Tutorials update for HARFANG v3.0.0:

* Fixed the spatialized sound Lua tutorial. * Updated the tutorials impacted by the SetViewPerspective or SetView2D API change. * Updated the VR tutorial to explicitely create a SceneForwardPipelinePassViewId. * Added a new tutorial to demonstrate the Python/Lua communication. * Updated the core shaders.
harfang3d · Oct 13, 2021 · 3038f18 · 3038f18
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diff --git a/README.md b/README.md
@@ -1,9 +1,26 @@
-# HARFANG® 2.0 Tutorials
+# HARFANG® 3.0 Tutorials
 
 These **tutorials** demonstrate the usage of the HARFANG 2.0 API in **Python** and **Lua**.
-If you want to know more about HARFANG, please visit the [official website](https://www.harfang3d.com).
 
-To **run the tutorials**, please follow the **instructions** here : https://www.harfang3d.com/docs/2.0.111/man.quickstart/
+To run the tutorials:
+
+1. Download or clone this repository to your computer _(eg. in `d:/tutorials-hg2`)_.
+2. Download _assetc_ for your platform from [here](https://harfang3d.com/releases) to compile the tutorial resources.
+3. Drag and drop the tutorial resources folder on the assetc executable **-OR-** execute assetc passing it the path to the tutorial resources folder _(eg. `assetc d:/tutorials-hg2/resources`)_.
+
+![assetc drag & drop](https://github.com/harfang3d/image-storage/raw/main/tutorials/assetc.gif)
+
+After the compilation process finishes, you will see a `resources_compiled` folder next to the tutorials resources folder.
+
+You can now execute the tutorials from the folder you unzipped them to.
+
+```bash
+D:\tutorials-hg2>python draw_lines.py
+```
+
+Alternatively, you can open the tutorial folder using [Visual Studio Code](https://code.visualstudio.com/) and use the provided debug targets to run the tutorials.
+
+**If you want to know more about HARFANG**, please visit the [official website](https://www.harfang3d.com).
 
 ## Screenshots
 * AAA Rendering Pipeline
@@ -34,4 +51,4 @@ To **run the tutorials**, please follow the **instructions** here : https://www.
 ![Lights priority](screenshots/scene_light_priority.png)
 
 * Dear ImGui edition
-![Dear ImGui edition](screenshots/imgui_edit.png)
+![Dear ImGui edition](screenshots/imgui_edit.png)
diff --git a/audio_play_sound_spatialized.lua b/audio_play_sound_spatialized.lua
@@ -3,7 +3,7 @@
 hg = require("harfang")
 
 hg.InputInit()
-hg.WindowSystemInit()
+hg.AudioInit()
 
 hg.AddAssetsFolder("resources_compiled")
 

diff --git a/draw_model_no_pipeline.lua b/draw_model_no_pipeline.lua
@@ -24,7 +24,7 @@ while not hg.ReadKeyboard():Key(hg.K_Escape) do
 	angle = angle + hg.time_to_sec_f(dt)
 
 	viewpoint = hg.TranslationMat4(hg.Vec3(0, 1, -3))
-	hg.SetViewPerspective(0, res_x, res_y, viewpoint)
+	hg.SetViewPerspective(0, 0, 0, res_x, res_y, viewpoint)
 
 	hg.DrawModel(0, cube_mdl, shader, {}, {}, hg.TransformationMat4(hg.Vec3(0, 1, 0), hg.Vec3(angle, angle, angle)))
 	hg.DrawModel(0, ground_mdl, shader, {}, {}, hg.TranslationMat4(hg.Vec3(0, 0, 0)))

diff --git a/draw_models_no_pipeline.py b/draw_models_no_pipeline.py
@@ -24,7 +24,7 @@
 	angle = angle + hg.time_to_sec_f(dt)
 
 	viewpoint = hg.TranslationMat4(hg.Vec3(0, 1, -3))
-	hg.SetViewPerspective(0, res_x, res_y, viewpoint)
+	hg.SetViewPerspective(0, 0, 0, res_x, res_y, viewpoint)
 
 	hg.DrawModel(0, cube_mdl, shader, [], [], hg.TransformationMat4(hg.Vec3(0, 1, 0), hg.Vec3(angle, angle, angle)))
 	hg.DrawModel(0, ground_mdl, shader, [], [], hg.TranslationMat4(hg.Vec3(0, 0, 0)))

diff --git a/draw_text.lua b/draw_text.lua
@@ -18,7 +18,7 @@ text_render_state = hg.ComputeRenderState(hg.BM_Alpha, hg.DT_Always, hg.FC_Disab
 
