Warp Input Shader - Revision history

Redmaw: Restored formatting of Overview section.

2021-08-03T16:43:31Z

Restored formatting of Overview section.

← Older revision		Revision as of 16:43, 3 August 2021
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	== Overview ==		==Overview==
	The Warp Input Shader and Warp Merge shader perform a domain distortion on any shaders which are upstream from its Main input connection using the displacement vectors from the shader attached to its Warper input.		The Warp Input Shader and Warp Merge shader perform a domain distortion on any shaders which are upstream from its Main input connection using the displacement vectors from the shader attached to its Warper input.
	It does this by offsetting the texture coordinates before they are used by the input shaders. While this looks like the warper bends the final result, it's actually bending the space before it is read by the shader.		It does this by offsetting the texture coordinates before they are used by the input shaders. While this looks like the warper bends the final result, it's actually bending the space before it is read by the shader.
	A simplistic way to think about it is that the shapes from the warper will bend the final texture (but in the opposite direction)		A simplistic way to think about it is that the shapes from the warper will bend the final texture (but in the opposite direction).


	The difference between the Warp Input Shader and the Warp Merge Shader is:		The difference between the Warp Input Shader and the Warp Merge Shader is:
	The Warp Input Shader warps the shader attached to the Main input and any shaders further upstream of the Main input.		* The Warp Input Shader warps the shader attached to the Main input and any shaders further upstream of the Main input.
	The Warp Merge Shader warps the shader attached to the Shader input and any shaders further upstream of that input (in other words a "side branch"). It merges the side branch with the main input, but only the side branch is warped.		* The Warp Merge Shader warps the shader attached to the Shader input and any shaders further upstream of that input (in other words a "side branch"). It merges the side branch with the main input, but only the side branch is warped.


	When the Warp Input Shader is asked to shade or displace a point, the following happens. First, the shader attached to Warper is called to produce a displacement vector. To produce the warp effect the warper must be a displacement shader or a network of shaders producing displacement. The displacement is not applied to the surface; its vector is merely stored for the next step. Next, the texture coordinates ("position in texture") are offset by the displacement vector, and the main input shaders are called. The main input shaders now produce different results because they work with modified texture coordinates. Finally, the texture coordinates are reset so that shaders following the Warp Input Shader will not be affected.		When the Warp Input Shader is asked to shade or displace a point, the following happens. First, the shader attached to Warper is called to produce a displacement vector. To produce the warp effect the warper must be a displacement shader or a network of shaders producing displacement. The displacement is not applied to the surface; its vector is merely stored for the next step. Next, the texture coordinates ("position in texture") are offset by the displacement vector, and the main input shaders are called. The main input shaders now produce different results because they work with modified texture coordinates. Finally, the texture coordinates are reset so that shaders following the Warp Input Shader will not be affected.


	{\|		{\|

Redmaw: Added example images for Warp input shader, and conformed to new layout.

2021-08-03T02:55:05Z

Added example images for Warp input shader, and conformed to new layout.

← Older revision		Revision as of 02:55, 3 August 2021
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			[[File:WarpInput_00_GUI.png\|none\|470px \|Warp Input Shader]]

	The Warp Input Shader performs a domain distortion on any shaders which are upstream (via its main input connection), using the displacement vectors from the shader attached to its '''Warper''' input. It does this by offsetting the texture coordinates before they are used by the input shaders. This almost looks like the warper bends the final result, but it's actually bending the space before it is read by the shader. A simplistic way you can think about it is that the shapes from the warper will bend the final texture (but in the opposite direction).

