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ent/decoders.go

@@ -23,10 +23,13 @@ func newFieldDecoder(n *Namespace, f *Field) decoder {
 		return decodeVarInt64
 	case "int8", "int16", "int32", "int64":
 		return decodeZigZag
-	case "float32":
+	case "CNetworkedQuantizedFloat", "float32":
 		return floatDecoder(f)
 	case "Vector":
 		return vectorDecoder(f)
+	case "CGameSceneNodeHandle":
+		// ehhh maybe no?
+		return decodeVarInt32
 	}
 
 	// the field is itself an entity contained within the outer entity.
@@ -46,18 +49,6 @@ func decodeVarInt32(br bit.Reader) interface{} { return bit.ReadVarInt32(br) }
 func decodeVarInt64(br bit.Reader) interface{} { return bit.ReadVarInt(br) }
 func decodeZigZag(br bit.Reader) interface{}   { return bit.ReadZigZag(br) }
 
-func floatDecoder(f *Field) decoder {
-	if f.bits <= 0 || f.bits >= 32 {
-		return ieeeFloat32Decoder
-	}
-	return nil
-}
-
-// reads an IEEE 754 binary float value off of the stream
-func ieeeFloat32Decoder(br bit.Reader) interface{} {
-	return math.Float32frombits(uint32(br.ReadBits(32)))
-}
-
 func entityDecoder(c *Class) decoder {
 	return func(br bit.Reader) interface{} {
 		if bit.ReadBool(br) {

ent/field.go

@@ -11,9 +11,9 @@ type Field struct {
 	_type             Symbol  // type of data held by the field
 	name              Symbol  // name of the field
 	sendNode          Symbol  // not sure what this is
-	bits              int      // number of bits used to encode field?
-	low               *float32 // lower limit of field values
-	high              *float32 // upper limit of field values
+	bits              uint    // number of bits used to encode field?
+	low               float32 // lower limit of field values
+	high              float32 // upper limit of field values
 	flags             int     // dunno what these flags do
 	serializer        *Symbol // class on which the field was defined
 	serializerVersion *int32  // version of the class on which the field was defined
@@ -34,12 +34,8 @@ func (f Field) String() string {
 	if f.flags > 0 {
 		fmt.Fprintf(&buf, " flags: %d", f.flags)
 	}
-	if f.low != nil {
-		fmt.Fprintf(&buf, " low: %f", *f.low)
-	}
-	if f.high != nil {
-		fmt.Fprintf(&buf, " high: %f", *f.high)
-	}
+	fmt.Fprintf(&buf, " low: %f", f.low)
+	fmt.Fprintf(&buf, " high: %f", f.high)
 	if f.serializer != nil {
 		fmt.Fprintf(&buf, " serializer: %s", *f.serializer)
 	}
@@ -56,10 +52,10 @@ func (f Field) String() string {
 func (f *Field) fromProto(flat *dota.ProtoFlattenedSerializerFieldT, t *SymbolTable) {
 	f._type = t.Symbol(int(flat.GetVarTypeSym()))
 	f.name = t.Symbol(int(flat.GetVarNameSym()))
-	f.bits = int(flat.GetBitCount())
+	f.bits = uint(flat.GetBitCount())
 	f.flags = int(flat.GetEncodeFlags())
-	f.low = flat.LowValue
-	f.high = flat.HighValue
+	f.low = flat.GetLowValue()
+	f.high = flat.GetHighValue()
 
