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Messages - Keoni29
Pages: 1 ... 68 69 [70] 71 72 ... 168
1036
« on: August 26, 2013, 03:44:33 am »
I wanna have an amiga for making music  I am not sure which one is the best model for that.
1037
« on: August 25, 2013, 12:00:07 pm »
Allright! Horizontal scrolling works now  I have to make it nicer now because it does not clip tiles yet. It's very very hackish. I modify the frame time for the back and front porch to get scrolling. I can scroll smoother than per pixel this way
1038
« on: August 24, 2013, 02:15:26 pm »
No, for consumers lcd screens are expensive. They are cheaper in bulks.
1039
« on: August 24, 2013, 02:14:24 pm »
Well with a non-moving test pattern obviously there is a little bit of flicker noticable, but otherwise it isn't too bad at all.
Edit: So I was testing this on an actual crt yesterday with a new kind of image. I noticed flicker occurs when the colors you blend are very different from eachother, so it is therefore recommended to only blend colors that are close to eachother and create a subtone. I also found out that horizontal scrolling is probably gonna be a bit hackish and is gonna require some cycle accurate coding. I don't use a bitmap framebuffer so shifting the display is done on the fly. The screen buffer contains pointers to tiles. There is another ram area where tiles are stored. You can address 256 tiles. At the moment the video generator just takes up one core out of 8, so I can just use up all cycles of this core. For other stuff I can use a different core.
I am going to experiment with interlacing. Perhaps interlacing gives me nicer color mixing.
1040
« on: August 24, 2013, 06:53:24 am »
And as for world maps: it really depends on the application. If your world consists of screens of tiles you should organize your data in a different manner than if your world consists of a large tile map. As for compression: If you only use 16 different tiles you can store two tiles in every byte instead of just one per byte. If you want to go even further you can replace all zero tiles with a zero followed by the number of zero tiles until a new kind of tile occurs. This technique is only suited if there is just a single tilemap in your appvar or if you indexed where all tilemaps start.
Example for storing 2 tiles in one byte:
.Not actual sourcecode:
.tile1 = 7
.tile2 = 3
.tile1 << 4 | tile2 = $73
.Axe syntax:
[73]Example for compressing zero tiles:
[15 00 26 00 00 00 00 00 00 00 00 24 A5]
.becomes
[15 00 01 26 00 08 24 A5]
.Downside to this technique is that single zero's will take up more space.
.Now to decompress:
.if the byte = 0
.load counter with next byte that defines the amount of zero's that should be inserted
.do
. insert 0 tile
. counter decrease
.while counter is not 0
.when the counter runs out go to the next tile and repeat the process until you aquired enough tiles.
1041
« on: August 24, 2013, 06:27:40 am »
The parallax multicore propeller chip has been around since 2006 I knew about it a year ago, but I never got one because they were very expensive in the Netherlands. The price dropped to €7 each, so I got one now. With the video hardware you can generate 4 colors per 16x1 pixels. I managed to get more colors per tile by alternating colors rapidly effectively adding colors. Instead of 4 colors per tile I have 16 now. Theoretically you could have around 300 possible colors with my technique instead of 102 from the box. I am gonna work on horizontal and vertical scanning and sprites today.
1042
« on: August 24, 2013, 05:15:24 am »
I should get an amiga too, but they are still quite expensive. Amiga's are more in demand than c64's!
1043
« on: August 24, 2013, 05:00:47 am »
You know what's crazy? A second hand crt television is a lot cheaper than a monochrome lcd. It also has the added benefit of being a color display and it has a larger resolution than those cheap 128*64 lcd displays.
1044
« on: August 23, 2013, 06:44:15 pm »
Is it cheaper than super turican?
1045
« on: August 23, 2013, 06:19:35 pm »
Problem: I think you need a monitor for this which I don't have 
It will work on any ntsc compatible television with composite video input. (pal looks like crap, but it is possible)
1046
« on: August 23, 2013, 10:31:04 am »
I am working on a new graphics engine for the propeller chip. This engine has 16 colors per tile instead of 4. It might even become 16 colors per 16x1 pixels, but I'm not sure yet. Tomorrow I will work on smooth scrolling and maybe sprites.
Edit: Forgot to attach the captured picture. This composite video comes from the propeller chip and is captured using a pci video capture device.
I blend two tiles together by alternating them rapidly to achieve this effect. One of the tiles has horizontal color bars and the other has vertical grayscale bars. You could blend together any color you like. I still have about 130 unused cycles in between tile processing and outputting pixel data, so I have some cyles left for sprites.
1047
« on: August 23, 2013, 03:44:21 am »
This person has a nicer video capture device: 
1048
« on: August 23, 2013, 03:37:42 am »
Wow yeah it looks like it IS turrican with different graphics and music 
1049
« on: August 22, 2013, 01:19:36 pm »
Nah not the shiny colors, but the overal feel of the UI makes it oldskool.
1050
« on: August 22, 2013, 01:15:40 pm »
I know it's oldschool for the CSE. It's the same with the Prime. I really like that about it. Even though it has a touchscreen it's not a windows clone.
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