More .obj investigating. 0x80 seems to be a special value

scripts/try-uncompress

@@ -138,7 +138,7 @@ module Obj
       sprite_pixels = rel_data[hdr.pixel_range]
 
       records = sprite_pixels.split("\x00")
-      records.map { |record| record += "\x00" }
+      records.map! { |record| record += "\x00" }
 
       new(hdr, records, rel_data)
     end
@@ -216,8 +216,8 @@ def display(data, blocksize=8, skip=0, header: false)
     out = [
       "0x#{hex(i*blocksize, 4)}",
       block.map { |b| hex(b, 2) },                          # hex
-      "    | " + block.map { |b| text(b) }.join("") + " |",   # ascii
-      block.map { |b| ascii(b) } ,# decimal bytes
+ #     "    | " + block.map { |b| text(b) }.join("") + " |",   # ascii
+#      block.map { |b| ascii(b) } ,# decimal bytes
       "",# decimal 2-bytes
      # decimal 4-bytes
     ]
@@ -273,7 +273,6 @@ def decompress(filename)
       break if data.empty?
 
       right = data.index(0)
-      
 
       if right.nil?
         print "error! end of chunk not found"
@@ -360,9 +359,35 @@ def sprites(filename)
   end
 end
 
+def sprite(filename, i)
+  obj = load_obj(filename)
+
+  puts filename + ":"
+  spr = obj.sprites[i]
+  raise "No sprite #{i}" unless spr
+
+  # Show the header
+  display(spr.raw[0...24], 4, header: true)
+
+  spr.records.each_with_index do |record, i|
+    str =
+      if record.size > 40
+        record[0...20].bytes.map { |b| hex(b, 2) }.join(" ") +
+        " ... " +
+        record[-20..-1].bytes.map { |b| hex(b, 2) }.join(" ")
+      else
+        record.bytes.map { |b| hex(b, 2) }.join(" ")
+      end
+
+    puts "%4d: %4d bytes: %s"%[i,record.size, str]
+  end
+end
+
 case command = ARGV.shift
 when "sprites" then
   ARGV.each { |filename| sprites(filename) } 
+when "sprite" then
+  sprite(ARGV[0], ARGV[1].to_i)
 when "dump" then
   ARGV.each { |filename| dump(filename) } 
 when "compare" then