Warp Input Shader - Revision history

Redmaw: Restored formatting of Overview section.

2021-08-03T16:43:31Z

Restored formatting of Overview section.

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.

Matt at 01:57, 4 May 2018

2018-05-04T01:57:48Z

Matt at 03:25, 7 November 2017

2017-11-07T03:25:06Z

Matt: Some reformatting

2017-11-07T03:17:05Z

Some reformatting

Matt at 03:13, 7 November 2017

2017-11-07T03:13:38Z

Matt at 03:02, 7 November 2017

2017-11-07T03:02:32Z

Matt at 03:00, 7 November 2017

2017-11-07T03:00:52Z

Matt at 02:57, 7 November 2017

2017-11-07T02:57:28Z

Matt at 02:48, 7 November 2017

2017-11-07T02:48:06Z

@@ Line 2: / Line 2: @@
-== 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.
 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 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.
 {|

@@ Line 1: / Line 1: @@
-The difference between the Warp Input Shader and the [[Warp Merge Shader]] is:
+== Overview ==
-* 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.
+|-
-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 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:'''
-'''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.
 Some shaders are not always affected by warp shaders, depending on their settings:
@@ Line 37: / Line 58: @@
 * Twist and Shear Shader - uses world space
 * Visualise Normal - normals are not changed by warp shaders

← Older revision		Revision as of 01:57, 4 May 2018
Line 50:		Line 50:


−	[[Category:~~Other~~ Shader]]	+	[[Category:Warp Shader]]

@@ Line 10: / Line 10: @@
 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.
-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.
 ===Exceptions===

@@ Line 1: / Line 1: @@
 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).
@@ Line 14: / Line 13: @@
 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.
 Some shaders are not always affected by warp shaders, depending on their settings:
@@ Line 35: / Line 36: @@
-'''Node Type:''' Other Shader<br />
+===Settings===
 <ul>
 <li>

@@ Line 8: / Line 8: @@
 * 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.
@@ Line 45: / Line 44: @@
 </li>
 </ul>
 [[Category:Other Shader]]

@@ Line 6: / Line 6: @@
 * 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]]

@@ Line 6: / Line 6: @@
 * 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]]