Add Colour - Revision history

Redmaw: Corrected explanation for how Clamp high colour and Clamp low colours work. Not clamped to black and white, but to the values designated in the settings themselves.

2022-02-02T20:05:43Z

Corrected explanation for how Clamp high colour and Clamp low colours work. Not clamped to black and white, but to the values designated in the settings themselves.

Redmaw: Reformatted layout of examples under Overview section, temporarily removing table of content and Fun With section until additional examples are created.

2022-01-28T23:16:22Z

Reformatted layout of examples under Overview section, temporarily removing table of content and Fun With section until additional examples are created.

Redmaw: Removed text overlays from images in favor of text descriptions between example images.

2022-01-28T20:25:54Z

Removed text overlays from images in favor of text descriptions between example images.

Matt: Minor edit to first sentence

2022-01-21T02:08:50Z

Minor edit to first sentence

Matt: Made opening more specific to Add Colour

2022-01-21T01:35:39Z

Made opening more specific to Add Colour

Redmaw: Updated descriptions and added example images.

2021-12-29T03:56:41Z

Updated descriptions and added example images.

JavaJones at 18:26, 1 June 2011

2011-06-01T18:26:33Z

JavaJones at 00:53, 18 May 2011

2011-05-18T00:53:17Z

JavaJones at 23:28, 17 May 2011

2011-05-17T23:28:32Z

JavaJones at 21:19, 17 May 2011

2011-05-17T21:19:33Z

@@ Line 28: / Line 28: @@
-Although it’s possible for a component value to exceed the visual range of colours from pure black (0,0,0) to pure white (1,1,1), this is not recommended.  In some shaders, such as the Power Fractal v3 shader, parameters exist to clamp the component values at black or white.  In the example below, the Main input contributes red values, and Input 2 contributes values that range less than zero and greater than 1.  The Add Colour node will output values exceeding zero to 1 because the checkboxes for clamping the high and low colour values between zero or 1 are unchecked.  The result is that colours on the terrain appear unnaturally dark, almost burnt, where the colour values are below zero.  Where they exceed 1, clipping can occur or unnatural shades of colour, such as the magenta areas.
+Although it’s possible for a component value to exceed the visual range of colours from pure black (0,0,0) to pure white (1,1,1), this is not recommended.  In some shaders, such as the Power Fractal v3 shader, parameters exist to clamp the component values at the values designated in the Apply high colour and Apply low colour settings.  In the example below, the Main input contributes red values, and Input 2 contributes values that range from less than zero to greater than 1.  The Add Colour node will output values exceeding zero to 1 because the Clamp high colour and Clamp low colour checkboxes in the Power fractal shader are unchecked.  The result is that colours on the terrain appear unnaturally dark, almost burnt, where the colour values are below zero.  Where they exceed 1, clipping can occur or unnatural shades of colour, such as the magenta areas.
 <ul>
 [[File:AddColour_09_AddColourExceed.jpg|none|800px|When the evaluated component values (RGB) exceed the 0 to 1 range, the resulting colours can appear clipped or burnt in. ]]

@@ Line 1: / Line 1: @@
 [[File:AddColour_00_GUI.png|none|470px|Add Colour]]
+<!-- __TOC__ -->
 == Overview ==
 The Add family of nodes allow you to add the colour/scalar/vector coming into the Main Input with the color/scalar/vector coming into Input 2.
 With Add Colour the addition is component-wise:
+<ul>
 Main Input.red + Input 2.red <br /n>
 Main Input.green + Input 2.green <br /n>
 Main Input.blue + Input 2.blue
+</ul>
@@ Line 45: / Line 28: @@
-Although it’s possible for a component value to exceed the visual range of colours from pure black (0,0,0) to pure white (1,1,1), this is not recommended.  In some shaders, such as the Power Fractal v3 shader, parameters exist to clamp the component values at black or white.
+Although it’s possible for a component value to exceed the visual range of colours from pure black (0,0,0) to pure white (1,1,1), this is not recommended.  In some shaders, such as the Power Fractal v3 shader, parameters exist to clamp the component values at black or white.  In the example below, the Main input contributes red values, and Input 2 contributes values that range less than zero and greater than 1.  The Add Colour node will output values exceeding zero to 1 because the checkboxes for clamping the high and low colour values between zero or 1 are unchecked.  The result is that colours on the terrain appear unnaturally dark, almost burnt, where the colour values are below zero.  Where they exceed 1, clipping can occur or unnatural shades of colour, such as the magenta areas.
 <ul>
 [[File:AddColour_09_AddColourExceed.jpg|none|800px|When the evaluated component values (RGB) exceed the 0 to 1 range, the resulting colours can appear clipped or burnt in. ]]
 </ul>

