Rename some glsl variables and functions

examples/webgl_raymarching_reflect.html

@@ -58,7 +58,7 @@
 			const vec3 lightDir = vec3( -0.48666426339228763, 0.8111071056538127, -0.3244428422615251 );
 
 			// distance functions
-			vec3 onRep( vec3 p, float interval ) {
+			vec3 opRep( vec3 p, float interval ) {
 
 				vec2 q = mod( p.xz, interval ) - interval * 0.5;
 				return vec3( q.x, p.y, q.y );
@@ -67,7 +67,7 @@
 
 			float sphereDist( vec3 p, float r ) {
 
-				return length( onRep( p, 3.0 ) ) - r;
+				return length( opRep( p, 3.0 ) ) - r;
 
 			}
 
@@ -159,18 +159,18 @@
 
 			}
 
-			vec3 getRayColor( vec3 origin, vec3 ray, out vec3 p, out vec3 normal, out bool hit ) {
+			vec3 getRayColor( vec3 origin, vec3 ray, out vec3 pos, out vec3 normal, out bool hit ) {
 
 				// marching loop
 				float dist;
 				float depth = 0.0;
-				p = origin;
+				pos = origin;
 
 				for ( int i = 0; i < 64; i++ ){
 
-					dist = sceneDist( p );
+					dist = sceneDist( pos );
 					depth += dist;
-					p = origin + depth * ray;
+					pos = origin + depth * ray;
 
 					if ( abs(dist) < EPS ) break;
 
@@ -181,11 +181,11 @@
 
 				if ( abs(dist) < EPS ) {
 
-					normal = getNormal(p);
+					normal = getNormal(pos);
 					float diffuse = clamp( dot( lightDir, normal ), 0.1, 1.0 );
 					float specular = pow( clamp( dot( reflect( lightDir, normal ), ray ), 0.0, 1.0 ), 10.0 );
-					float shadow = getShadow( p + normal * OFFSET, lightDir );
-					color = ( sceneColor( p ).rgb * diffuse + vec3( 0.8 ) * specular ) * max( 0.5, shadow );
+					float shadow = getShadow( pos + normal * OFFSET, lightDir );
+					color = ( sceneColor( pos ).rgb * diffuse + vec3( 0.8 ) * specular ) * max( 0.5, shadow );
 
 					hit = true;
 
@@ -212,16 +212,16 @@
 				vec3 cPos = cameraPosition;
 
 				vec3 color = vec3( 0.0 );
-				vec3 p, normal;
+				vec3 pos, normal;
 				bool hit;
 				float alpha = 1.0;
 
 				for ( int i = 0; i < 3; i++ ) {
 
-					color += alpha * getRayColor( cPos, ray, p, normal, hit );
+					color += alpha * getRayColor( cPos, ray, pos, normal, hit );
 					alpha *= 0.3;
 					ray = normalize( reflect( ray, normal ) );
-					cPos = p + normal * OFFSET;
+					cPos = pos + normal * OFFSET;
 
 					if ( !hit ) break;