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An introduction to light sources in WebGL. We will start with an overview the different types of lighting in WebGL. This lesson will cover creating a directional light source of a certain color, setting normals on vertices, and use these two things to calculate the color of a surface at any point.
This video will cover how to load and apply textures to 3d forms in WebGL. This video scratches the surface of textures in WebGL. For more information on textures, check out the MDN docs on WebGL.
In this lesson we start doing some more advanced modeling by connecting multiple triangles into a single surface with a simple for-loop. We will review the different modes WebGL has for drawing arrays. After reviewing, triangle strip will be used to create a complex mathematical 3D form.
This time we look at the last drawing mode, triangle fan, which can be useful for drawing different types of 3d forms. Combine this mode with triangle strip to creating complex models.
In this lesson, we look at how to consolidate different data, such as position and color, into a single vertex array. This becomes more important as we keep adding attributes such as per-vertex data for lighting and textures. We will update the
stride value in the
vertexAttribPointer method to accommodate these changes.
In this lesson we will apply a single color per vertex and see how those colors are interpolated across an entire triangle, making use of a new kind of shader variable. We will also see how enabling
gl.DEPTH_TEST will give our model proper depth by having webGL pay attention to z-values.
Array reduce is used to accumulate a new value by applying a function that you provide to each item in your source array. Reduce behaves differently based on whether or not you provide an initial value - we cover this in depth in this lesson and provide some practical use cases.
When you want to build your logic with small, composable functions you need a functional way to handle conditional logic. You could wrap ternary expressions and if/else statements in functions, handling all of the concerns around data mutation yourself, or you could leverage the conditional functions supplied by Ramda. In this lesson, we'll cover several of Ramda's conditional functions:
A part of Natural Language Processing (NLP) is processing text by “tokenizing” language strings. This means we can break up a string of text into parts by word, sentence, etc. In this lesson, we will use the
natural library to tokenize a string. First, we will break the string into words using
TreebankWordTokenizer. Then we will break the string into sentences using
The key to being productive with Immutable JS is understanding how to update values that are nested. Using
setIn you can place a new value directly into an existing or new path. If you need access to the previous value before setting the new one, you can use
updateIn accepts the same path lookups as
setIn, but gives you a callback function instead so that you can use the previous value however you wish and return an updated version.
every method returns true or false based on whether or not every item in the array passes the condition you provide in a callback function. In this lesson we look at some practical examples for simple validation, inferring state from data and for re-using the logic in our callbacks with array filters.
Function.bind is useful for more than locking down the
this context when calling a function. This lesson shows how
Function.bind can be used to make a new function with pre-specified initial arguments. This is a simple example of a functional programming technique called partial application which allows the remaining arguments to be specified when the new function is called.
Sometimes you need to filter an array of objects or perform other conditional logic based on a combination of factors. Ramda's
where function gives you a concise way to declaratively map individual predicates to object properties, that when combined, cover the various facets of your conditions. In this lesson, we'll look at how this powerful function can be used for scenarios requiring a complex predicate function.
get method from the popular utility library
We'll learn how to get a subset of an array by specifying items to include with filter, or items to exclude using reject. We'll also look at how to get the results from both filter and reject, neatly separated with partition.
Often when testing, you use the actual result to create your assertion and have to manually update it as you make changes to the feature. With Jest snapshot testing, you can let Jest do this part for you and write more tests and features faster and with more confidence. Let's learn about how you can use Jest snapshot testing to improve your own workflow.
Jest comes pre-packaged with the ability to track code coverage for the modules you're testing, but it takes a little extra work to make it track untested files as well. Let's look at what Jest can do for you, what you have to do yourself, and how to setup code coverage thresholds so you can work to improving the code coverage numbers for your projects.