We Keep Coding

Unity3D how to change sprite in SpriteRenderer at runtime with programaticly generated sprite

I'm having this problem with sprites in my Unity3D project. Basiclly I can't change sprite in SpriteRenderer component during runtime. During my research I've only seen solutions that require you to have the sprite pre-loaded, but I can't because it's generated based on the users input image.
So what happens is the user can change the background of the "game" by inputing his own photo from his computer. I get the photo in and everything and I generate a sprite from it, but when I change the base sprite with his sprite, nothing happens. The base sprite is still showing. If I put the background sprite on a panel's Image in canvas, then everything works great, but if I do the same with SpriteRenderer then nothing happens. Here is my code:
public class UploadImage : MonoBehaviour
{
public GameObject background;
public Sprite sp;
[DllImport("__Internal")]
private static extern void ImageUploaderCaptureClick();
public void setTexture(Texture2D texture)
{
sp = Sprite.Create(texture, new Rect(0, 0, texture.width, texture.height), new Vector2(texture.width / 2, texture.height / 2));
background.GetComponent<SpriteRenderer>().sprite = sp;
}
IEnumerator LoadTexture(string url)
{
WWW image = new WWW(url);
yield return image;
Texture2D texture = new Texture2D(1, 1);
image.LoadImageIntoTexture(texture);
Debug.Log("Loaded image size: " + texture.width + "x" + texture.height);
setTexture(texture);
}
void FileSelected(string url)
{
StartCoroutine(LoadTexture(url));
}
public void OnButtonPointerDown()
{
#if UNITY_EDITOR
string path = UnityEditor.EditorUtility.OpenFilePanel("Open image", "", "jpg,png,bmp");
if (!System.String.IsNullOrEmpty(path))
FileSelected("file:///" + path);
#else
ImageUploaderCaptureClick ();
#endif
}
}
I can't have the background on an image in canvas because other game objects lose transparency and if I set the alpha on image too low, then when game objects move, it leaves everything blurry.
Thanks for your help

I think you are setting the sprites pivot wrong when generating the sprite. Your sprite should even be displayed at the moment but its far away from where you expect it to be.
Change your code to something like this:
sp = Sprite.Create(texture, new Rect(0, 0, texture.width, texture.height), new Vector2(0.5f, 0.5f));

Unity - Can I make a mirror in 2D?

I am making a topdown tilebased 2D game. In this game, I want to make 1 of the walls into a mirror, like you can see on this video. Now, I know the game in the trailer is made in RPG Maker, but I want to make my game in Unity 3D.
I have tried to set a camera right next to the mirror, add a RenderTexture on the camera and set that texture on the Sprite, but of course it is not possible to convert a RenderTexture to a Sprite, so this did not end up working.
So my question is, is it possible to create a mirror like in the trailer?

It is possible to get that effect. Just parent the second camera to your character and make it move with your character.
It is possible to convert RenderTexture to a Sprite. First of all, convert the RenderTexture to Texture2D then convert the Texture2D to Sprite with the Sprite.Create function.
It is better to disable the second or mirror camera then use mirrorCam.Render() to manually render it only when you need to. The script below should get you started. Attach it to an empty GameObject then assign the mirror camera and the target SpriteRenderer from the Editor and it should mirror the what the camera is seeing to the SpriteRenderer. Don't forget to plugin RenderTexture to the mirror camera.
public class CameraToSpriteMirror: MonoBehaviour
{
public SpriteRenderer spriteToUpdate;
public Camera mirrorCam;
void Start()
{
StartCoroutine(waitForCam());
}
WaitForEndOfFrame endOfFrame = new WaitForEndOfFrame();
IEnumerator waitForCam()
{
//Will run forever in this while loop
while (true)
{
//Wait for end of frame
yield return endOfFrame;
//Get camera render texture
RenderTexture rendText = RenderTexture.active;
RenderTexture.active = mirrorCam.targetTexture;
//Render that camera
mirrorCam.Render();
//Convert to Texture2D
Texture2D text = renderTextureToTexture2D(mirrorCam.targetTexture);
RenderTexture.active = rendText;
//Convert to Sprite
Sprite sprite = texture2DToSprite(text);
//Apply to SpriteRenderer
spriteToUpdate.sprite = sprite;
}
}
Texture2D renderTextureToTexture2D(RenderTexture rTex)
{
Texture2D tex = new Texture2D(rTex.width, rTex.height, TextureFormat.RGB24, false);
tex.ReadPixels(new Rect(0, 0, rTex.width, rTex.height), 0, 0);
tex.Apply();
return tex;
}
Sprite texture2DToSprite(Texture2D text2D)
{
Sprite sprite = Sprite.Create(text2D, new Rect(0, 0, text2D.width, text2D.height), Vector2.zero);
return sprite;
}
}

You could do it the good old Super Mario 64 way and have the wall be a screen that shows another camera's perspective of another character.
Unity is pretty good at PIP (Picture In Picture) from what I've heard, so may be worth a shot.

