0a_unity_primitives


	156 syllabus site index 3D artists past student work DMA


	A Unity Primitives with VR

Basic VR with Unity primitives SteamVR and HTC Vive

Start Unity Hub (You may need to set up an account)

Make sure you are using Unity 2019.4.11f1
Go to Installs

Go to Projects
Select New, hold down the arrow to select 2019.4.11f1
     Project Name Give your project a name such as A_Primitive_Tutorial.
          This will create a folder with folders inside.
     Location Save to the Desktop or your external drive.
     Select 3D.
     Select CREATE
     Select Allow access to the Firewall pop-up, if it appears.

Make sure the main view is the Scene tab.

Add some primitives
The nice thing about primitives is the collision boundaries are already set up.

Choose GameObject->3D Object->Cube etc. We will use the cube for the floor

Hand moves the view, Move Tool, Rotate Tool, Scale Tool, Rectangle Select,and the 'Move Rotate Scale' Tool.

Select the cube to be used for the floor.
Look at the Inspector tab on the right, Scale should be around 15, .1, 15 x,y,z for the floor cube. (You might need to switch from Services to Inspector.)
Set Position to 0, -.05, 0
You can re-name the floor in the Inspector tab.
Set Cast Shadows to Off in the Inspector.

Add more primitive shapes, place them above the floor.

Add some materials
Select Assets->Create->Material.
Double click the material in Assets below.
Change the Albedo color in the Inspector on the right.
Drag and drop the material onto the primitive while in Scene Mode

Scene View Camera
Use the Alt key left mouse to tumble the camera. Alt right mouse to zoom.

Click an axis such as X in with the XYZ axis to look down the X axis.
You can toggle between Persp, Iso and 2D by clicking on the word below the axis.

F for Frame
Select an object, hit f
The camera will adjust the clipping planes and zoom in on the object.
You may notice some objects gradually disappearing, use f to adjust this.

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Import plugin, Steam VR Camera and Controllers for VR
Choose the Asset Store tab next to the Scene window tab
If the Asset Store says you are offline, sign out and then back in to your Unity account
Type SteamVR in the search bar

Select the SteamVR Plugin by Valve (It is free)
If you have never done this select Download first, then Import

Choose Import in the store window

The Import Unity package window will pop-up
   Scroll down to Longbow
       Uncheck Longbow
   Scroll down to Samples
       Uncheck Samples
Select Import
Choose Accept All if there is a SteamVR error messages about Resizeable Window.

Plugins always import into the Assets folder of your project. You can always copy or delete the SteamVR folders between projects.

Put the main view window back to Scene instead of Asset Store

Select the SteamVR folder from the Project tab
Select the arrow, open InteractionSystem, open Core, select Prefabs
Drag the Player into the Hierarchy tab

Unity_steam_primitives1

SteamVR Camera Settings
Simulation Camera:
Open the arrow next to Player in the Hierarchy
     Open the arrow next to NoSteamVRFallbackObjects
     Select FallbackObjects
          Change Position in Y to 0
          Change Field of View to 90 (default 60)

Grab and drop the Game tab below the Scene tab to create a split view.

Select Player from the Hierarchy to position and rotate the SteamVR camera. You will see the result in the Game tab

Setup the Main Camera to be out of the way
Select the Main Camera from the Hierarchy tab
In the Inspector tab:
     Uncheck Audio Listener
     Change Target Display to Display 2
     Change Target Eye to None in the Inspector tab
(The main camera interferes with SteamVR.)

Try your Project in Sim mode.
Hit the Play button to stop and start your game.

If you are running in Sim mode use w a s d, q r or the arrow buttons to navigate around the scene, and the right mouse to rotate the camera. Left mouse for interactions.

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Throwable Objects
This tool came with SteamVR.
Create a cube, GameObject->3D Object->Cube

Select the cube, use Add Component button located in the inspector at the bottom.
     search for throw select Throwable

Under Interactable Script in the Inspector
     Turn off Highlight on Hover

Hit Play and throw your object, view this in the Game tab.

