what is the difference between 2d drawing and 3d models
TWO-DIMENSIONAL (2D) DRAWINGS
The abbreviation for two-dimensional drawing is 2-D, and information technology describes a view having but width and height, width and length, or height and length dimensions. Two-dimensional drawings are the established pattern and drafting format and are common in all technology and architectural industries and related disciplines.
The figure shows a drawing with two 2-D views representing the geometry of an shipping part. The two views together provide width, meridian, and length dimensions. Views appear in flat form and are commonly rotated 90 degree from each other. A consummate ii-D drawing typically includes dimensions, notes, and text that describes view features and details.
Ii-dimensional drawings are the conventional and often required method of communicating a project. An effective ii-D drawing accurately describes design intent and production requirements, including the size, shape, and characteristics of all features, and materials, finishes, and manufacturing or construction methods. A ii-D drawing also typically documents additional project information, such as the individuals and companies involved with the projection, relevant dates, approvals, and pattern revision history. 2-dimensional drawings can likewise provide computer numerical control (CNC) car code. However, compared to 3-D surface and solid models, two-D draw-ings offer fewer options for presenting and visualizing ideas and limited ability to clarify and exam production pattern. In addition, 2-D drawings can sometimes be diffi cult to sympathize, particularly if the reader is unfamiliar with interpreting 2-D drawings.
THREE-DIMENSIONAL (3D) DRAWINGS
The abbreviation for three-dimensional is three-D, and it describes an object having a width, acme, and depth dimensions. A wire-frame model is the nearly basic three-D CAD model, and it contains only information about object edges and vertices. The word vertices are plural for vertex, which is the bespeak where edges intersect. The term wireframe describes the appearance of the model as if constructed from wires.
Three-dimensional surface and solid modeling take replaced wireframe modeling in the CAD industry. Wireframe models accept limited utilise as models because they lack surfaces and mass. Without surfaces, wireframe models are difficult to visualize, create doubt nigh design intent, practice non provide a true representation of a product, and lack volume. Some software offers the power to hide or alter the format of the lines that autumn behind object features to improve visualization and every bit a style to create a 3-D representation, or pictorial, view for a 2-D drawing. However, the display can still cause confusion, especially when viewing circuitous objects. Without volume or mass, wireframe models offer limited ability to clarify and test products.
A wireframe model does offer small file size and fast brandish regeneration because of the file only store border and vertex data. Wireframe models can besides serve as a basis for constructing three-D surface and solid models, and they tin provide the geometry for 2-D drawings. By rotating and repurposing a wireframe model, it is possible to produce the 2-D views shown in Effigy. Wireframe models can also provide 3-D CNC machine code.
Three-DIMENSIONAL (3D) SURFACE MODELS
A surface model contains information about object edges, vertices, and surfaces (encounter Figure). A surface is an outer purlieus of an object that connects to edges and vertices. Surfaces tin can display color, shading, reflection, and texture that significantly improves visualization. Surfaces reduce dubiety about design intent and provide a true representation of a product. Surface modeling also offers the ability to create complex curves and forms. The figure shows an instance of a surface model with photorealistic surfaces and complex forms.
Three-dimensional surface modeling is common in the CAD industry, particularly for industrial and conceptual design and to construct certain shapes. A surface model has zero thickness, lacks mass, and may not enclose a volume. Surface models let for bones calculations such as area and volume, merely without mass, they offering limited ability to analyze and test physical and inertial properties. As a effect, the nearly common users of surface models are designers who are primarily concerned with the external shape and appearance of a production. Gunkhole and ship hull design is a common application for surface modeling. An motorcar trunk panel is another example of a product that requires accurate surfaces. Animations, video games, virtual reality programs, and programs with similar requirements oftentimes use surface models because of the ability to grade complex surfaces, specially when solids are unnecessary and file size is generally smaller than solid model files.
Surface models can serve every bit a basis for constructing 3-D solid models, and they can provide the geometry for 2-D drawings. By rotating and repurposing a surface model, it is possible to produce the 2-D views and display realistic surfaces on the three-D representation, or pictorial, views. Surface models can also provide iii-D CNC automobile code.
THREE-DIMENSIONAL (3D) SOLID MODELS
3A solid model is the near circuitous CAD format, and information technology contains information near object edges, vertices, surfaces, and mass. An accurate solid model is an exact digital representation of a product. Like surface models, solid models tin brandish surface color, shading, reflection, and texture for presentation and visualization. The figure shows an example of a photorealistic solid model. Solid models besides offer the ability to create intricate curves and forms. However, some designs require surface modeling in order to produce the desired form for a solid model. Some solid modeling software includes surface modeling tools to assistance model complex shapes that only surface modeling can produce or create efficiently.
Solid models are the most common 3-D CAD format used in the current CAD manufacture. A solid model encloses a volume and has mass, which allows designers and engineers to analyze the outside and interior object characteristics and perform interference and collision checks, mass calculations, and simulations. In contrast to a 2-D drawing that includes a note that specifi es the cloth assigned to a product, and a 3-D surface model that displays a representation of material on surfaces, a 3-D solid model can be assigned a cloth that closely replicates the material used to manufacture the product. Assigning a material to a solid model allows for analyzing and testing physical and inertial backdrop. The result is a solid model that acts as a digital prototype of a product. Solid models can provide the geometry for 2-D drawings. Past rotating and repurposing a solid model, it is possible to produce the two-D views shown in Figure and brandish realistic surfaces on the 3-D representation or pictorial views. Solid models can also provide data for rapid prototyping and three-D CNC machine code.
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Source: https://astcad.com.au/difference-between-2d-3d-drawings/
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