	The difference between the Warp Input Shader and the [[Warp Merge Shader]] is:		== Overview ==
			The Warp Input Shader and Warp Merge shader perform a domain distortion on any shaders which are upstream from its Main input connection using the displacement vectors from the shader attached to its Warper input.
			It does this by offsetting the texture coordinates before they are used by the input shaders. While this looks like the warper bends the final result, it's actually bending the space before it is read by the shader.
			A simplistic way to think about it is that the shapes from the warper will bend the final texture (but in the opposite direction)
			The difference between the Warp Input Shader and the Warp Merge Shader is:
			The Warp Input Shader warps the shader attached to the Main input and any shaders further upstream of the Main input.
			The Warp Merge Shader warps the shader attached to the Shader input and any shaders further upstream of that input (in other words a "side branch"). It merges the side branch with the main input, but only the side branch is warped.
			When the Warp Input Shader is asked to shade or displace a point, the following happens. First, the shader attached to Warper is called to produce a displacement vector. To produce the warp effect the warper must be a displacement shader or a network of shaders producing displacement. The displacement is not applied to the surface; its vector is merely stored for the next step. Next, the texture coordinates ("position in texture") are offset by the displacement vector, and the main input shaders are called. The main input shaders now produce different results because they work with modified texture coordinates. Finally, the texture coordinates are reset so that shaders following the Warp Input Shader will not be affected.

	* The ~~Warp Input Shader warps~~ the shader ~~attached to~~ the ~~main input ('''Input node''')~~ and ~~any shaders further upstream of~~ the ~~main~~ input.		{\|
	* The [[~~Warp Merge Shader]] warps~~ the shader ~~attached~~ to the ~~'''Shader'''~~ input and ~~any shaders further upstream of that input (in other words a "side branch"). It merges~~ the ~~side branch with~~ the ~~main~~ input~~, but only the side branch is warped~~.		\|-
			\| [[File:WarpInput_01_On.jpg\|none\|800px\|The texture coordinates as seen from the render camera’s point of view, followed by the unwarped landscape, and then the result of warping via a Power fractal shader. Note that the red and dark blue axis lines are not affected by the warp as they are located downstream from the Warp input node.
			]]
			\|-
			\| [[File:WarpInput_02_On.jpg\|none\|800px\|A closer view of the texture coordinates being warped by a Power fractal shader assigned to the Warp input shader. Note that the red and dark blue axis lines are not affected by the warp as they are located downstream from the Warp input node.
			]]
			\|}


	~~When the Warp Input Shader is asked to shade or displace a point, the following happens. First, the shader attached to~~ '''~~Warper~~''' ~~is called to produce~~ a ~~displacement~~ vector~~. To produce the warp effect the~~ warper ~~must be~~ a ~~displacement shader~~ or a ~~network of shaders producing~~ displacement. ~~The displacement is not applied to~~ the ~~surface; its vector is merely stored for~~ the ~~next step~~. ~~Next,~~ the ~~texture coordinates ("position in texture") are offset by~~ the displacement ~~vector~~, ~~and~~ the ~~main input shaders are called~~. ~~The main input shaders now produce different results because they work with modified texture coordinates. Finally~~, ~~the texture coordinates are reset so that shaders following the Warp Input Shader will~~ not ~~be affected~~.		'''Tip 1:''' If you have a colour shader, colour function, scalar function or vector function that you want to use as your warper, you can turn it into displacement using a [[Displacement Shader]] or a [[Vector Displacement Shader]]. If you want to use a shader that already produces displacement, you can connect it directly.


			'''Tip 2:''' You may see the Warp Input Shader and the [[Redirect Shader]] used in the same context. The reason the Warp Input Shader and the [[Redirect Shader]] often work well together is because the [[Redirect Shader]] allows you to construct displacement vectors which go in all directions, which can be useful for warping a 3D function such as the Power Fractal. If you just use a single fractal operating along the normal as your warper, you might not easily see its warping effect.


	'''~~Tip 1~~:''' If you have a colour shader, colour function, scalar function or vector function that you want to use as your warper, you can turn it into displacement using a [[Displacement Shader]] or a [[Vector Displacement Shader]]. If you want to use a shader that already produces displacement, you can connect it directly.		'''Settings:'''

			*'''Name:''' This setting allows you to apply a descriptive name to the node, which can be helpful when using multiple Warp Input shader nodes in a project.

