{lyn7251} Add material component example in Python (#4724)

* {lyn7251} Add material component example in Python adds a AZ::Render::EditorMaterialComponent as an example of how to override the default material from the scene building pipeline Signed-off-by: jackalbe <23512001+jackalbe@users.noreply.github.com> * Only set the cube to a gray material Skip loading the asset, instead just set the outPrefabAssetPath for the Prefab system to load Signed-off-by: jackalbe <23512001+jackalbe@users.noreply.github.com> * stablizing the sub-id of procedural prefab groups Signed-off-by: jackalbe <23512001+jackalbe@users.noreply.github.com>
2021-10-18 12:48:38 -05:00
parent 7f10b5d1b9
commit fbedd8126d
3 changed files with 32 additions and 9 deletions
@@ -54,6 +54,30 @@ def get_mesh_node_names(sceneGraph):

    return meshDataList, paths

+def add_material_component(entity_id):
+    # Create an override AZ::Render::EditorMaterialComponent
+    editor_material_component = azlmbr.entity.EntityUtilityBus(
+        azlmbr.bus.Broadcast,
+        "GetOrAddComponentByTypeName",
+        entity_id,
+        "EditorMaterialComponent")
+
+    # this fills out the material asset to a known product AZMaterial asset relative path
+    json_update = json.dumps({
+            "Controller": { "Configuration": { "materials": [
+                {
+                    "Key": {},
+                    "Value": { "MaterialAsset":{
+                        "assetHint": "materials/basic_grey.azmaterial"
+                    }}
+                }]
+            }}
+        });
+    result = azlmbr.entity.EntityUtilityBus(azlmbr.bus.Broadcast, "UpdateComponentForEntity", entity_id, editor_material_component, json_update)
+
+    if not result:
+        raise RuntimeError("UpdateComponentForEntity for editor_material_component failed")
+
 def update_manifest(scene):
    import json
    import uuid, os
@@ -75,6 +99,7 @@ def update_manifest(scene):

    created_entities = []
    previous_entity_id = azlmbr.entity.InvalidEntityId
+    first_mesh = True

    # Loop every mesh node in the scene
    for activeMeshIndex in range(len(mesh_name_list)):
@@ -112,6 +137,11 @@ def update_manifest(scene):
        if not result:
            raise RuntimeError("UpdateComponentForEntity failed for Mesh component")

+        # an example of adding a material component to override the default material
+        if previous_entity_id is not None and first_mesh:
+            first_mesh = False
+            add_material_component(entity_id)
+
        # Get the transform component
        transform_component = azlmbr.entity.EntityUtilityBus(azlmbr.bus.Broadcast, "GetOrAddComponentByTypeName", entity_id, "27F1E1A1-8D9D-4C3B-BD3A-AFB9762449C0")