapmodes menu. Select the tracK option an click on your cad outline.
3. Select Micro/Drip from the Blocks tab to place micro drip laterals along the line of an arc. From the Pipes tab, select Cad Circle underneath ADD/CUT Pipe&Node. Follow the steps to space your laterals appropriately along the line of the arc. One step is to select the circle in which case you would point to the arc side of the block. The result should be a block filled with laterals along the line of the arc.
Thank you for your time and attention.