Editing Drag and drop (section)

== In end-user programming ==
Drag and drop is considered an important program construction approach in many [[end-user development]] systems. In contrast to more traditional, text-based programming languages, many end-user programming languages are based on visual components such as tiles or icons that are manipulated by end users through drag-and-drop interfaces. [[AgentSheets]],<ref>{{cite web|url=https://sgd.cs.colorado.edu/wiki/images/2/21/20YearsofBlockProgramingLessonsLearned_published.pdf|title=Moving Beyond Syntax: Lessons from 20 Years of Blocks Programing in AgentSheets|work=Journal of Visual Languages and Sentient Systems|access-date=29 November 2018|archive-url=https://web.archive.org/web/20190428121123/https://sgd.cs.colorado.edu/wiki/images/2/21/20YearsofBlockProgramingLessonsLearned_published.pdf|archive-date=28 April 2019|url-status=dead}}</ref> a programming environment for kids, introduced the modern notion of drag and drop blocks programming providing 4 core affordances: 1) Blocks that are end-user composable, 2) blocks are end-user editable, 3) blocks can be nested to represent tree structures, 4) blocks are arranged geometrically to define syntax. Drag and drop is also featured in many shader editing programs for graphics tools, such as [[Blender (software)|Blender]].<ref>{{cite web|url=http://wiki.blender.org/index.php/Doc:2.6/Manual/Materials/Nodes|title=Render – Blender Reference Manual|work=blender.org|access-date=24 January 2014|archive-url=https://web.archive.org/web/20150323033003/http://wiki.blender.org/index.php/Doc:2.6/Manual/Materials/Nodes|archive-date=23 March 2015|url-status=dead}}</ref> Drag and drop also features in some video game engines, including [[Unreal Engine]], [[GameMaker Studio]], [[Construct 2]] and, with expansion, [[Unity (game engine)|Unity]].