Jonas Reith
53e371bb2f
World-Creation stage after biomes. Two layers (raylib-free engine):
- Per-cell density scalars (flora/fauna/funga in [0,1]) derived from the
climate fields each tick (drive color modes 8/9/0). Flora = Liebig-min of
temp & moisture; fauna ~ flora with carnivores gated on local prey; funga =
moisture/organic-matter-led + cold-tolerant. Zero on water/ice.
- On-demand discrete population (key L, saved as v7): each land cell draws
broad archetypes from a comprehensive table into a per-kind slot cap +
density-scaled point budget (size -> cost), weighted by biome/climate
suitability and a regional bonus for same-biome neighbours. Separate RNG
seeded from cfg.seed so generating biota never perturbs tectonic determinism.
Organisms are labelled by taxonomy (Family + Size + role, e.g. "Felidae
(Big, Carnivore)") with the full Class > Order > Family tree stored, never an
informal common name. Cell-info panel word-wraps + aggregates duplicates so the
lists no longer get cut off.
New: src/sim/PlanetBiota.{hpp,cpp} + PlanetFlora/Fauna/FungiGen.cpp, color
modes/colors, bio* config knobs, save v7 (older saves load with empty
population), test_biota.cpp (densities, fauna<=capacity, carnivore gating,
slot/point budgets, determinism + RNG isolation, v7 round-trip). Docs updated.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
369 lines
7.3 KiB
Markdown
369 lines
7.3 KiB
Markdown
Flora Generation Plan
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For flora, I want the system to generate plant life based on biome, climate, terrain, water availability, and regional consistency. Like fauna, flora should not always be exact real-world species, but broader plant types that fit naturally into the environment.
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1. Basic Plant Types
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First, we should define basic plant categories that can appear across many environments, with variations depending on biome and climate.
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For example:
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Grasses
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Dry grass in savannas
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Marsh grass in wetlands
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Alpine grass in mountains
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Shrubs
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Desert shrubs
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Thorny shrubs
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Berry bushes
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Trees
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Tropical trees
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Conifer trees
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Deciduous trees
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Mangrove trees
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Fungi
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Forest mushrooms
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Swamp fungi
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Cave fungi
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These should work similarly to the “basic animal types” from the fauna system. A plant type can exist in many places, but its exact form changes depending on the environment.
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2. Flora Classification
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Flora should be described using broad plant groups rather than exact species.
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Possible classification fields:
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Plant group
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Growth form
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Size category
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Climate preference
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Water requirement
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Terrain preference
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Ecological role
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Example:
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text
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Plant: Desert shrub
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Group: Angiosperm
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Growth Form: Shrub
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Size: Small
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Climate: Arid / Hot
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Water Requirement: Low
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Terrain: Sandy / Rocky
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Role: Ground cover / Food source
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Another example:
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text
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Plant: Giant rainforest tree
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Group: Angiosperm
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Growth Form: Tree
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Size: Huge
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Climate: Tropical / Humid
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Water Requirement: High
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Terrain: Soil-rich lowland
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Role: Canopy / Habitat
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Possible growth forms:
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Grass
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Moss
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Fern
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Shrub
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Bush
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Tree
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Vine
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Reed
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Cactus / succulent
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Fungus
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Aquatic plant
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Possible size categories:
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Tiny
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Small
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Medium
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Big
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Huge
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3. Biome-Based Flora
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Each biome should have a set of likely plant types.
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Examples:
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Desert
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Likely flora:
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Cacti / succulents
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Dry shrubs
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Thorn bushes
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Sparse grasses
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Drought-resistant flowers
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Rare flora:
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Oasis trees
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Reeds near water
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Desert fungi after rain
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Forest
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Likely flora:
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Deciduous trees
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Conifer trees
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Ferns
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Moss
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Mushrooms
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Berry bushes
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Rare flora:
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Ancient giant trees
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Poisonous flowers
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Medicinal herbs
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Swamp / Wetland
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Likely flora:
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Reeds
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Mangroves
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Water lilies
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Moss
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Wetland grasses
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Fungi
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Rare flora:
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Carnivorous plants
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Giant swamp trees
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Rare medicinal roots
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Grassland / Steppe
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Likely flora:
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Grasses
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Wildflowers
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Small shrubs
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Herbs
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Rare flora:
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Lone trees
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Thorn bushes
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Seasonal flowers
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Mountain / Alpine
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Likely flora:
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Alpine grass
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Lichens
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Moss
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Small shrubs
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Hardy flowers
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Rare flora:
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Ancient mountain trees
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Rare herbs
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Snow-resistant plants
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Tundra
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Likely flora:
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Moss
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Lichens
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Low shrubs
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Cold-resistant grasses
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Rare flora:
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Seasonal flowers
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Fungi
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Hardy berry bushes
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4. Cell Population System
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Flora can also use a slot and point system, similar to fauna.
