Implement powerup generators

[jakubg1]

A powerup generator would be a JSON file containing spawnable powerups and corresponding chances and spawn conditions.

Some important changes would be made as a result:

• Spawn weights no longer would be needed to be defined via config.json
• Colorized powerups would cease, and they would be split into variants for each color
• Each level would need to have a powerup generator specified instead of a list of available powerups

Example:

vanilla_generator.json

{
  "entries":[
    {"type":"powerup","name":"wild","weight":1000},
    {"type":"powerup","name":"fireball","weight":500},
    {"type":"powerup","name":"lightning","weight":500},
    {"type":"powerup","name":"stop","weight":1000},
    {"type":"powerup","name":"slow","weight":1000},
    {"type":"powerup","name":"reverse","weight":1000},
    {"type":"powerup","name":"speedshot","weight":1000},
    {"type":"powerup_generator","generator":"vanilla_generator_colorbomb.json","weight":500}
  ],
  "fallback":[
    {"type":"powerup_generator","generator":"vanilla_gem.json"}
  ]
}

vanilla_generator_colorbomb.json

{
  "entries":[
    {"type":"powerup","name":"colorbomb_1","conditions":[{"type":"color_present","color":1}]},
    {"type":"powerup","name":"colorbomb_2","conditions":[{"type":"color_present","color":2}]},
    {"type":"powerup","name":"colorbomb_3","conditions":[{"type":"color_present","color":3}]},
    {"type":"powerup","name":"colorbomb_4","conditions":[{"type":"color_present","color":4}]},
    {"type":"powerup","name":"colorbomb_5","conditions":[{"type":"color_present","color":5}]},
    {"type":"powerup","name":"colorbomb_6","conditions":[{"type":"color_present","color":6}]},
    {"type":"powerup","name":"colorbomb_7","conditions":[{"type":"color_present","color":7}]}
  ]
}

How would it work:

First, upon generator data usage, all powerups that do not meet the conditions (if specified) should be removed from the list. Then, from the remaining entries, pick one. When no entries are left, use fallback generator if specified. Else, don't spawn anything.

Notes

• When weight is omitted, it defaults to 1.
• When conditions are omitted, no checks are performed.
• Example condition types:
  • color_present - check if a given color exists on the board.
  • level_number - check if the current level is a number that equals/is in range of number.

[jakubg1]

Implemented in https://github.com/jakubg1/OpenSMCE/commit/dc0fd91f651cf505141e9e7c27a285e7468e1290

To do:

• Remove the code for old powerup generator, notably "colored" function
• Make the powerup generator switchable for each level

[jakubg1]

Done: https://github.com/jakubg1/OpenSMCE/commit/4211f130d5a873e73cbd46cd1ef25fa3630377b1