Set F3D camera based on model up direction

Author: Floppy

app/uploaders/application_uploader.rb

@@ -30,7 +30,6 @@ class ApplicationUploader < Shrine
     "anti-aliasing" => "true",
     "axis" => "0",
     "background-color" => "0,0,0",
-    "camera-direction" => "-1,-0.5,-1",
     "filename" => "0",
     "grid" => "1",
     "grid-color" => "0,255,255",
@@ -43,6 +42,11 @@ class ApplicationUploader < Shrine
     "translucency-support" => "1"
   }.map { |k, v| "--#{k}=#{v}" }.join(" ").freeze
 
+  CAMERA_OPTS = {
+    "+z" => "-1,1,-0.5",
+    "+y" => "-1,-0.5,-1"
+  }
+
   storage(/library_(\d+)/) do |m|
     Library.find(m[1]).storage # rubocop:disable Pundit/UsePolicyScope
   rescue ActiveRecord::RecordNotFound
@@ -123,7 +127,8 @@ def generate_location(io, record: nil, derivative: nil, metadata: {}, **)
       end
     elsif SupportedMimeTypes.can_render?(context[:record].mime_type)
       Shrine.with_file(original) do |it|
-        render = StringIO.new(`f3d #{it.path} #{F3D_OPTS}`)
+        up = context[:record]&.up_direction
+        render = StringIO.new(`f3d #{it.path} #{F3D_OPTS} --up=#{up} --camera-direction=#{CAMERA_OPTS[up]}`)
         {
           render: (render.length > 0) ? render : nil
         }.compact