	'''~~Tip 2~~:''' ~~You may see~~ the ~~Warp Input Shader~~ and the ~~[[Redirect Shader]] used in~~ the ~~same context~~. ~~The reason the Warp Input Shader and~~ the ~~[[Redirect Shader]] often work well together~~ is because the [[Redirect Shader]] allows you to construct displacement vectors which go in all directions, which can be useful for warping a 3D function such as the Power Fractal. If you just use a single fractal operating along the normal as your warper, you might not easily see its warping effect.		*'''Enable:''' When checked, the node is active and the settings below will affect the surface. When unchecked, the node is ignored.

			*'''Warper:''' The shader or function nodes assigned to this setting generate the displacement vectors used to warp or distort the texture space for all the nodes upstream from its position in the node network, downstream nodes are unaffected.
			<ul>
			[[File:WarpInput_03_VariousInputs.jpg\|none\|800px\|Various shaders assigned as the Warper to illustrate the many ways in which the texture coordinates can be manipulated. Note that the red and dark blue axis lines are not affected by the warp as they are located downstream from the Warp input node.]]
			</ul>

	~~===Exceptions===~~

			== Exceptions==
	Some shaders are not always affected by warp shaders, depending on their settings:		Some shaders are not always affected by warp shaders, depending on their settings:

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	* Twist and Shear Shader - uses world space		* Twist and Shear Shader - uses world space
	* Visualise Normal - normals are not changed by warp shaders		* Visualise Normal - normals are not changed by warp shaders


	~~===Settings===~~
	~~<ul>~~
	~~<li>~~
	~~'''Warper:''' The shader attached to this input generates displacement vectors that define the warp or distortion which affects the main input.~~
	~~</li>~~
	~~</ul>~~

Matt at 01:57, 4 May 2018

2018-05-04T01:57:48Z

← Older revision		Revision as of 01:57, 4 May 2018
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	[[Category:~~Other~~ Shader]]		[[Category:Warp Shader]]

Matt at 03:25, 7 November 2017

2017-11-07T03:25:06Z

← Older revision		Revision as of 03:25, 7 November 2017
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	When the Warp Input Shader is asked to shade or displace a point, the following happens. First, the shader attached to '''Warper''' is called to produce a displacement vector. To produce the warp effect the warper must be a displacement shader or a network of shaders producing displacement. The displacement is not applied to the surface; its vector is merely stored for the next step. Next, the texture coordinates ("position in texture") are offset by the displacement vector, and the main input shaders are called. The main input shaders now produce different results because they work with modified texture coordinates. Finally, the texture coordinates are reset so that shaders following the Warp Input Shader will not be affected.		When the Warp Input Shader is asked to shade or displace a point, the following happens. First, the shader attached to '''Warper''' is called to produce a displacement vector. To produce the warp effect the warper must be a displacement shader or a network of shaders producing displacement. The displacement is not applied to the surface; its vector is merely stored for the next step. Next, the texture coordinates ("position in texture") are offset by the displacement vector, and the main input shaders are called. The main input shaders now produce different results because they work with modified texture coordinates. Finally, the texture coordinates are reset so that shaders following the Warp Input Shader will not be affected.

	If you have a colour shader, colour function, scalar function or vector function that you want to use as your warper, you can turn it into displacement using a [[Displacement Shader]] or a [[Vector Displacement Shader]]. If you want to use a shader that already produces displacement, you can connect it directly.

	You may see the Warp Input Shader and the [[Redirect Shader]] used in the same context. The reason the Warp Input Shader and the [[Redirect Shader]] often work well together is because the [[Redirect Shader]] allows you to construct displacement vectors which go in all directions, which can be useful for warping a 3D function such as the Power Fractal. If you just use a single fractal operating along the normal as your warper, you might not easily see its warping effect.		'''Tip 1:''' If you have a colour shader, colour function, scalar function or vector function that you want to use as your warper, you can turn it into displacement using a [[Displacement Shader]] or a [[Vector Displacement Shader]]. If you want to use a shader that already produces displacement, you can connect it directly.


