Unity Products:Amplify Shader Editor/Screen Position

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Screen Position Node

The Screen Position node outputs the screen position of the current pixel. According to the selected Type parameter the position value can be either in Screen Coordinates, [ 0, Screen Width - 1 ] for X axis and [ 0, Screen Height -1 ] for Y axis, or in a normalized [0,1] range for both axis.

Nodes used: Screen Position, Screen Params, Texel Size, Multiply, Component Mask, Texture Sample

Node Parameter	Description	Default Value
Type	Defines how the screen position value should be presented Normalized – Gives you the screen position as values between 0 and 1. The bottom-left corner of the screen is (0,0) and the top-right is (1,1), no matter the screen resolution. Raw – Previously named Screen. Gives you the unprocessed Screen Position values, before it is normalized by dividing by W. The origin (0,0) is at the bottom-left of the screen. Center – Treats the center of the screen as (0,0). Values range from –1 to 1 across the screen, which is useful for effects that radiate from the middle. Z and W are not used. Tiled – Similar to Center mode, but the coordinates repeat in a tiled pattern. This is useful for looping or repeating screen-space effects. Z and W are not used. Pixel – Gives you the screen position in actual pixel units. The bottom-left corner is (0,0), and the maximum values depend on the screen resolution. Unlike Normalized mode, these values change when the screen size changes. Z and W are not used.	Normalized

Output Port	Description	Type
XYZW	Returns the Screen Position value	Float4
X	Returns only the X component of the Screen Position	Float
Y	Returns only the Y component of the Screen Position	Float
Z	Returns only the Z component of the Screen Position	Float
W	Returns only the W component of the Screen Position	Float

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