Dot product of two vectors Online calculator. The goal of these tutorials is not to leave you with an exact replica of Geometry Wars, but rather to go over the necessary elements that will allow you. The code for an HTML document containing a form that allows a user to enter a polyhedron's face vertices and vertex coordinates was presented. For example, the vector 0:5 includes 5 as the last value, but 0:0. Calculation of the Magnitude to Know Its Components. MATLAB ® uses algorithms to generate pseudorandom and pseudoindependent numbers. Questions: In keeping with the "There's only one obvious way to do it", how do you get the magnitude of a vector (1D array) in Numpy? def mag(x): return math. The magnitude of a vector can be calculated by taking the square root of the sum of the squares of its components. Hence, it is convenient to consider a vector as originating from the origin. Vector b has magnitude 27 units ans a direction of 55 degrees above the + x axis. js ships with 20 chart types, including 3D charts, statistical graphs, and SVG maps. Using a scaled diagram, the head-to-tail method is employed to determine the vector sum or resultant. The vector object. Put the vector with its tail at the origin. Direction angle of a vector. For example, velocity, displacement etc. You can then use trig to get the x and y components of the force. But then I thought that the two smaller vectors are essentially pulling with each other, so their combined force would overcome green's. In symbols the magnitude of P Q → is written as | P Q → |. Slide v along u so that the tail. k is the last value in the vector only when the increment lines up to exactly land on k. Multiplication by another vector or a real number. If n is a unit vector in the direction of a vector F, then, using our laws of mutiplication, the vector F = Fn, since the factors on both sides have the same direction and magnitude. Adding and subtracting vectors in component form. js and the browser. ⚙️ An open source implementation of mathematical vectors in JavaScript - spikeburton/vector-js. It was designed as a presentation tool so that editors could engage with the challenging work of textual editing, rather than becoming experts in other technologies, such as XSLT, JavaScript and CSS, all components of the Versioning Machine. The function should return a newly constructed Vector object that is the result of normalising the ‘this’ Vector (making a unit Vector from it). However, I am not sure what the shader language command for getting the magnitude of a vector is. do not evaluate to real numbers. I need a response within next two days! Could you give me the command to use if there is one or how to do it? Thanks!. This in turn leads to savings of a similar magnitude over remaining development steps. What is the meaning of this statement, especially in relation to d/x r(t)=r'(t)?(Lets say r(t) is the position vector equation. Magnitude of a vector. During the *Signal Generator Back-to-Basics Webcast*, hosted by Agilent Technologies, on 29 February 2012, we received a number of real-time questions. ⚙️ An open source implementation of mathematical vectors in JavaScript - spikeburton/vector-js. In other words, the magnitude of A is the square root of a1 squared, plus a2 squared, plus a3 squared. The value of this method is not cached and uses a costly square-root function, so do not repeatedly call this method to get the vector's magnitude. If you only need to compare magnitudes of some vectors, you can compare squared magnitudes of them using sqrMagnitude (computing squared magnitudes is faster). If you think back to high school geometry, to add vectors, you place the first vector (say, south at 20 knots) and from the tip of the first vector you place your second vector (west at 50 knots). org First in-depth study of marine fungi and their cell-division cycles emerges. Vector components from magnitude & direction (advanced) Vector magnitude and direction review (article) | Khan Academy Review your knowledge of vector magnitude and direction, and use them to solve problems. So these 3 things conflict with each other: the motion of the dislocation is here perpendicular to the burger vector (and i have heard is always perpendicular for screw dislocations), so how can a burger vector denote the slip direction if the slip direction is the direction of the motion of the dislocation?. Dot product; Cross/scalar product; Angle between vectors. Their effect may be neutralized by a third force acting along their bisector in the opposite direction with a magnitude of_____ in this diagram, the resultant vector is the opposite direction, So what should I do the addition of vector or subtraction of vector? I am confused. Unit Vector. jsdocts uses NOC to wrap the jsdoc-toolkit. The flow direction and magnitude data can be stored in one dataset as two bands or two separate datasets. The size of the projection is a cosθ (where θ is the angle between the 2 vectors). It works great and I understand it properly, bar one thing. Zero vector is a vector with magnitude zero and an arbitrary direction. It produces high quality graphics in the SVG format and can be used in conjunction with the FF Web Console or Scratchpad. GitHub Gist: instantly share code, notes, and snippets. 