func (em *EntityManager) NewEntity(x, y float64, entType EntityType) uint64 {
em.lastEntityID += 1
// copy the properties from the data file
props := &EntityProperty{}
*props = *entityProperties[entType]
entity := &Entity{
Id: em.lastEntityID,
Type: entType,
inputs: make([]*InputRequest, 0),
Properties: props,
}
em.entities[entity.Id] = entity
data := structs.NewData()
data.Position.X = x
data.Position.Y = y
data.Orientation = 3.14 * 2
data.InvMass = props.invMass
data.Width = props.Width
data.Height = props.Height
em.physics[entity.Id] = NewPhysics(data)
em.physics[entity.Id].Data.Damping = 0.99
// em.forceRegistry.Add(em.physics[entity.Id], gravity)
if props.ai {
em.controllers[entity.Id] = NewBasicAI(entity.Id)
}
em.updated[entity.Id] = true
return entity.Id
}
func NewPhysics(data *structs.Data) *Physics {
data.MaxVelocity = 300
data.MaxAcceleration = 100
p := &Physics{
Data: data,
PrevData: structs.NewData(),
CollisionGeometry: &Circle{
Position: data.Position,
},
}
p.PrevData.Copy(p.Data)
if data.Width > data.Height {
p.CollisionGeometry.(*Circle).Radius = data.Width / 2
} else {
p.CollisionGeometry.(*Circle).Radius = data.Height / 2
}
return p
}