Gists/init.lua

print("forumbug loading")

    local groups = {choppy=2, dig_immediate=3, picture=1}

    -- Texture for the frame
    local frame_texture = "metal_1.png"
    -- Pixel size of the resulting texture for the node. Higher resolutions for more details.
    local resulttexture_pix = 800
    -- Frame border width in percent
    local frame_widthpercent = 2.5
    -- Scaling of the picture
    local pic_scale = 2.5

    -- Get the width and height of the picture from the file in pixel
    local pic_pixwidth,pic_pixheight=32,24
    -- Get the max side lenght of the picture in pixel
    local pic_pixmax = math.max(pic_pixwidth,pic_pixheight)
    -- Frame border width in pixel
    local frame_widthpixel = math.ceil(frame_widthpercent * pic_pixmax / 100.0)

    -- Distance beetween the frame and the picture in pixel
    local border_pix = 4
    -- Pixel size of the combined square texture of the picture with frame and border
    local pictexture_pix = pic_pixmax + (frame_widthpixel * 2) + (border_pix * 2)
    -- X and Y position oft the picture in the combined square texture of the picture with frame and border
    local pic_xoffset = ((pic_pixmax - pic_pixwidth) / 2) + frame_widthpixel + border_pix
    local pic_yoffset = ((pic_pixmax - pic_pixheight) / 2) + frame_widthpixel + border_pix

    -- Frame border width of the node
    local frame_widthnode = 1.0 / pictexture_pix * frame_widthpixel
    -- Frame border thickness of the node
    local frame_thickness = 0.1

    -- Picture width of the node (whole picture including frame)
    local pic_width = 1.0
    -- Picture height of the node (whole picture including frame)
    local pic_height = 1.0
    -- Picture thickness of the node
    local pic_thickness = 0.05

    if pic_pixwidth > pic_pixheight then
        -- Landscape picture. Set the Picture height of the node (whole picture including frame) accordingly to the original picture aspect ratio
        pic_height = (pic_width / pictexture_pix) * (pic_pixheight + 2 * (frame_widthpixel + border_pix))
    else
        -- Potrait picture Set the Picture width of the node (whole picture including frame) accordingly to the original picture aspect ratio
        pic_width = (pic_height / pictexture_pix) * (pic_pixwidth + 2 * (frame_widthpixel + border_pix))
    end

    -- node
    minetest.register_node(":bughunt:bug", {
        description = "Picture #1",
        drawtype = "nodebox",
         -- Tile definition in the follwing order: +Y, -Y, +X, -X, +Z, -Z.
        tiles = {
            {name="("..frame_texture.."^[resize:"..resulttexture_pix.."x"..resulttexture_pix..")^([combine:"..pictexture_pix.."x"..pictexture_pix..":"..pic_xoffset..","..pic_yoffset.."=picture_1.png^[resize:"..resulttexture_pix.."x"..resulttexture_pix..")"},
            {name=frame_texture}
        },
        visual_scale = pic_scale,
        inventory_image = "gallery_inventory.png",
        wield_image = "gallery_inventory.png",
        paramtype = "light",
        paramtype2 = "wallmounted",
        sunlight_propagates = true,
        walkable = false,
        node_box = {
            type = "fixed",
            -- Box definition in following order: {x1, y1, z1, x2, y2, z2}
            fixed = {
                -- Picture
                {-pic_width/2.0, -0.5/pic_scale, -pic_height/2.0, pic_width/2.0, -(0.5 - pic_thickness) / pic_scale, pic_height/2.0},                   
                -- Left frame border
                {-pic_width/2.0, -0.5/pic_scale, -pic_height/2.0, -pic_width/2.0+frame_widthnode, -(0.5 - frame_thickness) / pic_scale, pic_height/2.0},
                -- Right frame border
                {pic_width/2.0-frame_widthnode, -0.5/pic_scale, -pic_height/2.0, pic_width/2.0, -(0.5 - frame_thickness) / pic_scale, pic_height/2.0},
                 -- Bottom frame border
                {-pic_width/2.0, -0.5/pic_scale, -pic_height/2.0, pic_width/2.0, -(0.5 - frame_thickness) / pic_scale, -pic_height/2.0+frame_widthnode},
                -- Top frame border
                {-pic_width/2.0, -0.5/pic_scale, pic_height/2.0-frame_widthnode, pic_width/2.0, -(0.5 - frame_thickness) / pic_scale, pic_height/2.0},
            },
        },
        groups = groups,
    })