@@ Line 31: / Line 31: @@
 Remember that each of the colour component values, the red, green, and blue channel values, from the Main Input and the Input 2 settings are added together to achieve the final result.
 <ul>
-{|
+[[File:AddColour_07_AddColour.jpg|none|800px|The Add Colour node adds the component colour values from the Main Input and Input 2.]]
 </ul>
-It’s possible for the component values to exceed the visual range of colours from pure black (0,0,0) to pure white (1,1,1), although this is not recommended, and in some shaders such as the Power Fractal v3 shader, parameters exist to clamp the colour component values at black or white.
+In the image below, the Main Input contributes red values, while Input 2 contributes values ranging from black to green, or component-wise, ranging from (0,0,0) to (0,1,0).  The output of the Add Colour node results in red wherever pure black occured in Input 2, because red (1,0,0) plus black (0,0,0) equals red (1,0,0).  Wherever a shade of green occurs in Input 2, the result is a shade of yellow, because red (1,0,0) plus green (0,1,0) equals yellow (1,1,0).  Shades of yellow exist because the Power Fractal noise pattern produces a range of values between 0 and 1.
-In the example below, colours of the terrain appear unnaturally dark, almost burnt, when their colour component values are below 0,0,0.  When component values exceed pure white, this can lead to clipping or unnatural shades of colour, such as the magenta areas in the image below.
 <ul>
-[[File:AddColour_06_AddColourExceed.jpg|none|800px|When the evaluated component values (RGB) exceed the 0 to 1 range, the resulting colours can appear clipped or burnt in. ]]
+[[File:AddColour_09_AddColourExceed.jpg|none|800px|When the evaluated component values (RGB) exceed the 0 to 1 range, the resulting colours can appear clipped or burnt in. ]]
 </ul>

@@ Line 6: / Line 6: @@
 == Overview ==
-The Add family of nodes allow you to add the colour/scalar/vector coming into the Main Input by the color/scalar/vector coming into Input 2.
+The Add family of nodes allow you to add the colour/scalar/vector coming into the Main Input with the color/scalar/vector coming into Input 2.
 With Add Colour the addition is component-wise:

← Older revision		Revision as of 01:35, 21 January 2022
Line 6:		Line 6:
	== Overview ==		== Overview ==

−	The Add family of nodes allow you to add the colour/scalar/vector coming into the Main Input by the color/scalar/vector coming into Input 2. ~~The~~ addition is component-wise~~, for example with colour~~:	+	The Add family of nodes allow you to add the colour/scalar/vector coming into the Main Input by the color/scalar/vector coming into Input 2.
		+
		+	With Add Colour the addition is component-wise:

← Older revision		Revision as of 18:26, 1 June 2011
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	All nodes in this family have just the one setting, which lets you choose a node for Input 2.		All nodes in this family have just the one setting, which lets you choose a node for Input 2.

−	[[Category: Add\| ]]	+	[[Category: Add]]

← Older revision		Revision as of 00:53, 18 May 2011
Line 15:		Line 15:
	All nodes in this family have just the one setting, which lets you choose a node for Input 2.		All nodes in this family have just the one setting, which lets you choose a node for Input 2.

−	[[Category: Add]]	+	[[Category: Add\| ]]

← Older revision		Revision as of 23:28, 17 May 2011
Line 15:		Line 15:
	All nodes in this family have just the one setting, which lets you choose a node for Input 2.		All nodes in this family have just the one setting, which lets you choose a node for Input 2.

−	~~[[Category: Function Nodes]]~~
	[[Category: Add]]		[[Category: Add]]

@@ Line 1: / Line 1: @@
 [[Image:drex_module_41_image_0.png|485pxpx|Add Colour]]
 '''Node Description & Purpose:'''
@@ Line 18: / Line 14: @@
 '''Settings:'''
 All nodes in this family have just the one setting, which lets you choose a node for Input 2.