INTRODUCTION
The hemisphere renderer could be used to represent spawn points, script entity origins or anything similar. The benefit of an hemisphere is that it could represent the angles of an object nicely, as the other half of the sphere is removed. Due to this, we are not clipping unnecessarily through walls and other objects.
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The source code for this project could be found in this GitHub link.
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The C++ equivalent for this project could be found in this GitHub link.
PROGRAMMING
The above code is the logic behind drawing hemispheres. The code has been written in Squirrel, which is a high level imperative, object-oriented programming language. All code is JIT compiled. The language has been modified for this engine, the syntax is different compared to the original Squirrel implementation.
This code snippet gets ran after entity's have been created and initialized on the server. We get an array of all "info_player_start" entity's, and draw their origin and angles with the hemisphere renderer.
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The main purpose of this code is to demonstrate how we could use the hemisphere renderer within the script API of the engine. The renderer is exposed to all script VM's (SERVER, CLIENT and UI).
Here we render hemispheres at all "info_player_start" origins and angles using the code snippet from above.
We can also cast a ray, and render the origin of the intersection between the ray and the entity's collider.