GFX.BuiltinFeature

Name	-	Description	Default	Type
<input>
<output>				GFX.Feature
Id		Builtin feature id.	BuiltinFeatureId.Transform	BuiltinFeatureId

Details

This shard generates features with preset behavior, the behavior depends on the Id.

Built-in Feature Ids

Transform

This Feature implements basic world/view/projection transform.

Here are the entry points that are defined and can be added as dependencies by your own features.

initLocalPosition (vertex)

Sets the localPosition (float4) global from the vertex position.

initScreenPosition (vertex)

Sets the screenPosition global (float4) to the transformed vertex position (=proj*view*world*<vertex>).

writePosition (vertex)

Writes screenPosition global to position output.

initWorldNormal (vertex)

Transforms the object normal and writes the transformed result into the worldNormal global (float3). If the mesh doesn't have vertex normals, the normal will be (0.0, 0.0, 1.0).

writeNormal (vertex)

Writes worldNormal global into worldNormal output.

BaseColor

This Feature adds a per-object shader parameter with the name baseColor and a texture parameter with the same name.

Here are the entry points that are defined and can be added as dependencies by your own features.

initColor (vertex)

This vertex shader entry point sets up the color global (float4) with the vertex color from the mesh if it has been set. If the mesh doesn't have a vertex color, it'll be white with alpha 1.0.

writeColor (vertex)

Writes color global to color output.

readColor (fragment)

Reads color input into color global (float4).

textureColor (fragment)

Reads the texture color from the baseColor texture and multiplies it with the current color global. It does nothing if the texture does not exist.

writeColor (fragment)

Writes color global to color output. color is the default name for the main color output from the fragment shader.

VertexColorFromNormal

This Feature outputs the mesh normal as a per-vertex color output.

Use for debugging.

Wireframe

This Feature changes how objects are rendered so that their edges are highlighted. Very basic, with a fixed edge width and color.

Use for debugging.

Velocity

This Feature outputs per-object velocity into a velocity output and velocity global. For usage with effects that require a velocity buffer such as motion blur or temporal anti-aliasing.

---