1 files changed, 61 insertions, 0 deletions

diff --git a/pkg/messages/types/svcBspDecal.go b/pkg/messages/types/svcBspDecal.go
new file mode 100644
index 0000000..484497f
--- /dev/null
+++ b/pkg/messages/types/svcBspDecal.go
@@ -0,0 +1,61 @@
+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}}
+}