Blend Section

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Multi-Layer Curve

As shown to the left, some curves are composed of multiple layers.  In these cases the Blend section of the Edit Curve dialog's Edit Layer tab can be used to specify how the currently selected layer will blend with those below it.  This section's properties will be enabled as long as the selected layer isn't the lowest one.

 

The following illustration shows how the two layers shown at the left could be blended to form a unique result.

 

 

Curve Blending

 

 

This section offers the following properties.

 

 

Property

Description

Mode

Specifies the method used to blend the current layer with those below it:

 

Overwrite

Overwrites the lower curves with the current one.  The lower curves will only influence the final result as long as Strength is set to a value below 100.

Add

Adds the current curve to the ones below it.  In other words, if at a given location the current curve has a height of 20% and the lower curves have a height of 30%, the result will have a height of 50%.

Attenuate to 0%

Multiplies the curves so that if the current curve has a height of 0% at a given location, the result will also have a height of 0%.

Attenuate to 50%

Multiplies the curves as if the midline was the zero line.  In other words, if the current curve has a height of 0% at a given location, the result will have a height of 50%.

Attenuate to 100%

Multiplies the curves as if the top edge of the graph was the zero line.  In other words, if the current curve has a height of 0% at a given location, the result will have a height of 100%.

Least

For each point the smaller height of the current curve and the ones below it is used.

Greatest

For each point the larger height of the current curve and the ones below it is used.

Remap Y

The current curve is used to remap the height of the lower curves.  For example, let's suppose that at a given point the lower curves have a height of 20%.  Genetica would then check what height the current curve has at a position that's 20% along the x-axis and use that height instead.

Strength

Controls the extent to which the current layer will influence the ones below it.  From the standpoint of the resulting curve, setting a layer's Strength to 0 is the same as deleting the layer.

 

 

 


Page URL: http://www.spiralgraphics.biz/genetica/help/index.htm?edit_curve_blend_section.htm