I downloaded the file and tried to install but got a .net framework error. It appears that my .net framework is newer than the one used for this tool. I'm not sure I want to downgrade my framework to use the jump placer, but I am somewhat anxious to try it out.
Added: Since you seem to understand the coding requirements let's assume for now that the IPL line will be written correctly. I took a look at the IPL line in the screenshot but the data didn't appear to be valid - just an example line. However, there were no logic errors; what was there might make a very tiny jump just below the field in Blueberry Acres (too many zeros).
Here are a few example IPL jumps in the LS area. The Isolated Mound is in the middle of the field near the start of the Wu Zi Mu race; on the hill by the river. The Andromeda will spawn between the runways at the LS airport - jump it using the obvious ramps. Jump the road to the Santa Maria pier using the stairs and landing in the parking lot in front of the Santa Maria Beach House.
1431.5, -189.75, 31.0, 1435.5, -187.75, 35.0, 1360.0, -322.0, -1, 1440.0, -275.0, 5.0, 1446.567, -209.14, 41.4, 1000 // Isolated Mound
1876.5, -2546.0, 15.5, 1880.5, -2540.0, 19.0, 1955.0, -2555.0, 12.5, 1990.0, -2532.0, 14.5, 1940.5, -2523.0, 16.5, 1000 // Andromeda Jump
405.0, -1805.5, 6.0, 410.0, -1798.5, 9.0, 309.0, -1817.0, 3.0, 355.0, -1791.0, 5.0, 369.75, -1806.75, 19.75, 1000 // Yacht Harbor Sign
# vehicle supplement for testing (and the Hunter because I like how it's parked)
1940.0, -2545.043, 13.58173, 0, 592, -1, -1, 1, 0, 0, -1, 20000 //Andromeda
317.5, -1760.0, 12.77344, 0, 425, -1, -1, 1, 0, 0, -1, 20000 //Santa Maria Hunter
2243.425, -1258.118, 23.95037, 4.71, 522, -1, -1, 1, 0, 0, -1, 20000 //Jefferson NRG
I'm finding it difficult to explain my difficulties with the jump tool interface. I think this is mostly because the 5 required points aren't labeled.
1st set of 3 values on the line are startXmin, startYmin, and startZmin which define point start_min
2nd set of 3 values define: start_max
3rd set of 3 values define: land_min
4th set of 3 values define: land_max
5th set of 3 values define: camera_point
So I find a good jump, take some readings, and I'm ready to enter my coordinates in the Jump Placer. Which box do I fill in for start_min? I would think that I would enter the data in the 1st box, the box on the upper left. But the upper left box has greater Y and Z values. To get the math to work out as expected the start_min coordinates would be entered in the 2nd box - bottom-center. Start_max in the upper-left box, land_min bottom-right, land_max in the upper-center, and camera way off in the far upper left.
I generate the IPL line and try to double check my data to make sure everything is correct. When I read the new IPL line from left to right I need to visually jump back and forth from bottom-center to top-left, etc. instead of reading the boxes left to right along with the IPL line.
Finally, if Start_min is in the bottom-center then north and south is left to right in your interface. I find this to be visually confusing. I'm expecting left to right to represent west to east and far and near to represent north and south. If start_min was placed in the bottom-left (...) land_max in the upper-right then the interface would be much more intuitive. And I guess logically the camera would be far to the right - at the end of the IPL line, but I seriously doubt there will be that much confusion about where the camera coordinates should be entered.
On a side note for documentation: We should keep an eye out for the maximum limit for the jump rewards. I think very large numbers can be entered and calculated accurately, but frequently the numbers displayed on the screen don't match the values added to CJ's cash if they get large enough. I had some notes on this but forgot where I put them.