snake/render.go

package main

import (
	"strconv"

	"github.com/gdamore/tcell/v2"
)

// drawScore Print the score
func drawScore(screen tcell.Screen, style tcell.Style, score *Score) {
	var x, y int = 5, 24
	for _, r := range []rune("[ Score: " + strconv.FormatInt(int64(score.score), 10) + " ]") {
		screen.SetContent(x, y-1, r, nil, style)
		x++
	}
}

// drawCoords Print the coordinates of the head of the snake
func drawCoords(screen tcell.Screen, style tcell.Style, snake *Snake) {
	var x, y int = 25, 24
	for _, r := range []rune("[ x:" + strconv.FormatInt(int64(*&snake.head.x), 10) + " y: " + strconv.FormatInt(int64(*&snake.head.y), 10) + " ]") {
		screen.SetContent(x, y-1, r, nil, style)
		x++
	}
}

// drawBox Draw the outline of the box the snake can move in
func drawBox(s tcell.Screen, style tcell.Style, x1, y1, x2, y2 int) {
	if y2 < y1 {
		y1, y2 = y2, y1
	}
	if x2 < x1 {
		x1, x2 = x2, x1
	}

	// Fill background
	for row := y1; row <= y2; row++ {
		for col := x1; col <= x2; col++ {
			s.SetContent(col, row, ' ', nil, style)
		}
	}

	// Draw borders
	for col := x1; col <= x2; col++ {
		s.SetContent(col, y1, '═', nil, style)
		s.SetContent(col, y2, '═', nil, style)
	}
	for row := y1 + 1; row < y2; row++ {
		s.SetContent(x1, row, '║', nil, style)
		s.SetContent(x2, row, '║', nil, style)
	}

	// Only draw corners if necessary
	if y1 != y2 && x1 != x2 {
		s.SetContent(x1, y1, '╔', nil, style)
		s.SetContent(x2, y1, '╗', nil, style)
		s.SetContent(x1, y2, '╚', nil, style)
		s.SetContent(x2, y2, '╝', nil, style)
	}

}