util.go

package main

import (
	"github.com/hajimehoshi/ebiten/v2"
	"github.com/hajimehoshi/ebiten/v2/text"
	"golang.org/x/image/font"
	"golang.org/x/image/font/basicfont"
	"image/color"
	"math"
)

var standardFont = basicfont.Face7x13

func rainbowColor(frameCount int) color.Color {
	r := math.Sin(float64(frameCount)*0.01+0)*127 + 128
	g := math.Sin(float64(frameCount)*0.01+2*math.Pi/3)*127 + 128
	b := math.Sin(float64(frameCount)*0.01+4*math.Pi/3)*127 + 128
	return color.RGBA{uint8(r), uint8(g), uint8(b), 255}
}

func createTextImage(textStr string, clr color.Color, fnt font.Face) *ebiten.Image {
	// Measure the size of the text
	bound, _ := font.BoundString(fnt, textStr)
	w, h := (bound.Max.X - bound.Min.X).Ceil(), (bound.Max.Y - bound.Min.Y).Ceil()

	// Create a new image with the measured size
	img := ebiten.NewImage(w, h)

	// Draw the text onto the image
	text.Draw(img, textStr, fnt, 0, h-int(fnt.Metrics().Descent.Ceil()), clr)

	return img
}

func drawSquare(screen *ebiten.Image, p Point, clr color.Color) {
	rect := ebiten.NewImage(gridSize-1, gridSize-1)
	rect.Fill(clr)
	opts := &ebiten.DrawImageOptions{}
	opts.GeoM.Translate(float64(p.X*gridSize), float64(p.Y*gridSize))
	screen.DrawImage(rect, opts)
}