adding code

app.py

@@ -0,0 +1,41 @@
+import streamlit as st
+import os
+import nerf
+import torch
+
+# Check if the directory called Model exists
+if not os.path.exists("Model"):
+    # Create the directory
+    os.mkdir("Model")
+
+# Check if the model is downloaded
+if not os.path.exists("Model/nerf_model.ckpt"):
+    # Download the model
+    wget https://github.com/bmild/nerf/releases/download/v0.5/nerf_model.ckpt
+
+# Load the NeRF model
+nerf_model = nerf.NeRF.load("Model/nerf_model.ckpt")
+
+# Define the camera parameters
+camera = nerf.Camera(
+    fov=60,
+    focal_length=50,
+    znear=1,
+    zfar=100,
+    principal_point=(0.5, 0.5),
+)
+
+# Define the viewing direction
+viewing_direction = torch.tensor([0, 0, 1])
+
+# Render the novel view
+novel_view = nerf_model.render(viewing_direction, camera)
+
+# Save the novel view
+torch.save(novel_view, "novel_view.png")
+
+# Create a Streamlit app
+st.title("NeRF with Dolly Zoom")
+
+# Show the image
+st.image("novel_view.png")