3D marketplace of computer/video game related models for 3D printing. Relying on the growing video/computer gaming trend, Gambody has thought to come to the help of numerous video game fans and 3D printing enthusiasts and came up with the idea of creating a platform for 3D printing models of their favorite heroes, war vehicles, aircrafts, cars and many more, from their beloved video/computer.

.number: For integer specifiers (d, i, o, u, x, X): precision specifies the minimum number of digits to be written. If the value to be written is shorter than this number, the result is padded with leading zeros. The value is not truncated even if the result is longer. A precision of 0 means that no character is written for the value 0.
Send money to your PayPal. #2- Ibotta US ONLY Ibotta is an app that pays you for shopping. If you buy your groceries or beauty products online, you can choose from a select number of items listed in the app.
Design your own T-shirt by customizing your own text, design, or image on a variety of custom products, like hoodies, hats, or aprons. Spreadshirt has over 100 unique products for all your T-shirt printing and T-shirt design needs. Custom shirts make great personalized gifts for family and friends!
View Print Specials. 4,000+ Customer Reviews Read Reviews. Bulk Color Copies. Order a large amount of 1 original, non-bleed copies on 20/50# Bond for extreme savings! 1,000 copies - 8¢ ea. 2,500 copies - 7¢ ea. 5,000 copies - 6¢ ea. 10,000 copies - 5¢ ea. New Printing Services.

STL
Filename extension
A CAD representation of a torus (shown as two concentric red circles) and an STL approximation of the same shape (composed of triangular planes)
Internet media type
Developed by	3D Systems
Initial release	1987
Type of format	Stereolithography

STL is a file format native to the stereolithographyCAD software created by 3D Systems.^[1]^[2]^[3] STL has several backronyms such as 'Standard Triangle Language' and 'Standard Tessellation Language'.^[4] This file format is supported by many other software packages; it is widely used for rapid prototyping, 3D printing and computer-aided manufacturing.^[5] STL files describe only the surface geometry of a three-dimensional object without any representation of color, texture or other common CAD model attributes. The STL format specifies both ASCII and binary representations. Binary files are more common, since they are more compact.^[6]

An STL file describes a raw, unstructured triangulated surface by the unitnormal and vertices (ordered by the right-hand rule) of the triangles using a three-dimensional Cartesian coordinate system. In the original specification, all STL coordinates were required to be positive numbers, but this restriction is no longer enforced and negative coordinates are commonly encountered in STL files today. STL files contain no scale information, and the units are arbitrary.^[7]

ASCII STL[edit]

An ASCII STL file begins with the line

where name is an optional string (though if name is omitted there must still be a space after solid). The file continues with any number of triangles, each represented as follows:

where each n or v is a floating-point number in sign-mantissa-'e'-sign-exponent format, e.g., '2.648000e-002'. The file concludes with

An example ASCII STL of a sphericon

The structure of the format suggests that other possibilities exist (e.g., facets with more than one 'loop', or loops with more than three vertices). In practice, however, all facets are simple triangles.

White space (spaces, tabs, newlines) may be used anywhere in the file except within numbers or words. The spaces between 'facet' and 'normal' and between 'outer' and 'loop' are required.^[6]

Binary STL[edit]

Because ASCII STL files can be very large, a binary version of STL exists. A binary STL file has an 80-character header (which is generally ignored, but should never begin with 'solid' because that may lead some software to assume that this is an ASCII STL file). Following the header is a 4-byte little-endian unsigned integer indicating the number of triangular facets in the file. Following that is data describing each triangle in turn. The file simply ends after the last triangle.

Each triangle is described by twelve 32-bit floating-point numbers: three for the normal and then three for the X/Y/Z coordinate of each vertex – just as with the ASCII version of STL. After these follows a 2-byte ('short') unsigned integer that is the 'attribute byte count' – in the standard format, this should be zero because most software does not understand anything else.^[6]

Floating-point numbers are represented as IEEE floating-point numbers and are assumed to be little-endian, although this is not stated in documentation.

Color in binary STL[edit]

There are at least two non-standard variations on the binary STL format for adding color information:

The VisCAM and SolidView software packages use the two 'attribute byte count' bytes at the end of every triangle to store a 15-bit RGB color:
- bits 0 to 4 are the intensity level for blue (0 to 31),
- bits 5 to 9 are the intensity level for green (0 to 31),
- bits 10 to 14 are the intensity level for red (0 to 31),
- bit 15 is 1 if the color is valid, or 0 if the color is not valid (as with normal STL files).
The Materialise Magics software uses the 80-byte header at the top of the file to represent the overall color of the entire part. If color is used, then somewhere in the header should be the ASCII string 'COLOR=' followed by four bytes representing red, green, blue and alpha channel (transparency) in the range 0–255. This is the color of the entire object, unless overridden at each facet. Magics also recognizes a material description; a more detailed surface characteristic. Just after 'COLOR=RGBA' specification should be another ASCII string ',MATERIAL=' followed by three colors (3×4 bytes): first is a color of diffuse reflection, second is a color of specular highlight, and third is an ambient light. Material settings are preferred over color. The per-facet color is represented in the two 'attribute byte count' bytes as follows:
- bits 0 to 4 are the intensity level for red (0 to 31),
- bits 5 to 9 are the intensity level for green (0 to 31),
- bits 10 to 14 are the intensity level for blue (0 to 31),
- bit 15 is 0 if this facet has its own unique color, or 1 if the per-object color is to be used.

The red/green/blue ordering within those two bytes is reversed in these two approaches – so while these formats could easily have been compatible, the reversal of the order of the colors means that they are not – and worse still, a generic STL file reader cannot automatically distinguish between them. There is also no way to have facets be selectively transparent because there is no per-facet alpha value – although in the context of current rapid prototyping machinery, this is not important.

The facet normal[edit]

In both ASCII and binary versions of STL, the facet normal should be a unit vector pointing outwards from the solid object.^[8] In most software this may be set to (0,0,0), and the software will automatically calculate a normal based on the order of the triangle vertices using the 'right-hand rule', i.e. the vertices are listed in counter-clock-wise order from outside. Some STL loaders (e.g. the STL plugin for Art of Illusion) check that the normal in the file agrees with the normal they calculate using the right-hand rule and warn the user when it does not. Other software may ignore the facet normal entirely and use only the right-hand rule. Although it is rare to specify a normal that cannot be calculated using the right-hand rule, in order to be entirely portable, a file should both provide the facet normal and order the vertices appropriately. A notable exception is SolidWorks, which uses the normal for shading effects.

Use in 3D printing[edit]

Wikipedia logo

3D printers build objects by soli

On Print 3d Number For Real Money Colors