expose prop angles as quaternion

Cargo.toml

@@ -20,6 +20,7 @@ binrw = "0.8.0"
 static_assertions = "1.1.0"
 num_enum = "0.5.6"
 vbsp-derive = { path = "derive", version = "*" }
+cgmath = "0.18.0"
 
 [dev-dependencies]
 obj = "0.10"

src/data/game.rs

@@ -2,6 +2,7 @@ use crate::error::UnsupportedLumpVersion;
 use crate::{lzma_decompress_with_header, BspError, FixedString, Vector};
 use binrw::{BinRead, BinReaderExt, BinResult, ReadOptions};
 use bitflags::bitflags;
+use cgmath::{Deg, Quaternion, Rotation3};
 use std::borrow::Cow;
 use std::io::{Cursor, Read, Seek};
 use std::mem::size_of;
@@ -115,7 +116,7 @@ pub struct StaticPropLumps {
 #[derive(Debug, Clone)]
 pub struct StaticPropLump {
     pub origin: Vector,
-    pub angles: [f32; 3],
+    angles: [f32; 3],
     pub prop_type: u16,
     pub first_leaf: u16,
     pub leaf_count: u16,
@@ -131,6 +132,16 @@ pub struct StaticPropLump {
     pub lightmap_resolution: [u16; 2],
 }
 
+impl StaticPropLump {
+    /// Get the rotation of the prop as quaternion
+    pub fn rotation(&self) -> Quaternion<f32> {
+        // angles are applied in roll, pitch, yaw order
+        Quaternion::from_angle_y(Deg(self.angles[1]))
+            * Quaternion::from_angle_x(Deg(self.angles[0]))
+            * Quaternion::from_angle_z(Deg(self.angles[2]))
+    }
+}
+
 impl BinRead for StaticPropLump {
     type Args = (u16,);
 

src/data/vector.rs

@@ -1,5 +1,6 @@
 use crate::error::EntityParseError;
 use binrw::BinRead;
+use cgmath::Vector3;
 use std::cmp::Ordering;
 use std::fmt::Debug;
 use std::ops::{Add, Mul, Sub};
@@ -103,3 +104,9 @@ impl FromStr for Vector {
         Ok(Vector { x, y, z })
     }
 }
+
+impl From<Vector> for Vector3<f32> {
+    fn from(v: Vector) -> Self {
+        Vector3::new(v.x, v.y, v.z)
+    }
+}