Help with a simple cached screen...

[lwdallas]

To overcome my BLITTER hurdles, I decided to cache my background off in a bmp. But I can't make it appear(???)for some reason.

If anyone has a moment.. what have I pooched up?plottest.zip

[+CyranoJ]

Couple of things:

 

int(650/8) * 8 = 648.... so 650 wide is not a valid width

you've created a CLUT based object (256c) and only loaded 8 colours

you've set it to animate once (after which it will remove itself - this is why you can't see it)

 

[lwdallas]

INTEGER MATH! Huge oversight..

 

ok, I am halfway there. The image is still off in position and color.

 

I changed assets.txt to gfx_clut16

I changed rapinit.s

I changed plottest.bas to jsfLoadClut(strptr(SPRITE_STARMAP_BACK),0,16) -- is that 16 colors? 16-bit?

 

Am I going in the right direction or am I worsening it?

plottest.zip

[lwdallas]

Screenshot:

 

 

[+CyranoJ]

6 hours ago, lwdallas said:

I changed assets.txt to gfx_clut16

Why? Its 8bit CLUT.

 

6 hours ago, lwdallas said:

I changed plottest.bas to jsfLoadClut(strptr(SPRITE_STARMAP_BACK),0,16) -- is that 16 colors? 16-bit?

16 is 16. 16bit is 65536.

 

6 hours ago, lwdallas said:

Am I going in the right direction or am I worsening it?

I'd suggest reading the manual and examples a bit more

[lwdallas]

2 hours ago, CyranoJ said:

I'd suggest reading the manual and examples a bit more

always the correct answer

[lwdallas]

@CyranoJAh, screen resolution is a mystery on the Jaguar I need to dip into. Everyone seems to have different opinions on it.

 

I have made advances but I am tripped up by an offset somewhere. Do you have advice?

Attaching project for anyone able to advise.

 

Btw, my whiny posts are by no means complaints. I love JagStudio and I am trying to get on top of the concepts that are new to me!

plottest.zip

[lwdallas]

SO close! I am missing the offset on the background images and the 3-d cursor sprite is messing up the color table somehow...

 

plottest.zip

[Sporadic]

I'm not really sure what the problem is. Which offset are you asking about?

 

If it's to do with where the plot command is drawing in relation to the other sprites, then plot draws directly into the text/particle layer, which is the last object in your object list in rapinit.s. So you can see it's X and y position in there. 

 

If it's something else, then please add further description.

[lwdallas]

4 hours ago, Sporadic said:

If it's to do with where the plot command is drawing in relation to the other sprites, then plot draws directly into the text/particle layer, which is the last object in your object list in rapinit.s. So you can see it's X and y position in there. 

Oh! I didn't know that. Thanks for that valuable tidbit.

 

The offset I am concerned about is the position the background is displayed is several pixels to the right of the screen edge, lining up with the middle of the "B" text. In rapinit.s I have it placed at 0,0. How do I pull it over to the left?

 

Thanks for the reply, @Sporadic

[OVERRiDE]

5 hours ago, lwdallas said:

Oh! I didn't know that. Thanks for that valuable tidbit.

 

The offset I am concerned about is the position the background is displayed is several pixels to the right of the screen edge, lining up with the middle of the "B" text. In rapinit.s I have it placed at 0,0. How do I pull it over to the left?

 

Thanks for the reply, @Sporadic

Just subtract however many pixels you need to offset from your X position, i.e (-16, 0) instead of (0,0)

 

Alternatively chop that many pixels off in your image editor.  Just make sure your image width is evenly divisible by 16 for the Jag

[lwdallas]

There is more to it. The left edge of the image is the grey line. Why isn't that at 0,0?

 

I would like to control that extra real estate where the letters exist.

 

Does that make sense, @OVERRiDE