 -- main loop
 while not hg.ReadKeyboard('default'):Key(hg.K_Escape) do
-	hg.SetView2D(0, res_x, res_y, -1, 1, hg.CF_Color | hg.CF_Depth, hg.ColorI(32, 32, 32), 0, 1)
+	hg.SetView2D(0, 0, 0, res_x, res_y, -1, 1, hg.CF_Color | hg.CF_Depth, hg.ColorI(32, 32, 32), 0, 1)
 
 	hg.DrawText(0, font, 'Hello world!', font_prg, 'u_tex', 0, hg.Mat4.Identity, hg.Vec3(res_x / 2, res_y / 2, 0), hg.DTHA_Center, hg.DTVA_Center, text_uniform_values, {}, text_render_state)
 

diff --git a/draw_text.py b/draw_text.py
@@ -18,7 +18,7 @@
 
 # main loop
 while not hg.ReadKeyboard('default').Key(hg.K_Escape):
-	hg.SetView2D(0, res_x, res_y, -1, 1, hg.CF_Color | hg.CF_Depth, hg.ColorI(32, 32, 32), 0, 1)
+	hg.SetView2D(0, 0, 0, res_x, res_y, -1, 1, hg.CF_Color | hg.CF_Depth, hg.ColorI(32, 32, 32), 0, 1)
 
 	hg.DrawText(0, font, 'Hello world!', font_prg, 'u_tex', 0, hg.Mat4.Identity, hg.Vec3(res_x / 2, res_y / 2, 0), hg.DTHA_Center, hg.DTVA_Center, text_uniform_values, [], text_render_state)
 

diff --git a/draw_text_over_models.lua b/draw_text_over_models.lua
@@ -33,13 +33,13 @@ while not hg.ReadKeyboard():Key(hg.K_Escape) do
 
 	-- 3D view
 	viewpoint = hg.TranslationMat4(hg.Vec3(0, 1, -3))
-	hg.SetViewPerspective(0, res_x, res_y, viewpoint, 0.01, 5000)
+	hg.SetViewPerspective(0, 0, 0, res_x, res_y, viewpoint, 0.01, 5000)
 
 	hg.DrawModel(0, cube_mdl, shader, {}, {}, hg.TransformationMat4(hg.Vec3(0, 1, 0), hg.Vec3(angle, angle, angle)))
 	hg.DrawModel(0, ground_mdl, shader, {}, {}, hg.TranslationMat4(hg.Vec3(0, 0, 0)))
 
 	-- 2D view, note that only the depth buffer is cleared
-	hg.SetView2D(1, res_x, res_y, -1, 1, hg.CF_Depth, hg.ColorI(32, 32, 32), 1, 0)
+	hg.SetView2D(1, 0, 0, res_x, res_y, -1, 1, hg.CF_Depth, hg.ColorI(32, 32, 32), 1, 0)
 
 	hg.DrawText(1, font, 'Hello world!', font_prg, 'u_tex', 0, hg.Mat4.Identity, hg.Vec3(res_x / 2, res_y / 2, 0), hg.DTHA_Center, hg.DTVA_Center, text_uniform_values, {}, text_render_state)
 

diff --git a/draw_text_over_models.py b/draw_text_over_models.py
@@ -33,13 +33,13 @@
 
 	# 3D view
 	viewpoint = hg.TranslationMat4(hg.Vec3(0, 1, -3))
-	hg.SetViewPerspective(0, res_x, res_y, viewpoint, 0.01, 5000)
+	hg.SetViewPerspective(0, 0, 0, res_x, res_y, viewpoint, 0.01, 5000)
 
 	hg.DrawModel(0, cube_mdl, shader, [], [], hg.TransformationMat4(hg.Vec3(0, 1, 0), hg.Vec3(angle, angle, angle)))
 	hg.DrawModel(0, ground_mdl, shader, [], [], hg.TranslationMat4(hg.Vec3(0, 0, 0)))
 
