README.md

lamina

🍰 An extensible, layer based shader material for ThreeJS

These demos are real, you can click them! They contain the full code, too. 📦 More examples here

Notice

From @farazzshaikh: Lamina has been archived as of April 5 2023.

This project needs maintainers and a good rewrite from scratch. Lamina does a lot of hacky processing to achieve its API goals. As time has gone by I have started to doubt if it’s worth it. These hacks make it unreliable, unpredictable and slow. Not to mentaion, quite convoluted to maintain and debug. There might be better APIs or implimentations for this kind of library but I currently do not have the bandwidth to dedicate to finding them. Perhaps in the future.

Lamina is built on top of three-custom-shader-material (CSM) and any effects that are achieved by lamina can be done with CSM in a predictable and performant manner albeit at a lower level.

Feel free to use Lamina, however, support will be lacking. If you'd like to resurrect this library, then feel free to reach out on our Discord and tag me (Faraz#9759).

---

lamina lets you create materials with a declarative, system of layers. Layers make it incredibly easy to stack and blend effects. This approach was first made popular by the Spline team.

import { LayerMaterial, Depth } from 'lamina'

function GradientSphere() {
  return (
    <Sphere>
      <LayerMaterial
        color="#ffffff" //
        lighting="physical"
        transmission={1}
      >
        <Depth
          colorA="#810000" //
          colorB="#ffd0d0"
          alpha={0.5}
          mode="multiply"
          near={0}
          far={2}
          origin={[1, 1, 1]}
        />
      </LayerMaterial>
    </Sphere>
  )
}

Show Vanilla example

Lamina can be used with vanilla Three.js. Each layer is just a class.

import { LayerMaterial, Depth } from 'lamina/vanilla'

const geometry = new THREE.SphereGeometry(1, 128, 64)
const material = new LayerMaterial({
  color: '#d9d9d9',
  lighting: 'physical',
  transmission: 1,
  layers: [
    new Depth({
      colorA: '#002f4b',
      colorB: '#f2fdff',
      alpha: 0.5,
      mode: 'multiply',
      near: 0,
      far: 2,
      origin: new THREE.Vector3(1, 1, 1),
    }),
  ],
})

const mesh = new THREE.Mesh(geometry, material)

Note: To match the colors of the react example, you must convert all colors to Linear encoding like so:

new Depth({
  colorA: new THREE.Color('#002f4b').convertSRGBToLinear(),
  colorB: new THREE.Color('#f2fdff').convertSRGBToLinear(),
  alpha: 0.5,
  mode: 'multiply',
  near: 0,
  far: 2,
  origin: new THREE.Vector3(1, 1, 1),
}),

Layers

LayerMaterial

LayerMaterial can take in the following parameters:

Prop	Type	Default
name	string	"LayerMaterial"
color	THREE.ColorRepresentation | THREE.Color	"white"
alpha	number	1
lighting	'phong' | 'physical' | 'toon' | 'basic' | 'lambert' | 'standard'	'basic'
layers*	Abstract[]	[]

The lighting prop controls the shading that is applied on the material. The material then accepts all the material properties supported by ThreeJS of the material type specified by the lighting prop.

* Note: the layers prop is only available on the LayerMaterial class, not the component. Pass in layers as children in React.

Built-in layers

Here are the layers that lamina currently provides

Name	Function
Fragment Layers
Color	Flat color.
Depth	Depth based gradient.
Fresnel	Fresnel shading (strip or rim-lights).
Gradient	Linear gradient.
Matcap	Load in a Matcap.
Noise	White, perlin or simplex noise .
Normal	Visualize vertex normals.
Texture	Image texture.
Vertex Layers
Displace	Displace vertices using. noise

See the section for each layer for the options on it.

Debugger

Lamina comes with a handy debugger that lets you tweek parameters till you're satisfied with the result! Then, just copy the JSX and paste!

Replace LayerMaterial with DebugLayerMaterial to enable it.

