add orthographic camera

Author: HTDerekLiu

BlenderToolbox/cycles/demo_orthocameraFromMat.py renamed to BlenderToolbox/cycles/demo_orthocamera.py

@@ -19,12 +19,12 @@
 
 import numpy as np
 
-outputPath = './results/demo_orthocameraFromMat.png'
+outputPath = './results/demo_orthocamera.png'
 
 # # init blender
 imgRes_x = 720  # increase this for paper figures
 imgRes_y = 720  # increase this for paper figures
-numSamples = 50 # usually increase it to >200 for paper figures
+numSamples = 20 # usually increase it to >200 for paper figures
 exposure = 1.0
 blenderInit(imgRes_x, imgRes_y, numSamples, exposure)
 
@@ -56,19 +56,13 @@
 invisibleGround(groundCenter, groundSize, shadowDarkeness)
 
 # # set camera
-# camLocation = (1.9,2,2.2)
-# lookAtLocation = (0,0,0.5)
-# focalLength = 45
-# cam = setCamera(camLocation, lookAtLocation, focalLength)
-
+camLocation = (1.9,2,2.2)
+lookAtLocation = (0,0,0.5)
 left = -1.0
 right = 1.0
 top = 1.0
-bottom = 1.0
-
-bpy.context.object.data.type = 'ORTHO'
-bpy.context.object.data.ortho_scale = 2
-
+bottom = -1.0
+cam = setCamera_orthographic(camLocation, lookAtLocation, top, bottom, left, right)
 
 # # set sunlight
 lightAngle = (-15,-34,-155) 

BlenderToolbox/cycles/include.py

@@ -25,6 +25,7 @@
 from utils.recalculateNormals import *
 from utils.selectOBJ import *
 from utils.setCamera import *
+from utils.setCamera_orthographic import *
 from utils.setCameraPath import *
 from utils.setLight_sun import *
 from utils.setLight_ambient import *

BlenderToolbox/cycles/results/demo_orthocamera.png

@@ -0,0 +1,33 @@
+# Copyright 2020 The TensorFlow Authors, Derek Liu
+# 
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import bpy
+import math
+import mathutils
+from utils.lookAt import *
+
+def setCamera_orthographic(camLocation, lookAtLocation, top, bottom, left, right):
+	# scale the resolution y using resolution x
+  assert(abs(left-right)>0)
+  assert(abs(top-bottom)>0)
+  aspectRatio = abs(right - left)*1.0 / abs(top - bottom)
+  bpy.context.scene.render.resolution_y = bpy.context.scene.render.resolution_x / aspectRatio
+
+  bpy.ops.object.camera_add(location = camLocation)
+  cam = bpy.context.object
+  bpy.context.object.data.type = 'ORTHO'
+  cam.data.ortho_scale = abs(left-right)
+  loc = mathutils.Vector(lookAtLocation)
+  lookAt(cam, loc)
+  return cam