 	# 2D view, note that only the depth buffer is cleared
-	hg.SetView2D(1, res_x, res_y, -1, 1, hg.CF_Depth, hg.ColorI(32, 32, 32), 1, 0)
+	hg.SetView2D(1, 0, 0, res_x, res_y, -1, 1, hg.CF_Depth, hg.ColorI(32, 32, 32), 1, 0)
 
 	hg.DrawText(1, font, 'Hello world!', font_prg, 'u_tex', 0, hg.Mat4.Identity, hg.Vec3(res_x / 2, res_y / 2, 0), hg.DTHA_Center, hg.DTVA_Center, text_uniform_values, [], text_render_state)
 

diff --git a/game_mouse_flight.lua b/game_mouse_flight.lua
@@ -112,7 +112,7 @@ while not keyboard:Down(hg.K_Escape) do
 	view_id, passes_id = hg.SubmitSceneToPipeline(view_id, scene, hg.IntRect(0, 0, res_x, res_y), true, pipeline, res)
 
 	-- draw 2D GUI
-	hg.SetView2D(view_id, res_x, res_y, -1, 1, hg.CF_Depth, hg.Color.Black, 1, 0, true)
+	hg.SetView2D(view_id, 0, 0, res_x, res_y, -1, 1, hg.CF_Depth, hg.Color.Black, 1, 0, true)
 	draw_circle(view_id, hg.Vec3(mouse_x, mouse_y, 0), 20, hg.Color.White)  -- display mouse cursor
 
 	-- end of frame

diff --git a/game_mouse_flight.py b/game_mouse_flight.py
@@ -114,7 +114,7 @@ def update_chase_camera(target_pos):
 	view_id, passes_id = hg.SubmitSceneToPipeline(view_id, scene, hg.IntRect(0, 0, int(res_x), int(res_y)), True, pipeline, res)
 
 	# draw 2D GUI
-	hg.SetView2D(view_id, res_x, res_y, -1, 1, hg.CF_Depth, hg.Color.Black, 1, 0, True)
+	hg.SetView2D(view_id, 0, 0, res_x, res_y, -1, 1, hg.CF_Depth, hg.Color.Black, 1, 0, True)
 	draw_circle(view_id, hg.Vec3(mouse_x, mouse_y, 0), 20, hg.Color.White)  # display mouse cursor
 
 	# end of frame

diff --git a/imgui_basic.lua b/imgui_basic.lua
@@ -25,7 +25,7 @@ while not hg.ReadKeyboard():Key(hg.K_Escape) do
 	end
 	hg.ImGuiEnd()
 
-	hg.SetView2D(0, res_x, res_y, -1, 1, hg.CF_Color | hg.CF_Depth, hg.Color.Black, 1, 0)
+	hg.SetView2D(0, 0, 0, res_x, res_y, -1, 1, hg.CF_Color | hg.CF_Depth, hg.Color.Black, 1, 0)
 	hg.ImGuiEndFrame(0)
 
 	hg.Frame()

diff --git a/imgui_basic.py b/imgui_basic.py
@@ -24,7 +24,7 @@
 		hg.ImGuiText('Hello World!')
 	hg.ImGuiEnd()
 
-	hg.SetView2D(0, res_x, res_y, -1, 1, hg.CF_Color | hg.CF_Depth, hg.Color.Black, 1, 0)
+	hg.SetView2D(0, 0, 0, res_x, res_y, -1, 1, hg.CF_Color | hg.CF_Depth, hg.Color.Black, 1, 0)
 	hg.ImGuiEndFrame(0)
 
 	hg.Frame()

diff --git a/imgui_edit.lua b/imgui_edit.lua
@@ -58,7 +58,7 @@ while not hg.ReadKeyboard():Key(hg.K_Escape) do
 	end
 	hg.ImGuiEnd()
 
-	hg.SetView2D(imgui_output_view, res_x, res_y, -1, 0, hg.CF_Color | hg.CF_Depth, imgui_view_clear_color, 1, 0)
+	hg.SetView2D(imgui_output_view, 0, 0, res_x, res_y, -1, 0, hg.CF_Color | hg.CF_Depth, imgui_view_clear_color, 1, 0)
 	hg.ImGuiEndFrame(imgui_output_view)
 
 	-- rendering frame

diff --git a/imgui_edit.py b/imgui_edit.py
@@ -55,7 +55,7 @@
 
 	hg.ImGuiEnd()
 