Unity 5.6, What is the best approach to make "VR" video player (not 360 video!) [duplicate]

I want to play a stereo 360 degree video in virtual reality in Unity on an Android. So far I have been doing some research and I have two cameras for the right and left eye with each a sphere around them. I also need a custom shader to make the image render on the inside of the sphere. I have the upper half of the image showing on one sphere by setting the y-tiling to 0.5 and the lower half shows on the other sphere with y-tiling 0.5 and y-offset 0.5. With this I can show a 3D 360 degree image already correct. The whole idea is from this tutorial.
Now for video, I need control over the Video speed so it turned out I need the VideoPlayer from the new Unity 5.6 beta. Now my setup so far would require the Video Player to play the video on both spheres with one sphere playing the upper part (one eye) and the other video playing the lower part (other eye).
Here is my problem: I don't know how to get the video Player to play the same video on two different materials (since they have different tiling values). Is there a way to do that?
I got a hint that I could use the same material and achieve the tiling effect via UV, but I don't know how that works and I haven't even got the video player to play the video on two objects using the same material on both of them. I have a screenshot of that here. The Right sphere just has the material videoMaterial. No tiling since I'd have to do that via UV.
Which way to go and how to do it? Am I on the right way here?

Am I on the right way here?
Almost but you are currently using Renderer and Material instead of RenderTexture and Material.
Which way to go and how to do it?
You need to use RenderTexture for this. Basically, you render the Video to RenderTexture then you assign that Texture to the material of both Spheres.
1.Create a RenderTexture and assign it to the VideoPlayer.
2.Create two materials for the spheres.
3.Set VideoPlayer.renderMode to VideoRenderMode.RenderTexture;
4.Set the Texture of both Spheres to the Texture from the RenderTexture
5.Prepare and Play Video.
The code below is doing that exact thing. It should work out of the box. The only thing you need to do is to modify the tiling and offset of each material to your needs.
You should also comment out:
leftSphere = createSphere("LeftEye", new Vector3(-5f, 0f, 0f), new Vector3(4f, 4f, 4f));
rightSphere = createSphere("RightEye", new Vector3(5f, 0f, 0f), new Vector3(4f, 4f, 4f));
then use a Sphere imported from any 3D application. That line of code is only there for testing purposes and it's not a good idea to play video with Unity's sphere because the spheres don't have enough details to make the video smooth.
using UnityEngine;
using UnityEngine.Video;
public class StereoscopicVideoPlayer : MonoBehaviour
{
RenderTexture renderTexture;
Material leftSphereMat;
Material rightSphereMat;
public GameObject leftSphere;
public GameObject rightSphere;
private VideoPlayer videoPlayer;
//Audio
private AudioSource audioSource;
void Start()
{
//Create Render Texture
renderTexture = createRenderTexture();
//Create Left and Right Sphere Materials
leftSphereMat = createMaterial();
rightSphereMat = createMaterial();
//Create the Left and Right Sphere Spheres
leftSphere = createSphere("LeftEye", new Vector3(-5f, 0f, 0f), new Vector3(4f, 4f, 4f));
rightSphere = createSphere("RightEye", new Vector3(5f, 0f, 0f), new Vector3(4f, 4f, 4f));
//Assign material to the Spheres
leftSphere.GetComponent<MeshRenderer>().material = leftSphereMat;
rightSphere.GetComponent<MeshRenderer>().material = rightSphereMat;
//Add VideoPlayer to the GameObject
videoPlayer = gameObject.AddComponent<VideoPlayer>();
//Add AudioSource
audioSource = gameObject.AddComponent<AudioSource>();
//Disable Play on Awake for both Video and Audio
videoPlayer.playOnAwake = false;
audioSource.playOnAwake = false;
// We want to play from url
videoPlayer.source = VideoSource.Url;
videoPlayer.url = "http://www.quirksmode.org/html5/videos/big_buck_bunny.mp4";
//Set Audio Output to AudioSource
videoPlayer.audioOutputMode = VideoAudioOutputMode.AudioSource;
//Assign the Audio from Video to AudioSource to be played
videoPlayer.EnableAudioTrack(0, true);
videoPlayer.SetTargetAudioSource(0, audioSource);
//Set the mode of output to be RenderTexture
videoPlayer.renderMode = VideoRenderMode.RenderTexture;
//Set the RenderTexture to store the images to
videoPlayer.targetTexture = renderTexture;
//Set the Texture of both Spheres to the Texture from the RenderTexture
assignTextureToSphere();
//Prepare Video to prevent Buffering
videoPlayer.Prepare();
//Subscribe to prepareCompleted event
videoPlayer.prepareCompleted += OnVideoPrepared;
}
RenderTexture createRenderTexture()
{
RenderTexture rd = new RenderTexture(1024, 1024, 16, RenderTextureFormat.ARGB32);
rd.Create();
return rd;
}
Material createMaterial()
{
return new Material(Shader.Find("Specular"));
}
void assignTextureToSphere()
{
//Set the Texture of both Spheres to the Texture from the RenderTexture
leftSphereMat.mainTexture = renderTexture;
rightSphereMat.mainTexture = renderTexture;
}
GameObject createSphere(string name, Vector3 spherePos, Vector3 sphereScale)
{
GameObject sphere = GameObject.CreatePrimitive(PrimitiveType.Sphere);
sphere.transform.position = spherePos;
sphere.transform.localScale = sphereScale;
sphere.name = name;
return sphere;
}
void OnVideoPrepared(VideoPlayer source)
{
Debug.Log("Done Preparing Video");
//Play Video
videoPlayer.Play();
//Play Sound
audioSource.Play();
//Change Play Speed
if (videoPlayer.canSetPlaybackSpeed)
{
videoPlayer.playbackSpeed = 1f;
}
}
}
There is also Unity tutorial on how to do this with a special shader but this does not work for me and some other people. I suggest you use the method above until VR support is added to the VideoPlayer API.

