Love2d raycasting test

main.lua

-- 1. make zip and rename it to .love
-- 2. copy /b love.exe+mygame.love mygame.exe
-- or cmd /c copy /b love.exe+mygame.love mygame.exe

-- D:\repos\love-11.4-win64/lovec.exe .
function love.load()
    TileSize = 32
    GridLength = 16

    Player = {
        x = 8,
        y = 8
    }

    Map = {
        { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },
        { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },
        { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },
        { 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, },
        { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },
        { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },
        { 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },
        { 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },
        { 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },
        { 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, },
        { 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, },
        { 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, },
        { 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },
        { 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, },
        { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },
        { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, }
    }

    Rays = {}
end

function love.keypressed(key)
    if key == "up" then
        Player.y = Player.y - 1
    end
    if key == "down" then
        Player.y = Player.y + 1
    end
    if key == "left" then
        Player.x = Player.x - 1
    end
    if key == "right" then
        Player.x = Player.x + 1
    end

    Rays = RayCast(Map, TileSize, Player.x, Player.y)
end

GetCellByPixelCoordinates = function(px, py, grid, tileSize)
    local x = math.floor(px / tileSize)
    local y = math.floor(py / tileSize)
    if x > 0 and x <= #grid and y > 0 and y <= #grid then
        return grid[x][y]
    else
        return nil
    end
end

PixelOutOfBounds = function(px, py)
    if px < 0 or px > love.graphics.getWidth() or
        py < 0 or py > love.graphics.getHeight() then
        return true
    end
    return false
end

DegreesToRadians = function(degrees)
    return degrees * math.pi / 180
end

RadiansToDegrees = function(radians)
    return radians * 180 / math.pi
end

RayCast = function(grid, tileSize, cellX, cellY)
    local points = {}
    for angle = 0, 360, 1 do
        local radius = tileSize
        local targetX = cellX * tileSize
        local targetY = cellY * tileSize

        for i = 1, love.graphics.getWidth(), 1 do
            if not PixelOutOfBounds(targetX, targetY) and
                GetCellByPixelCoordinates(targetX, targetY, grid, tileSize) == 0 then
                radius = radius + 1
                targetX = Player.x * tileSize + math.cos(DegreesToRadians(angle)) * radius
                targetY = Player.y * tileSize + math.sin(DegreesToRadians(angle)) * radius
            end
        end
        table.insert(points, { x = targetX, y = targetY })
    end
    return points
end

function love.update(dt)
    love.timer.sleep(1 / 10 - dt)
end

function love.draw(dt)
    -- draw tiles
    for x = 1, #Map, 1 do
        for y = 1, #Map, 1 do
            if Map[x][y] == 0 then
                love.graphics.setColor(0.5, 0.5, 0.5, 1)
                love.graphics.rectangle("line",
                    x * TileSize,
                    y * TileSize,
                    TileSize,
                    TileSize)
            else
                love.graphics.setColor(0.75, 0.75, 0.75, 1)
                love.graphics.rectangle("fill",
                    x * TileSize,
                    y * TileSize,
                    TileSize,
                    TileSize)
            end
        end
    end


    if Rays then
        print(#Rays)
        for i = 1, #Rays, 1 do
            love.graphics.setColor(0, 0, 1, 1)
            love.graphics.line(
                Player.x * TileSize,
                Player.y * TileSize,
                Rays[i].x,
                Rays[i].y)

            love.graphics.setColor(1, 0, 0, 1)
            love.graphics.circle("line",
                Rays[i].x, Rays[i].y,
                4)
        end
    end
    -- player
    love.graphics.setColor(0, 1, 0, 1)
    love.graphics.rectangle("fill",
        Player.x * TileSize, Player.y * TileSize,
        16,
        16)
end