tour_golang_62.go

package main

import (
    "code.google.com/p/go-tour/pic"
    "image"
    "image/color"
    "math"
)

type Image struct {
    Width int
    Height int
}

func (i Image) ColorModel() color.Model {
    return color.RGBAModel
}

func (i Image) Bounds() image.Rectangle {
    return image.Rect(0,0, i.Width, i.Height)   
}

func (i Image) At(x, y int) color.Color {
    v := math.Sqrt(float64(x*x*x + y*y*y))
    return color.RGBA{uint8(v), uint8(v), 0, 255} 
}

func main() {
    m := Image{255, 255}
    pic.ShowImage(m)
}