How to create GLSL bindings for Kotlin.

glsl-sample.kt

import java.lang.Math.*

val t: Double = 0.0

data class vec2(var x: Double = 0.0, var y: Double = 0.0)

open class Pixel {
    val uv: vec2 = vec2()
}

data class Circle(var position: vec2, var radius: Double) : Pixel()

operator fun vec2.plusAssign(value: Double) {
    this.x += value.toInt()
    this.y += value.toInt()
}

fun drawCircle(position: vec2 = vec2(), radius: Double, init: Circle.() -> Unit) = Circle(position, radius).init()

fun main() {
    drawCircle(vec2(0.1, 0.1), 0.2) {
        radius -= cos(t * PI)
        position += sin(uv.x * PI)
    }
}