I'm trying to make a pickup system and I thought it would be cool to do an outline around the item when you're looking at it. The issue I'm facing though is when you're no longer looking at the object I need to disable the outline. I ended up doing an odd solution and would like to get some help improving it.
public class PlayerCamera : MonoBehaviour
{
public Transform playerBody;
public Transform cameraHolder;
public float sensitivity;
public float currentY;
void Update()
{
MoveCamera();
LookingAtObject();
}
Outline objectOutline;
void LookingAtObject()
{
if(Physics.Raycast(cameraHolder.transform.position, cameraHolder.transform.forward, out var hit, Mathf.Infinity))
{
var obj = hit.collider.gameObject;
var outline = obj.GetComponent<Outline>();
if (obj && outline)
{
objectOutline = hit.transform.GetComponent<Outline>();
if (objectOutline)
objectOutline.OutlineWidth = 7;
}
else if (objectOutline)
objectOutline.OutlineWidth = 0;
}
}
}
You can store the outlined object in a variable, and whenever you hit a different outline object or hit nothing, set the outline back to zero.
Outline objectOutline;
void LookingAtObject()
{
if (Physics.Raycast(...))
{
var outline = hit.collider.GetComponent<Outline>();
// Make sure the hit object is not the same one we already outlined
//
if (outline != objectOutline)
{
// Remove the outline from our previously viewed object
//
if (objectOutline != null)
{
objectOutline.OutlineWidth = 0;
}
// Store the new outline object
//
objectOutline = outline;
// Since outline could be null, we need to check null before outlining
//
if (objectOutline != null)
{
objectOutline.OutlineWidth = 7;
}
}
}
// If we have an object we outlined and we didnt hit anything,
// remove the outline and reset the variable
//
else if (objectOutline != null)
{
objectOutline.OutlineWidth = 0;
objectOutline = null;
}
}
You need two events to solve the problem. Input frame and ray output frame. This code detects which raycast event is by recording the previous raycastHit frame and comparing it to the current hit, and sets the outline accordingly.
private RaycastHit lastHit;
void Update()
{
var ray = Camera.main.ScreenPointToRay(Input.mousePosition);
Physics.Raycast(ray, out var hit);
//Physics.Raycast(cameraHolder.transform.position, cameraHolder.transform.forward, out var hit, Mathf.Infinity);
if (hit.transform != lastHit.transform)
{
if (hit.transform) // when raycast Begin
{
var outline = hit.transform.GetComponent<Outline>();
outline.OutlineWidth = 7;
}
else if (lastHit.transform) // when raycast out
{
var outline = lastHit.transform.GetComponent<Outline>();
outline.OutlineWidth = 0;
}
}
lastHit = hit;
}
Hint: I commented on your raycast code for testing. If you want to change the raycast code as before.
Related
I'm trying to move a cube from A to B. The app I'm working on uses Unity / ARKit to detect a plane. On a touch event it places a cube. This currently works as anticipated.
I now want to transform placed cube to a new position, however my cube is stationary. In the code below, I place the cube. Then, in that if statement, I call a method called MoveToB, which should get the GameObject called objectToPlace and transform it's position. I assume this is where the code is going wrong.
void Update()
{
UpdatePlacementPose();
UpdatePlacementIndicator();
if (placementPoseIsValid && Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Began) {
PlaceObject();
Debug.Log("Object Placed"); // This gets called
MoveToB();
}
}
private void MoveToB()
{
objectToPlace.transform.position = new Vector3(100, 100, 100);
Debug.Log("MoveToB Triggered"); // This gets called
}
Is anyone able to point me in the right direction?
Rest of the code...
private void PlaceObject()
{
Instantiate(objectToPlace, placementPose.position, placementPose.rotation);
}
private void UpdatePlacementIndicator()
{
if (placementPoseIsValid) {
placementIndicator.SetActive(true);
placementIndicator.transform.SetPositionAndRotation(placementPose.position, placementPose.rotation);
} else {
placementIndicator.SetActive(false);
}
}
private void UpdatePlacementPose()
{
var screenCentre = Camera.current.ViewportToScreenPoint(new Vector3(0.5f, 0.5f));
var hits = new List<ARRaycastHit>();
arOrigin.Raycast(screenCentre, hits, TrackableType.Planes);
placementPoseIsValid = hits.Count > 0;
if (placementPoseIsValid) {
placementPose = hits[0].pose;
var cameraForward = Camera.current.transform.forward;
var cameraBearing = new Vector3(cameraForward.x, 0, cameraForward.z).normalized;
placementPose.rotation = Quaternion.LookRotation(cameraBearing);
}
}
objectToPlace seems to be a prefab?
