feat: add degToRad, radToDeg in glsl with unit tests

bhouston · Jul 29, 2020 · a6237eb · a6237eb
1 parent ff0e595
commit a6237eb
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Showing 2 changed files with 15 additions and 1 deletion.
diff --git a/src/lib/shaders/includes/math/math.glsl b/src/lib/shaders/includes/math/math.glsl
@@ -9,11 +9,13 @@ const float EPSILON = 1e-6;
 
 float saturate( const in float a ) { return clamp( a, 0., 1. ); }
 vec3 saturate( const in vec3 a ) { return clamp( a, 0., 1. ); }
-vec3 whiteComplement( const in vec3 a ) { return 1.0 - saturate(a); }
+vec3 whiteComplement( const in vec3 a ) { return 1. - saturate(a); }
 float pow2( const in float x ) { return x*x; }
 float pow3( const in float x ) { return x*x*x; }
 float pow4( const in float x ) { float x2 = x*x; return x2*x2; }
 float average( const in vec3 color ) { return dot( color, vec3( 0.333333333333 ) ); }
+float degToRad( const in float deg ) { return deg * PI / 180.; }
+float radToDeg( const in float rad ) { return rad * 180. / PI; }
 
 const float NAN = sqrt( 0. );
 bool isnan( const float x ) {

diff --git a/src/lib/shaders/includes/math/math.test.glsl b/src/lib/shaders/includes/math/math.test.glsl
@@ -41,4 +41,16 @@ void tests( inout TestSuite suite ) {
   // should be undefined according to spec: https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/atan.xhtml
   assert( suite, 126, atan( 1., 0. ) == PI_HALF );
 
+ assert( suite, 200, eqAbs( degToRad( 0. ), PI * 0., 0.000001 ) );
+ assert( suite, 201, eqAbs( degToRad( 90. ), PI * 0.5, 0.000001 ) );
+ assert( suite, 202, eqAbs( degToRad( 180. ), PI * 1., 0.000001 ) );
+ assert( suite, 203, eqAbs( degToRad( 270. ), PI * 1.5, 0.000001 ) );
+ assert( suite, 204, eqAbs( degToRad( 360. ), PI * 2., 0.000001 ) );
+
+ assert( suite, 205, eqAbs( radToDeg( degToRad( 0. ) ), 0., 0.000001 ) );
+ assert( suite, 206, eqAbs( radToDeg( degToRad( 90. ) ), 90., 0.000001 ) );
+ assert( suite, 207, eqAbs( radToDeg( degToRad( 180. ) ), 180., 0.000001 ) );
+ assert( suite, 208, eqAbs( radToDeg( degToRad( 270. ) ), 270., 0.000001 ) );
+ assert( suite, 209, eqAbs( radToDeg( degToRad( 360. ) ), 360., 0.000001 ) );
+
 }