Hunting Down Invalid BGL Opcodes

[dvslats]

Hi All,
Would anyone know how to find these in a .sca file ?

An example from the log .txt


[3] BGL_RESLIST (0x1A) found at 0x1E6342
[4] Interpolation Table found at 0x1E6414
[4] BGL_RETURN (0x22) found at 0x1E64BE
[4] Interpolation Table found at 0x1E64C0
[4] BGL_RETURN (0x22) found at 0x1E64C2
.................................................. .................................................. Invalid BGL Opcodes (0x43) found at 0x1E64C4
[4] Interpolation Table found at 0x1E64C6
[4] BGL_RETURN (0x22) found at 0x1E64C8
[4] BGL_IFIN1 (0x24) found at 0x1E64CA

What would 0x1E64C4 translate to in scasm ?

Thanks In Advance, Dave

[simonu]

Hi Dave, are you compiling an .asm with bglc? and it is throwing an error?

the opcode 0x43 is a valid opcode

BGLOP_NEW_TEXTURE EQU 000000043h
Technical info from fs2k sdk


BGL_TEXTURE2 (0x43) – Loads a texture map to cover a surface (polygon). This is also an implied BGL_SURFACE.

Length variable (contained in the command)
ENUM16 opcode BGLOP_TEXTURE2 = 0x43
UINT16 length total length of the command in bytes
UINT16 index internal index MUST BE 0
FLAGS8 characteristics the characteristics of this texture
category:3 bits 0-2 category of this texture. Used to be able to
turn these categories on and off, but that was
removed in version 7.0. (0 = None, 1 = aircraft, 2 =
map, 3 = water, 4 = sky, 5 = ground, 6 = buildings,
7 = effects)
season_spring:1 bit 3 has spring seasonal texture (a “_SP” is
appended to the base name for the spring texture
name)
season_fall:1 bit 4 has fall seasonal texture (a “_FA” is appended
to the base name for the fall texture name)
season_winter:1 bit 5 has a winter seasonal texture (a “_WI” is
appended to the base name for the fall texture
name)
season_hard:1 bit 6 has a hard winter texture (a “_HW” is
appended to the base name for the hard winter
texture name)
light_map:1 bit 7 has a light map texture that can be blended at
dawn and dusk (a “_LM” is appended to the base
name for the light map texture name)
UINT8 checksum internal checksum MUST BE 0
UNICOL color fall back color until the texture loads or if it does
not load
STRINGZ name [], 0, [0] filename of the texture. Must be terminated with a
0. Another 0 is added if it is an odd length.



What would 0x1E64C4 translate to in scasm?
Well 0x1E64C4 is a byte offset. Open the file in a hex editor and you will find it easily.
BGLC and SCASM both use symbolic lables, in scasm a label starts: it could be :L001E64C4 but it is a label it could be :anylabelyoulike and still be valid.

[dvslats]

Hey There simonu,

are you compiling an .asm with bglc? and it is throwing an error?
Yes sir, that's what I'm attempting to do. They are some extremal stores from an Fs9 model. Don't want to say from what on a public forum, but that's what it is.

With what you have posted in your reply, me thinks now that the light map is the bugger. I got bit from that byte. :kilroy:

Thanks Simon for giving my brain a kick start.
Dave

[simonu]

BGLC and SCASM, reading the same meaning from two different dialects.