Fullscreen quad on threejs

fullscreen-quad-threejs.js

this.geometry = new BufferGeometry()
const vertices = new Float32Array([
  -1.0, -1.0,
  3.0, -1.0,
  -1.0, 3.0,
])

const uvs = new Float32Array([0, 0, 2, 0, 0, 2])

this.geometry.setAttribute('uv', new BufferAttribute(uvs, 2))
this.geometry.setAttribute('position', new BufferAttribute(vertices, 2))

this.material = new ShaderMaterial({
  vertexShader,
  fragmentShader,
  uniforms: {
    ....
  },
})

// VERTEX
void main() {
  gl_Position = vec4(position.xy, 1.0, 1.0);
}