			'''Tip 2:''' You may see the Warp Input Shader and the [[Redirect Shader]] used in the same context. The reason the Warp Input Shader and the [[Redirect Shader]] often work well together is because the [[Redirect Shader]] allows you to construct displacement vectors which go in all directions, which can be useful for warping a 3D function such as the Power Fractal. If you just use a single fractal operating along the normal as your warper, you might not easily see its warping effect.


	===Exceptions===		===Exceptions===

Matt: Some reformatting

2017-11-07T03:17:05Z

Some reformatting

← Older revision		Revision as of 03:17, 7 November 2017
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	~~'''Node Description and Purpose:'''<br />~~
	The Warp Input Shader performs a domain distortion on any shaders which are upstream (via its main input connection), using the displacement vectors from the shader attached to its '''Warper''' input. It does this by offsetting the texture coordinates before they are used by the input shaders. This almost looks like the warper bends the final result, but it's actually bending the space before it is read by the shader. A simplistic way you can think about it is that the shapes from the warper will bend the final texture (but in the opposite direction).		The Warp Input Shader performs a domain distortion on any shaders which are upstream (via its main input connection), using the displacement vectors from the shader attached to its '''Warper''' input. It does this by offsetting the texture coordinates before they are used by the input shaders. This almost looks like the warper bends the final result, but it's actually bending the space before it is read by the shader. A simplistic way you can think about it is that the shapes from the warper will bend the final texture (but in the opposite direction).

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	You may see the Warp Input Shader and the [[Redirect Shader]] used in the same context. The reason the Warp Input Shader and the [[Redirect Shader]] often work well together is because the [[Redirect Shader]] allows you to construct displacement vectors which go in all directions, which can be useful for warping a 3D function such as the Power Fractal. If you just use a single fractal operating along the normal as your warper, you might not easily see its warping effect.		You may see the Warp Input Shader and the [[Redirect Shader]] used in the same context. The reason the Warp Input Shader and the [[Redirect Shader]] often work well together is because the [[Redirect Shader]] allows you to construct displacement vectors which go in all directions, which can be useful for warping a 3D function such as the Power Fractal. If you just use a single fractal operating along the normal as your warper, you might not easily see its warping effect.

			===Exceptions===

	Some shaders are not always affected by warp shaders, depending on their settings:		Some shaders are not always affected by warp shaders, depending on their settings:
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	~~'''Node Type:''' Other Shader<br />~~		===Settings===


	~~'''~~Settings~~:'''<br />~~
	<ul>		<ul>
	<li>		<li>

Matt at 03:13, 7 November 2017

2017-11-07T03:13:38Z

← Older revision		Revision as of 03:13, 7 November 2017
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	* The [[Warp Merge Shader]] warps the shader attached to the '''Shader''' input and any shaders further upstream of that input (in other words a "side branch"). It merges the side branch with the main input, but only the side branch is warped.		* The [[Warp Merge Shader]] warps the shader attached to the '''Shader''' input and any shaders further upstream of that input (in other words a "side branch"). It merges the side branch with the main input, but only the side branch is warped.

	~~See also: [[Warp Merge Shader]]~~

	When the Warp Input Shader is asked to shade or displace a point, the following happens. First, the shader attached to '''Warper''' is called to produce a displacement vector. To produce the warp effect the warper must be a displacement shader or a network of shaders producing displacement. The displacement is not applied to the surface; its vector is merely stored for the next step. Next, the texture coordinates ("position in texture") are offset by the displacement vector, and the main input shaders are called. The main input shaders now produce different results because they work with modified texture coordinates. Finally, the texture coordinates are reset so that shaders following the Warp Input Shader will not be affected.		When the Warp Input Shader is asked to shade or displace a point, the following happens. First, the shader attached to '''Warper''' is called to produce a displacement vector. To produce the warp effect the warper must be a displacement shader or a network of shaders producing displacement. The displacement is not applied to the surface; its vector is merely stored for the next step. Next, the texture coordinates ("position in texture") are offset by the displacement vector, and the main input shaders are called. The main input shaders now produce different results because they work with modified texture coordinates. Finally, the texture coordinates are reset so that shaders following the Warp Input Shader will not be affected.
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	</li>		</li>
	</ul>		</ul>