12) is now available and ready for you to try out. Compute answers using Wolfram's breakthrough technology & knowledgebase, relied on by millions of students & professionals. The software is designed to compute a few eigenvalues with user specified features such as those of largest real part or largest magnitude. xmin = xmax = ymin = ymax = EquationExplorer. computes the direction of a refracted ray if i specifies the normalized(!) direction of the incoming ray and n specifies the normalized(!) normal vector of the interface of two optical media (e. This release both enhances 4. Lookup table. The resulting vector A × B is defined by: x = Ay * Bz - By * Az y = Az * Bx - Bz * Ax z = Ax * By - Bx * Ay. Sorry for the minor edits I've had to make to this reply. Vector Adder, Component Method. It also shows how to loop through the element of it. You can change the Direction of a Vector by multiplying it by another Vector. It is thanks to you that dCode has the best Vector Norm tool. Null return values. Vector operations can be done using member functions, which return new vectors, or static functions, which reuse existing vectors to avoid generating garbage. For data-aided reception with an ideal carrier phase recovery process, F can be used as the correction factor to take into account the above differential coding penalty. Vector proves to be very useful if you don't know the size of the array in advance or you just need one that can change sizes over the lifetime of a program. js ships with 20 chart types, including 3D charts, statistical graphs, and SVG maps. We often define unit vectors associated with a physical vector. Get started by signing up for the ArcGIS Developer Program at no cost. To subtract a vector, add its opposite Vector subtraction makes use of the definition of the negative of a vector The negative of a vector is defined as a vector with the same magnitude as the original vector but opposite in direction; for instance, the negative of the velocity of a car traveling 30 m/s to the west is -30 m/s to the west, or +30 m/s to the east; thus, adding a vector to its. Defines the element unique type (read only). This is Coding Math Episode 54, Dot Product. So in this case for example, if we have a vector V, the unit vector along this axis here denoted by n, is equal to the vector divided by the magnitude of the vector. The vector's magnitude and direction is best understood when the dislocation-bearing crystal structure is first visualized without the dislocation, that is, the perfect crystal structure. To try and fill that gap, I created the glMatrix library in 2010. Sorry for the minor edits I've had to make to this reply. Vector projection Online calculator. Lernen Sie die Übersetzung für 'magnitude vector' in LEOs Englisch ⇔ Deutsch Wörterbuch. Unit Vector. Magnitude of the vector's horizontal component: Magnitude of the vector's vertical component. The nail supports two forces A = 5N and B = 5N. foreachActive in interface Vector Parameters: f - the function takes two parameters where the first parameter is the index of the vector with type Int , and the second parameter is the corresponding value with type Double. To compute the gradient vector of a target pixel at location (x, y), we need to know the colors of its four neighbors (or eight surrounding pixels depending on the kernel). But, how can I tell Paraview that I specifically want the magnitude of just two components of the velocity vector. Magnitude of a Vector Description Measure the magnitude of a vector. Wind velocity-change (gust rise) criteria for wind turbine design. At the bottom of the screen are four bars which show the magnitude of four quantities: the length of A (red), the length of B (blue), the length of the projection of A onto B (yellow), and the dot product of A and B (green). The vector object. The input for this vector field renderer can be mosaic layers, raster layers, and netCDF raster layers. Normalizing a Vector. Like an array, it contains components that can be accessed using an integer index. Physicists, air traffic controllers, and video game creators all have at least one thing in common: vectors. Two forces, each equal to P, act at right angles. Dot product of two vectors Online calculator. 3 rad/s, angular velocity of vector 2 = 6. For instance, CoffeeScript can help prevent easy-to-make mistakes and offer a cleaner syntax and Babel can bring ECMAScript 6 features to browsers that only support ECMAScript 5. The magnitude and direction can be accessed via the methods mag() and heading(). if 'r' is a vector. I am working on my own shift vector function that will be used later to compute the convolution of two signals. Team dCode likes feedback and relevant comments; to get an answer give an email (not published). In this post, I intend to show you how to obtain magnitude and phase information from the FFT results. Outputs typescript declaration files from javascript files documented with jsDoc. The magnitude is the length of the vector. 