-	hg.SetView2D(imgui_output_view, res_x, res_y, -1, 0, hg.CF_Color | hg.CF_Depth, imgui_view_clear_color, 1, 0)
+	hg.SetView2D(imgui_output_view, 0, 0, res_x, res_y, -1, 0, hg.CF_Color | hg.CF_Depth, imgui_view_clear_color, 1, 0)
 	hg.ImGuiEndFrame(imgui_output_view)
 
 	# rendering frame

diff --git a/imgui_mouse_capture.lua b/imgui_mouse_capture.lua
@@ -35,7 +35,7 @@ while not hg.ReadKeyboard():Key(hg.K_Escape) do
 		end
 	end
 
-	hg.SetView2D(0, res_x, res_y, -1, 0, hg.CF_Color | hg.CF_Depth, clear_color, 1, 0)
+	hg.SetView2D(0, 0, 0, res_x, res_y, -1, 0, hg.CF_Color | hg.CF_Depth, clear_color, 1, 0)
 
 	hg.ImGuiSetNextWindowPosCenter(hg.ImGuiCond_Once)
 	hg.ImGuiSetNextWindowSize(hg.Vec2(700, 96), hg.ImGuiCond_Once)

diff --git a/imgui_mouse_capture.py b/imgui_mouse_capture.py
@@ -30,7 +30,7 @@
 	else:
 		clear_color = hg.Color.Red if mouse.Down(hg.MB_0) else hg.Color.Black
 
-	hg.SetView2D(0, res_x, res_y, -1, 0, hg.CF_Color | hg.CF_Depth, clear_color, 1, 0)
+	hg.SetView2D(0, 0, 0, res_x, res_y, -1, 0, hg.CF_Color | hg.CF_Depth, clear_color, 1, 0)
 
 	hg.ImGuiSetNextWindowPosCenter(hg.ImGuiCond_Once)
 	hg.ImGuiSetNextWindowSize(hg.Vec2(700, 96), hg.ImGuiCond_Once)

diff --git a/physics_impulse.lua b/physics_impulse.lua
@@ -38,9 +38,9 @@ ground_node = hg.CreatePhysicCube(scene, hg.Vec3(100, 0.02, 100), hg.Translation
 clocks = hg.SceneClocks()
 
 -- scene physics
-physics = hg.SceneNewtonPhysics()
+physics = hg.SceneBullet3Physics()
 physics:SceneCreatePhysicsFromAssets(scene)
-physics_step = hg.time_from_sec_f(1 / 30)
+physics_step = hg.time_from_sec_f(1 / 60)
 
 -- main loop
 keyboard = hg.Keyboard()
@@ -51,15 +51,17 @@ while not keyboard:Down(hg.K_Escape) do
 	dt = hg.TickClock()
 
 	if keyboard:Pressed(hg.K_I) then
+		physics:NodeWake(cube_node)
 		world_pos = hg.GetT(cube_node:GetTransform():GetWorld())
-		physics:NodeAddImpulse(cube_node, hg.Vec3(0, 2, 0), world_pos, physics_step)
+		physics:NodeAddImpulse(cube_node, hg.Vec3(0, 8, 0), world_pos)
 	end
 	if keyboard:Pressed(hg.K_F) then
+		physics:NodeWake(cube_node)
 		world_pos = hg.GetT(cube_node:GetTransform():GetWorld())
-		physics:NodeAddForce(cube_node, hg.Vec3(0, 2, 0), world_pos)
+		physics:NodeAddForce(cube_node, hg.Vec3(0, 8, 0), world_pos)
 	end
 
-	hg.SceneUpdateSystems(scene, clocks, dt, physics, physics_step, 1000)
+	hg.SceneUpdateSystems(scene, clocks, dt, physics, physics_step, 3)
 	hg.SubmitSceneToPipeline(0, scene, hg.IntRect(0, 0, res_x, res_y), true, pipeline, res)
 
 	hg.Frame()
@@ -70,4 +72,4 @@ hg.RenderShutdown()
 hg.DestroyWindow(win)
 
 hg.WindowSystemShutdown()
-hg.InputShutdown()
+hg.InputShutdown()
diff --git a/physics_impulse.py b/physics_impulse.py
@@ -6,7 +6,7 @@
 hg.WindowSystemInit()
 
