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scenecapturescript.py

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+#!/usr/bin/env python3
+
+import bpy
+import os,sys,math
+import numpy as np
+
+"""
+Rendering script for translating a blender scene into a full sky HDR image.
+This script takes a series of screenshots at different camera angles, and outputs them to a directory
+
+In this setup, the camera is adjusted to have a 50 degree field of view (so that the renders overlap slightly) and a square image output (equal aspect ratio)
+"""
+
+#X and Z camera angles for 50 degree fov screenshots to form a full-sky panorama
+xorient = np.arange(-90,90,15)
+zorient = np.arange(0,360,15)
+
+#Unfortunately, this must be an absolute path in blender on Linux
+# Output directory for which to output a series of screenshots
+outdir = "/absolute/path/to/your/outdir"
+
+def orient_camera(x,y,z):
+    """_
+        orient_camera(x,y,z)
+        x,y,z - camera angles in degrees.
+        Called from within blender to orient the camera, assumed to be named "Camera"
+    """
+    camera = bpy.data.objects["Camera"]
+    camera.rotation_mode = 'XYZ'
+    camera.rotation_euler[0] = x
+    camera.rotation_euler[1] = y
+    camera.rotation_euler[2] = z
+    
+    #update scene to apply changes
+    bpy.context.view_layer.update()
+    
+    return
+
+def render(outdir = outdir, fname="tmp.png"):
+    """
+    render(outdir, fname)
+        outdir - the output directory in which to place the rendered image
+        fname - the output filename for the rendered image
+
+        Called from within blender to render a still image at the given location
+    """
+
+
+    fname = os.path.join(outdir,fname)
+    
+    camera = bpy.data.objects["Camera"]
+    
+    scene = bpy.context.scene
+    
+    scene.render.filepath = fname
+    
+    bpy.ops.render.render(write_still=True)
+    
+    return
+
+
+
+def main1():
+    """
+        The main script.
+        Rotates the camera around and saves a series of named outputs
+        output names are scene_{x_angle_in_degrees}_{z_angle_in_degrees}
+    """
+
+    for I in range(0,len(xorient)):
+        for J in range(0,len(zorient)):
+            
+            xx = np.floor(xorient[I])
+            zz = np.floor(zorient[J])
+            
+            fnout = "scene_{:d}_{:d}.png".format(int(xx),int(zz))
+            
+            orient_camera((xorient[I]+90)*np.pi/180,0,zorient[J]*np.pi/180)
+            render(outdir=outdir,fname=fnout)
+
+main1()