If that's teue than
objectToPlace.transform.position = new Vector3(100, 100, 100);
tries to translate that prefab, not the object (clone) you Instantiated in your scene.
Instead you should store the reference of placed object
private GameObject spawnedObject;
private void PlaceObject()
{
spawnedObject = Instantiate(objectToPlace, placementPose.position, placementPose.rotation);
}
And than move it
private void MoveToB()
{
spawnedObject.transform.position = new Vector3(100, 100, 100);
Debug.Log("MoveToB Triggered"); // This gets called
}
I'm trying to dynamically resize particles using a slider, as well as change their colour.
Particles are used to display datapoints in a 3D scatterplot. I'm using this code: https://github.com/PrinzEugn/Scatterplot_Standalone
private ParticleSystem.Particle[] particlePoints;
void Update () {
pointScale = sizeSlider.value;
for (int i = 0; i < pointList.Count; i++) {
Quaternion quaternion = Camera.current.transform.rotation;
Vector3 angles = quaternion.eulerAngles;
// Set point color
particlePoints[i].startColor = new Color(angles.x, angles.y, angles.z, 1.0f);
particlePoints[i].transform.localScale = new Vector3(pointScale, pointScale, pointScale);
}
}
The issue is that there's no transform method for Particles, and changing the "startColour" doesn't change anything.
The API states that "The current size of the particle is calculated procedurally based on this value and the active size modules."
What does that mean, and how can I change the size of the particles ?
Thanks to previous answers I managed to get this working:
In the PlacePrefabPoints method I add every instantiated prefab to a List, and I add a listener to the slider, which looks like this:
void changedPointSize(){
pointScale = sizeSlider.value;
for (int i = 0; i < objects.Count; i++) {
objects[i].transform.localScale = new Vector3(pointScale, pointScale, pointScale);
}
}
Thanks all !
I just had a look at PointRenderer.cs -> CreateParticles and PlacePrefabPoints give a good hint what has to be changed.
So I guess you would simply change the scale values
foreach (var point in particlePoints)
{
Quaternion quaternion = Camera.current.transform.rotation;
Vector3 angles = quaternion.eulerAngles;
// Set point color
point.startColor = new Color(angles.x, angles.y, angles.z, 1.0f);
point.startSize = sizeSlider.value;
}
and than re-call
GetComponent<ParticleSystem>().SetParticles(particlePoints, particlePoints.Length);
it is questionable though if you really would do this in Update. I would rather do it in sizeSlider.onValueChanged to only do it when neccesarry (you could even make a certain treshold that has to be changed before updating the view) but well for the color there might be no other option than doing it in Update but atleast there I would use a Threshold:
privtae ParticleSystem ps;
// I assume you have that referenced in the inspector
public Slider sizeSlider;
// flag to control whether system should be updated
private bool updateSystem;
privtae void Awake()
{
ps = GetComponent<ParticleSystem>();
}
private void OnEnable()
{
// add a listener to onValueChanged
// it is secure to remove it first (even if not there yet)
// this makes sure it is not added twice
sizeSlider.onValueChanged.RemoveListener(OnsliderChanged());
sizeSlider.onValueChanged.AddListener(OnsliderChanged());
}
private void OnDisable()
{
// cleanup listener
sizeSlider.onValueChanged.RemoveListener(OnsliderChanged());
}
private void OnSliderChanged()
{
foreach (var point in particlePoints)
{
point.startSize = sizeSlider.value;
}
// do the same also for the instantiated prefabs
foreach(Transform child in PointHolder.transform)
{
child.localScale = Vecto3.one * sizeSlider.value;
}
updateSystem = true;
}
private Quaternion lastCameraRot;
public float CameraUpdateThreshold;
private void Update()
{
if(Quaternion.Angle(Camera.current.transform.rotation, lastCameraRot) > CameraUpdateThreshold)
{
foreach (var point in particlePoints)
{
Quaternion quaternion = Camera.current.transform.rotation;
Vector3 angles = quaternion.eulerAngles;
// Set point color
point.startColor = new Color(angles.x, angles.y, angles.z, 1.0f);
}
lastCameraRot = Camera.current.transform.rotation;
updateSystem = true;
}
if(!updateSystem) return;
updateSystem = false;
ps.SetParticles(particlePoints, particlePoints.Length);
}
I am looking to show a line in my app from where the model is placed so that the user knows position where the model is kept in real world. When user changes device camera away from model the line gets turned on to show where the model is. Similarly it turns off when model is detected. I have attached images to show from a similar app white dotted lines show the path. Notice how the lines disappear when the model is detected.
