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3d_model.md
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In the world of [computers](computer.md) (especially in [computer graphics](graphics.md), but also e.g. in physics simulations etc.) 3D model is a representation of a [three dimensional](3d.md) object, for example of a real life object such as a car, [tree](tree.md) or a [dog](dog.md), but also possibly something more abstract like a [fractal](fractal.md) or [function](function.md) plot surface. 3D models can be displayed using various [3D rendering](3d_rendering.md) techniques and are used mostly to simulate [real world](real_world.md) on computers (e.g. [games](game.md)), as real world is, as we know, three dimensional. 3D models can be created in several ways, e.g. manually with 3D modelling software (such as [Blender](blender.md)) by 3D [artists](art.md), by 3D scanning real world objects, or automatically by [procedural generation](procgen.md).
3D models can be represented in many ways -- the **mainstream "game" 3D models** that most people are used to seeing are polygonal (made of triangles) boundary-representation (recording only surface, not volume) [textured](texture.md) (with "pictures" on their surface) 3D models, but keep in mind many different ways are possible and used too, for example various volume representations, [voxel](voxel.md) models, [point clouds](point_cloud.md), [implicit surfaces](implicit_surface.md), [spline](spline.md) surfaces, [constructive solid geometry](csg.md), [wireframe](wireframe.md) etc. Models may also bear additional extra information and features, e.g. bone rigs for animation, animation key frames, density information, [LODs](lod.md) and so on.
3D models can be represented in many ways -- the **mainstream "game" 3D models** that most people are used to seeing are polygonal (made of triangles) boundary-representation (recording only surface, not volume) [textured](texture.md) (with "pictures" on their surface) 3D models, but be aware that many different ways are possible and used too, for example various volume representations, [voxel](voxel.md) models, [point clouds](point_cloud.md), [implicit surfaces](implicit_surface.md), [spline](spline.md) surfaces, [constructive solid geometry](csg.md), [wireframe](wireframe.md) etc. Models may also bear additional extra information and features, e.g. bone rigs for animation, animation key frames, density information, [LODs](lod.md) and so on.
TODO: classification, operations (subdivision, booleans, ...), texturing, animation, formats, ...