Heart in Go

heart.go

package main

import (
	"golang.org/x/tour/pic"
	"math"
	//"fmt"
)

func CalcHeart(t float64) (x,y float64) {
	x = 16*math.Sin(t)*math.Sin(t)*math.Sin(t)
	y = 13*math.Cos(t) - 5*math.Cos(2*t) - math.Cos(4*t)
	return
}

func Pic(dx, dy int) [][]uint8 {
	image := make([][]uint8, dy)
	for i := 0; i < dy; i++ {
		image[i] = make([]uint8, dx)
	}
	
	for i:=-1000;i<1000;i++{
		x,y := CalcHeart(float64(i))
		//fmt.Println(x," ",y)
		ix := int(x)
		iy := int(y)
		//fmt.Println(ix," ",iy)
		if ix > -128 && ix < 128 {
			if iy > -128 && iy < 128 {
				image[int((y+128))][int((x+128))] = 255
			}
		}
	}

	return image
}

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