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TD4.html
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<HTML>
<HEAD><TITLE>TD4 file format</TITLE></HEAD>
<BODY BGCOLOR="#ffffff" BACKGROUND="bkground.jpg">
<P>
<P>
<H1 ALIGN="Center">TD4 File Format</H1>
<H5><A HREF="index.html">Back to RCT home</A></H5>
<P>
The TD4 file stores track design information. The file is in compressed format
from a <A HREF="RLE.html">Run-Length-Encoding</A> algorithm. The last four
bytes are a <A HREF="checksum.html">checksum</A>. The term "RCT" is used
to refer to the original version of "Roller Coaster Tycoon" while the term
"AA/CF" is used to refer to the expansion pack titled "Added Attractions"
in most countries and "Corkscrew Follies" in the United States. Items listed
as ? have values in some files but I have not determined their meaning.
The color assignments are listed below. For original RCT, the decoded
file length is 8058 (decimal) bytes. For "AA/CF" and "Loopy Landscapes",
the decoded file length is 8198 (decimal) bytes.<BR>
The decoded format is as follows:
<P>
00 <A HREF="rideCodes.html">Ride type</A><BR>
01 <A HREF="vehicleCodes.html">Vehicle type</A> (note: for mazes, the vehicle
type will be "00")<BR>
The next four bytes flag "special" track pieces. These pieces are not always
available to the user as they may not have been researched. These items
correspond to the <A HREF="menuTables.html#Ridefeatures">Ride
Features</A> table used within the game.<BR>
02 : bit 7 = vertical loop<BR>
03 : no bits are "researchable"<BR>
04 : bit 1=inline twist, bit 2=half loop, bit 3=corkscrew <BR>
05 : bit 3=water splash, bit 5=barrel roll, bit 6=launched lift hill, bit
7=large loop <BR>
06 <A HREF="operatingModes.html">Operating mode</A><BR>
07 <A HREF="colorScheme.html">Vehicle color scheme</A> (scheme in bits 1
& 0; bit 2 indicates whether this file is in original RCT or the longer
AA/CF expansion format)<BR>
08 body color #1<BR>
09 trim color #1<BR>
0A body color #2<BR>
0B trim color #2<BR>
...<BR>
1E body color #12<BR>
1F trim color #12<BR>
20 track spine color (RCT only, ignored in AA/CF & LL)<BR>
21 track rail color (RCT only, ignored in AA/CF & LL)<BR>
22 support color (RCT only, ignored in AA/CF & LL)<BR>
23 <A HREF="controlFlags.html">departure control flags</A> <BR>
24 number of trains<BR>
25 number of cars per train<BR>
26 minimum wait time in seconds<BR>
27 maximum wait time in seconds<BR>
28 speed (powered launch/chairlift/whoa belly) [1 bit = 3.616 km/hr = 2.25
mph] -or- number of laps for go-karts -or- maximum number of people (eg.
maze)<BR>
29 maximum speed of ride [1 bit = 3.616 km/hr = 2.25 mph]<BR>
2A average speed of ride [1 bit = 3.616 km/hr = 2.25 mph]<BR>
2B lower byte of ride length [meters]<BR>
2C upper byte of ride length [meters]<BR>
2D positive G-force [1 bit = 0.32g]<BR>
2E negative G-force [1 bit = 0.32g]<BR>
2F lateral G-force [1 bit = 0.32g]<BR>
30 number of inversions [lower 5 bits] - or- number of mini golf holes<BR>
31 number of drops [lower 6 bits]<BR>
32 highest drop [1 bit = 1/3 meter ~ 1 foot]<BR>
33 excitement [divide this by 10]<BR>
34 intensity [divide this by 10]<BR>
35 nausea [divide this by 10]<BR>
36 , 37? (this appears to be a two byte value related to the weight
of a coaster vehicle) <BR>
eg: monorail
<P>
8 cars: 46 <BR>
7 cars: 44 <BR>
6 cars: 42 <BR>
5 cars: 40<BR>
4 cars: 3E <BR>
3 cars: 3C <BR>
2 cars: 3A <BR>
1 car: 38
<P>
<P>
<HR>
<P>
38 beginning of track data in original RCT format.
<P>
The following applies to files saved from the AA/CF or LL expansion pack:
<P>
38 spine color 0<BR>
39 spine color 1<BR>
3A spine color 2<BR>
3B spine color 3<BR>
3C rail color 0<BR>
3D rail color 1<BR>
3E rail color 2<BR>
3F rail color 3<BR>
40 support color 0 [wall type for mazes: 0=brick, 1=hedge, 2=ice, 3=wooden]<BR>
41 support color 1<BR>
42 support color 2<BR>
43 support color 3<BR>
44 : ?: 02 = reverser track present in log flume
<P>
45 to C3 are <I>reserved</I><BR>
<P>
<HR>
<P>
C4 beginning of track data in AA/CF format.
<P>
<P>
<HR>
<H2 ALIGN="Center">
TRACK DATA
</H2>
<P>
There are two formats that I know of: one for <A HREF="mazes.html">mazes</A>
and one for everything else (coasters, trains, cars etc.) The "coaster" format
is as follows:
<P>
Each track element has two bytes. The first byte indicates the type of
<A HREF="trackElements.html">track segment</A> while the second byte is a
<A HREF="trackQualifier.html">qualifier</A>. The track data concludes when
a value of "FF" is encountered for the track segment. The remainder of the
file is filled with 00's.
<P>
<P>
<HR>
<H2 ALIGN="Center">
RIDE COLORS
</H2>
<P>
All numbers are in hex
<TABLE FRAME="BORDER">
<TR>
<TD>Code</TD>
<TD><P ALIGN="Center">
R</TD>
<TD><P ALIGN="Center">
G</TD>
<TD><P ALIGN="Center">
B</TD>
<TD> </TD>
</TR>
<TR>
<TD>00</TD>
<TD>2F</TD>
<TD>40</TD>
<TD>3F</TD>
<TD BGCOLOR="3F403F"></TD>
</TR>
<TR>
<TD>01</TD>
<TD>6F</TD>
<TD>80</TD>
<TD>7F</TD>
<TD BGCOLOR="6F807F"></TD>
</TR>
<TR>
<TD>02</TD>
<TD>B0</TD>
<TD>C0</TD>
<TD>BF</TD>
<TD BGCOLOR="B0C0BF"></TD>
</TR>
<TR>
<TD>03</TD>
<TD>70</TD>
<TD>77</TD>
<TD>AF</TD>
<TD BGCOLOR="7077AF"></TD>
</TR>
<TR>
<TD>04</TD>
<TD>80</TD>
<TD>50</TD>
<TD>B0</TD>
<TD BGCOLOR="8050B0"></TD>
</TR>
<TR>
<TD>05</TD>
<TD>0F</TD>
<TD>40</TD>
<TD>B0</TD>
<TD BGCOLOR="0F40B0"></TD>
</TR>
<TR>
<TD>06</TD>
<TD>3F</TD>
<TD>87</TD>
<TD>DF</TD>
<TD BGCOLOR="3F87DF"></TD>
</TR>
<TR>
<TD>07</TD>
<TD>20</TD>
<TD>90</TD>
<TD>8F</TD>
<TD BGCOLOR="20908F"></TD>
</TR>
<TR>
<TD>08</TD>
<TD>1F</TD>
<TD>78</TD>
<TD>00</TD>
<TD BGCOLOR="1F7800"></TD>
</TR>
<TR>
<TD>09</TD>
<TD>4F</TD>
<TD>87</TD>
<TD>5F</TD>
<TD BGCOLOR="4F875F"></TD>
</TR>
<TR>
<TD>0A</TD>
<TD>5F</TD>
<TD>8F</TD>
<TD>30</TD>
<TD BGCOLOR="5F8F30"></TD>
</TR>
<TR>
<TD>0B</TD>
<TD>40</TD>
<TD>AF</TD>
<TD>20</TD>
<TD BGCOLOR="40AF20"></TD>
</TR>
<TR>
<TD>0C</TD>
<TD>80</TD>
<TD>9F</TD>
<TD>5F</TD>
<TD BGCOLOR="809F5F"></TD>
</TR>
<TR>
<TD>0D</TD>
<TD>80</TD>
<TD>88</TD>
<TD>30</TD>
<TD BGCOLOR="808830"></TD>
</TR>
<TR>
<TD>0E</TD>
<TD>D0</TD>
<TD>A7</TD>
<TD>0F</TD>
<TD BGCOLOR="D0A70F"></TD>
</TR>
<TR>
<TD>0F</TD>
<TD>8F</TD>
<TD>50</TD>
<TD>00</TD>
<TD BGCOLOR="8F5000"></TD>
</TR>
<TR>
<TD>10</TD>
<TD>FF</TD>
<TD>6F</TD>
<TD>10</TD>
<TD BGCOLOR="FF6F10"></TD>
</TR>
<TR>
<TD>11</TD>
<TD>B0</TD>
<TD>47</TD>
<TD>00</TD>
<TD BGCOLOR="B04700"></TD>
</TR>
<TR>
<TD>12</TD>
<TD>AF</TD>
<TD>80</TD>
<TD>3F</TD>
<TD BGCOLOR="AF803F"></TD>
</TR>
<TR>
<TD>13</TD>
<TD>7F</TD>
<TD>57</TD>
<TD>1F</TD>
<TD BGCOLOR="7F571F"></TD>
</TR>
<TR>
<TD>14</TD>
<TD>70</TD>
<TD>67</TD>
<TD>40</TD>
<TD BGCOLOR="706740"></TD>
</TR>
<TR>
<TD>15</TD>
<TD>CF</TD>
<TD>80</TD>
<TD>5F</TD>
<TD BGCOLOR="CF805F"></TD>
</TR>
<TR>
<TD>16</TD>
<TD>9F</TD>
<TD>38</TD>
<TD>30</TD>
<TD BGCOLOR="9F3830"></TD>
</TR>
<TR>
<TD>17</TD>
<TD>8F</TD>
<TD>00</TD>
<TD>00</TD>
<TD BGCOLOR="8F0000"></TD>
</TR>
<TR>
<TD>18</TD>
<TD>07</TD>
<TD>00</TD>
<TD>DF</TD>
<TD BGCOLOR="DF0007"></TD>
</TR>
<TR>
<TD>19</TD>
<TD>D0</TD>
<TD>38</TD>
<TD>8F</TD>
<TD BGCOLOR="D0388F"></TD>
</TR>
<TR>
<TD>1A</TD>
<TD>E0</TD>
<TD>9F</TD>
<TD>9F</TD>
<TD BGCOLOR="E09F9F"></TD>
</TR>
<TR>
<TD>1B</TD>
<TD>8F</TD>
<TD>07</TD>
<TD>40</TD>
<TD BGCOLOR="8F0740"></TD>
</TR>
<TR>
<TD>1C</TD>
<TD>3F</TD>
<TD>40</TD>
<TD>70</TD>
<TD BGCOLOR="3F4070"></TD>
</TR>
<TR>
<TD>1D</TD>
<TD>7F</TD>
<TD>CF</TD>
<TD>CF</TD>
<TD BGCOLOR="7FCFCF"></TD>
</TR>
<TR>
<TD>1E</TD>
<TD>FF</TD>
<TD>E7</TD>
<TD>2F</TD>
<TD BGCOLOR="FFE72F"></TD>
</TR>
<TR>
<TD>1F</TD>
<TD>8F</TD>
<TD>D0</TD>
<TD>EF</TD>
<TD BGCOLOR="8FD0EF"></TD>
</TR>
</TABLE>
<P>
</BODY></HTML>