support arbitrary number of cameras

Assets/Color Capture Material.mat

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Assets/Depth Capture Material 1.mat

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Assets/RT3script.cs

@@ -8,12 +8,16 @@ using System.IO;
 
 public class RT3script : MonoBehaviour
 {
-    public RenderTexture colorImage, depthImage, colorImage2, depthImage2;
+
     // public string outputRTMP = "rtmp://localhost/live/HoloPipeline";
     public string ingestRTMP = "rtmp://ingest.vrcdn.live/live";
     public string streamKey = "";
     public string mp4name = "my_movie_depth_ffmpeg.mp4";
 
+    public Camera[] cameraList;
+    private Camera[] depthCameraList;
+
+    private RenderTexture[] colorImages, depthImages;
     public Material debugMaterial;
 
     public Texture2D outputImage;
@@ -23,53 +27,39 @@ public class RT3script : MonoBehaviour
 
     private Process ffmpegProcess;
     private string outputMP4;
-    private int metadataWidth = 256;
+    private int metadataHeight = 256;
 
     // Start is called before the first frame update
     void Start()
     {
-        // Define file path for movie
+        colorImages = new RenderTexture[cameraList.Length];
-        outputMP4 = Path.Combine(Path.GetTempPath(), mp4name);
+        depthImages = new RenderTexture[cameraList.Length];
-        UnityEngine.Debug.Log(outputMP4);
+        depthCameraList = new Camera[cameraList.Length];
-        if (File.Exists(outputMP4)) {
+
-            File.Delete(outputMP4);
+
+        // colorImage = new RenderTexture(256,256,16,RenderTextureFormat.ARGB32);
+        // colorImage2 = new RenderTexture(256,256,16,RenderTextureFormat.ARGB32);
+        // depthImage = new RenderTexture(256,256,16,RenderTextureFormat.ARGB32);
+        // depthImage2 = new RenderTexture(256,256,16,RenderTextureFormat.ARGB32);
+        outputImage = new Texture2D((256*cameraList.Length), 512 + metadataHeight, TextureFormat.RGB24, false);
+        outputImage.filterMode = FilterMode.Point;
+
+        for (int i = 0; i < cameraList.Length; i++) {
+            colorImages[i] = new RenderTexture(256,256,16,RenderTextureFormat.ARGB32);
+            cameraList[i].targetTexture = colorImages[i];
+
+            Camera depthCamera =  new GameObject().AddComponent<Camera>();
+            depthCamera.CopyFrom(cameraList[i]);
+            depthCamera.clearFlags = CameraClearFlags.SolidColor;
+            depthCamera.backgroundColor = Color.black;
+            depthCamera.SetReplacementShader(Shader.Find("Custom/DepthOnly"), "");
+
+            depthCameraList[i] = depthCamera;
+            depthImages[i] = new RenderTexture(256,256,16,RenderTextureFormat.ARGB32);
+            depthCameraList[i].targetTexture = depthImages[i];
         }
 
 
-
-        colorImage = new RenderTexture(256,256,16,RenderTextureFormat.ARGB32);
-        colorImage2 = new RenderTexture(256,256,16,RenderTextureFormat.ARGB32);
-        depthImage = new RenderTexture(256,256,16,RenderTextureFormat.ARGB32);
-        depthImage2 = new RenderTexture(256,256,16,RenderTextureFormat.ARGB32);
-        outputImage = new Texture2D(metadataWidth + 512, 512, TextureFormat.RGB24, false);
-        // outputImage = new Texture2D(512,512, TextureFormat.RGBAFloat, false);
-
-        Camera c = GetComponent<Camera>();
-        c.targetTexture = colorImage;
-
-        Camera depthCamera = new GameObject("DepthCamera").AddComponent<Camera>();
-
-        depthCamera.CopyFrom(c);
-        // depthCamera.transform.position = c.transform.position;
-        // depthCamera.transform.rotation = c.transform.rotation;
-
-        // depthCamera.fieldOfView = c.fieldOfView;
-        // depthCamera.nearClipPlane = c.nearClipPlane;
-        // depthCamera.farClipPlane = c.farClipPlane;
-
-        // depthCamera.orthographic = c.orthographic;
-
-        depthCamera.targetTexture = depthImage;
-
-        depthCamera.clearFlags = CameraClearFlags.SolidColor;
-        depthCamera.backgroundColor = Color.black;
-
-        depthCamera.SetReplacementShader(Shader.Find("Custom/DepthOnly"), "");
-
-        Camera colorCamera2 = new GameObject("ColorCamera2").AddComponent<Camera>();
-        colorCamera2.CopyFrom(c);
-        colorCamera2.targetTexture = colorImage2;
-
         debugMaterial.mainTexture = outputImage;
 
         // Initialize FFmpeg process
@@ -83,16 +73,34 @@ public class RT3script : MonoBehaviour
     {
         float expectedFrames = Time.timeSinceLevelLoad * targetFrameRate;
         if (frameCount < expectedFrames) {
-            // Graphics.CopyTexture(colorImage, 0, 0, 0, 0, 256, 256, outputImage, 0, 0, 0, 0);
+            for(int i = 0; i < cameraList.Length; i++){
-            // Graphics.CopyTexture(depthImage, 0, 0, 0, 0, 256, 256, outputImage, 0, 0, 256, 0);
+                RenderTexture.active = colorImages[i];
+                outputImage.ReadPixels(new Rect(0, 0, 256, 256), (256*i), 0);
+                outputImage.Apply();
 
-            RenderTexture.active = colorImage;
+                RenderTexture.active = depthImages[i];
-            outputImage.ReadPixels(new Rect(0, 0, 256, 256), metadataWidth + 0, 0);
+                outputImage.ReadPixels(new Rect(0, 0, 256,256), (256*i), 256);
-            outputImage.Apply();
+                outputImage.Apply();
 
-            RenderTexture.active = depthImage;
+                //for the very first camera, encode the length of camera pairs before anything else
-            outputImage.ReadPixels(new Rect(0, 0, depthImage.width, depthImage.height), metadataWidth + 0, 256);
+                if (i==0) {
-            outputImage.Apply();
+                    //encode into pixels the number of camera pairs
+                    var colors = new Color[8];
+                    for (int j = 0; j < 8; j++) {
+                        //this logic does a bitwise check on the length value at bit j
+                        if (((cameraList.Length >> j) & 1)==1) {
+                            colors[j] = Color.white;
+                        }
+                        else {
+                            colors[j] = Color.black;
+                        }
+                    }
+                    outputImage.SetPixels(0,0,cameraList.Length,1, colors);
+                }
+                //encode into pixels transform matrix for this camera
+                outputImage.Apply();
+
+            }
             RenderTexture.active = null;
 
             // Get the raw pixel data and write it to FFmpeg's input stream

Assets/Scenes/SampleScene.unity

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