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Jean-Patrick Guerrero
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199
init.lua
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199
init.lua
Normal file
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local floor, abs, sqrt = math.floor, math.abs, math.sqrt
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local cos, sin = math.cos, math.sin
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local concat = table.concat
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local map = {
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{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},
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{1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1},
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{1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1},
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{1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1},
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{1,0,0,0,0,0,2,2,2,2,2,0,0,0,0,3,0,3,0,3,0,0,0,1},
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{1,0,0,0,0,0,2,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,1},
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{1,0,0,0,0,0,2,0,0,0,2,0,0,0,0,3,0,0,0,3,0,0,0,1},
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{1,0,0,0,0,0,2,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,1},
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{1,0,0,0,0,0,2,2,0,2,2,0,0,0,0,3,0,3,0,3,0,0,0,1},
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{1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1},
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{1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1},
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{1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1},
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{1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1},
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{1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1},
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{1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1},
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{1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1},
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{1,4,4,4,4,4,4,4,4,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1},
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{1,4,0,4,0,0,0,0,4,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1},
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{1,4,0,0,0,0,5,0,4,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1},
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{1,4,0,4,0,0,0,0,4,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1},
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{1,4,0,4,4,4,4,4,4,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1},
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{1,4,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1},
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{1,4,4,4,4,4,4,4,4,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1},
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{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}
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}
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local posX, posY = 22, 12
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local dirX, dirY = -1, 0
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local planeX, planeY = 0, 0.66
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local w, h = 800, 600
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local moveSpeed, rotSpeed = 2, 0.5
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local function draw()
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local screen, i = {}, 0
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for x = 0, w do
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local camX = 2 * (x / w) - 1
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local rayPosX, rayPosY = posX, posY
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local rayDirX = dirX + planeX * camX
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local rayDirY = dirY + planeY * camX
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local mapX = floor(rayPosX)
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local mapY = floor(rayPosY)
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local sideDistX, sideDistY
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local deltaDistX = sqrt(1 + (rayDirY ^ 2) / (rayDirX ^ 2))
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local deltaDistY = sqrt(1 + (rayDirX ^ 2) / (rayDirY ^ 2))
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local perpWallDist, stepX, stepY
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local hit, side = 0
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if rayDirX < 0 then
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stepX = -1
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sideDistX = (rayPosX - mapX) * deltaDistX
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else
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stepX = 1
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sideDistX = (mapX + 1 - rayPosX) * deltaDistX
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end
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if rayDirY < 0 then
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stepY = -1
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sideDistY = (rayPosY - mapY) * deltaDistY
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else
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stepY = 1
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sideDistY = (rayPosY + 1 - rayPosY) * deltaDistY
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end
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while hit == 0 do
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if sideDistX < sideDistY then
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sideDistX = sideDistX + deltaDistX
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mapX = mapX+stepX
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side = 0
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else
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sideDistY = sideDistY + deltaDistY
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mapY = mapY + stepY
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side = 1
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end
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if map[mapX][mapY] > 0 then
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hit = 1
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end
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end
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if side == 0 then
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perpWallDist = abs((mapX - rayPosX + (1 - stepX) / 2) / rayDirX)
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else
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perpWallDist = abs((mapY - rayPosY + (1 - stepY) / 2) / rayDirY)
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end
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local lineHeight = abs(floor(h / perpWallDist))
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local drawStart = -lineHeight / 2 + h / 2
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if drawStart < 0 then
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drawStart = 0
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end
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local drawEnd = lineHeight / 2 + h / 2
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if drawEnd >= h then
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drawEnd = h - 1
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end
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local color = {255, 255, 0}
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local square = map[mapX][mapY]
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if square == 1 then
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color = {255, 0, 0}
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elseif square == 2 then
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color = {0, 255, 0}
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elseif square == 3 then
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color = {0, 0, 255}
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elseif square == 4 then
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color = {255, 255, 255}
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end
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if side == 1 then
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for j = 1, #color do
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color[j] = color[j] * 0.5
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end
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end
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color = minetest.rgba(color[1], color[2], color[3], 0xFF)
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for Y = drawStart, drawEnd do
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i = i + 1
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screen[i] = "box[" .. (x / 100) .. "," .. (Y / 100) ..
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";0.04,0.04;" .. color .. "]"
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end
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end
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return concat(screen)
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end
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local fs = [[
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size[8.5,6]
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no_prepend[]
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button[2,5;1,1;up;^]
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button[3,5;1,1;down;v]
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button[4,5;1,1;left;<]
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button[5,5;1,1;right;>]
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]]
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minetest.register_node("raycast:r", {
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drawtype = "normal",
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description = "raycast",
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paramtype = "light",
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groups = {cracky = 3},
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on_construct = function(pos)
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local meta = minetest.get_meta(pos)
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meta:set_string("formspec", fs .. draw())
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end,
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on_receive_fields = function(pos, _, fields)
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if fields.up then
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if map[floor(posX + dirX * moveSpeed)][floor(posY)] == 0 then
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posX = posX + dirX * moveSpeed
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end
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if map[floor(posX)][floor(posY + dirY * moveSpeed)] == 0 then
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posY = posY + dirY * moveSpeed
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end
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end
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if fields.down then
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if map[floor(posX - dirX * moveSpeed)][floor(posY)] == 0 then
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posX = posX - dirX * moveSpeed
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end
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if map[floor(posX)][floor(posY - dirY * moveSpeed)] == 0 then
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posY = posY - dirY * moveSpeed
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end
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end
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if fields.left then
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local oldDirX = dirX
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dirX = dirX * cos(rotSpeed) - dirY * sin(rotSpeed)
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dirY = oldDirX * sin(rotSpeed) + dirY * cos(rotSpeed)
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local oldPlaneX = planeX
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planeX = planeX * cos(rotSpeed) - planeY * sin(rotSpeed)
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planeY = oldPlaneX * sin(rotSpeed) + planeY * cos(rotSpeed)
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end
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if fields.right then
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local oldDirX = dirX
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dirX = dirX * cos(-rotSpeed) - dirY * sin(-rotSpeed)
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dirY = oldDirX * sin(-rotSpeed) + dirY * cos(-rotSpeed)
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local oldPlaneX = planeX
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planeX = planeX * cos(-rotSpeed) - planeY * sin(-rotSpeed)
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planeY = oldPlaneX * sin(-rotSpeed) + planeY * cos(-rotSpeed)
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end
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local meta = minetest.get_meta(pos)
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meta:set_string("formspec", fs .. draw())
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end,
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})
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