Path for many objects

Hi guys!
I'm new in fusion and I hope you help me. My question is about path. Is it possible to connect different objects to the same path (polygon, line, any)? I know it's possible if I'll make pathes for every objects. But I want just one. For example, make the path (polygon) and connect an object, animate it with displacement, make second object and connect to the same path with displacement offset.
Thank you for reply!

Yes. That's definitely possible. There are various ways to go about it.
Personally I don't like using the displacement option, because you have less control on the actual position on the path. Working with x/y splines is usally more precise.
What I like to do in cases like this is working with the 'offset position' modifier which can offset a motion both in position and in time. It's a very flexible way of tying things together.

Select the code below and paste it in the flow area to see what I mean. As soon as you change the path of the green rectangle the red 'path' (motion) will change with it.

Code: Select all

{
   Tools = ordered() {
      Background1 = Background {
         Inputs = {
            GlobalOut = Input { Value = 100, },
            Width = Input { Value = 1920, },
            Height = Input { Value = 1080, },
            ["Gamut.SLogVersion"] = Input { Value = FuID { "SLog2" }, },
         },
         ViewInfo = OperatorInfo { Pos = { 165, 16.5 } },
      },
      Green = Background {
         NameSet = true,
         Inputs = {
            GlobalOut = Input { Value = 100, },
            Width = Input { Value = 1920, },
            Height = Input { Value = 1080, },
            ["Gamut.SLogVersion"] = Input { Value = FuID { "SLog2" }, },
            TopLeftGreen = Input { Value = 1, },
            TopLeftBlue = Input { Value = 0.016, },
         },
         ViewInfo = OperatorInfo { Pos = { 165, 49.5 } },
      },
      Transform1 = Transform {
         Inputs = {
            Center = Input {
               SourceOp = "Path1",
               Source = "Position",
            },
            Size = Input { Value = 0.25, },
            Input = Input {
               SourceOp = "Green",
               Source = "Output",
            },
         },
         ViewInfo = OperatorInfo { Pos = { 275, 49.5 } },
      },
      Path1 = PolyPath {
         DrawMode = "InsertAndModify",
         Inputs = {
            Displacement = Input {
               SourceOp = "Path1Displacement",
               Source = "Value",
            },
            PolyLine = Input {
               Value = Polyline {
                  Points = {
                     { LockY = true, X = -0.659525631216526, Y = 0.266666666666667, RX = 0.069750437017999, RY = -0.310121568613253 },
                     { X = -0.367466222606001, Y = -0.360082022511229, LX = -0.152558534574528, LY = 0.00650555195138963, RX = 0.132597806960993, RY = -0.00565436685814299 },
                     { X = -0.161752694460984, Y = 0.24544014067066, LX = -0.130062824820117, LY = -0.04622072163203, RX = 0.149857426386679, RY = 0.0532551741751792 },
                     { X = 0.241043759103759, Y = -0.14383444743497, LX = -0.152530382846402, LY = 0.0167804342984283, RX = 0.153740929406844, RY = -0.0169136110245572 },
                     { LockY = true, X = 0.67176740627391, Y = 0.153741496598639, LX = -0.138491358881654, LY = -0.157244777529083 }
                  }
               },
            },
         },
      },
      Path1Displacement = BezierSpline {
         SplineColor = { Red = 255, Green = 0, Blue = 255 },
         NameSet = true,
         KeyFrames = {
            [0] = { 0, RH = { 16.6666666666667, 0.333333333333333 }, Flags = { Linear = true, LockedY = true } },
            [50] = { 1, LH = { 33.3333333333333, 0.666666666666667 }, Flags = { Linear = true, LockedY = true } }
         }
      },
      Transform2 = Transform {
         CtrlWZoom = false,
         Inputs = {
            Center = Input {
               SourceOp = "Offset1",
               Source = "Position",
            },
            Size = Input { Value = 0.33, },
            Input = Input {
               SourceOp = "Red",
               Source = "Output",
            },
         },
         ViewInfo = OperatorInfo { Pos = { 275, 82.5 } },
      },
      Offset1 = Offset {
         CtrlWZoom = false,
         Inputs = {
            Position = Input {
               SourceOp = "Path1",
               Source = "Position",
            },
            Offset = Input { Value = { 0, 0 }, },
            PositionTimeOffset = Input { Value = -50, },
         },
      },
      Red = Background {
         NameSet = true,
         Inputs = {
            GlobalOut = Input { Value = 100, },
            Width = Input { Value = 1920, },
            Height = Input { Value = 1080, },
            ["Gamut.SLogVersion"] = Input { Value = FuID { "SLog2" }, },
            TopLeftRed = Input { Value = 1, },
         },
         ViewInfo = OperatorInfo { Pos = { 165, 82.5 } },
      },
      Merge1 = Merge {
         Inputs = {
            Background = Input {
               SourceOp = "Background1",
               Source = "Output",
            },
            Foreground = Input {
               SourceOp = "Transform1",
               Source = "Output",
            },
            PerformDepthMerge = Input { Value = 0, },
         },
         ViewInfo = OperatorInfo { Pos = { 660, 49.5 } },
      },
      Merge2 = Merge {
         Inputs = {
            Background = Input {
               SourceOp = "Merge1",
               Source = "Output",
            },
            Foreground = Input {
               SourceOp = "Transform2",
               Source = "Output",
            },
            PerformDepthMerge = Input { Value = 0, },
         },
         ViewInfo = OperatorInfo { Pos = { 825, 82.5 } },
      }
   }
}

Sander de Regt, Thank you very much! You're great! I was looking for the solution long time

Could you help me with second task please? I'm looking a solution to change size an object, when particles (in my case is circles) from emitter shot at it every time. The Object has a mask for pKill. I know I can change size for each shots in splines, but it's too long. I think there's better solution. Maybe with using expression or scripts.
Thanks.