common: integer: Planar64Affine3::from_translation

lib/common/src/integer.rs

@@ -660,6 +660,13 @@ impl Planar64Affine3{
 		Self{matrix3,translation}
 	}
 	#[inline]
+	pub const fn from_translation(translation:Planar64Vec3)->Self{
+		Self{
+			matrix3:mat3::identity(),
+			translation,
+		}
+	}
+	#[inline]
 	pub fn transform_point3(&self,point:Planar64Vec3)->vec3::Vector3<Fixed<2,64>>{
 		self.translation.fix_2()+self.matrix3*point
 	}