在UE4中用Houdini Engine设置Houdini Inputs、Houdini Parameters、bake的脚本（部分python代码）

最近的项目是用python脚本把HDA模型导入UE4并在Houdini Inputs中设置几何输入以及模型：

def configure_inputs(self, in_wrapper):
        print('configure_inputs')
        in_wrapper.on_post_instantiation_delegate.remove_callable(self.configure_inputs)

        geo_input = in_wrapper.create_empty_input(unreal.HoudiniPublicAPIGeoInput)
        geo_input.set_input_objects((self.asset, ))
        geo_input.set_object_transform_offset(
            self.asset,
            unreal.Transform(
                (0, 0, 0),
                (0, 0, 0),
                (0, 0, 0),
            )
        )
        in_wrapper.set_input_at_index(0, geo_input)
        geo_input = None

然后还要设置hda的参数：

def on_post_instantiation(self, in_wrapper):
        print('on_post_instantiation')
      in_wrapper.on_post_instantiation_delegate.remove_callable(self.on_post_instantiation)
        # 设置normal_blend_factor和Blendmode的默认值：        
        in_wrapper.set_float_parameter_value('normal_blend_factor', 0.7)
        in_wrapper.set_int_parameter_value('Blendmode', 2)

最后bake出来（默认bake路径是/Game/HoudiniEngine/Bake）：

def on_post_bake(self, in_wrapper, success):
        print('on_post_bake')
        in_wrapper.on_post_bake_delegate.remove_callable(self.on_post_bake)
        print('bake complete ... {}'.format('success' if success else 'failed'))

        in_wrapper.delete_instantiated_asset()
        global _g_wrapper
        _g_wrapper = None