 res_x, res_y = 1280, 720
-win = hg.RenderInit('Harfang - Physics Impulse', res_x, res_y, hg.RF_VSync | hg.RF_MSAA4X)
+win = hg.RenderInit('Harfang - Physics Force/Impulse (Press space to alternate)', res_x, res_y, hg.RF_VSync | hg.RF_MSAA4X)
 
 pipeline = hg.CreateForwardPipeline()
 res = hg.PipelineResources()
@@ -32,32 +32,50 @@
 
 lgt = hg.CreateLinearLight(scene, hg.TransformationMat4(hg.Vec3(0, 0, 0), hg.Vec3(hg.Deg(30), hg.Deg(59), 0)), hg.Color(1, 1, 1), hg.Color(1, 1, 1), 10, hg.LST_Map, 0.002, hg.Vec4(2, 4, 10, 16))
 
-cube_node = hg.CreatePhysicCube(scene, hg.Vec3(1, 1, 1), hg.TranslationMat4(hg.Vec3(0, 2.5, 0)), cube_ref, [mat], 2)
+cube_node = hg.CreatePhysicCube(scene, hg.Vec3(1, 1, 1), hg.TranslationMat4(hg.Vec3(0, 1.5, 0)), cube_ref, [mat], 2)
 ground_node = hg.CreatePhysicCube(scene, hg.Vec3(100, 0.02, 100), hg.TranslationMat4(hg.Vec3(0, -0.005, 0)), ground_ref, [mat], 0)
 
 clocks = hg.SceneClocks()
 
 # scene physics
-physics = hg.SceneNewtonPhysics()
+physics = hg.SceneBullet3Physics()
 physics.SceneCreatePhysicsFromAssets(scene)
-physics_step = hg.time_from_sec_f(1 / 30)
+physics_step = hg.time_from_sec_f(1 / 60)
 
 # main loop
 keyboard = hg.Keyboard()
 
+use_force = True
+
 while not keyboard.Down(hg.K_Escape):
 	keyboard.Update()
 
 	dt = hg.TickClock()
 
-	if keyboard.Pressed(hg.K_I):
-		world_pos = hg.GetT(cube_node.GetTransform().GetWorld())
-		physics.NodeAddImpulse(cube_node, hg.Vec3(0, 2, 0), world_pos, physics_step)
-	if keyboard.Pressed(hg.K_F):
-		world_pos = hg.GetT(cube_node.GetTransform().GetWorld())
-		physics.NodeAddForce(cube_node, hg.Vec3(0, 2, 0), world_pos)
+	if keyboard.Pressed(hg.K_Space):
+		use_force = not use_force
+
+	world_pos = hg.GetT(cube_node.GetTransform().GetWorld())
+	dist_to_ground = world_pos.y - 0.5
+
+	if dist_to_ground < 1.0:
+		k = -(dist_to_ground - 1.0)
+
+		if use_force:
+			F = hg.Vec3(0, 1, 0) * k * 80  # apply a force inversely proportional to the distance to the ground
+			physics.NodeAddForce(cube_node, F, world_pos)
+		else:
+			stiffness = 10
+
+			cur_velocity = physics.NodeGetLinearVelocity(cube_node)
+			tgt_velocity = hg.Vec3(0, 1, 0) * k * stiffness  # compute a velocity that brings us to 1 meter above the ground
+
+			I = tgt_velocity - cur_velocity  # an impulse is an instantaneous change in velocity
+			physics.NodeAddImpulse(cube_node, I, world_pos)
+
+	physics.NodeWake(cube_node)
 
-	hg.SceneUpdateSystems(scene, clocks, dt, physics, physics_step, 1000)
+	hg.SceneUpdateSystems(scene, clocks, dt, physics, physics_step, 3)
 	hg.SubmitSceneToPipeline(0, scene, hg.IntRect(0, 0, res_x, res_y), True, pipeline, res)
 
 	hg.Frame()
@@ -67,4 +85,4 @@
 hg.DestroyWindow(win)
 
 hg.WindowSystemShutdown()
-hg.InputShutdown()
+hg.InputShutdown()
diff --git a/physics_kapla.lua b/physics_kapla.lua
@@ -89,9 +89,9 @@ cam_pos = hg.Vec3(28.3, 31.8, 26.9)
 cam_rot = hg.Vec3(0.6, -2.38, 0)
 