Unity - Generated sprite not visible on iOS

currently i'm downloading an image from web via WWW. That works perfect for all targeted platforms excepting iOS.
On iOS the image appears just black.
Here is the code:
public void receiveData(WWW receivedData)
{
image.sprite = Sprite.Create(receivedData.texture, new Rect(new Vector2(0,0), new Vector2(50, 50)), new Vector2(0.5f, 0.5f));
image.color = Color.white;
}
I've been trying around for some time now without any results...
F.E. i tried to change the format of the texture with textureFormat or creating a new Texture2D and changed the pixel. But all results in a black image.
Does anyone have an idea what the matter is?
Best Regards

It is likely black because the WWW is not yet finished downloading on iOS. That code should be in a coroutine function and you have to wait with yield return receivedData. If this does not solve your problem, you have to post the rest of your code but this is likely the problem.
public IEnumerator receiveData(WWW receivedData)
{
//Wait to finish downloading image
yield return receivedData;
//You can now create sprite from the data image
image.sprite = Sprite.Create(receivedData.texture, new Rect(new Vector2(0,0), new Vector2(50, 50)), new Vector2(0.5f, 0.5f));
image.color = Color.white;
}

How large is the image? Is it possible you are exceeding the maximum allowed image size for the hardware?

How can stop my cameras outputting to the same render texture in Unity?

I have two renderer objects (A and B) in my scene connected to two different cameras (green square and red square):
I am using the following script on both render objects to create a render texure on the corresponding camera and then draw this as a texture on the object on each frame:
using UnityEngine;
using System.Collections;
[ExecuteInEditMode]
public class CameraRenderer : MonoBehaviour
{
public Camera Camera;
public Renderer Renderer;
void Start()
{
RenderTexture renderTexture = new RenderTexture (256, 256, 16, RenderTextureFormat.ARGB32);
renderTexture.Create ();
Camera.targetTexture = renderTexture;
}
void Update ()
{
Renderer.sharedMaterial.mainTexture = GetCameraTexture ();
}
Texture2D GetCameraTexture()
{
RenderTexture currentRenderTexture = RenderTexture.active;
RenderTexture.active = Camera.targetTexture;
Camera.Render();
Texture2D texture = new Texture2D(Camera.targetTexture.width, Camera.targetTexture.height);
texture.ReadPixels(new Rect(0, 0, Camera.targetTexture.width, Camera.targetTexture.height), 0, 0);
texture.Apply();
RenderTexture.active = currentRenderTexture;
return texture;
}
}
I am expecting to see two different images on A and B from the different cameras, but I am seeing the same image. I originally was using a render texture that I created in the editor attached to the camera, but though that might be what was causing them to render the same thing so I tried creating a new texture on each object. Sadly this still resulted in the same outcome.
I'm pretty new to unity so I've run out of ideas pretty fast - any suggestions would be great!

I wouldn't advise naming your objects your class names. Anyways I think the renderers are using the same material and they both render the same texture whichever camera gives them last.
Either use Renderer.material to automatically create an new instance of the material, or manually assign different materials to the 2 renderers.

Try,
Renderer.material.mainTexture = GetCameraTexture ();
Instead of,
Renderer.sharedMaterial.mainTexture = GetCameraTexture ();