118 lines
2.3 KiB
Go
118 lines
2.3 KiB
Go
package getMaze
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import (
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"errors"
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"fmt"
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"image"
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"image/color"
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"image/png"
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"io"
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"net/http"
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"os"
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)
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/*
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Pixel types:
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-1 - explored
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0 - unexplored
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5 - wall
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9 - end
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*/
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type Point struct {
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X int;
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Y int;
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Value int
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}
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type Maze [][]Point
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func GetMaze(imagepath string) (Maze, error) {
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returnMaze := *new(Maze)
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res, err := http.Get(imagepath)
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if err != nil {
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return returnMaze, err
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}
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data, err := io.ReadAll(res.Body)
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if err != nil {
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return returnMaze, err
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}
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defer res.Body.Close()
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err = os.WriteFile("/tmp/maze.png", data, 0755)
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if err != nil {
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return returnMaze, err
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}
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imagereader, err := os.Open("/tmp/maze.png")
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if err != nil {
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return returnMaze, err
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}
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image, err := png.Decode(imagereader)
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if err != nil {
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return *new(Maze), err
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}
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psize := DeterminePixelSize(image)
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for y := image.Bounds().Min.Y; y < image.Bounds().Max.Y; y += psize {
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newRow := make([]Point, 0)
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for x := image.Bounds().Min.X; x < image.Bounds().Max.X; x += psize {
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fmt.Print(x); fmt.Print(" "); fmt.Println(y)
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typ := 0
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switch image.At(x, y) {
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case color.RGBA{ R: 255, G: 0, B: 0, A: 255 }:
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typ = 0
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case color.RGBA{ R: 0, G: 0, B: 255, A: 255 }:
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typ = 9
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case color.RGBA{ R: 255, G: 255, B: 255, A: 255 }:
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typ = 0
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case color.RGBA{ R: 0, G: 0, B: 0, A: 255 }:
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typ = 5
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default:
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fmt.Println(image.At(x, y))
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return *new(Maze), errors.New("bad color")
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}
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newPoint := Point{
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X: x / psize,
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Y: y / psize,
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Value: typ,
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}
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newRow = append(newRow, newPoint)
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}
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returnMaze = append(returnMaze, newRow)
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}
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return returnMaze, err
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}
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func PrintMaze(maze Maze) {
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for _, v := range maze {
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fmt.Print("[")
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for _, vv := range v {
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fmt.Print(vv.Value)
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fmt.Print(", ")
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}
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fmt.Println("]")
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}
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}
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func DeterminePixelSize(image image.Image) int {
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var x, y int
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color := image.At(x, y)
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for {
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if color != image.At(x, y) {
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break
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}
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x++
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y++
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}
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return x
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}
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