feat: render material and render material proxy

src/specklepy/objects/other.py

@@ -0,0 +1,22 @@
+from dataclasses import dataclass
+
+from specklepy.objects.base import Base
+
+
+@dataclass(kw_only=True)
+class RenderMaterial(
+    Base,
+    speckle_type="Objects.Other.RenderMaterial",
+    serialize_ignore={"diffuse", "emissive"},
+):
+    """
+    Minimal physically based material DTO class. Based on references from
+    https://threejs.org/docs/index.html#api/en/materials/MeshStandardMaterial
+    """
+
+    name: str
+    opacity: float = 1.0
+    metalness: float = 0.0
+    roughness: float = 1.0
+    diffuse: int  # ARGB color as int
+    emissive: int = 0  # ARGB color as int, defaults to black

src/specklepy/objects/proxies.py

@@ -3,6 +3,7 @@
 
 from specklepy.objects.base import Base
 from specklepy.objects.interfaces import IHasUnits
+from specklepy.objects.other import RenderMaterial
 
 
 @dataclass(kw_only=True)
@@ -46,3 +47,21 @@ class InstanceDefinitionProxy(
     objects: List[str]
     max_depth: int
     name: str
+
+
+@dataclass(kw_only=True)
+class RenderMaterialProxy(
+    Base,
+    speckle_type="Objects.Other.RenderMaterialProxy",
+    detachable={"objects"},
+):
+    """
+    used to store render material to object relationships in root collections
+
+    Args:
+        objects (list): the list of application ids of objects used by render material
+        value (RenderMaterial): the render material used by the objects
+    """
+
+    objects: List[str]
+    value: RenderMaterial