LineRenderer lins;
public GameObject Lineprefab;
private GameObject newline;
public Transform startpoint;
public Renderer m_rend1;
bool HitTestWithResultType (ARPoint point, ARHitTestResultType resultTypes)
{
List<ARHitTestResult> hitResults = UnityARSessionNativeInterface.GetARSessionNativeInterface ().HitTest (point, resultTypes);
if (hitResults.Count > 0 && check==true)
{
foreach (var hitResult in hitResults)
{
Debug.Log ("Got hit!");
//obj.Hideplane();
Genplanes.SetActive(false);
if (Select == 0) {
Debug.Log("hit-zero!");
Instantiate(Instaobj[0], ForSelect);
check = false;
}
if (Select == 1) {
Debug.Log("hit-one!");
Instantiate(Instaobj[1], ForSelect);
check = false;
}
if (Select == 2) {
Debug.Log("hit-two!");
Instantiate(Instaobj[2], ForSelect);
check = false;
}
m_HitTransform.position = UnityARMatrixOps.GetPosition (hitResult.worldTransform);
m_HitTransform.rotation = UnityARMatrixOps.GetRotation (hitResult.worldTransform);
Debug.Log (string.Format ("x:{0:0.######} y:{1:0.######} z:{2:0.######}", m_HitTransform.position.x, m_HitTransform.position.y, m_HitTransform.position.z));
obj.StopPlaneTracking();
}
}
return false;
}
private void Start()
{
spawngenerator();
newline.SetActive(false);
m_rend1 = GetComponent<MeshRenderer>();
}
void spawngenerator()
{
GameObject newline = Instantiate(Lineprefab);
lins = newline.GetComponent<LineRenderer>();
}
private void LateUpdate()
{
lins.SetPosition(0, startpoint.position);
lins.SetPosition(1, m_HitTransform.position);
if( m_rend1.isVisible==true)
{
Debug.Log("Render is Visible");
newline.SetActive(false);
}
else if( m_rend1.isVisible==false)
{
newline.SetActive(true);
Debug.Log("It is InVisible");
Debug.Log("Render is InVisible");
}
}
void Update () {
#if UNITY_EDITOR //we will only use this script on the editor side, though there is nothing that would prevent it from working on device
if (Input.GetMouseButtonDown (0)) {
Ray ray = Camera.main.ScreenPointToRay (Input.mousePosition);
RaycastHit hit;
//we'll try to hit one of the plane collider gameobjects that were generated by the plugin
//effectively similar to calling HitTest with ARHitTestResultType.ARHitTestResultTypeExistingPlaneUsingExtent
if (Physics.Raycast (ray, out hit, maxRayDistance, collisionLayer)) {
//we're going to get the position from the contact point
m_HitTransform.position = hit.point;
Debug.Log (string.Format ("x:{0:0.######} y:{1:0.######} z:{2:0.######}", m_HitTransform.position.x, m_HitTransform.position.y, m_HitTransform.position.z));
//and the rotation from the transform of the plane collider
m_HitTransform.rotation = hit.transform.rotation;
}
}
#else
if (Input.touchCount > 0 && m_HitTransform != null )
{
var touch = Input.GetTouch(0);
if ((touch.phase == TouchPhase.Began || touch.phase == TouchPhase.Moved) && !EventSystem.current.IsPointerOverGameObject(touch.fingerId))
{
var screenPosition = Camera.main.ScreenToViewportPoint(touch.position);
ARPoint point = new ARPoint {
x = screenPosition.x,
y = screenPosition.y
};
// prioritize reults types
ARHitTestResultType[] resultTypes = {
//ARHitTestResultType.ARHitTestResultTypeExistingPlaneUsingGeometry,
ARHitTestResultType.ARHitTestResultTypeExistingPlaneUsingExtent,
// if you want to use infinite planes use this:
//ARHitTestResultType.ARHitTestResultTypeExistingPlane,
//ARHitTestResultType.ARHitTestResultTypeEstimatedHorizontalPlane,
//ARHitTestResultType.ARHitTestResultTypeEstimatedVerticalPlane,
//ARHitTestResultType.ARHitTestResultTypeFeaturePoint
};
foreach (ARHitTestResultType resultType in resultTypes)
{
if (HitTestWithResultType (point, resultType))
{
return;
}
}
}
}
#endif
}
.
