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package messages
import (
"github.com/pektezol/bitreader"
)
type SvcBspDecal struct {
Pos []vectorCoord
DecalTextureIndex int16
EntityIndex int16
ModelIndex int16
LowPriority int8
}
type vectorCoord struct {
Value float32
Valid bool
}
func ParseSvcBspDecal(reader *bitreader.ReaderType) SvcBspDecal {
svcBspDecal := SvcBspDecal{
Pos: readVectorCoords(reader),
DecalTextureIndex: int16(reader.TryReadBits(9)),
}
if reader.TryReadBool() {
svcBspDecal.EntityIndex = int16(reader.TryReadBits(11))
svcBspDecal.ModelIndex = int16(reader.TryReadBits(11))
}
svcBspDecal.LowPriority = int8(reader.TryReadBits(1))
return svcBspDecal
}
func readVectorCoords(reader *bitreader.ReaderType) []vectorCoord {
const COORD_INTEGER_BITS uint8 = 14
const COORD_FRACTIONAL_BITS uint8 = 5
const COORD_DENOMINATOR uint8 = 1 << COORD_FRACTIONAL_BITS
const COORD_RESOLUTION float32 = 1.0 / float32(COORD_DENOMINATOR)
readVectorCoord := func() float32 {
value := float32(0)
integer := reader.TryReadBits(1)
fraction := reader.TryReadBits(1)
if integer != 0 || fraction != 0 {
sign := reader.TryReadBits(1)
if integer != 0 {
integer = reader.TryReadBits(int(COORD_INTEGER_BITS)) + 1
}
if fraction != 0 {
fraction = reader.TryReadBits(int(COORD_FRACTIONAL_BITS))
}
value = float32(integer) + float32(fraction)*COORD_RESOLUTION
if sign != 0 {
value = -value
}
}
return value
}
x := reader.TryReadBits(1)
y := reader.TryReadBits(1)
z := reader.TryReadBits(1)
return []vectorCoord{{Value: readVectorCoord(), Valid: x != 0}, {Value: readVectorCoord(), Valid: y != 0}, {Value: readVectorCoord(), Valid: z != 0}}
}
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