The Subtract node following the Power node subtracts the Inner perimeter from the calculated distance. The following math nodes up to and including the last Power node calculate the distance from the specified point according to the common distance formula. The Separate XYZ separates a vector or position in three values, one for each of X, Y and Z components of the vector/position. The Location output of the Object info node, gives the Object's location in World coordinates. Outer perimeter - The distance at which distance is set to 1 (i.e. Inner perimeter - The threshold at which distance is set to 0 (i.e. Y Origin - The Y coordinate of the point from which to calculate the distance X Origin - The X coordinate of the point from which to calculate the distance The inputs to the node group 1 are as follows: Here's a node setup, which sets the colour based on the distance from a specified point in the XY plane.
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