Mirror selected nodes position in flow

Is there a script or trick to mirror on X or Y the selected nodes position in a flow?

Thank you.

Sincerely

/Jon

I don't know of such a trick, but what would you use it for?

And mirror at which line?
A script can be made to achieve that

Just like with pixels or 3d points, you can perform a mirror by subtracting the location of your anchor point from each node's location, multiplying the new x coordinate of each node by -1, then adding the original displacement again to return them to their original location.

To get the location of a tool:
x, y = comp.CurrentFrame.FlowView:GetPos(tool)

To set the location of a tool:
comp.CurrentFrame.FlowView:SetPos(tool, x, y)

To get a list of selected tools:
tools = comp:GetToolList(true)

To perform an operation on each tool in the list:
for i, tool in ipairs(tools) do
<operation>
end


The tricky bit for this script is going to be determining which tool to use as the anchor.

You could do it arbitrarily: Let the script choose whichever tool is at the top of the list as the anchor.

Or you could present a dialogue to ask the user to pick which tool to serve as the anchor.

Or you could let the anchor be determined by a bounding box around the tools—the lower-left corner, for instance. That would require looping through all of the selected tools an additional time in order to get the boundaries.

Here's a script that uses option 1 and mirrors the nodes in the x direction:

Code: Select all

local tools = comp:GetToolList(true)
local offsetX, offsetY = comp.CurrentFrame.FlowView:GetPos(tools[1])
for i, tool in ipairs(tools) do
    local x, y = comp.CurrentFrame.FlowView:GetPos(tool)
    x = (x - offsetX) * -1 + offsetX
    comp.CurrentFrame.FlowView:SetPos(tool, x, y)
end


This needs to be run as a comp script because tool scripts will run once for each selected node, and that's definitely not what you want to happen!