How to specify center of shape in KineticJS?

@samara 

To specify the center of a shape in KineticJS, you can use the offset property of the shape. The offset property allows you to set the center of the shape relative to its position coordinates.

Here's an example of how you can specify the center of a shape in KineticJS:

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// Create a new stage and layer
var stage = new Kinetic.Stage({
  container: 'container',
  width: 500,
  height: 500
});

var layer = new Kinetic.Layer();

// Create a circle shape
var circle = new Kinetic.Circle({
  x: 250,
  y: 250,
  radius: 50,
  fill: 'red',
  offset: { x: 25, y: 25 }  // Set the center of the circle
});

// Add the circle to the layer
layer.add(circle);

// Add the layer to the stage
stage.add(layer);

// Draw the stage
stage.draw();

In this example, the offset property of the circle shape is set to { x: 25, y: 25 }, which will place the center of the circle at its (x, y) position plus the offset values (25, 25). This will ensure that the center of the circle is correctly positioned relative to its coordinates.