// activate soil on slot with different soil
public void ChangeSoil(Slot slot)
{
Plant plant = plants[slot.plantIndex];
Soil soil = SOILS[heldSoilIndex];
Color c = Color.white;
switch (soil)
{
case Soil.ash:
c = ashColor;
break;
case Soil.bonechar:
c = boneCharColor;
break;
case Soil.dirt:
c = dirtColor;
break;
case Soil.sand:
c = sandColor;
break;
case Soil.tar:
c = tarColor;
break;
}
plant.ChangeSoil(soil, slot, c);
heldSoilIndex = -1;
// TODO: disappear model to represent it being used up
}