Blitz Basic 2 Experimentation

All source can be compiled with Blitz Basic 2 - I suggest Ultimate Blitz Basic 2.1.

I also suggest the VSCode Blitz Basic Extension to type code, run code and package code for floppy, harddisk, CDTV and CD32 (Disclaimer : I am a contributor of the plugin).

1 - Bitmap with rainbow copper effect

Simple example using the copper to generate a vertical rainbow behind a bitmap. The rainbow can use color not in the palette (You get extra color).

Source

2 - Adding dual playfield for parallax effect

2 bitmaps with 3 bitplans (8 colors each).

Foreground bitmap using 0 to 7 palette.

Background bitmap using 8 to 15 palette.

Source

3 - Adding a lot of rain effect using sprite multiplexing - 16 colors sprites

Inpired from the trick from Agony game for the rain effect : https://codetapper.com/amiga/sprite-tricks/agony/

Using code from previous step to add a sprite multiplexing using Copper based on @earok code.

Limitation is I didn't figure out how to get this effect with the copper rainbow background.

Source

Required to have BB2OBJTYPES.RES in resident libs in compiler Option

3b - Adding a lot of rain effect using sprite multiplexing - 4 colors sprites

Same as 3 but in 4 color sprites so up to 7 sprites per line (last channel is for smooth scrolling).

Source

Required to have BB2OBJTYPES.RES in resident libs in compiler Option

4 - Rain effect using CustomSprites Blitz Basic 2 native sprite multiplexing - 4 colors sprites

Inpired from the trick from Agony game for the rain effect : https://codetapper.com/amiga/sprite-tricks/agony/

Using CustomSprites instruction for Blitz Basic 2.

Limitation is I didn't figure out how to get this effect with the copper rainbow background. (Still using copper)

Source