scene_dof.py

# 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 # Distance to the focus point (in meters)
pipeline_aaa_config.dof_focus_length = target_dof_focus_length # Depth of field (in meters); smaller values result in a narrower focused area.

# 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)