2 GHz are supported by using a phase-locked loop (PLL) with a broadband integrated voltage controlled oscillator (VCO). Plotly JavaScript Open Source Graphing Library Built on top of d3. You do it for all vectors in question and then multiply by a new length/magnitude \$\endgroup\$ - Sidar. Check your answer using the calculator below. The other two vectors are pulling almost opposite of the green, but each have a lower magnitude of 4. 16e-2005 and IEEE Std 802. A Vector Quantity is a Quantity which possesses both magnitude as well as direction. Scale a normalized 2D vector always to the same length. If r is an array of vectors, then the norm does not return the magnitude, rather the norm!!. Compute answers using Wolfram's breakthrough technology & knowledgebase, relied on by millions of students & professionals. What is the magnitude of his displacement vector? A runner is training for an upcoming marathon by running around a 116-m-diameter circular track at constant speed. Vector functions are relatively simple to evaluate. Defines whether or not to display annotations on the schematic editor. Magnitude of a vector. To get the same figure orientation in MATLAB as in your Lumerical plots, you will need to define a uniform grid for the spatial vectors, x, y, z. What is the meaning of this statement, especially in relation to d/x r(t)=r'(t)?(Lets say r(t) is the position vector equation. Sometimes just the magnitude of a vector is needed. ; Fichtl, G. This datatype stores two or three variables that are commonly used as a position, velocity, and/or acceleration. A vector quantity is defined as a physical quantity which has both magnitude and direction. Vector values can have the same math operators applied to them that scalar values do. The brightness of celestial objects is expressed in magnitudes with each magnitude change equal to the 5th root of 100 or about 2. In this module of the 3-Phase PMSM Control Workshop with NXP's Model-Based Design Toolbox , the focus is on the Space Vector Modulation (SVM) technique needed for generating the appropriate PWM commands for the 3-phase inverter used for controlling the speed and position of PMSM's rotor. JSvg: Javascript Analysis and Vector Graphics JSvg is a graphical and statistical analysis program written in XUL+Javascript and delivered as a Firefox extension. It is also called the null vector. In the same way, I calculate the angle of rotation theta by the scalar product (v · n). I have a shapefile with fields: x y z u v V where the first 3 fields are point coordinates, u and v velocity in x and y direction, V velocity magnitude. Put the vector with its tail at the origin. Addition and subtraction of two vectors Online calculator. The size of the projection is a cosθ (where θ is the angle between the 2 vectors). Vector sum of equal 3 phases 120 degree apart is zero and serves as a neutral. I want to input to geogebra the variable t. To create a vector chart using KoolChart's JavaScript charting library, the and elements must be set in Layout. The direction is if you put it in the coordinate system, there's an angle θ that determines the direction of the vector. For example if you think about velocity/speed. That distance is the hypotenuse of the triangle that has a base of two and a height of one. For this vector in the problem. The green vector has magnitude of 5. Polymorphic vector operations for JavaScript I wrote a small vector math (linear algebra/geometric) library codeheart. foreachActive in interface Vector Parameters: f - the function takes two parameters where the first parameter is the index of the vector with type Int , and the second parameter is the corresponding value with type Double. In other words, the magnitude of A is the square root of a1 squared, plus a2 squared, plus a3 squared. I have been learning C++ now for 2 months and this week I started reading a book on 3D graphics. RF frequencies from 500 MHz to 4. Create two vectors and write down their magnitudes and directions. The way you are doing it is correct other than what @user5402 said about duplicate calls. Its properties are similar to vectors used in science and engineering. Vector Software GmbH becomes Vector Informatik GmbH, the logo is updated and the color red replaces the previous orange. Returns a vector of random length up to maxLength, in a random direction. Say that the vector is represented by (x, y) T. For example, consider the statement "Go 20 miles north". Find the magnitude and direction of this vector. NET Framework Also discuss all the other Microsoft libraries that are built on or extend the. Direction cosines of a vector Online calculator. So magnitude is basically the length of the vector. INTRODUCTION. Stream MAGNITUDE [A Vector Megalovania] (My Take) by Domondo from desktop or your mobile device. Inside the Anki Vector is a Qualcomm 200. Word problems on vectors. js is a high-level, declarative charting library. GitHub Gist: instantly share code, notes, and snippets. Adding and subtracting vectors in component form. xmin = xmax = ymin = ymax = EquationExplorer. However, note that the angle must really be between 90 degrees and 180 degrees because the first vector component is negative and the second is positive. $\begingroup$ C seems to be the vector that points from T to