v/examples/wasm/mandelbrot/mandelbrot.v

fn JS.canvas_x() int
fn JS.canvas_y() int
fn JS.setpixel(x int, y int, c f64)

// `main` must be public!
pub fn main() {
	max_x := JS.canvas_x()
	max_y := JS.canvas_y()

	println('starting main.main!')

	mut y := 0
	for y < max_y {
		y += 1
		mut x := 0
		for x < max_x {
			x += 1

			e := (f64(y) / 50) - 1.5
			f := (f64(x) / 50) - 1.0

			mut a := 0.0
			mut b := 0.0
			mut i := 0.0
			mut j := 0.0
			mut c := 0.0

			for i * i + j * j < 4 && c < 255 {
				i = a * a - b * b + e
				j = 2 * a * b + f
				a = i
				b = j
				c += 1
			}

			JS.setpixel(x, y, c)
		}
	}

	panic('reached the end!')
}