Server Help :: View topic - yet another question

Server Help

LVZ/LVL Questions - yet another question

Anonymous - Wed Jan 08, 2003 5:53 pm
Post subject: yet another question

Quote:

The only other current decompressed data type is the Object section. The object section is determined by having a File Time equal to 0 and the File Name length being 0.

Object Section always starts with this 12 byte header:
4-len str Type - Should be 'CLV1'. Future .lvz formats will have different types, so handle this gracefully. If not a CLV1, can ignore this decompressed data section, since it is of an unknown type for the Continuum .37 .lvz format.
i32 Object Count - How many object definitions are in this Object Section.
i32 Image Count - How many image definitions are in this Object Section.

Does that mean i loop once more through the files-header with filename = '' and time_t = 0???

How do i start the Objects-header?
I cant find the 'CLV1'-String in any lvz-file around here...

I ask, cuz DeBuildLevel doesnt recognize my Objects.

Oh, and @mgb: I only add objects if Map or ScreenCount > 0 so we dont have to worry about empty objects.

What i also don't really get is this i1 and i15 thing (not in the quote).
How do i put them together to an i16?
I need to put them togther to an i16, or?
i16 := Integer(String(i1)+String(i15)) ???

I hate to bother u all the time, but... well...

BTW: Where can i find a doc about lvl files?
(Ah... can't stop programming.... hehe, so fun)

Bob Dole.. Bob Dole... Bob Dole...... bob dole.... bob... dole....

Mine GO BOOM - Wed Jan 08, 2003 6:02 pm
Post subject: Re: yet another question

Bob Dole.. Bob Dole... Bob Dole...... bob dole.... bob... dole.... wrote:

Does that mean i loop once more through the files-header with filename = '' and time_t = 0???

That means that once you find a section that has the filename being empty and the time being 0, that is the only object section. Once you decompress the data after it like any other file, instead of saving it somewhere, you would call another function with that data in it.

Bob Dole.. Bob Dole... Bob Dole...... bob dole.... bob... dole.... wrote:

How do i start the Objects-header?
I cant find the 'CLV1'-String in any lvz-file around here...

Thats because the Object-Header is inside the compressed file section. Just like the file data is compressed, the object info is compressed just like it. So the CLV1 string is inside the compressed filedata of the thing stated above.

Bob Dole.. Bob Dole... Bob Dole...... bob dole.... bob... dole.... wrote:

What i also don't really get is this i1 and i15 thing (not in the quote).
How do i put them together to an i16?
I need to put them togther to an i16, or?
i16 := Integer(String(i1)+String(i15)) ???

i16 := i15 << 1 + i1
The << means 'leftshift'. So that moves the i15 data over one bit, so you can then add in that extra bit correctly. Search your language for how to do bit shifting.

Bob Dole.. Bob Dole... Bob Dole...... bob dole.... bob... dole.... wrote:

BTW: Where can i find a doc about lvl files?

The FACTs website had a very nice txt file on lvl information, and bmps. The lvl information is also stored with the bits being aligned differently, so first master the lvz's placement of data before you try to do one that is a bit more complex.

Anonymous - Wed Jan 08, 2003 6:17 pm
Post subject:

So lets see if i got this one...

I make my objects header like in lvzformat.txt.
Compress it.
And put it in the file-header as file-data, but the filenamelength is 0 and the time_t = 0, too?

k, this sould not be so hard at all...

Again that i1 and i15 thing:
Add i15 and i1 as a string or as an integer, cuz thats not the same..?
Or was this questions useless cuz i it adds the i1 in another byte as i15 cuz of the leftshift...

Uhm... and thanks for ur patience with me mbg.

Bob Dole.. Bob Dole... Bob Dole...... bob dole.... bob... dole....

SOS - Wed Jan 08, 2003 11:59 pm
Post subject:

Well, pick up a Delphi book/something about bitwise operations.
I would say you shouldn't use strings anywhere with LVZ files.