 -- setup physics
-physics = hg.SceneNewtonPhysics()
+physics = hg.SceneBullet3Physics()
 physics:SceneCreatePhysicsFromAssets(scene)
-physics_step = hg.time_from_sec_f(1 / 50)
+physics_step = hg.time_from_sec_f(1 / 60)
 
 -- main loop
 while not keyboard:Down(hg.K_Escape) do
@@ -114,7 +114,7 @@ while not keyboard:Down(hg.K_Escape) do
 	if keyboard:Pressed(hg.K_Space) then
 		node = hg.CreatePhysicSphere(scene, 0.5, hg.TranslationMat4(cam_pos), sphere_ref, {mat_spheres}, 0.5)
 		physics:NodeCreatePhysicsFromAssets(node)
-		physics:NodeAddImpulse(node, hg.GetZ(cam:GetTransform():GetWorld()) * 50.0, cam_pos, physics_step)
+		physics:NodeAddImpulse(node, hg.GetZ(cam:GetTransform():GetWorld()) * 25.0, cam_pos)
 	end
 
 	hg.SceneUpdateSystems(scene, clocks, dt, physics, physics_step, 1)

diff --git a/physics_kapla.py b/physics_kapla.py
@@ -87,9 +87,9 @@ def fill_ring(r, ring_y, size, r_adjust, y_off):
 cam_rot = hg.Vec3(0.6, -2.38, 0)
 
 # setup physics
-physics = hg.SceneNewtonPhysics()
+physics = hg.SceneBullet3Physics()
 physics.SceneCreatePhysicsFromAssets(scene)
-physics_step = hg.time_from_sec_f(1 / 50)
+physics_step = hg.time_from_sec_f(1 / 60)
 
 # main loop
 while not keyboard.Down(hg.K_Escape):
@@ -106,7 +106,7 @@ def fill_ring(r, ring_y, size, r_adjust, y_off):
 	if keyboard.Pressed(hg.K_Space):
 		node = hg.CreatePhysicSphere(scene, 0.5, hg.TranslationMat4(cam_pos), sphere_ref, [mat_spheres], 0.5)
 		physics.NodeCreatePhysicsFromAssets(node)
-		physics.NodeAddImpulse(node, hg.GetZ(cam.GetTransform().GetWorld()) * 50.0, cam_pos, physics_step)
+		physics.NodeAddImpulse(node, hg.GetZ(cam.GetTransform().GetWorld()) * 25.0, cam_pos)
 
 	hg.SceneUpdateSystems(scene, clocks, dt, physics, physics_step, 1)
 	hg.SubmitSceneToPipeline(0, scene, hg.IntRect(0, 0, res_x, res_y), True, pipeline, res)

diff --git a/physics_manual_setup.lua b/physics_manual_setup.lua
@@ -50,7 +50,7 @@ cube_node:SetRigidBody(rb)
 cube_node:SetCollision(0, collision)
 
 -- scene physics
-physics = hg.SceneNewtonPhysics()
+physics = hg.SceneBullet3Physics()
 physics:SceneCreatePhysicsFromAssets(scene)
 
 -- main loop

diff --git a/physics_manual_setup.py b/physics_manual_setup.py
@@ -50,7 +50,7 @@
 cube_node.SetCollision(0, collision)
 
 # scene physics
-physics = hg.SceneNewtonPhysics()
+physics = hg.SceneBullet3Physics()
 physics.SceneCreatePhysicsFromAssets(scene)
 
 # main loop

diff --git a/physics_overrides_matrix.lua b/physics_overrides_matrix.lua
@@ -41,7 +41,7 @@ ground_node = hg.CreatePhysicCube(scene, hg.Vec3(100, 0.02, 100), hg.Translation
 clocks = hg.SceneClocks()
 
 -- scene physics
-physics = hg.SceneNewtonPhysics()
+physics = hg.SceneBullet3Physics()
 physics:SceneCreatePhysicsFromAssets(scene)
 
 -- main loop

diff --git a/physics_overrides_matrix.py b/physics_overrides_matrix.py
@@ -41,7 +41,7 @@
 clocks = hg.SceneClocks()
 
 # scene physics
-physics = hg.SceneNewtonPhysics()
+physics = hg.SceneBullet3Physics()
 physics.SceneCreatePhysicsFromAssets(scene)
 
 # main loop