Backface Culling is an important part of how a 3D engine performs visibility checks for example to create a 3D configurator. The purpose is to detect polygons that are invisible in a particular scene - that is, polygons that point away from the viewer. Recognizing backward-facing polygons allows us to eliminate them from an [...]
Clipping in the context of computer graphics is a method to selectively enable or disable rendering operations within a defined range of interest. Mathematically, clipping can be described with the terminology of constructive geometry. A rendering algorithm draws only pixels at the intersection between the clip area and the scene model (for example 3D [...]
The Warnock algorithm is a hidden surface algorithm developed by John Warnock that is classically used in graphics (for example to create a 3D configurator). It explains the problems of displaying a difficult image by recursively subdividing a view until areas are reached that are trivial to evaluate. If the view is easy to [...]
The Painter's algorithm, also known as Priority Fill, is one of the simplest solutions to the visibility problem in 3D computer graphics for example to create a error-free 3D configurator. When projecting a 3D scene onto a 2D plane, it is eventually necessary to decide which polygons are visible and which are hidden. [...]
This article deals with overcoming the unconscious boundaries that are often set in a project to create a 3D configurator. It then describes the various techniques that John Cormack has used to develop his Visible Surface Determination (VSD) and Culling (VSD) algorithms in Quake. This includes a description of the potentially visible set (PVS), [...]
In the following article we would like to go a little deeper into the so-called "Quake Hidden Surface Removal". It often plays an important role in 3D configurator projects. Moving objects and Z-buffers. We start with a few remarks about the problems with moving objects (billboards/sprites, BSP [...]
A buffer resource is a collection of fully typed data grouped into elements. You can use buffers to store a variety of data, including position vectors, normal vectors, texture coordinates in a vertex buffer, indexes in an index buffer, or device state. A buffer element consists of 1 to 4 components. Buffer elements can [...]
Z-Fighting, also called stitching, is a phenomenon in 3D rendering that occurs when two or more primitives have similar or identical values in the Z buffer. It is particularly common in coplanar polygons where two faces occupy substantially the same space without either face being in front. Affected pixels are rendered with fragments of [...]
We wrote this article to help you understand how things are displayed on screen and how transparency is handled in BabylonJS to create a 3D configurator in real time. General order. A general rule of thumb for real-time 3D rendering is that drawing [...]
Foreground Alpha is a rendering mode that sets the Alpha (Opacity) pixel depending on whether the pixel is considered to be in the foreground or background of the scene (for example to create a 3D configurator). If you enable Foreground Alpha, when you save your image in PNG, EXR, or any other format that [...]
