camera sorta works using the old voxel-raycaster style of spherical coords

resources/plane.obj

@@ -0,0 +1,17 @@
+# Blender v2.79 (sub 0) OBJ File: ''
+# www.blender.org
+mtllib plane.mtl
+o Plane
+v -7.780000 0.000000 7.780000
+v 7.780000 0.000000 7.780000
+v -7.780000 0.000000 -7.780000
+v 7.780000 0.000000 -7.780000
+vt 1.000000 0.000000
+vt 0.000000 1.000000
+vt 0.000000 0.000000
+vt 1.000000 1.000000
+vn 0.0000 1.0000 0.0000
+usemtl None
+s off
+f 2/1/1 3/2/1 1/3/1
+f 2/1/1 4/4/1 3/2/1