<DebugLayerMaterial color="#ffffff">
  <Depth
    colorA="#810000" //
    colorB="#ffd0d0"
    alpha={0.5}
    mode="multiply"
    near={0}
    far={2}
    origin={[1, 1, 1]}
  />
</DebugLayerMaterial>

Any custom layers are automatically compatible with the debugger. However, for advanced inputs, see the Advanced Usage section.

Writing your own layers

You can write your own layers by extending the Abstract class. The concept is simple:

Each layer can be treated as an isolated shader program that produces a vec4 color.

The color of each layer will be blended together using the specified blend mode. A list of all available blend modes can be found here

import { Abstract } from 'lamina/vanilla'

// Extend the Abstract layer
class CustomLayer extends Abstract {
  // Define stuff as static properties!

  // Uniforms: Must begin with prefix "u_".
  // Assign them their default value.
  // Any unifroms here will automatically be set as properties on the class as setters and getters.
  // There setters and getters will update the underlying unifrom.
  static u_color = 'red' // Can be accessed as CustomLayer.color
  static u_alpha = 1 // Can be accessed as CustomLayer.alpha

  // Define your fragment shader just like you already do!
  // Only difference is, you must return the final color of this layer
  static fragmentShader = `   
    uniform vec3 u_color;
    uniform float u_alpha;

    // Varyings must be prefixed by "v_"
    varying vec3 v_Position;

    vec4 main() {
      // Local variables must be prefixed by "f_"
      vec4 f_color = vec4(u_color, u_alpha);
      return f_color;
    }
  `

  // Optionally Define a vertex shader!
  // Same rules as fragment shaders, except no blend modes.
  // Return a non-projected vec3 position.
  static vertexShader = `   
    // Varyings must be prefixed by "v_"
    varying vec3 v_Position;

    void main() {
      v_Position = position;
      return position * 2.;
    }
  `

  constructor(props) {
    // You MUST call `super` with the current constructor as the first argument.
    // Second argument is optional and provides non-uniform parameters like blend mode, name and visibility.
    super(CustomLayer, {
      name: 'CustomLayer',
      ...props,
    })
  }
}

👉 Note: The vertex shader must return a vec3. You do not need to set gl_Position or transform the model view. lamina will handle this automatically down the chain.

👉 Note: You can use lamina's noise functions inside of your own layer without any additional imports: lamina_noise_perlin(), lamina_noise_simplex(), lamina_noise_worley(), lamina_noise_white(), lamina_noise_swirl().

If you need a specialized or advance use-case, see the Advanced Usage section

Using your own layers

Custom layers are Vanilla compatible by default.

To use them with React-three-fiber, you must use the extend function to add the layer to your component library!

import { extend } from "@react-three/fiber"

extend({ CustomLayer })

// ...
const ref = useRef();

// Animate uniforms using a ref.
useFrame(({ clock }) => {
  ref.current.color.setRGB(
    Math.sin(clock.elapsedTime),
    Math.cos(clock.elapsedTime),
    Math.sin(clock.elapsedTime),
  )
})

<LayerMaterial>
  <customLayer
    ref={ref}     // Imperative instance of CustomLayer. Can be used to animate unifroms
    color="green" // Uniforms can be set directly
    alpha={0.5}
  />
</LayerMaterial>

Advanced Usage

For more advanced custom layers, lamina provides the onParse event.

This event runs after the layer's shader and uniforms are parsed.

This means you can use it to inject functionality that isn't by the basic layer extension syntax.

Here is a common use case - Adding non-uniform options to layers that directly sub out shader code.

class CustomLayer extends Abstract {
  static u_color = 'red'
  static u_alpha = 1

  static vertexShader = `...`
  static fragmentShader = `
    // ...
    float f_dist = lamina_mapping_template; // Temp value, will be used to inject code later on.
    // ...
  `

  // Get some shader code based off mapping parameter
  static getMapping(mapping) {
    switch (mapping) {
      default:
      case 'uv':
        return `some_shader_code`

      case 'world':
        return `some_other_shader_code`
    }
  }

  // Set non-uniform defaults.
  mapping: 'uv' | 'world' = 'uv'