S. MATLAB uses a different convention for plotting matrix data than Lumerical. Lernen Sie die Übersetzung für 'magnitude vector' in LEOs Englisch ⇔ Deutsch Wörterbuch. Reduced "replacement of good parts" A tool-supported, consistent process during development also reduces the so-called "NTF (No Trouble Found) rate", which is the rate of improperly replaced "Good" ECUs in service shops. A vector is defined as having three dimensions as being represented by an ordered collection of three numbers: (X, Y, Z). The vector's magnitude and direction is best understood when the dislocation-bearing crystal structure is first visualized without the dislocation, that is, the perfect crystal structure. The magnitude is the length of the vector. This is Coding Math Episode 54, Dot Product. Examples: Find the magnitude: a = <3, 1, -2> b = 5i -j + 2k Show Step-by-step Solutions. Se você está vendo esta mensagem, significa que estamos tendo problemas para carregar recursos externos em nosso website. a vector is an element of vector space. This circuit is a complete implementation of the analog portion of a broadband direct conversion transmitter (analog baseband in, RF out). In this case, the arrow is omitted. a vector contains the same number of elements than the vector space has dimensions. " Magnitude is basically the length of the vector from head to tail. If the coordinates of the initial point and the end point of a vector is given, the Distance Formula can be used to find its. true-[true, false] type. For example, the vector 0:5 includes 5 as the last value, but 0:0. However, the cross product as a single number is essentially the determinant (a signed area, volume, or hypervolume as a scalar). The formula for the length of a 2D vector is the Pythagorean Formula. 2 GHz are supported by using a phase-locked loop (PLL) with a broadband integrated voltage controlled oscillator (VCO). Scalar and vector quantities are two of these types of measurement tools. This renderer is often used for visualizing flow direction and magnitude rasters, in meteorology and oceanography. NET Framework Also discuss all the other Microsoft libraries that are built on or extend the. , the largest coordinate in the vector V is the number 1). This library can be used to store vector's x and y data as an instance or to make vector operations like add, subtract, rotate, determining angle between two vectors as a static class. scalarProject public double scalarProject (Vector2d vec) Returns scalar projection of this vector onto argument. A unit vector is created through normalization, by dividing its components by its magnitude. Lookup table. A Point represents a fixed position, but a Vector represents a direction and a magnitude (for example, velocity or acceleration). Vector Adder, Component Method. VectorPlot treats the variables x and y as local, effectively using Block. Graph Practice. This is JavaScript 2D vector maths library for Node. File option to choose a new game and quit the game. A closed-form equation is derived for root mean square (rms) value of velocity change (gust rise) that occurs over the swept area of wind turbine rotor systems and an equation for rms value of velocity change that occurs at a single point in space. Displacement of an object is also a vector since the distance in a specific direction is taken into account when calculating the displacement. MATLAB ® uses algorithms to generate pseudorandom and pseudoindependent numbers. 2 First fundamental form Up: 3. The notation for absolute value is also used for the. foreachActive in interface Vector Parameters: f - the function takes two parameters where the first parameter is the index of the vector with type Int , and the second parameter is the corresponding value with type Double. Also, is there any other way to find a vector's magnitude that will give the correct answer without defining a new function?. We can add two vectors by joining them head-to-tail:. Generic, efficient JavaScript vector math using ordinary arrays: or indexed objects. x - the X magnitude of the other vector y - the Y magnitude of the other vector z - the Z magnitude of the other vector Returns: the dot product of the two vectors Since: JavaFX 8. [RightVector, UpVector, LookVector, -RightVector, -UpVector, -LookVector] are all directional vectors which face outward from their specified face of the object and have a magnitude of 1. A Computer Science portal for geeks. 