Procedural Prefabs: Add PhysX mesh group support and example (#6073)

* Auto LOD script setup Signed-off-by: amzn-mike <80125227+amzn-mike@users.noreply.github.com> * Working auto LODs Signed-off-by: amzn-mike <80125227+amzn-mike@users.noreply.github.com> * Correctly selected LODs and added default prefab Signed-off-by: amzn-mike <80125227+amzn-mike@users.noreply.github.com> * Cleanup code Signed-off-by: amzn-mike <80125227+amzn-mike@users.noreply.github.com> * Cleanup code Signed-off-by: amzn-mike <80125227+amzn-mike@users.noreply.github.com> * Add missing legal header, move name cleanup to scene_helpers, add documentation Signed-off-by: amzn-mike <80125227+amzn-mike@users.noreply.github.com> * Add PhysX mesh group support. Updated example script to show usage Signed-off-by: amzn-mike <80125227+amzn-mike@users.noreply.github.com> * Add a physics collider component Signed-off-by: amzn-mike <80125227+amzn-mike@users.noreply.github.com> * Update DefaultOrValue call Signed-off-by: amzn-mike <80125227+amzn-mike@users.noreply.github.com>
2021-12-03 11:23:48 -06:00
parent 8186c268e3
commit 5f41463cd6
2 changed files with 309 additions and 2 deletions
@@ -8,6 +8,7 @@
 import azlmbr.bus
 import azlmbr.math

+from scene_api.scene_data import PrimitiveShape, DecompositionMode
 from scene_helpers import *


@@ -41,6 +42,35 @@ def add_material_component(entity_id):
        raise RuntimeError("UpdateComponentForEntity for editor_material_component failed")


+def add_physx_meshes(scene_manifest: sceneData.SceneManifest, source_file_name: str, mesh_name_list: List, all_node_paths: List[str]):
+    first_mesh = mesh_name_list[0].get_path()
+
+    # Add a Box Primitive PhysX mesh with a comment
+    physx_box = scene_manifest.add_physx_primitive_mesh_group(source_file_name + "_box", PrimitiveShape.BOX, 0.0, None)
+    scene_manifest.physx_mesh_group_add_comment(physx_box, "This is a box primitive")
+    # Select the first mesh, unselect every other node
+    scene_manifest.physx_mesh_group_add_selected_node(physx_box, first_mesh)
+
+    for node in all_node_paths:
+        if node != first_mesh:
+            scene_manifest.physx_mesh_group_add_unselected_node(physx_box, node)
+
+    # Add a Convex Mesh PhysX mesh with a comment
+    convex_mesh = scene_manifest.add_physx_convex_mesh_group(source_file_name + "_convex", 0.08, .0004,
+                                                             True, True, True, True, True, 24, True, "Glass")
+    scene_manifest.physx_mesh_group_add_comment(convex_mesh, "This is a convex mesh")
+    # Select/Unselect nodes using lists
+    all_except_first_mesh = [x for x in all_node_paths if x != first_mesh]
+    scene_manifest.physx_mesh_group_add_selected_unselected_nodes(convex_mesh, [first_mesh], all_except_first_mesh)
+
+    # Configure mesh decomposition for this mesh
+    scene_manifest.physx_mesh_group_decompose_meshes(convex_mesh, 512, 32, .002, 100100, DecompositionMode.TETRAHEDRON,
+                                                     0.06, 0.055, 0.00015, 3, 3, True, False)
+
+    # Add a Triangle mesh
+    triangle = scene_manifest.add_physx_triangle_mesh_group(source_file_name + "_triangle", False, True, True, True, True, True)
+    scene_manifest.physx_mesh_group_add_selected_unselected_nodes(triangle, [first_mesh], all_except_first_mesh)
+
 def update_manifest(scene):
    import uuid, os
    import azlmbr.scene.graph
@@ -62,6 +92,8 @@ def update_manifest(scene):
    previous_entity_id = azlmbr.entity.InvalidEntityId
    first_mesh = True

+    add_physx_meshes(scene_manifest, source_filename_only, mesh_name_list, all_node_paths)
+
    # Loop every mesh node in the scene
    for activeMeshIndex in range(len(mesh_name_list)):
        mesh_name = mesh_name_list[activeMeshIndex]
@@ -106,6 +138,26 @@ def update_manifest(scene):
        if not result:
            raise RuntimeError("UpdateComponentForEntity failed for Mesh component")

+        # Add a physics component referencing the triangle mesh we made for the first node
+        if previous_entity_id is None:
+            physx_mesh_component = azlmbr.entity.EntityUtilityBus(azlmbr.bus.Broadcast, "GetOrAddComponentByTypeName",
+                                      entity_id, "{FD429282-A075-4966-857F-D0BBF186CFE6} EditorColliderComponent")
+
+            json_update = json.dumps({
+                "ShapeConfiguration": {
+                    "PhysicsAsset": {
+                        "Asset": {
+                            "assetHint": os.path.join(source_relative_path, source_filename_only + "_triangle.pxmesh")
+                        }
+                    }
+                }
+            })
+
+            result = azlmbr.entity.EntityUtilityBus(azlmbr.bus.Broadcast, "UpdateComponentForEntity", entity_id, physx_mesh_component, json_update)
+
+            if not result:
+                raise RuntimeError("UpdateComponentForEntity failed for PhysX 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