ALS technical notes: Difference between revisions

ALS technical notes (view source)

747 bytes removed , 3 August 2018

Quoting GLSL shader code in the Wiki is too detailed (and misleading, generally people expect copy/pastable examples).

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 Up to inner_angle, the light will have full intensity. From inner to outer angle the light will linearly fade to outer_gain. From outer angle to zero angle, the light intensity will linearly fade to zero.
-'''Note:''' To better explain the relation of the variables ''inner_angle'', ''outer_angle'' and ''zero angle'', this is the algorithm that produces the scalar value ''directional_fade'' from which the intensity value is defined in the shaders file ''light-ALS.frag'':
-<syntaxhighlight lang="xml">
-float directional_fade (in float direction) {
-  float arg = clamp(direction, 0.0, 1.0);
-  float ia = (1.0 - inner_angle);
-  float oa = (1.0 - outer_angle);
-  float za = (1.0 - zero_angle);
-  if (direction > ia) {return 1.0;}
-  else if (direction > oa)
-	{return outer_gain + (1.0-outer_gain) * (direction - oa) / (ia - oa);}
-  else if (direction > za)
-	{return outer_gain * (direction - za) / (oa - za);}
-  else {return 0.0;}
-}
-</syntaxhighlight>
 ====Strobe effect====