5 m/s at 30. if 'r' is a vector. It's usually. Which is an equivaent statement of magnitude and angle of vector A? (Note: All angles are measured counterclockwise from the x-axis. The Dot Product gives a number as an answer (a "scalar", not a vector). Stream MAGNITUDE [A Vector Megalovania] (My Take) by Domondo from desktop or your mobile device. I want to input to geogebra the variable t. This bugs me simply because I know the computation of the unit vector required the magnitude as well. A vector cannot have any component of magnitude greater than magnitude of vector. magnitude() Alias for. The direction of the raster defines the angles, while the magnitude raster defines the size of the symbol. Every vector has a starting point and an endpoint. a) Give the vector whose length is 15 units and that makes an angle of -40 degrees with the positive x-axis. A brief description of the elements functionality. The vector cross product gives a vector which is perpendicular to both the vectors being multiplied. This is a tutorial on vector algebra and matrix algebra from the viewpoint of computer graphics. Their effect may be neutralized by a third force acting along their bisector in the opposite direction with a magnitude of_____ in this diagram, the resultant vector is the opposite direction, So what should I do the addition of vector or subtraction of vector? I am confused. The magnitude is the length of the vector. Se você está vendo esta mensagem, significa que estamos tendo problemas para carregar recursos externos em nosso website. Like an array, it contains components that can be accessed using an integer index. The pattern of coil emerged from angular velocity of vector 1 = 0. Calculating. The direction is correct, but i cannot see magnitude. A simple Vector class in javascript. To convert to polar form, we need to find the magnitude of the vector, , and the angle it forms with the positive -axis going counterclockwise, or. For instance, an object is said to have a velocity if it travels in a particular direction (say, "Northeast") at a particular rate (say, "30 knots"). The direction of a vector is an angle measurement where 0° is to the right on the horizontal. The way you are doing it is correct other than what @user5402 said about duplicate calls. Vectors are a concept fundamental to dealing with spatial environments and, in our case, development on Roblox, but it is common to observe difficulties in grasping the ideas. Also, the brighter an object the smaller the magnitude. Vector : <0,-3> graph, find magnitude, and direction. To subtract a vector, add its opposite Vector subtraction makes use of the definition of the negative of a vector The negative of a vector is defined as a vector with the same magnitude as the original vector but opposite in direction; for instance, the negative of the velocity of a car traveling 30 m/s to the west is -30 m/s to the west, or +30 m/s to the east; thus, adding a vector to its. The magnitude of a vector is simply denoted as the length, while the direction is typically defined by the angle it makes with the x- axis. Their effect may be neutralized by a third force acting along their bisector in the opposite direction with a magnitude of_____ in this diagram, the resultant vector is the opposite direction, So what should I do the addition of vector or subtraction of vector? I am confused. Identity and graphic design by Jerel Johnson. The software is designed to compute a few eigenvalues with user specified features such as those of largest real part or largest magnitude. In this module of the 3-Phase PMSM Control Workshop with NXP's Model-Based Design Toolbox , the focus is on the Space Vector Modulation (SVM) technique needed for generating the appropriate PWM commands for the 3-phase inverter used for controlling the speed and position of PMSM's rotor. Because forces are vectors, they can be used as a physical representation of vectors. Vector components from magnitude & direction Get 3 of 4 questions to level up! Practice. the dot product of n and i should be negative. It also contains functions for doing common vector operations. Vector Software GmbH becomes Vector Informatik GmbH, the logo is updated and the color red replaces the previous orange. A vector is an entity that has both magnitude and direction. It is impossible to add the two together because of their different dimensions. This is shown in the figure below. The appearance of the earthquake point symbols displayed by your vector tiles is managed by instructions saved in a JavaScript Object Notation (JSON) text file embedded in the. A Vector Quantity is a Quantity which possesses both magnitude as well as direction. To use this calculator enter the magnitude and direction of the first and second vectors. 43 for QPSK, 16-QAM, and 64-QAM, respectively. For example, the vector 0:5 includes 5 as the last value, but 0:0. Typically, a physics problem gives you an angle and a magnitude to define a vector; you have to find the components yourself using a little trigonometry. Find the unit vector with the direction of vector. If you add the resultant vector and the equilibrant vectors together, the answer is always zero because the equilibrant cancels the resultant out. Train on kata in the dojo and reach your highest potential. The Dot Product gives a number as an answer (a "scalar", not a vector). A closed-form equation is derived for root mean square (rms) value of velocity change (gust rise) that occurs over the swept area of wind turbine rotor systems and an equation for rms value of velocity change that occurs at a single point in space. It produces high quality graphics in the SVG format and can be used in conjunction with the FF Web Console or Scratchpad. In this unit, we learn two basic methods for determining the magnitudes of the components of a vector directed in two dimensions. Like an array, it contains components that can be accessed using an integer index. Angle between vectors Online calculator. A vector quantity is defined as a physical quantity which has both magnitude and direction. Dot Product and Normals to Lines and Planes. By constructing a vector diagram representing these velocities (or otherwise), calculate the magnitude (in mm/yr) of the velocity of point A relative to point B, vA-B. Make up your own vector addition problem. However, I am not sure what the shader language command for getting the magnitude of a vector is. This video by Khan Academy below introduces vectors and scalars. 