 	if flat.FieldSerializerNameSym == nil {
 		f.serializer = nil

ent/float_decoders.go

@@ -0,0 +1,69 @@
+package ent
+
+import (
+	"math"
+
+	"github.com/jordanorelli/hyperstone/bit"
+)
+
+const (
+	f_round_down = 1 << iota
+	f_round_up
+	f_encode_zero
+	f_encode_ints
+)
+
+func floatDecoder(f *Field) decoder {
+	if f.bits <= 0 || f.bits >= 32 {
+		return ieeeFloat32Decoder
+	}
+
+	// a quantized field value must have some range specified, otherwise the
+	// quantization makes no sense.
+	if f.low == 0 && f.high == 0 {
+		panic("quantization rules make no sense")
+	}
+
+	flags := f.flags
+
+	// number of input steps
+	// steps := int(1<<f.bits - 1)
+
+	// keep the inverse to mult instead of divide later
+	// inv_steps := 1.0 / float32(steps)
+
+	// total range of values
+	span := f.high - f.low
+
+	if span < 0 {
+		panic("quantization span is backwards")
+	}
+
+	if flags&f_round_down&f_round_up > 0 {
+		panic("how can you round down and up at the same time")
+	}
+
+	// output width of each step
+	// step_width := span * inv_steps
+
+	return func(br bit.Reader) interface{} {
+		if flags&f_round_down > 0 {
+			return nil
+		}
+		if flags&f_round_up > 0 {
+			panic("round up flag not done yet")
+		}
+		if flags&f_encode_zero > 0 {
+			panic("encode zero flag not done yet")
+		}
+		if flags&f_encode_ints > 0 {
+			panic("encode ints flag not done yet")
+		}
+		return nil
+	}
+}
+
+// reads an IEEE 754 binary float value off of the stream
+func ieeeFloat32Decoder(br bit.Reader) interface{} {
+	return math.Float32frombits(uint32(br.ReadBits(32)))
+}

ent/selection.go

@@ -18,42 +18,36 @@ type selection struct {
 
 func (s selection) path() []int { return s.vals[:s.count] }
 
-func (s selection) fill(dest slotted, br bit.Reader) error {
+func (s selection) fill(offset int, dest slotted, br bit.Reader) error {
+	slot := s.vals[offset]
+
 	Debug.Printf("fill selection %v", s)
-	switch s.count {
+	switch s.count - offset {
 	case 0:
 		panic("selection makes no sense")
 	case 1:
-		fn := dest.getSlotDecoder(s.vals[0])
+		fn := dest.getSlotDecoder(slot)
 		if fn == nil {
 			switch v := dest.(type) {
 			case *Entity:
-				Info.Fatalf("%v entity has no decoder for slot %d (%v)", v.Class, s.vals[0], v.Class.Fields[s.vals[0]])
+				Info.Fatalf("%v entity has no decoder for slot %d (%v)", v.Class, slot, v.Class.Fields[slot])
 			default:
-				Info.Fatalf("slotted value %v has no decoder for slot %d", dest, s.vals[0])
+				Info.Fatalf("slotted value %v has no decoder for slot %d", dest, slot)
 			}
 		}
 		val := fn(br)
-		old := dest.getSlotValue(s.vals[0])
-		dest.setSlotValue(s.vals[0], val)
+		old := dest.getSlotValue(slot)
+		dest.setSlotValue(slot, val)
 		Debug.Printf("%v -> %v", old, val)
 		return nil
 	default:
 		Debug.Printf("fill child selection...")
-		inner := dest.getSlotValue(s.vals[0])
-		inner_s, ok := inner.(slotted)
+		v := dest.getSlotValue(slot)
+		vs, ok := v.(slotted)
 		if !ok {
 			return fmt.Errorf("child selection refers to a slot that doesn't contain a slotted value")
 		}
-		return s.next().fill(inner_s, br)
-	}
-}
-
-func (s selection) next() selection {
-	// rofl this is weird
-	return selection{
-		count: s.count - 1,
-		vals:  [6]int{s.vals[1], s.vals[2], s.vals[3], s.vals[4], s.vals[5], 0},
+		return s.fill(offset+1, vs, br)
 	}
 }
 

ent/slotted.go

@@ -17,7 +17,7 @@ func fillSlots(dest slotted, sr *selectionReader, br bit.Reader) error {
 	}
 
 	for _, s := range selections {
-		if err := s.fill(dest, br); err != nil {
+		if err := s.fill(0, dest, br); err != nil {
 			return err
 		}
 	}