Oh and the Delphi shift operator was a really funkily named function that's name didn't seem to make any sense. Forgot what it was though.

Dr Brain - Thu Jan 09, 2003 9:47 am
Post subject:

i16 = (i15 * 2) + i1;

You guys and your 'levelshifting' are gonna confuse him. A << 1 is just a multiply by 2.

SOS - Thu Jan 09, 2003 10:51 am
Post subject:

Err... yea

Didn't think of that

Anonymous - Thu Jan 09, 2003 11:00 am
Post subject:

yep, confused...

and i had to reorginize all my dynamic arrays, from string to integer.

ill try that multiply
i found out how to leftshift, though.

And that i12 and i4...
i16 := (i12 *2) + i4;???

For some reason it doesn't recognize the objects...

Bob Dole.. Bob Dole... Bob Dole...... bob dole.... bob... dole....

Dr Brain - Thu Jan 09, 2003 11:08 am
Post subject:

Bob Dole.. Bob Dole... Bob Dole...... bob dole.... bob... dole.... wrote:

And that i12 and i4...
i16 := (i12 *2) + i4;

That is not correct, it would be

Code: Show/Hide

i16 = (i12 << 4) + i4;

Code: Show/Hide

i16 = (i12 * (2 ^ 4)) + i4;

The 4 in 2 ^ 4 is how many places you want to shift. This was not required in the above exampe because 2^1 = 2.

SOS - Thu Jan 09, 2003 12:41 pm
Post subject:

^ being exponent

Dr Brain - Thu Jan 09, 2003 1:41 pm
Post subject:

Yes ^ is exponenet. Also dont try this with 13 bits in the i12 or 6 bits in the i4 or... Doing so will have quite strange results.

Anonymous - Fri Jan 10, 2003 7:03 am
Post subject:

I know that ^ means exponent

Just delphi seems not to, lol...

neway...
I will start over with this lvz compiler, cuz at the moment it chrashes the whole delphi

Bob Dole.. Bob Dole... Bob Dole...... bob dole.... bob... dole....

nintendo64 - Fri Jan 10, 2003 2:59 pm
Post subject:

Delphi BitWise Operators

Operator Operation
not bitwise negation
and bitwise and
or bitwise or
xor bitwise xor
shl bitwise shift left
shr bitwise shift right

The operations x shl y and x shr y shift the value of x to the left or right by y bits, which is equivalent to multiplying or dividing x by 2^y; the result is of the same type as x. For example, if N stores the value 01101 (decimal 13), then N shl 1 returns 11010 (decimal 26). Note that the value of y is interpreted modulo the size of the type of x. Thus for example, if x is an integer, x shl 40 is interpreted as x shl 8 because an integer is 32 bits and 40 mod 32 is 8.

btw
Raises Base to any power.

Unit

Math

Category

Arithmetic routines

function Power(const Base, Exponent: Extended): Extended;

Description

Power raises Base to any power. For fractional exponents or exponents greater than MaxInt, Base must be greater than 0.

and

Calculates the integral power of a base value.

Unit

Math

Category

Arithmetic routines

function IntPower(const Base: Extended; const Exponent: Integer): Extended register;

Description

IntPower raises Base to the power specified by Exponent.

-nintendo64

Anonymous - Fri Jan 10, 2003 3:18 pm
Post subject:

The problem is not commands or ^

the lvz-compiler crashes whole delphi cuz of an acces violation
(usually happens when it tries to acces a dynamic array where there is none)

And if it does not crash, DebuildLevel says it cannot correctly decompress the object section...
So, at the moment, I'll stick with MakeLevel, and release 1.3.1 tomorrow.

Which will fix a bug, have a bigger objects-listbox and introducing a tiles2pixel convertor.

SOS - Sat Jan 11, 2003 5:02 am
Post subject:

Post your LVZ compiling code and/or the LVZ that it makes.