16-2004) Std. Prove that the magnitude R of the position vector for the center of mass froman arbitrary origin is given by the equation: (Source: Herbert Goldstein, Classical Mechanics - Chapter 01) Solving for realize that. To perform scalar multiplication, you need to multiply the scalar by each component of the vector. For example, consider the statement “Go 20 miles north”. Velocity, displacement, acceleration, force, momentum, torque etc. Vector functions are relatively simple to evaluate. It includes classes for modelling vectors and matrices in any number of dimensions, and for modelling infinite lines and planes in 3-dimensional space. Apply the equation theta = tan–1(y/x) to find the angle: tan–1(1. {"categories":[{"categoryid":410,"name":"app-emacs","summary":"The app-emacs category contains extension packages for the Emacs text editor. A JavaScript-version of the n-vector library is available here, while JavaScript solutions to the 10 examples are available here. true-[true, false] type. In the company's fourth business year, sales revenue grows to over one million €. Myriam (13 reviews) 1st lesson free! Mark (5 reviews) 1st lesson free! Dr parikh (8 reviews). If you think back to high school geometry, to add vectors, you place the first vector (say, south at 20 knots) and from the tip of the first vector you place your second vector (west at 50 knots). The direction is if you put it in the coordinate system, there's an angle θ that determines the direction of the vector. Two vectors are equal when they have the same magnitude and direction. But what exactly are they, and why do they matter? David Huynh explains how vectors are a prime example of the elegance, beauty, and fundamental usefulness of mathematics. Determine whether a triangle can be formed with the given side lengths. The operation is performed on an element by element basis. It's usually. This video by Khan Academy below introduces vectors and scalars. Vector proves to be very useful if you don't know the size of the array in advance or you just need one that can change sizes over the lifetime of a program. Direction angle of a vector. The magnitude is clearly seen as the distance from (0, 0) to (2, 1) because of the definition we saw earlier ("its length corresponding to the magnitude of the vector. It covers most vector and matrix topics needed to read college-level computer graphics text books. It is thus a judgment of orientation and not magnitude: two vectors with the same orientation have a cosine similarity of 1, two vectors oriented at 90° relative to each other have a similarity of 0, and two vectors diametrically opposed have a similarity of -1, independent of their magnitude. using matlab to do the Snake program. It is possible to reset the magnitude or the magnitude squared of a vector: v2. For example to add the elements in vector a to the elements in vector b use the following command: > a + b [1] -8 -6 -4 -2. Vector’s Brain. You do not have to store the magnitude and direction, as they are immediately computable from the resulting vector. For example, a force acting on a body is a vector. The direction of the raster defines the angles, while the magnitude raster defines the size of the symbol. the dot product of n and i should be negative. Plotly JavaScript Open Source Graphing Library Built on top of d3. If is a vector of components (3, 4), find a unit vector in the same direction. sqrt(sum(i**2 for i in x)) The above works, but I cannot believe that I must specify such a trivial and core function myself. Make up your own vector addition problem. js ships with 20 chart types, including 3D charts, statistical graphs, and SVG maps. Commands Used VectorCalculus[Norm] See Also LinearAlgebra[Norm]. Parameters:. Meaning its c times as large as v if c is positive, and minus c times as large as v if c is negative. Operations on vectors in magnitude and direction form. The magnitude and direction can be accessed via the methods mag() and heading(). So i converted fields u and v to raster (feature to raster tool), then changed symbology. normal vector). Note that you can do the same operations with vector arguments. This is what I have done so far: Normalise function - your Vector object should have a 'normalise' function that takes no parameters. JavaScript source files for classes Point, Vector, Polygon, and Pyramid were presented. computes the direction of a refracted ray if i specifies the normalized(!) direction of the incoming ray and n specifies the normalized(!) normal vector of the interface of two optical media (e. Back to Course Index. A JavaScript vector maths library for Node.