Blender has the ability to limit the scope of rendering – outlining a region the special render border and checking the Border checkbox on the Render – Dimensions tab in Properties window. If such frame is set – Blender render only a limited area of the image.
There are two ways to set render border via the Blender API:
All user-defined classes (panels, operators), registered in Blender API, exists only during Blender runs. After program close they are deleted from memory. Therefore, if some variables are defined in user classes, all of them will be reset after Blender restart.
However, sometimes it is necessary to use in Blender add-on variables with values that not be lost in the process of program restarting. To retain variables values, it needs to wrap them into special class – property, and attach to any object whose properties are stored in * .blend file.
Creating Blender Add-ons variables with values saved in blend-filesRead More »
User defined operator classes, inherited from bpy.types.Operator, are static. Accordingly, only static variables can be defined in them.
Static variable sampleVar definition in SampleClass class:
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class SampleClass(bpy.types.Operator): bl_idname = "sample.sample_class" sampleVar = 5 def execute(self, context): print(self.sampleVar) self.__class__.sampleVar += 1 print(self.sampleVar) print(self.__class__.sampleVar) def sampleFunc(): SampleClass.sampleVar += 1 print(SampleClass.sampleVar) |
Blender 2.78 release.
Available for download from the official site.
One of the essential conditions of comfortable work is the convenience and speed of accessing add-ons functional. It is not enough to write an add-on and register it in Blender API system. Be sure to give the easy call add-on functions ability to the user. So, any add-on should determine a place to put interface buttons that provide access to its functionality.
All available Blender user interface located on panels. Three panels are the most used: T-bar – opens/hides by pressing the t keyboard button, N-bar – opens/hides by pressing the n button, and the Properties panel – called in the main menu of any window, typed it as Properties.
Blender API allows defining users panels to place add-on functional buttons on any of these three main panels.
Creating panels for placing Blender add-ons user interface (UI)Read More »
Blender scripting system provides lots of opportunities to simplify and accelerate the workflow, allowing to outsource routine operations to the system and expanding work opportunities through access to the scripting language. However, writing a good script which can be used frequently in various projects, uncomfortable each time to reconnect it to each new project. In addition, this script can be improved with some windows and editable parameters fields. Making complete add-on from the script, you can expand it with additional functionality and connect to the Blender add-ons system.
From a certain time to improve work speed and convenience it is necessary to have some functionality that does not exist in the base Blender. To improve its capabilities Blender community users wrote a lot of extras – add-ons. The required add-ons can be purchased or free downloaded from specialized Internet sites. After receiving the necessary add-on, it needs to make a few steps to install it to the Blender program.
For example, let’s install to the Blender add-on allowing to make wireframe render by pressing a certain key combination.
Blender has an internal text editor to write scripts on Python language. However, this editor is much inferior to specially designed for writing code IDEs. There is no satisfactory autocomplete, comfortable syntax lighting, possibility to organize projects in Blender internal text editor – all those things that determine the speed and ease of code writing. However, it is not difficult to connect and use an external IDE for writing Blender scripts.
Using external IDE PyCharm for writing Blender scriptsRead More »
To create screws in Blender the easiest way is to use plugin, like Bolt Factory, which comes in standart complectation. But the plugin features are not always enough, and the result of using Subdivision Surface modifier on the screw created by plugin is not very beautiful. However, it is not difficult to create screw manually.
Lets create high poly screw suitable to render in any major plans.
