1 files changed, 85 insertions, 0 deletions
diff --git a/packet/command/particle/particle.go b/packet/command/particle/particle.go
new file mode 100644
index 0000000..b1f3942
--- /dev/null
+++ b/packet/command/particle/particle.go
@@ -0,0 +1,85 @@
+package particle
+
+import (
+	"github.com/osm/quake/common/buffer"
+	"github.com/osm/quake/common/context"
+	"github.com/osm/quake/protocol"
+)
+
+type Command struct {
+	AngleSize uint8
+	CoordSize uint8
+
+	Coord [3]float32
+	Angle [3]float32
+	Count byte
+	Color 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 {
+		writeCoord = buf.PutCoord32
+	}
+
+	buf.PutByte(protocol.SVCParticle)
+
+	for i := 0; i < 3; i++ {
+		writeCoord(cmd.Coord[i])
+	}
+
+	for i := 0; i < 3; i++ {
+		writeAngle(cmd.Angle[i])
+	}
+
+	buf.PutByte(cmd.Count)
+	buf.PutByte(cmd.Color)
+
+	return buf.Bytes()
+}
+
+func Parse(ctx *context.Context, buf *buffer.Buffer) (*Command, error) {
+	var err error
+	var cmd Command
+
+	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 {
+		readCoord = buf.GetCoord32
+	}
+
+	for i := 0; i < 3; i++ {
+		if cmd.Coord[i], err = readCoord(); err != nil {
+			return nil, err
+		}
+	}
+
+	for i := 0; i < 3; i++ {
+		if cmd.Angle[i], err = readAngle(); err != nil {
+			return nil, err
+		}
+	}
+
+	if cmd.Count, err = buf.ReadByte(); err != nil {
+		return nil, err
+	}
+
+	if cmd.Color, err = buf.ReadByte(); err != nil {
+		return nil, err
+	}
+
+	return &cmd, nil
+}