First, I 'd start with checking if the model is within the bounding box of the camera https://docs.unity3d.com/ScriptReference/Renderer-isVisible.html
if the object is not visible (isVisible == false), create a line renderer from object position to wherever it should end.
The end point could be a camera child place just in front of it, so it looks like it starts from the user to the object.
I am trying to create a simple Infinite Runner game on Unity and ran into a problem. The task is to make a ball spawn on the floor and immediately begin to roll to the left towards the Player. I have tried a number of ways to implement it, but it does not seem to work. Here is my most recent attempt:
public class ObstaclePool : MonoBehaviour {
public GameObject columnPrefab;
public GameObject ballPrefab;
public int obstaclePoolSize = 5;
public float spawnRate = 3f;
private GameObject[] obstacles;
private int currentObstacle = 0;
private Vector2 objectPoolPosition = new Vector2(-15, -25);
private float timeSinceLastSpawned;
private float spawnXPosition;
private bool hasCalled = false;
private int dice;
bool beforeBall = false;
// Use this for initialization
void Start () {
timeSinceLastSpawned = 0f;
SetupObstacles();
}
private void SetupObstacles()
{
obstacles = new GameObject[obstaclePoolSize];
for (int i = 0; i < obstaclePoolSize; i++)
{
dice = Random.Range(1, 3);
if (dice == 1)
{
obstacles[i] = (GameObject)Instantiate(columnPrefab, objectPoolPosition, Quaternion.identity);
}
else if (dice == 2)
{
obstacles[i] = (GameObject)Instantiate(ballPrefab, objectPoolPosition, Quaternion.identity);
}
}
}
// Update is called once per frame
void Update () {
timeSinceLastSpawned += Time.deltaTime;
if (GameControl.instance.gameOver == false && timeSinceLastSpawned >= spawnRate)
{
timeSinceLastSpawned = 0f;
if (hasCalled == false)
{
spawnXPosition = 10f;
hasCalled = true;
}
else
{
spawnXPosition = Random.Range(6f, 10f);
}
if (obstacles[currentObstacle].transform.tag == "Ball")
{
spawnXPosition = Random.Range(9f, 10f);
obstacles[currentObstacle].transform.position = new Vector2(spawnXPosition, -1.84f);
ballPrefab.GetComponent<Rigidbody2D>().AddForce(new Vector2(-100f, 0) * 5);
beforeBall = true;
}
else {
if (beforeBall == true)
{
spawnXPosition = Random.Range(9f, 10f);
beforeBall = false;
}
obstacles[currentObstacle].transform.position = new Vector2(spawnXPosition, -7.08f);
Debug.Log(spawnXPosition);
}
currentObstacle++;
if (currentObstacle >= obstaclePoolSize)
{
currentObstacle = 0;
SetupObstacles();
hasCalled = false;
}
}
}
}
For a quick explanation of my code: I have an array of size 5. It holds the obstacles that I have created. When deciding what to put inside the array, I generated a random number (1 or 2). If it's a 1, I put in a column. If it's a 2, I put in a ball. These obstacles are spawned off-screen. Then, I move them in the actual scene after using random number to determine the X position.
