feat: rename spherical to nzSpherical to reflect its polarity.

src/lib/shaders/includes/cubemaps/latLong.glsl

@@ -7,7 +7,7 @@
  * local direction -> equirectangular uvs
  */
 vec2 directionToLatLongUV( in vec3 dir ) {
-  vec2 s = cartesianToSpherical( dir );
+  vec2 s = cartesianToNZSpherical( dir );
 	return vec2(
 		fract( s.x * RECIPROCAL_PI2 + 0.75 ), // this makes maps -z dir to the center of the UV space.
 		s.y / PI) ;
@@ -20,5 +20,5 @@ vec3 latLongUvToDirection( in vec2 latLongUv ) {
   vec2 s = vec2(
     ( latLongUv.x - 0.75 ) * PI2,
     latLongUv.y * PI );
-  return sphericalToCartesian( s );
+  return nzSphericalToCartesian( s );
 }

src/lib/shaders/includes/math/spherical.glsl

@@ -1,14 +1,14 @@
 #pragma once
 
 // -z is spherical axis
-vec3 sphericalToCartesian( vec2 s ) {
+vec3 nzSphericalToCartesian( vec2 s ) {
   vec2 cs = cos( s );
   vec2 ss = sin( s );
 	return vec3( cs.x * ss.y, cs.y, ss.x * ss.y );
 }
 
 // -z is spherical axis
-vec2 cartesianToSpherical( vec3 dir ) {
+vec2 cartesianToNZSpherical( vec3 dir ) {
 	return vec2( atan( dir.z, dir.x ), acos( dir.y ) );
 }