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@section introduction Introduction @section introduction Introduction
During Google Summer of Code 2012, graphics code was separated into a subsy stem During Google Summer of Code 2012, graphics code was separated into a subsy stem
called Renderer (<code>src/core/renderer</code>). called Renderer (<code>src/core/renderer</code>).
Renderer is composed of interface classes abstracting away low-level graphi cs Renderer is composed of interface classes abstracting away low-level graphi cs
work, and backend classes either derived from or used by the interface clas ses. work, and backend classes either derived from or used by the interface clas ses.
This allows to change underlying implementation without rewriting drawing c ode. This allows to change underlying implementation without rewriting drawing c ode.
For example, we now have two sets of backend classes: GL1 and GL2. Which o ne For example, we now have two sets of backend classes: GL1 and GL2. Which o ne
us used is decided at startup without affecting drawing code. is used is decided at startup without affecting drawing code.
@section outline API outline @section outline API outline
@image html renderer-api-overview.png @image html renderer-api-overview.png
@subsection stelrenderer StelRenderer @subsection stelrenderer StelRenderer
The central class of the Renderer subsystem is StelRenderer. It constructs The central class of the Renderer subsystem is StelRenderer. It constructs
other graphics classes (textures, vertex and index buffers, etc.) and sets other graphics classes (textures, vertex and index buffers, etc.) and sets
graphics state (global color, depth test mode, etc.). It also handles drawi ng. graphics state (global color, depth test mode, etc.). It also handles drawi ng.
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