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For example:
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Each cell has 15 flora slots
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Each cell has 30 flora points
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Plants are added until either the slots or points are filled.
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Suggested point cost by size:
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Size Point Cost
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Tiny 1
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Small 2
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Medium 3
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Big 5
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Huge 8
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Flora may need more slots than fauna because plants are usually more numerous and layered.
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A cell could contain:
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text
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Cell Flora:
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- Forest floor moss, Tiny, 1 point
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- Ferns, Small, 2 points
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- Berry bushes, Small, 2 points
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- Deciduous trees, Big, 5 points
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- Ancient oak-like trees, Huge, 8 points
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The system stops adding plants once either:
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All flora slots are filled, or
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All flora points are used
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5. Flora Layers
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To make flora feel more natural, each cell can have vegetation layers.
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Possible layers:
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Ground layer
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Herb layer
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Shrub layer
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Understory layer
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Canopy layer
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Aquatic layer
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Not every biome needs every layer.
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Example for a forest:
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text
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Ground Layer: Moss, fungi
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Herb Layer: Ferns, flowers
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Shrub Layer: Berry bushes
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Understory Layer: Young trees
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Canopy Layer: Large trees
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Example for a desert:
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text
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Ground Layer: Dry grass, small succulents
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Shrub Layer: Thorn bushes
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Tree Layer: Rare oasis trees
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This helps prevent weird combinations, like a dense rainforest canopy appearing in a dry desert cell.
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6. Climate and Terrain Rules
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Flora should be strongly influenced by environmental conditions.
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Important factors:
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Temperature
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Rainfall
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Soil quality
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Terrain type
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Elevation
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Nearby water
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Sunlight
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Seasonality
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Examples:
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High rainfall increases trees, moss, ferns, and fungi.
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Low rainfall increases cacti, succulents, dry shrubs, and sparse grasses.
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Cold climate increases moss, lichen, conifers, and low shrubs.
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High elevation reduces large trees and favors alpine plants.
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Wet terrain increases reeds, aquatic plants, mangroves, and swamp trees.
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Poor soil reduces plant density.
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Fertile soil increases plant diversity and size.
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7. Regional Distribution
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Like fauna, flora should check neighboring cells to create a more natural and homogeneous distribution.
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Rules could be:
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Same biome and same climate: high probability of sharing the same flora.
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Same climate but different terrain: moderate probability of similar flora.
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Different climate: generate new flora.
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Nearby rivers, lakes, and coasts can spread wetland or aquatic plants.
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Mountain ranges, deserts, and oceans can act as barriers to plant spread.
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This means forests should gradually change into grasslands or swamps instead of switching completely from one cell to the next.
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8. Rarity and Special Plants
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The system should support common, uncommon, rare, and unique flora.
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Possible rarity levels:
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Common
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Uncommon
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Rare
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Very rare
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Unique
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Examples:
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text
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Common: Grass, moss, reeds
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Uncommon: Berry bushes, medicinal herbs
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Rare: Carnivorous plants, glowing mushrooms
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Very Rare: Ancient trees, magical flowers
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Unique: World-tree fragment, legendary herb
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Rarity can be affected by biome and world rules.
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For example:
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Carnivorous plants are rare in swamps.
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Glowing mushrooms are rare in caves or dark forests.
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Ancient trees are rare in old forests.
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Medicinal herbs are uncommon in mountains or forests.
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9. Ecological Role
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Each plant type should have an ecological role. This can later connect flora to fauna, crafting, survival, or gameplay systems.
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Possible roles:
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Food source
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Shelter
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Nesting material
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Medicine
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Poison
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Crafting material
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Building material
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Fuel
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Soil stabilizer
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Water indicator
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Magical / special resource
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Example:
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text
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Plant: Berry bush
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Growth Form: Bush
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Size: Small
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Climate: Temperate
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Water Requirement: Medium
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Role: Food source for animals and humans
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Example:
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text
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Plant: Thorn shrub
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Growth Form: Shrub
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Size: Small
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Climate: Arid
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Water Requirement: Low
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Role: Shelter for small animals, natural barrier
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10. Overall Goal
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The goal is to create a flora system that feels natural, biome-based, and regionally consistent. Plants should be generated from broad categories, growth forms, ecological roles, and environmental requirements rather than needing to define every exact species.
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The flora system should also support later gameplay features such as animal habitats, food chains, crafting materials, medicine, poison, and rare discoveries.
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