Add Velocity
Select the cube, use Add Component
     search for vel select VelocityEstimator

Hit Play

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Add a Physics Material to make the objects bouncy
Select the Assets->Create->Physic Material from the menu.
Give the material a name.
Select the Physic Material
Change Bounciness to .4 in the Inspector

Select the object you would like to adjust the bounciness:
     In the Inspector tab, under Collider, assign the Material

Hit Play, try adjusting the bounciness.

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Import a new Skybox
Choose the Asset Store tab next to the Scene window
     Type skybox in the search bar, Select Free Assets
     select Download and Import

Put the main view window back to Scene

Choose Window->Rendering->Lighting Settings
Click the to change the Skybox Material to the skybox you imported.
You can also make your own.

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Solid Color Background if you do not want to use a Skybox
Main Camera:
Choose Window->Rendering->Lighting Settings
Click the next to Skybox Material select None

Scene Window and Unity interface:
Select Edit->Preferences   (Mac: Select Unity->Preferences)
     Select Colors
          Change the Background color

SteamVR Headset Camera:
Open the arrow next to Player in the Hierarchy
     Open the arrow next to SteamVRObjects
     Select VRCamera
     Under Clear Flags change Skybox to Solid Color in the Inspector
     Change the Background color in the Inspector
     Change the Field of View to 90

Simulation Camera:
Open the arrow next to Player in the Hierarchy
     Open the arrow next to NoSteamVRFallbackObjects
     Select FallbackObjects
     Under Clear Flags change Skybox to Solid Color in the Inspector
     Change the Background color in the Inspector

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Fix the shadows
All these settings can slow down performance.
Select Edit->Project Settings
     Select Quality
          Uncheck all Levels except Ultra
     Change Shadow Resolution to Very High Resolution
     If the shadow does not appear when you make a Player
          Decrease Shadow distance to 40     (default 150)

Select your Directional Light
     Lower the Strength to make the shadows lighter, try .5   (default 1)
     Change Bias to .007             this will be more precise (default .05)
     Keep Normal Bias to .4       (default .4)
     Change Near Plane to .1      ( default .2)

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Go to Publish WebGL
Go here to publish your project to webGL.

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EXAMPLES

https://classes.dma.ucla.edu/Fall20/156-1/projects/examples/A_vote_primitives_player

https://classes.dma.ucla.edu/Fall20/156-1/projects/examples/A_primitives_Brian_Pea_player

NOT USED THIS QUARTER

If the Vive VR is not working with the headset
Start Steam
First time use, Steam will ask you to login, you may set up an account or use the department's account: login dmaucla password UCLAdma!
This login seems to hang. It should work OK if you try restarting your Unity project. Worse case reboot the computer.

Make sure the headset and controllers are connected
Try wiggling the Headset.
Try pressing both the round buttons on the controllers together.
Make sure the hand held controllers are charged.
unity_steam_status
Steam Status Utility will look like this if it is ready.

Reset Steam if you don't see all the icons
     Select the down arrow next to SteamVR
     Select Devices->Reboot Vive headset
     There is also a menu to Run Room Setup, this should be done already

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How to transfer Your Project Between Mac and PC
Move the entire project over to the PC or Mac, keep a backup
Open Unity Hub
Under Projects, select ADD
Select your folder
Start the project from the list of Projects
If it asks you to Switch Target upgrade or downgrade you must answer CONFIRM
     (If the versions are close enough it should work.)

A message window from SteamVR may pop up:
It looks like you haven't generated actions for SteamVR Input yet.
Would you like to open the SteamVR Input window?
    Answer Yes

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Make a stand alone Player
Follow this section on a PC
You will be recording the project while looking through a Vive headset on a PC.

Build your project to run on it's own without Unity

File->Save Scene your scene

Select File Build Settings...
Uncheck Scenes/SampleScene if you see it
     Select PC, Mac & Linux stand-alone
     Select Build & Run
          Select your Target Platform such as Windows
          Select Build And Run
               Create a folder outside of your Unity project
               Save to the folder...   wait a second

Alt F4 exits the player on a PC
Command Q exits the player on a Mac
(A stand alone player made on a Mac will not play on a PC.)

OBS
OBS screen capture VR documentation