/
ai.go
85 lines (72 loc) · 1.51 KB
/
ai.go
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package system
import (
"github.com/ruloweb/asteroids/entity"
"math"
"os"
"strconv"
)
type AI struct {
width uint
height uint
genome []uint8
}
func NewAIFromPath(path string) (*AI, error) {
f, err := os.Open(path)
if err != nil {
return nil, err
}
defer f.Close()
// Width
b := make([]byte, 1)
_, err = f.Read(b)
if err != nil {
return nil, err
}
width, err := strconv.Atoi(string(b[0] + 48))
if err != nil {
return nil, err
}
// Height
_, err = f.Read(b)
if err != nil {
return nil, err
}
height, err := strconv.Atoi(string(b[0] + 48))
if err != nil {
return nil, err
}
size := int(math.Pow(2, float64(width*(height+1))))
genome := make([]byte, size)
// Rest of the genome
_, err = f.Read(genome)
if err != nil {
return nil, err
}
// Decompress
genome2 := make([]uint8, size*4)
for i, b := range genome {
genome2[i*4] = decodeMove(b >> 6 & 0b00000011)
genome2[i*4+1] = decodeMove(b >> 4 & 0b00000011)
genome2[i*4+2] = decodeMove(b >> 2 & 0b00000011)
genome2[i*4+3] = decodeMove(b & 0b00000011)
}
ai := &AI{width: uint(width), height: uint(height), genome: genome2}
return ai, nil
}
func NewAIFromGenome(width uint, height uint, genome []uint8) *AI {
return &AI{width: width, height: height, genome: genome}
}
func decodeMove(b byte) uint8 {
switch b {
case 0b00000001:
return 1
case 0b00000010:
return 2
default:
return 0
}
}
func (ai *AI) GetMove(g *entity.Grid) uint8 {
pos := g.GetCellAsteroid()<<ai.width | uint64(g.GetCellShip())
return ai.genome[pos]
}