Colours

A simple shader that changes the colour of the entity based on the time. The shader is based on the default shader from shadertoy.

Example Links

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Calculating a time varying pixel color

This example demonstrates how to calculate a time varying pixel color by using a cosine wave made up of the current time and the UV coordinates.

  import ultraviolet.syntax.*

  inline def fragment: Shader[FragmentEnv, Unit] =
    Shader[FragmentEnv] { env =>

      def fragment(color: vec4): vec4 =

        val col: vec3 = 0.5f + 0.5f * cos(env.TIME + env.UV.xyx + vec3(0.0f, 2.0f, 4.0f))
        vec4(col, 1.0f)

    }