DOF code sample in Python.

scene_dof.py

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+# Toyota 2JZ-GTE Engine model by Serhii Denysenko (CGTrader: serhiidenysenko8256)
+# URL : https://www.cgtrader.com/3d-models/vehicle/part/toyota-2jz-gte-engine-2932b715-2f42-4ecd-93ce-df9507c67ce8
+
+import harfang as hg
+from random import uniform
+
+hg.InputInit()
+hg.WindowSystemInit()
+
+res_x, res_y = 1280, 720
+win = hg.RenderInit('AAA Scene', res_x, res_y, hg.RF_VSync | hg.RF_MSAA4X)
+
+#
+pipeline = hg.CreateForwardPipeline()
+res = hg.PipelineResources()
+
+hg.AddAssetsFolder("resources_compiled")
+
+# load scene
+scene = hg.Scene()
+hg.LoadSceneFromAssets("car_engine/engine.scn", scene, res, hg.GetForwardPipelineInfo())
+
+# AAA pipeline
+pipeline_aaa_config = hg.ForwardPipelineAAAConfig()
+pipeline_aaa = hg.CreateForwardPipelineAAAFromAssets("core", pipeline_aaa_config, hg.BR_Equal, hg.BR_Equal)
+pipeline_aaa_config.sample_count = 1
+target_dof_focus_point = 3.5
+target_dof_focus_length = 2.0
+pipeline_aaa_config.dof_focus_point = target_dof_focus_point
+pipeline_aaa_config.dof_focus_length = target_dof_focus_length
+
+# main loop
+frame = 0
+
+while not hg.ReadKeyboard().Key(hg.K_Escape) and hg.IsWindowOpen(win):
+	dt = hg.TickClock()
+
+	trs = scene.GetNode('engine_master').GetTransform()
+	trs.SetRot(trs.GetRot() + hg.Vec3(0, hg.Deg(15) * hg.time_to_sec_f(dt), 0))
+
+	# change DOF randomly
+	if frame%250 == 0:
+		target_dof_focus_point = uniform(2.5, 3.5)
+		target_dof_focus_length = uniform(0.5, 2.0)
+
+	pipeline_aaa_config.dof_focus_point = hg.Lerp(pipeline_aaa_config.dof_focus_point, target_dof_focus_point, 0.1)
+	pipeline_aaa_config.dof_focus_length = hg.Lerp(pipeline_aaa_config.dof_focus_length, target_dof_focus_length, 0.1)
+
+	scene.Update(dt)
+	hg.SubmitSceneToPipeline(0, scene, hg.IntRect(0, 0, res_x, res_y), True, pipeline, res, pipeline_aaa, pipeline_aaa_config, frame)
+
+	frame = hg.Frame()
+	hg.UpdateWindow(win)
+
+hg.RenderShutdown()
+hg.DestroyWindow(win)