sprite.go

package main

import (
	"image/color"
	"math/rand"
)

type Sprite struct {
	clr    color.Color
	x, y   float32
	radius uint
}

//nolint:exhaustruct
func NewSprite() *Sprite {
	spr := &Sprite{}
	spr.setRandomColor()
	spr.setRandomRadius()
	spr.setRandomInitialPosition()
	return spr
}

func (spr *Sprite) setRandomColor() {
	// so that the color is not too dark
	const min = 30
	const max = 256
	r := uint8(rand.Intn(max-min) + min)
	g := uint8(rand.Intn(max-min) + min)
	b := uint8(rand.Intn(max-min) + min)
	spr.clr = color.RGBA{r, g, b, 255}
}

func (spr *Sprite) setRandomRadius() {
	const min = 10
	const max = 30
	spr.radius = uint(rand.Intn(max-min) + min)
}

func (spr *Sprite) setRandomInitialPosition() {
	min := int(spr.radius)

	maxX := int(initialScreenWidth - spr.radius)
	spr.x = float32(rand.Intn(maxX-min) + min)

	maxY := int(initialScreenHeight - spr.radius)
	spr.y = float32(rand.Intn(maxY-min) + min)
}

func (spr *Sprite) getPosition() (x, y float32) {
	return spr.x, spr.y
}