  // Non unifrom params must be passed to the constructor
  constructor(props) {
    super(
      CustomLayer,
      {
        name: 'CustomLayer',
        ...props,
      },
      // This is onParse callback
      (self: CustomLayer) => {
        // Add to Leva (debugger) schema.
        // This will create a dropdown select component on the debugger.
        self.schema.push({
          value: self.mapping,
          label: 'mapping',
          options: ['uv', 'world'],
        })

        // Get shader chunk based off selected mapping value
        const mapping = CustomLayer.getMapping(self.mapping)

        // Inject shader chunk in current layer's shader code
        self.fragmentShader = self.fragmentShader.replace('lamina_mapping_template', mapping)
      }
    )
  }
}

In react...

// ...
<LayerMaterial>
  <customLayer
    ref={ref}
    color="green"
    alpha={0.5}
    args={[mapping]} // Non unifrom params must be passed to the constructor using `args`
  />
</LayerMaterial>

Layers

Every layer has these props in common.

Prop	Type	Default
mode	BlendMode	"normal"
name	string	<this.constructor.name>
visible	boolean	true

All props are optional.

Color

Flat color.

Prop	Type	Default
color	THREE.ColorRepresentation | THREE.Color	"red"
alpha	number	1

Normal

Visualize vertex normals

Prop	Type	Default
direction	THREE.Vector3 | [number,number,number]	[0, 0, 0]
alpha	number	1

Depth

Depth based gradient. Colors are lerp-ed based on mapping props which may have the following values:

• vector: distance from origin to fragment's world position.
• camera: distance from camera to fragment's world position.
• world: distance from fragment to center (0, 0, 0).

Prop	Type	Default
colorA	THREE.ColorRepresentation | THREE.Color	"white"
colorB	THREE.ColorRepresentation | THREE.Color	"black"
alpha	number	1
near	number	2
far	number	10
origin	THREE.Vector3 | [number,number,number]	[0, 0, 0]
mapping	"vector" | "camera" | "world"	"vector"

Fresnel

Fresnel shading.

Prop	Type	Default
color	THREE.ColorRepresentation | THREE.Color	"white"
alpha	number	1
power	number	0
intensity	number	1
bias	number	2

Gradient

Linear gradient based off distance from start to end in a specified axes. start and end are points on the axes selected. The distance between start and end is used to lerp the colors.

Prop	Type	Default
colorA	THREE.ColorRepresentation | THREE.Color	"white"
colorB	THREE.ColorRepresentation | THREE.Color	"black"
alpha	number	1
contrast	number	1
start	number	1
end	number	-1
axes	"x" | "y" | "z"	"x"
mapping	"local" | "world" | "uv"	"local"

Noise

Various noise functions.

Prop	Type	Default
colorA	THREE.ColorRepresentation | THREE.Color	"white"
colorB	THREE.ColorRepresentation | THREE.Color	"black"
colorC	THREE.ColorRepresentation | THREE.Color	"white"
colorD	THREE.ColorRepresentation | THREE.Color	"black"
alpha	number	1
scale	number	1
offset	THREE.Vector3 | [number, number, number]	[0, 0, 0]
mapping	"local" | "world" | "uv"	"local"
type	"perlin' | "simplex" | "cell" | "curl"	"perlin"

Matcap

Set a Matcap texture.

Prop	Type	Default
map	THREE.Texture	undefined
alpha	number	1

Texture

Set a texture.

Prop	Type	Default
map	THREE.Texture	undefined
alpha	number	1

BlendMode

Blend modes currently available in lamina

normal	divide
add	overlay
subtract	screen
multiply	softlight
lighten	reflect
darken	negation

Vertex layers

Layers that affect the vertex shader

Displace

Displace vertices with various noise.

Prop	Type	Default
strength	number	1
scale	number	1
mapping	"local" | "world" | "uv"	"local"
type	"perlin' | "simplex" | "cell" | "curl"	"perlin"
offset	THREE.Vector3 | [number,number,number]	[0, 0, 0]