This part in particular is where I try to implement it:
if (obstacles[currentObstacle].transform.tag == "Ball")
{
spawnXPosition = Random.Range(9f, 10f);
obstacles[currentObstacle].transform.position = new Vector2(spawnXPosition, -1.84f);
ballPrefab.GetComponent<Rigidbody2D>().AddForce(new Vector2(-100f, 0) * 5);
beforeBall = true;
}
I may have some remnants of stuff that I have been testing out, so some of the code may seem redundant and messy.
I also tried using Translate and Velocity with no success. I also have a ScrollingObject code and a RepeatingBackground code. I placed the ScrollingObject code in the Ball prefab too. (Also, tried taking it out -> ball rolls to the right). These codes come from the Unity tutorial.
RepeatingBackground:
public class RepeatingBackground : MonoBehaviour {
private BoxCollider2D groundCollider;
private float groundHorizontalLength;
// Use this for initialization
private void Awake () {
groundCollider = GetComponent<BoxCollider2D>();
groundHorizontalLength = groundCollider.size.x;
}
// Update is called once per frame
private void Update () {
if (transform.position.x < -groundHorizontalLength)
{
RepositionBackground();
}
}
private void RepositionBackground()
{
Vector2 groundOffSet = new Vector2(groundHorizontalLength * 2f, 0);
transform.position = (Vector2)transform.position + groundOffSet;
}
}
ScrollingObjects:
public class ScrollingObject : MonoBehaviour {
private Rigidbody2D rb2d;
// Use this for initialization
void Start () {
rb2d = GetComponent<Rigidbody2D>();
rb2d.velocity = new Vector2(GameControl.instance.scrollSpeed, 0);
}
// Update is called once per frame
void Update () {
if (GameControl.instance.gameOver == true)
{
rb2d.velocity = Vector2.zero;
}
}
}
It looks like you simply named the wrong object in your first example.
if (obstacles[currentObstacle].transform.tag == "Ball")
{
spawnXPosition = Random.Range(9f, 10f);
obstacles[currentObstacle].transform.position = new Vector2(spawnXPosition, -1.84f);
ballPrefab.GetComponent<Rigidbody2D>().AddForce(new Vector2(-100f, 0) * 5);
beforeBall = true;
}
Notice how here you added the force to the prefab, not an instantiated version of the prefab.
I played around a bit more and got it to work. I just wrote another script that added force to the object. I still do not understand why my original way did not work though.
I have a target object (cube), and a fake mouse that I created from an object (sphere) to be controlled by gamepad joystick. I want to bring out another object (let say; sphere), when I push the gamepad button and precisely hit the target object (cube).
Before, I have tried with a mouse click, and it succeeds, but when I controlled the fake mouse with a joystick, when I press the button even outside the target (cube) it still brings out another object. Here is the code, if anybody can help me to revise it. Thanks
function Start () {}
function Update () {
if (Input.GetButtonDown ("Fire1"))
{
var Cube = GameObject.FindGameObjectsWithTag ("Cube");
if (Cube[0].GetComponent(MeshRenderer).enabled){
var Circle1 = GameObject.FindGameObjectsWithTag ("Circle1");
Circle1[0].GetComponent(MeshRenderer).enabled = true;
Circle1[0].GetComponent(MeshRenderer).material.color = color.red;
}
}
}
[solved]
Thanks to EmreE and Draco18s for replying my question. I have solved it, I made a collision trigger indeed.
Here is my code after several trials.
if (Input.GetButtonDown ("Fire1") && isCollide)
{
var Cube = GameObject.FindGameObjectsWithTag ("Cube");
if (Cube[0].GetComponent(MeshRenderer).enabled){
var Circle1 = GameObject.FindGameObjectsWithTag ("Circle1");
Circle1[0].GetComponent(MeshRenderer).enabled = true;
Circle1[0].GetComponent(MeshRenderer).material.color = Color.red;
Debug.Log("Muncul");
}
}
function OnTriggerEnter (col : Collider)
{
Debug.Log(isCollide);
if(col.gameObject.name == "Mouse3DSphere")
{
isCollide = true;
}
}
function OnTriggerExit (col : Collider)
{
Debug.Log(isCollide);
if(col.gameObject.name == "Mouse3DSphere")
{
isCollide = false;
}
}