[Coco] My humble Coco3 sprite project update

[William Mikrut]

Lol...caffeine is essential!
Nice work!!
On Mar 19, 2015 10:07 PM, "Hugo Dufort" <hugo at seshat.ca> wrote:

> Oops. There is a typo in my message. I wanted to write:
> «I would like to THANK the people who have helped me».
>
> Too much work and not enough caffeine tonight.
>
> Hugo
>
> Le 2015-03-19 22:32, Hugo Dufort a écrit :
>
>> Hi! I would like to that the people who have helped me getting on track
>> with the Coco3 memory map, GIME and ASM. My humble Coco3 project is showing
>> some results, which I can post online. For now it will only be screenshots,
>> but eventually I'll post some videos as well. Here is what I have
>> accomplished so far:
>> - understand and use the hi-res graphics modes of the Coco3, set
>> palettes, map memory pages, etc.
>> - define and decode raster images using Base64 directly in the ASM code
>> (this memory block can be reused once the images are extracted and packed
>> to another area in memory)
>> - create Buffer structures (fast-rendering bitmaps with no transparency)
>> - create Sprite structures (fast-rendering bitmaps with transparency)
>> - create TileSet structures (very fast-rendering 8x8 tiles)
>> - render buffers, sprites and tiles
>> - animate sprites using buffers
>>
>> I have implemented, then abandoned my palette mask trick -- it was faster
>> than my current sprite technique, but not by much. I currently use an
>> optimization technique that interleaves the bitmap and its mask, which
>> allows me to load 2 pixels and their mask in each loop using a single
>> pointer. With the whole rendering loop working in A,B,X,Y (and sometimes
>> U), no need to push/read the stack.
>>
>> Right now I am working on page flipping and learning some addressing
>> modes of the 6809 that are still a mystery to me!
>>
>> Here is my first screenshot:
>> http://avantrad.ca/upload/hugo/coco3sprites1.png
>>
>>
>> Hugo Dufort
>>
>>
>>
>> ---
>> L'absence de virus dans ce courrier électronique a été vérifiée par le
>> logiciel antivirus Avast.
>> http://www.avast.com
>>
>>
>
> ---
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