Definitions and declarations

Example:

//--------------------------------------------------------------//
// Definitions and declarations
//--------------------------------------------------------------//

#define BLACK   float4(0.0.xxx, 1.0)

#define HALF_PI 1.5707963
#define PI      3.1415927
#define TWO_PI  6.2831853

float _OutputWidth;
float _OutputAspectRatio;

#define OUTPUT_HEIGHT (_OutputWidth / _OutputAspectRatio)

Definitions, which are already available by default for testing the operating system used,
can be found under “Special auto-synced parameters and definitions”

More definitions can be found in other code collections of this repository (for example, macros).