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elhobbs

you want to update the map and scroll position during vblank. your code waits for vblank after the updating the map and scroll position.

EDIT: of course you are probably going to have issues trying to read that much data from disk during vblank.

elhobbs

Don't forget to flush data cache before dma. You should be able to find an optimized asm memcpy if you search this forum. It seam to remember that it may be best at main to main copies. It may require aligned buffers but so does dma.

elhobbs

not sure if this has already been mentioned, but DMA copies are best for main ram to vram copies. main ram to main ram copies do not perform as well with DMA copies.

elhobbs

Well, that explains everything! It must have been a mistake in the example then - thank you for the fast response! I take it that I can still use commas to separate expressions that I want to use together? Like: for(i=0;i<5;i++, foo--){...} Sorry for not checking myself - I'm on mobile so I can't c...

elhobbs

you are not quite right...

for(i=0;i<6;i+2){...}

is not valid

more like this

Code: Select all

for(initialize;condition;evalute after each loop before condition) {
    //do stuff
}

it works like this

Code: Select all

initialize;
while(condition) {
    //do stuff
    evalute after each loop before condition
}

elhobbs

glTexImage2D and glCallList do not take filenames as parameters. where you are specifying filenames they are actually looking for buffers where the data representing the object have been loaded. look at the libfat examples for how to read data from files. of course this assumes that the data in the ...

elhobbs

Why do you need to clear? Just load the new background over the old one.

elhobbs

The console refers to a text console. It is where the text from printf is displayed. Without this call it if not going to display stdout. The parameters to the function describe the screen resolution and the region of the screen to print to. In particular the 20, 20 values set the start x and y valu...

elhobbs

your code example does not reflect the question you are asking, so it is a little hard to answer. in the question you asked the variable should change to 7 since you did not indicate that a new local variable was created. In the code example you provided you did create a new local variable. That bei...

elhobbs

You need to read up on "scope" and local variables in C. The { character creates a new scope. Variables created at in a scope go away when the matching } character is reached. These variables are called local variables. I think you will find learning C/C++ by forum posting to be very frustrating. I ...

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