Smooth

The Grid Editor | Tools | Smooth command in the grid editor smooths grid node values within the brush with a moving 3x3 average filter. Click the Grid Editor | Tools | Smooth command or the button to enable Smooth mode. The cursor changes to a crosshair with a circle to visually indicate the Brush size . The Smooth command button is highlighted in yellow to indicate smooth mode as well.

Click to smooth values within the brush circle. Click and drag to continuously smooth grid values as the cursor moves across the grid. The grid Nodes, Labels, Color Fill, and Contours update automatically as you use the Smooth command.

Press ESC or click another Grid Editor | Tools command to end Smooth mode.

Tool Options

The Brush size, Density, and Pressure control how the Smooth tool smooths the grid vales.

Brush Size

The Brush size tool option controls the diameter of the tool. The Brush size specifies the diameter in number of grid cells in the X direction. The Brush size setting is located in the tools options bar at the top of the grid editor window. There are three methods for changing the Brush size:

Click in the Brush size field and type the desired Brush size.
Click the buttons to increment the Brush size by one. Click and hold the buttons to quickly scroll the Brush size value up or down.
Press the [ key to decrease the Brush size. Press the ] key to increase the Brush size. Press and hold the [ or ] key to quickly decrease or increase the Brush size. The [ and ] keys increment the Brush size by 1 at Brush size values less than 10. The increment increases to 5 at a Brush size greater than 10 and less than 50. The increment increases to 10 at a Brush size greater than 50 and less than 100. The increment size continues to increase as the Brush size increases.

The cursor circle increases or decreases size with the Brush size setting and zoom level. The Brush size setting is saved and persistent across multiple grid editor windows.


A Brush size of 1 makes the diameter of the brush equal to the horizontal spacing of one grid cell.	A Brush size of 3 makes the diameter of the brush equal to the horizontal spacing of three grid cells.

Density

The Density tool option controls the weighting of the tool effect radially from the center of the brush. The cursor location (where the crosshair is located) receives the maximum effect of the selected tool mode. The Density setting is located in the tools options bar at the top of the grid editor window. There are two methods for changing the Density:

Click in the Density field and type the desired Density.
Click the buttons to increment the Density by one. Click and hold the buttons to quickly scroll the Density value up or down.

The Density setting can be any value between 1 and 100. A Density setting of 1 has maximum "feathering" or blending between the center of the brush and values just outside the brush. A Density setting of 100 applies the tool mode effect to all nodes within the brush equally. The Density setting is saved and persistent across multiple grid editor windows. The default Density setting is 25.

These line plots show how Density affects the weighting of the tool mode effect

(y-axis) as distance from the center of the brush increases (x-axis)

Pressure

The Pressure tool option controls the speed at which tool effects are applied as the brush moves. The Pressure setting is located in the tools options bar at the top of the grid editor window. There are two methods for changing the Pressure:

Click in the Pressure field and type the desired Pressure.
Click the buttons to increment the Pressure by one. Click and hold the buttons to quickly scroll the Pressure value up or down.

The Pressure setting can be any value between 1 and 100. A Pressure setting of 1 applies the tool effect the minimum amount with each click or drag. A Pressure setting of 100 applies the tool effect the maximum amount with each click or drag. The Pressure setting is saved and persistent across multiple grid editor windows. The default Pressure setting is 25.

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