The problem. Typically, occlusion is set on whether theres an object in between the listener and the sound source.

How is occlusion done in game engines This isnt for all game engines, but its a method that has low computational cost and usually does the trick as a quick fix.

If there is something blocking this line, then this will tell the engine to switch the occlusion on (usually this would entail adding a bit of low-pass filtering and a lowering in volume).

Heres how it sounds: n,url:,width:854,height:480,providerName:YouTube,thumbnailUrl:,resolvedBy:youtube data-block-type32 idblock-yui31721153407475486811757 data-provider-nameYouTube Is there an alternative Well.

Their talk focussed on the audio development on their 2016 title Overwatch (I not only recommend you watch the talk but also play the game.

And the simple principle is this: Depending on how far along the path you are, compared to how far the sound source is along the path, will dictate the amount of occlusion to be applied to the sound source.

The distance, along the spline, between these two locations is then stored as a distance along the spline float value, and then compared with the total distance of the spline.

In Blueprint, Wwise offers this.

The Min Of Float Array node returns the lowest occlusion amount from the array of spline occlusion values.).

Grid X is Num X 2 which will be useful with making triangles.

It provides enough information to fill in text, make procedural generated shapes, or fill in user drawn areas during run-time of a content creation application.

This tutorial covers the first step of a very simple algorithm to fill in an outline with efficient equilateral triangles.

We will be using Unreal Engine Blueprints but the methods can be used for any game engine or language of your choice.

It also has a directional vector which we can use to calculate if a point lies in the internal area or not.

The red arrows in the image below show the direction of each spline point.

A Spline and Triangle Size are the only 2 inputs we need for this function.

The Final mesh can be rotated back into place if the curve oriented differently, but this assumption will make our calculations easier.

Depending on the size of object this value should be clamped accordingly.

The first part of this function is to only get the number of points in the X and Y directions.

The height of the triangle needs to be calculated by multiplying half the triangle size by the Tangent of 60 degrees.

We need to set up a loop within a loop and keep track of the Index X and Index Y.

The Component Bounds used earlier provides an extent from a center location so the first index of both X and Y will need to be multiplied by -1 for the first index and increase by 1 until it reaches the last index.

The Origin or the Component Bounds are added to their X and Y values respectively.

Notice how half the Triangle Size is added to the the X value for only the odd numbered Y values.

Finally the Z value is appended to make the final vector for Current Loc.

The point locations near the outline should be moved to their closest location on the outline.

The following image is the goal we are trying to achieve with filtering.

A cross product of 2 vectors will provide a third vector that is perpendicular to both.

If we assume the Up Vector of the Spline is up or (0, 0, 1), we can cross that with the Direction Closest to World Location and get a vector that is perpendicular to the Spline Outline.

When we dot that with the vector between the Current Loc and the Location Closest to World Location it should be greater than 0.0 if the point falls inside the Outline.

We can assign a value of -1 and increment each time so that we get numbers starting with 0.

Future hint: if all 3 neighboring points add up to 3, we should not make a triangle.

Using Size to Fit is costly and unnecessary if we know the size beforehand.

Get Distance Along Spline Ue4