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-- Node texture tests
local S = minetest.get_translator("testnodes")
minetest.register_node("testnodes:6sides", {
description = S("Six Textures Test Node"),
tiles = {
"testnodes_normal1.png",
"testnodes_normal2.png",
"testnodes_normal3.png",
"testnodes_normal4.png",
"testnodes_normal5.png",
"testnodes_normal6.png",
},
groups = { dig_immediate = 2 },
})
minetest.register_node("testnodes:anim", {
description = S("Animated Test Node"),
tiles = {
{ name = "testnodes_anim.png",
animation = {
type = "vertical_frames",
aspect_w = 16,
aspect_h = 16,
length = 4.0,
}, },
},
groups = { dig_immediate = 2 },
})
-- Node texture transparency test
local alphas = { 64, 128, 191 }
for a=1,#alphas do
local alpha = alphas[a]
-- Transparency taken from texture
minetest.register_node("testnodes:alpha_texture_"..alpha, {
description = S("Texture Alpha Test Node (@1)", alpha),
drawtype = "glasslike",
paramtype = "light",
tiles = {
"testnodes_alpha"..alpha..".png",
},
use_texture_alpha = "blend",
groups = { dig_immediate = 3 },
})
-- Transparency set via texture modifier
minetest.register_node("testnodes:alpha_"..alpha, {
description = S("Alpha Test Node (@1)", alpha),
drawtype = "glasslike",
paramtype = "light",
tiles = {
"testnodes_alpha.png^[opacity:" .. alpha,
},
use_texture_alpha = "blend",
groups = { dig_immediate = 3 },
})
end
-- Generate PNG textures
local function mandelbrot(w, h, iterations)
local r = {}
for y=0, h-1 do
for x=0, w-1 do
local re = (x - w/2) * 4/w
local im = (y - h/2) * 4/h
-- zoom in on a nice view
re = re / 128 - 0.23
im = im / 128 - 0.82
local px, py = 0, 0
local i = 0
while px*px + py*py <= 4 and i < iterations do
px, py = px*px - py*py + re, 2 * px * py + im
i = i + 1
end
r[w*y+x+1] = i / iterations
end
end
return r
end
local function gen_checkers(w, h, tile)
local r = {}
for y=0, h-1 do
for x=0, w-1 do
local hori = math.floor(x / tile) % 2 == 0
local vert = math.floor(y / tile) % 2 == 0
r[w*y+x+1] = hori ~= vert and 1 or 0
end
end
return r
end
local fractal = mandelbrot(512, 512, 128)
local frac_emb = mandelbrot(64, 64, 64)
local checker = gen_checkers(512, 512, 32)
local floor = math.floor
local abs = math.abs
local data_emb = {}
local data_mb = {}
local data_ck = {}
for i=1, #frac_emb do
data_emb[i] = {
r = floor(abs(frac_emb[i] * 2 - 1) * 255),
g = floor(abs(1 - frac_emb[i]) * 255),
b = floor(frac_emb[i] * 255),
a = frac_emb[i] < 0.95 and 255 or 0,
}
end
for i=1, #fractal do
data_mb[i] = {
r = floor(fractal[i] * 255),
g = floor(abs(fractal[i] * 2 - 1) * 255),
b = floor(abs(1 - fractal[i]) * 255),
a = 255,
}
data_ck[i] = checker[i] > 0 and "#F80" or "#000"
end
local textures_path = minetest.get_modpath( minetest.get_current_modname() ) .. "/textures/"
minetest.safe_file_write(
textures_path .. "testnodes_generated_mb.png",
minetest.encode_png(512,512,data_mb)
)
minetest.safe_file_write(
textures_path .. "testnodes_generated_ck.png",
minetest.encode_png(512,512,data_ck)
)
minetest.register_node("testnodes:generated_png_mb", {
description = S("Generated Mandelbrot PNG Test Node"),
tiles = { "testnodes_generated_mb.png" },
groups = { dig_immediate = 2 },
})
minetest.register_node("testnodes:generated_png_ck", {
description = S("Generated Checker PNG Test Node"),
tiles = { "testnodes_generated_ck.png" },
groups = { dig_immediate = 2 },
})
local png_emb = "[png:" .. minetest.encode_base64(minetest.encode_png(64,64,data_emb))
minetest.register_node("testnodes:generated_png_emb", {
description = S("Generated In-Band Mandelbrot PNG Test Node"),
tiles = { png_emb },
groups = { dig_immediate = 2 },
})
minetest.register_node("testnodes:generated_png_src_emb", {
description = S("Generated In-Band Source Blit Mandelbrot PNG Test Node"),
tiles = { png_emb .. "^testnodes_damage_neg.png" },
groups = { dig_immediate = 2 },
})
minetest.register_node("testnodes:generated_png_dst_emb", {
description = S("Generated In-Band Dest Blit Mandelbrot PNG Test Node"),
tiles = { "testnodes_generated_ck.png^" .. png_emb },
groups = { dig_immediate = 2 },
})
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