Bioregenerative Crop-Atmosphere Model (2D)

The 3D original spins a hydroponic ring around a scene with four decorative sliders (an "agriculture level," a "crop level" and a "sustainability level" with no computed relationship to one another or to what's on screen). This 2D companion replaces that with a real physiologically based crop model: each plant's photosynthetic capacity is the product of independent light, CO₂, temperature and nutrient-EC stress factors — the same multiplicative-limitation approach crop models like DSSAT and APSIM use — driving logistic biomass growth that saturates at canopy capacity instead of growing without bound. Because this is meant to be grown inside a sealed habitat, the model goes one step further than a standalone growth chamber: net canopy photosynthesis pulls the habitat's CO₂ down and pushes its O₂ up, a life-support scrubber only partially compensates toward your CO₂ setpoint, and a crew-size slider adds a constant respiration load — so the "O₂ self-sufficiency" readout genuinely tracks whether the canopy you've configured could keep a crew breathing, not just whether it looks green.