Last active
August 29, 2015 14:01
-
-
Save Uradamus/e5434b1ea859559a1097 to your computer and use it in GitHub Desktop.
Lua script that takes a file of elevation values and uses them to recreate an InWorldz / Second Life style ground mesh as an OBJ file.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
--[[ | |
Call this file with the height input file and the desired output file as arguments. | |
example: lua ground_obj.lua height.txt ground.obj | |
]]-- | |
-- Read the input height values. | |
input = io.open(arg[1], "r") | |
heights = {} | |
for line in input:lines() do | |
table.insert(heights, tonumber(line)) | |
end | |
io.close(input) | |
-- Write the output obj file. | |
output = io.open(arg[2], "w") | |
for x = 0, 256, 1 do | |
for y = 0, 256, 1 do | |
output:write("v ", x, " ", y, " ", heights[x*256+y+1], "\n") | |
end | |
end | |
for i = 0, 256, 1 do | |
for j = 1, 256, 1 do | |
output:write("f ", (i*257)+j, " ", (i*257)+j+1, " ", (257*(i+1))+j+1, " ", (257*(i+1))+j, "\n") | |
end | |
end | |
io.close(output) |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
-- This generates a file full of random height values that can be used to test the above script. | |
output = io.open("height.txt", "w") | |
for i = 1, 66049, 1 do | |
output:write(math.random(3), "\n") | |
end | |
io.close(output) |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment