TEXTURES
--------
BASIC TEXTURES, THAT MUST EXIST WITH GIVEN NAMES (INCLUDING DIRECTORIES)
------------------------------------------------------------------------
Following the description as in Code:
Routine "load_basic_textures"
Textures for the particle system:
txTexture[0]: "basicdat/particle.bmp"
Textures for walls and bottom:
txTexture[1]: "[module]/gamedat/tile0.bmp"
txTexture[2]: "[module]/gamedat/tile1.bmp"
txTexture[3]: "[module]/gamedat/tile2.bmp"
txTexture[4]: "[module]/gamedat/tile3.bmp"
Water textures:
txTexture[5]: "[module]/gamedat/watertop.bmp"
txTexture[6]: "[module]/gamedat/waterlow.bmp
Phong map:
txTexture[7]: "[module]/gamedat/phong.bmp"
THE MESH
--------
The mesh is a description of the whole maze. The maximum size is 64 by 64 tiles.
A tile in EGOBOO is called a "FAN".
The type of the file is controlled by the first four bytes.
Must be MAPID 0x4470614d // The string... "MapD"
Limits:
MAXMESHFAN (512*512) // terrain mesh size
MAXMESHSIZEY 1024 // Max fans in y direction
BYTESFOREACHVERTEX 14 // 14 bytes each
MAXMESHVERTICES 16 // Fansquare vertices
MAXMESHTYPE 64 // Number of fansquare command types
MAXMESHCOMMAND 4 // Draw up to 4 fans
MAXMESHCOMMANDENTRIES 32 // Fansquare command list size
MAXMESHCOMMANDSIZE 32 // Max trigs in each command
MAXTILETYPE 256 // Max number of tile images
MAXMESHRENDER 1024 // Max number of tiles to draw
FANOFF 0xffff // Don't draw the fansquare if tile = this
OFFEDGE 0 // Character not on a fan ( maybe )
The mesh is loaded from file "[module]/gamedat/level.mpd" with
the Routine "load_mesh(char *modname)"
Variables used:
unsigned int numfanblock = 0; // Number of collision areas
unsigned short meshbumplistchr[MAXMESHFAN/16]; // For character collisions
unsigned short meshbumplistchrnum[MAXMESHFAN/16]; // Number on the block
unsigned short meshbumplistprt[MAXMESHFAN/16]; // For particle collisions
unsigned short meshbumplistprtnum[MAXMESHFAN/16]; // Number on the block
unsigned char meshexploremode = FALSE; // Explore mode?
int maxtotalmeshvertices = (256*256*6);// Max number of vertices
int meshsizex; // Size in fansquares
int meshsizey; //
float meshedgex; // Limits of mesh !!!BAD!!!
float meshedgey; //
unsigned short meshlasttexture; // Last texture used
unsigned char meshtype[MAXMESHFAN]; // Command type
unsigned char meshfx[MAXMESHFAN]; // Special effects flags
unsigned char meshtwist[MAXMESHFAN]; //
unsigned char meshinrenderlist[MAXMESHFAN]; // Display fan? yes/no
unsigned short meshtile[MAXMESHFAN]; // Get texture from this
unsigned int meshvrtstart[MAXMESHFAN]; // Which vertex to start at
unsigned int meshblockstart[(MAXMESHSIZEY/4)+1];
unsigned int meshfanstart[MAXMESHSIZEY]; // Which fan to start a row with
Format of Mapfile:
Bytes 0 .. 3: Must be MAPID 0x4470614d // The string... "MapD"
Bytes 4 .. 7: numvert: INT Number of Vertices
Bytes 8 .. 11: meshsizex: Mesh size in x-direction
Bytes 12 .. 15: meshsizey: Mesh size in y-direction
// int numfan = meshsizex*meshsizey
First Step:
Numfan times:
Load meshtype data
Read INT into itmp
Split this into this values:
meshtype[fan] = itmp >> 24;
meshfx[fan] = itmp >> 16;
meshtile[fan] = itmp & 0xFFFF;
Second Step:
Load fan data
Numfan times:
Read UNSIGNED CHAR into ctmp
meshtwist[fan] = ctmp
Third Step:
Load vertex x data
Numvert times:
read FLOAT into ftmp
meshvrtx[cnt] = ftmp
Fourth Step:
Load vertex y data
Numvert times:
read FLOAT into ftmp
meshvrty[cnt] = ftmp
Fifth step:
Load vertex z data
Numvert times:
read FLOAT into ftmp
meshvrtz[cnt] = ftmp / 16.0; // Cartman uses 4 bit fixed point for Z
Sixth Step:
Get vertex lighting data.
Numvert times:
If fullbright:
Just set the maximum value
meshvrta[cnt] = 255;
meshvrtl[cnt] = 255;
Otherwise:
Read UNSIGNED CHAR into ctmp
meshvrta[cnt] = ctmp;
meshvrtl[cnt] = 0;
Seventh Step:
After the map is read, there is some more work to do:
make_fanstart();
Build a look up table to ease calculating the
fan number given an x,y pair
For cnt = 0 .. meshsizey:
meshfanstart[cnt] = meshsizex * cnt
For cnt = 0 .. (meshsizey >> 2):
meshblockstart[cnt] = (meshsizex >> 2) * cnt
Calculate the display vertices for the mesh:
for meshsizey
for meshsizex
fan = meshfanstart[y]+x;
meshvrtstart[fan] = vert;
vert+=meshcommandnumvertices[meshtype[fan]];
Additional needed data:
meshedgex = meshsizex*128;
meshedgey = meshsizey*128;
numfanblock = ((meshsizex>>2))*((meshsizey>>2)); // MESHSIZEX MUST BE MULTIPLE OF 4
watershift = 3;
if(meshsizex > 16) watershift = 4;
if(meshsizex > 32) watershift = 5;
if(meshsizex > 64) watershift = 6;
if(meshsizex > 128) watershift = 7;
if(meshsizex > 256) watershift = 8;
RENDERING A FAN
---------------
Fan means a tile in the maze.
Used Data:
DATA FOR MESH FANS
Additional:
meshlasttexture
Vertex is a value from 0-15, for the meshcommandref/u/v variables
Badvertex is a value that references the actual vertex number
RENDER A WATER FAN
------------------
Rendered with "render_water_fan"
Used Data:
waterlayeru[layer];
waterlayerv[layer];
waterlayerframe[layer];
waterlayerzadd[layer];
waterlayerz[layer];
waterlayercolor[layer]
waterlayeralpha[layer]
Setting up the textureoffset for moving textures:
Stored in
textureoffset[cnt];
DATA FOR MESH FANS
------------------
Loaded by "load__mesh_fans"
DATA in "FANS.TXT"
USED VARIABLES
unsigned char meshcommands[MAXMESHTYPE]; // Number of commands
unsigned char meshcommandsize[MAXMESHTYPE][MAXMESHCOMMAND]; // Entries in each command
unsigned short meshcommandvrt[MAXMESHTYPE][MAXMESHCOMMANDENTRIES]; // Fansquare vertex list
unsigned char meshcommandnumvertices[MAXMESHTYPE]; // Number of vertices
float meshcommandu[MAXMESHTYPE][MAXMESHVERTICES]; // Vertex texture position
float meshcommandv[MAXMESHTYPE][MAXMESHVERTICES]; //
float meshtileoffu[MAXTILETYPE]; // Tile texture offset
float meshtileoffv[MAXTILETYPE];
start of bigfantype at (MAXMESHTYPE/2)
As Struct:
struct {
unsigned char count; // Number of commands
unsigned char size[MAXMESHCOMMAND]; // Entries in each command
unsigned short vrt[MAXMESHCOMMANDENTRIES]; // Fansquare vertex list
unsigned char numvertices; // Number of vertices
float u[MAXMESHVERTICES]; // SMALL FANTYPE, BIG FANTYPE
float v[MAXMESHVERTICES]; // Vertex texture position
} meshcommand[MAXMESHTYPE];
struct {
float offu; // Tile texture offset
float offv;
} meshtile[MAXTILETYPE];
// Number of Fan Types: 26
numfantype: 26
Init:
fantype = 0;
bigfantype = MAXMESHTYPE/2
FANTYPE 0 // Two Faced Ground...
// Vertices: 4
numvertices: 4 // numvertices[fantype] / numvertices[bigfantype]
// Ref: 0 U: 0.00 V: 0.00
meshcommandu: 0.00, 1.00, 1.00, 0.00 // meshcommandu[fantype][cnt] = ftmp;
// meshcommandu[bigfantype][cnt] = ftmp
meshcommandv: 0.00, 0.00, 1.00, 1.00 // meshcommandv[fantype][cnt] = ftmp;
// meshcommandv[bigfantype][cnt] = ftmp
// Commands 1:
count: 1
// Command Size: 4
size: 4
vtrt: 1, 2, 3, 0 // meshcommandsize[fantype][command] = commandsize;
// meshcommandsize[bigfantype][command] = commandsize; // Dupe
FANTYPE 1 // Two Faced Ground...
numvertices: 4
meshcommandu: 0.00, 1.00, 1.00, 0.00
meshcommandv: 0.00, 0.00, 1.00, 1.00
count: 1
size: 4
vrt: 0, 1, 2, 3
FANTYPE 2 // Four Faced Ground...
numvertices: 5
meshcommandu: 0.00, 1.00, 1.00, 0.00, 0.50
meshcommandv: 0.00, 0.00, 1.00, 1.00, 0.50
count: 1
size: 6
vrt: 4, 3, 0, 1, 2, 3
FANTYPE 3 // Eight Faced Ground...
numvertices: 9
meshcommandu: 0.00, 1.00, 1.00, 0.00, 0.50, 1.00, 0.50, 0.00, 0.50
meshcommandv: 0.00, 0.00, 1.00, 1.00, 0.00, 0.50, 1.00, 0.50, 0.50
count: 1
size: 10
vrt: 8, 3, 7, 0, 4, 1, 5, 2, 6, 3
FANTYPE 4 // Ten Face Pillar...
numvertices: 8
meshcommandu: 0.00, 1.00, 1.00, 0.00, 0.33, 0.66, 0.66, 0.33
meshcommandv: 0.00, 0.00, 1.00, 1.00, 0.33, 0.33, 0.66, 0.66
count: 2
size: 8
vrt: 7, 3, 0, 4, 5, 6, 2, 3
size: 6
vrt: 5, 4, 0, 1, 2, 6
FANTYPE 5 // Eighteen Faced Pillar...
numvertices: 16
meshcommandu: 0.00, 1.00, 1.00, 0.00, 0.33, 0.66, 1.00, 1.00,
0.66, 0.33, 0.00, 0.00, 0.33, 0.66, 0.66, 0.33
meshcommandv: 0.00, 0.00, 1.00, 1.00, 0.00, 0.00, 0.33, 0.66,
1.00, 1.00, 0.66, 0.33, 0.33, 0.33, 0.66, 0.66
count: 4
size: 10
vrt: 15, 3, 10, 11, 12, 13, 14, 8, 9, 3
size: 8
vrt: 13, 12, 4, 5, 1, 6, 7, 14
size: 4
vrt: 12, 11, 0, 4
size: 4
vrt: 14, 7, 2, 8
FANTYPE 6 // Blank...
numvertices: 0
count: 0
FANTYPE 7 // Blank...
numvertices: 0
count: 0
FANTYPE 8 // Six Faced Wall (WE)...
numvertices: 8
meshcommandu: 0.00, 1.00, 1.00, 0.00, 1.00, 1.00, 0.00, 0.00
meshcommandv: 0.00, 0.00, 1.00, 1.00, 0.33, 0.66, 0.66, 0.33
count: 2
size: 6
vrt: 5, 2, 3, 6, 7, 4
size: 4
vrt: 4, 7, 0, 1
FANTYPE 9 // Six Faced Wall (NS)...
numvertices: 8
meshcommandu: 0.00, 1.00, 1.00, 0.00, 1.00, 1.00, 0.00, 0.00
meshcommandv: 0.00, 0.00, 1.00, 1.00, 0.33, 0.66, 0.66, 0.33
count: 2
size: 6
vrt: 7, 3, 0, 4, 5, 6
size: 4
vrt: 6, 5, 1, 2
FANTYPE 10 // Blank...
numvertices: 0
count: 0
FANTYPE 11 // Blank...
numvertices: 0
count: 0
FANTYPE 12 // Eight Faced Wall (W)...
numvertices: 8
meshcommandu: 0.00, 1.00, 1.00, 0.00, 0.00, 0.00, 0.66, 0.66
meshcommandv: 0.00, 0.00, 1.00, 1.00, 0.66, 0.33, 0.33, 0.66
count: 2
size: 8
vrt: 7, 3, 4, 5, 6, 1, 2, 3
size: 4
vrt: 1, 6, 5, 0
FANTYPE 13 // Eight Faced Wall (N)...
numvertices: 8
meshcommandu: 0.00, 1.00, 1.00, 0.00, 0.33, 0.66, 0.66, 0.33
meshcommandv: 0.00, 0.00, 1.00, 1.00, 0.00, 0.00, 0.66, 0.66
count: 2
size: 8
vrt: 7, 3, 0, 4, 5, 6, 2, 3
size: 4
vrt: 2, 6, 5, 1
FANTYPE 14 // Eight Faced Wall (E)...
numvertices: 8
meshcommandu: 0.00, 1.00, 1.00, 0.00, 1.00, 1.00, 0.33, 0.33
meshcommandv: 0.00, 0.00, 1.00, 1.00, 0.33, 0.66, 0.33, 0.66
count: 2
size: 8
vrt: 6, 3, 0, 1, 4, 5, 7, 3
size: 4
vrt: 3, 7, 5, 2
FANTYPE 15 // Eight Faced Wall (S)...
numvertices: 8
meshcommandu: 0.00, 1.00, 1.00, 0.00, 0.66, 0.33, 0.33, 0.66
meshcommandv: 0.00, 0.00, 1.00, 1.00, 1.00, 1.00, 0.33, 0.33
count: 2
size: 8
vrt: 7, 5, 6, 0, 1, 2, 4, 5
size: 4
vrt: 0, 6, 5, 3
FANTYPE 16 // Ten Faced Wall (WS)...
numvertices: 10
meshcommandu: 0.00, 1.00, 1.00, 0.00, 0.66, 0.33, 0.00, 0.00, 0.66, 0.33
meshcommandv: 0.00, 0.00, 1.00, 1.00, 1.00, 1.00, 0.66, 0.33, 0.33, 0.66
count: 2
size: 8
vrt: 9, 3, 6, 7, 8, 4, 5, 3
size: 6
vrt: 8, 7, 0, 1, 2, 4
FANTYPE 17 // Ten Faced Wall (NW)...
numvertices: 10
meshcommandu: 0.00, 1.00, 1.00, 0.00, 0.33, 0.66, 0.00, 0.00, 0.33, 0.66
meshcommandv: 0.00, 0.00, 1.00, 1.00, 0.00, 0.00, 0.66, 0.33, 0.33, 0.66
count: 2
size: 8
vrt: 8, 6, 7, 0, 4, 5, 9, 6
size: 6
vrt: 9, 5, 1, 2, 3, 6
FANTYPE 18 // Ten Faced Wall (NE)...
numvertices: 10
meshcommandu: 0.00, 1.00, 1.00, 0.00, 0.33, 0.66, 1.00, 1.00, 0.66, 0.33
meshcommandv: 0.00, 0.00, 1.00, 1.00, 0.00, 0.00, 0.33, 0.66, 0.33, 0.66
count: 2
size: 8
vrt: 8, 9, 4, 5, 1, 6, 7, 9
size: 6
vrt: 9, 7, 2, 3, 0, 4
FANTYPE 19 // Ten Faced Wall (ES)...
numvertices: 10
meshcommandu: 0.00, 1.00, 1.00, 0.00, 1.00, 1.00, 0.66, 0.33, 0.33, 0.66
meshcommandv: 0.00, 0.00, 1.00, 1.00, 0.33, 0.66, 1.00, 1.00, 0.33, 0.66
count: 2
size: 8
vrt: 9, 7, 8, 4, 5, 2, 6, 7
size: 6
vrt: 8, 7, 3, 0, 1, 4
FANTYPE 20 // Twelve Faced Wall (WSE)...
numvertices: 12
meshcommandu: 0.00, 1.00, 1.00, 0.00, 1.00, 1.00, 0.66, 0.33,
0.00, 0.00, 0.66, 0.33
meshcommandv: 0.00, 0.00, 1.00, 1.00, 0.33, 0.66, 1.00, 1.00,
0.66, 0.33, 0.66, 0.66
count: 3
size: 9
vrt: 11, 3, 8, 9, 4, 10, 6, 7, 3
size: 5
vrt: 10, 4, 5, 2, 6
size: 4
vrt: 4, 9, 0, 1
FANTYPE 21 // Twelve Faced Wall (NWS)...
numvertices: 12
meshcommandu: 0.00, 1.00, 1.00, 0.00, 0.33, 0.66, 0.66, 0.33,
0.00, 0.00, 0.33, 0.33
meshcommandv: 0.00, 0.00, 1.00, 1.00, 0.00, 0.00, 1.00, 1.00,
0.66, 0.33, 0.33, 0.66
count: 3
size: 9
vrt: 10, 8, 9, 0, 4, 5, 6, 11, 8
size: 5
vrt: 11, 6, 7, 3, 8
size: 4
vrt: 6, 5, 1, 2
FANTYPE 22 // Twelve Faced Wall (ENW)...
numvertices: 12
meshcommandu: 0.00, 1.00, 1.00, 0.00, 0.33, 0.66, 1.00, 1.00,
0.00, 0.00, 0.33, 0.66
meshcommandv: 0.00, 0.00, 1.00, 1.00, 0.00, 0.00, 0.33, 0.66,
0.66, 0.33, 0.33, 0.33
count: 3
size: 9
vrt: 11, 8, 10, 4, 5, 1, 6, 7, 8
size: 5
vrt: 10, 8, 9, 0, 4
size: 4
vrt: 8, 7, 2, 3
FANTYPE 23 // Twelve Faced Wall (SEN)...
numvertices: 12
meshcommandu: 0.00, 1.00, 1.00, 0.00, 0.33, 0.66, 1.00, 1.00, 0.66, 0.33, 0.66, 0.66
meshcommandv: 0.00, 0.00, 1.00, 1.00, 0.00, 0.00, 0.33, 0.66, 1.00, 1.00, 0.33, 0.66
count: 3
size: 9
vrt: 11, 9, 4, 10, 6, 7, 2, 8, 9
size: 5
vrt: 10, 4, 5, 1, 6
size: 4
vrt: 4, 9, 3, 0
FANTYPE 24 // Twelve Faced Stair (WE)...
numvertices: 14
meshcommandu: 0.00, 1.00, 1.00, 0.00, 0.16, 0.33, 0.50, 0.66,
0.83, 0.83, 0.66, 0.50, 0.33, 0.16
meshcommandv: 0.00, 0.00, 1.00, 1.00, 0.00, 0.00, 0.00, 0.00,
0.00, 1.00, 1.00, 1.00, 1.00, 1.00
count: 3
size: 6
vrt: 13, 3, 0, 4, 5, 12
size: 6
vrt: 11, 12, 5, 6, 7, 10
size: 6
vrt: 9, 10, 7, 8, 1, 2
FANTYPE 25 // Twelve Faced Stair (NS)...
numvertices: 14
meshcommandu: 0.00, 1.00, 1.00, 0.00, 1.00, 1.00, 1.00, 1.00,
1.00, 0.00, 0.00, 0.00, 0.00, 0.00
meshcommandv: 0.00, 0.00, 1.00, 1.00, 0.16, 0.33, 0.50, 0.66,
0.83, 0.83, 0.66, 0.50, 0.33, 0.16
count: 3
size: 6
vrt: 13, 0, 1, 4, 5, 12
size: 6
vrt: 11, 12, 5, 6, 7, 10
size: 6
vrt: 9, 10, 7, 8, 2, 3
The texture positions will be corrected after loading for seamless tiling.
With the following code:
entry = 0;
while(entry < MAXMESHTYPE/2)
{
cnt = 0;
while(cnt < meshcommandnumvertices[entry])
{
meshcommandu[entry][cnt] = ((.6/32)+(meshcommandu[entry][cnt]*30.8/32))/8;
meshcommandv[entry][cnt] = ((.6/32)+(meshcommandv[entry][cnt]*30.8/32))/8;
cnt++;
}
entry++;
}
// Do for big tiles too
while(entry < MAXMESHTYPE)
{
cnt = 0;
while(cnt < meshcommandnumvertices[entry])
{
meshcommandu[entry][cnt] = ((.6/64)+(meshcommandu[entry][cnt]*62.8/64))/4;
meshcommandv[entry][cnt] = ((.6/64)+(meshcommandv[entry][cnt]*62.8/64))/4;
cnt++;
}
entry++;
}
And as last step, the tile texture offsets are generated:
entry = 0;
while(entry < MAXTILETYPE) {
offx = (entry & 7) / 8.0;
offy = (entry >> 3) / 8.0;
meshtileoffu[entry] = offx;
meshtileoffv[entry] = offy;
entry++;
}