			See also: [[Warp Merge Shader]]


	[[Category:Other Shader]]		[[Category:Other Shader]]

Matt at 03:02, 7 November 2017

2017-11-07T03:02:32Z

← Older revision		Revision as of 03:02, 7 November 2017
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	* The Warp Input Shader warps the shader attached to the main input ('''Input node''') and any shaders further upstream of the main input.		* The Warp Input Shader warps the shader attached to the main input ('''Input node''') and any shaders further upstream of the main input.
	* The [[Warp Merge Shader]] warps the shader attached to the '''Shader''' input and any shaders further upstream of that input (in other words a "side branch"). It merges the side branch with the main input, but ~~it warps~~ only the side branch~~, not the main input~~.		* The [[Warp Merge Shader]] warps the shader attached to the '''Shader''' input and any shaders further upstream of that input (in other words a "side branch"). It merges the side branch with the main input, but only the side branch is warped.

	See also: [[Warp Merge Shader]]		See also: [[Warp Merge Shader]]

Matt at 03:00, 7 November 2017

2017-11-07T03:00:52Z

← Older revision		Revision as of 03:00, 7 November 2017
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	The difference between the Warp Input Shader and the [[Warp Merge Shader]] is:		The difference between the Warp Input Shader and the [[Warp Merge Shader]] is:

	* The Warp Input Shader warps the shader attached to the main input ('''Input node''') and any shaders further upstream of ~~that~~ input.		* The Warp Input Shader warps the shader attached to the main input ('''Input node''') and any shaders further upstream of the main input.
	* The [[Warp Merge Shader]] warps the shader attached to the '''Shader''' input and any shaders further upstream of that input. It merges a side branch ~~of shaders~~ with the input, but it warps only the side branch, not the main input.		* The [[Warp Merge Shader]] warps the shader attached to the '''Shader''' input and any shaders further upstream of that input (in other words a "side branch"). It merges the side branch with the main input, but it warps only the side branch, not the main input.

	See also: [[Warp Merge Shader]]		See also: [[Warp Merge Shader]]

Matt at 02:57, 7 November 2017

2017-11-07T02:57:28Z

← Older revision		Revision as of 02:57, 7 November 2017
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	* The Warp Input Shader warps the shader attached to the main input ('''Input node''') and any shaders further upstream of that input.		* The Warp Input Shader warps the shader attached to the main input ('''Input node''') and any shaders further upstream of that input.
	* The [[Warp Merge Shader]] warps the shader attached to the '''Shader''' input and any shaders further upstream of that input. ~~In other words it~~ merges a side branch of shaders ~~and~~ warps the side branch, not the main input.		* The [[Warp Merge Shader]] warps the shader attached to the '''Shader''' input and any shaders further upstream of that input. It merges a side branch of shaders with the input, but it warps only the side branch, not the main input.

	See also: [[Warp Merge Shader]]		See also: [[Warp Merge Shader]]

Matt at 02:48, 7 November 2017

2017-11-07T02:48:06Z

← Older revision		Revision as of 02:48, 7 November 2017
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	* The Warp Input Shader warps the shader attached to the main input ('''Input node''') and any shaders further upstream of that input.		* The Warp Input Shader warps the shader attached to the main input ('''Input node''') and any shaders further upstream of that input.
	* The [[Warp Merge Shader]] warps the shader attached to the '''Shader''' input and any shaders further upstream of that input.		* The [[Warp Merge Shader]] warps the shader attached to the '''Shader''' input and any shaders further upstream of that input. In other words it merges a side branch of shaders and warps the side branch, not the main input.

	See also: [[Warp Merge Shader]]		See also: [[Warp Merge Shader]]