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package packetentitydelta
import (
"github.com/osm/quake/common/buffer"
"github.com/osm/quake/common/context"
"github.com/osm/quake/protocol"
"github.com/osm/quake/protocol/fte"
"github.com/osm/quake/protocol/mvd"
)
type Command struct {
AngleSize uint8
CoordSize uint8
FTEProtocolExtension uint32
MVDProtocolExtension uint32
bits uint16
Number uint16
MoreBits byte
EvenMoreBits byte
YetMoreBits byte
ModelIndex byte
Frame byte
ColorMap byte
Skin byte
Effects byte
Coord [3]float32
Angle [3]float32
Trans byte
ColorMod [3]byte
}
func (cmd *Command) Bytes() []byte {
buf := buffer.New()
writeAngle := buf.PutAngle8
if cmd.AngleSize == 2 {
writeAngle = buf.PutAngle16
}
writeCoord := buf.PutCoord16
if cmd.CoordSize == 4 || cmd.MVDProtocolExtension&mvd.ExtensionFloatCoords != 0 {
writeCoord = buf.PutCoord32
}
bits := cmd.bits
bits &= ^uint16(511)
if bits&protocol.UMoreBits != 0 {
buf.PutByte(cmd.MoreBits)
bits |= uint16(cmd.MoreBits)
}
var moreBits uint16
if bits&fte.UEvenMore != 0 && cmd.FTEProtocolExtension > 0 {
buf.PutByte(cmd.EvenMoreBits)
moreBits = uint16(cmd.EvenMoreBits)
if cmd.EvenMoreBits&fte.UYetMore != 0 {
buf.PutByte(cmd.YetMoreBits)
moreBits |= uint16(cmd.YetMoreBits) << 8
}
}
if bits&protocol.UModel != 0 {
buf.PutByte(cmd.ModelIndex)
}
if bits&protocol.UFrame != 0 {
buf.PutByte(cmd.Frame)
}
if bits&protocol.UColorMap != 0 {
buf.PutByte(cmd.ColorMap)
}
if bits&protocol.USkin != 0 {
buf.PutByte(cmd.Skin)
}
if bits&protocol.UEffects != 0 {
buf.PutByte(cmd.Effects)
}
if bits&protocol.UOrigin1 != 0 {
writeCoord(cmd.Coord[0])
}
if bits&protocol.UAngle1 != 0 {
writeAngle(cmd.Angle[0])
}
if bits&protocol.UOrigin2 != 0 {
writeCoord(cmd.Coord[1])
}
if bits&protocol.UAngle2 != 0 {
writeAngle(cmd.Angle[1])
}
if bits&protocol.UOrigin3 != 0 {
writeCoord(cmd.Coord[2])
}
if bits&protocol.UAngle3 != 0 {
writeAngle(cmd.Angle[2])
}
if moreBits&fte.UTrans != 0 && cmd.FTEProtocolExtension&fte.ExtensionTrans != 0 {
buf.PutByte(cmd.Trans)
}
if moreBits&fte.UColorMod != 0 && cmd.FTEProtocolExtension&fte.ExtensionColorMod != 0 {
for i := 0; i < len(cmd.ColorMod); i++ {
buf.PutByte(cmd.ColorMod[i])
}
}
return buf.Bytes()
}
func Parse(ctx *context.Context, buf *buffer.Buffer, bits uint16) (*Command, error) {
var err error
var cmd Command
cmd.FTEProtocolExtension = ctx.GetFTEProtocolExtension()
cmd.MVDProtocolExtension = ctx.GetMVDProtocolExtension()
cmd.AngleSize = ctx.GetAngleSize()
readAngle := buf.GetAngle8
if cmd.AngleSize == 2 {
readAngle = buf.GetAngle16
}
cmd.CoordSize = ctx.GetCoordSize()
readCoord := buf.GetCoord16
if cmd.CoordSize == 4 || cmd.MVDProtocolExtension&mvd.ExtensionFloatCoords != 0 {
readCoord = buf.GetCoord32
}
cmd.Number = bits & 511
cmd.bits = bits
bits &= ^uint16(511)
if bits&protocol.UMoreBits != 0 {
if cmd.MoreBits, err = buf.ReadByte(); err != nil {
return nil, err
}
bits |= uint16(cmd.MoreBits)
}
var moreBits uint16
if bits&fte.UEvenMore != 0 && cmd.FTEProtocolExtension > 0 {
if cmd.EvenMoreBits, err = buf.ReadByte(); err != nil {
return nil, err
}
moreBits = uint16(cmd.EvenMoreBits)
if cmd.EvenMoreBits&fte.UYetMore != 0 {
if cmd.YetMoreBits, err = buf.ReadByte(); err != nil {
return nil, err
}
yetMoreBits := uint16(cmd.YetMoreBits)
moreBits |= yetMoreBits << 8
}
}
if bits&protocol.UModel != 0 {
if cmd.ModelIndex, err = buf.ReadByte(); err != nil {
return nil, err
}
}
if bits&protocol.UFrame != 0 {
if cmd.Frame, err = buf.ReadByte(); err != nil {
return nil, err
}
}
if bits&protocol.UColorMap != 0 {
if cmd.ColorMap, err = buf.ReadByte(); err != nil {
return nil, err
}
}
if bits&protocol.USkin != 0 {
if cmd.Skin, err = buf.ReadByte(); err != nil {
return nil, err
}
}
if bits&protocol.UEffects != 0 {
if cmd.Effects, err = buf.ReadByte(); err != nil {
return nil, err
}
}
if bits&protocol.UOrigin1 != 0 {
if cmd.Coord[0], err = readCoord(); err != nil {
return nil, err
}
}
if bits&protocol.UAngle1 != 0 {
if cmd.Angle[0], err = readAngle(); err != nil {
return nil, err
}
}
if bits&protocol.UOrigin2 != 0 {
if cmd.Coord[1], err = readCoord(); err != nil {
return nil, err
}
}
if bits&protocol.UAngle2 != 0 {
if cmd.Angle[1], err = readAngle(); err != nil {
return nil, err
}
}
if bits&protocol.UOrigin3 != 0 {
if cmd.Coord[2], err = readCoord(); err != nil {
return nil, err
}
}
if bits&protocol.UAngle3 != 0 {
if cmd.Angle[2], err = readAngle(); err != nil {
return nil, err
}
}
if moreBits&fte.UTrans != 0 && cmd.FTEProtocolExtension&fte.ExtensionTrans != 0 {
if cmd.Trans, err = buf.ReadByte(); err != nil {
return nil, err
}
}
if moreBits&fte.UColorMod != 0 && cmd.FTEProtocolExtension&fte.ExtensionColorMod != 0 {
for i := 0; i < len(cmd.ColorMod); i++ {
if cmd.ColorMod[i], err = buf.ReadByte(); err != nil {
return nil, err
}
}
}
return &cmd, nil
}
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