pic.go

// generates an image in grayscale

package main

import "golang.org/x/tour/pic"

// my solution
func Pic(dx, dy int) [][]uint8 {
	p := make([][]uint8, dy)
	for i := range p {
		p[i] = make([]uint8, dx) 
		//p[i][int(i/2)] = 0xFF  // this one draws a line
	}
	
	for x := range p {
		for y := range p[x] {
			//p[x][y] = uint8((x+y)/2*(x^y))  // combining two filters?
			//p[x][y] = uint8(x*y)
			p[x][y] = uint8(-x^y)  // this is my favourite
			//p[x][y] = uint8((x+y)/2)
		}
	}

	
	return p
}

func main() {
	pic.Show(Pic)
}