added FIXED_EQUIRECTANGULAR_MIRRORED_MODE

dist/preview release/what's new.md

@@ -17,6 +17,7 @@
  - All deprecated functions and properties were removed ([deltakosh](https://github.com/deltakosh))
 
 ### Updates
+- Added `FIXED_EQUIRECTANGULAR_MIRRORED_MODE` mode for reflection texture. [Demo here](http://www.babylonjs-playground.com/#11GAIH#22) ([deltakosh](https://github.com/deltakosh))
 - Introduced `boundingBox.centerWorld` and `boundingBox.extendSizeWorld` ([deltakosh](https://github.com/deltakosh))
 - Improved FXAA post-process ([deltakosh](https://github.com/deltakosh))
 - Added `Light.customProjectionMatrixBuilder` to allow developers to define their own projection matrix for shadows ([deltakosh](https://github.com/deltakosh))

src/Materials/Textures/babylon.texture.ts

@@ -14,6 +14,7 @@
         public static INVCUBIC_MODE = 6;
         public static EQUIRECTANGULAR_MODE = 7;
         public static FIXED_EQUIRECTANGULAR_MODE = 8;
+        public static FIXED_EQUIRECTANGULAR_MIRRORED_MODE = 9;
 
         public static CLAMP_ADDRESSMODE = 0;
         public static WRAP_ADDRESSMODE = 1;

src/Materials/babylon.pbrMaterial.ts

@@ -42,7 +42,9 @@
         public REFLECTIONMAP_PROJECTION = false;
         public REFLECTIONMAP_SKYBOX = false;
         public REFLECTIONMAP_EXPLICIT = false;
-        public REFLECTIONMAP_EQUIRECTANGULAR = false;
+        public REFLECTIONMAP_EQUIRECTANGULAR = false;        
+        public REFLECTIONMAP_EQUIRECTANGULAR_FIXED = false;
+        public REFLECTIONMAP_MIRROREDEQUIRECTANGULAR_FIXED = false;
         public INVERTCUBICMAP = false;
         public LOGARITHMICDEPTH = false;
         public CAMERATONEMAP = false;
@@ -739,6 +741,12 @@
                             case Texture.EQUIRECTANGULAR_MODE:
                                 this._defines.REFLECTIONMAP_EQUIRECTANGULAR = true;
                                 break;
+                            case Texture.FIXED_EQUIRECTANGULAR_MODE:
+                                this._defines.REFLECTIONMAP_EQUIRECTANGULAR_FIXED = true;
+                                break;
+                            case Texture.FIXED_EQUIRECTANGULAR_MIRRORED_MODE:
+                                this._defines.REFLECTIONMAP_MIRROREDEQUIRECTANGULAR_FIXED = true;
+                                break;                                
                         }
 
                         if (this.reflectionTexture instanceof HDRCubeTexture && (<HDRCubeTexture>this.reflectionTexture)) {

src/Materials/babylon.standardMaterial.ts

@@ -47,6 +47,7 @@ module BABYLON {
         public REFLECTIONMAP_EXPLICIT = false;
         public REFLECTIONMAP_EQUIRECTANGULAR = false;
         public REFLECTIONMAP_EQUIRECTANGULAR_FIXED = false;
+        public REFLECTIONMAP_MIRROREDEQUIRECTANGULAR_FIXED = false;
         public INVERTCUBICMAP = false;
         public LOGARITHMICDEPTH = false;
         public REFRACTION = false;
@@ -388,6 +389,9 @@ module BABYLON {
                             case Texture.FIXED_EQUIRECTANGULAR_MODE:
                                 this._defines.REFLECTIONMAP_EQUIRECTANGULAR_FIXED = true;
                                 break;
+                            case Texture.FIXED_EQUIRECTANGULAR_MIRRORED_MODE:
+                                this._defines.REFLECTIONMAP_MIRROREDEQUIRECTANGULAR_FIXED = true;
+                                break;
                         }
                     }
                 }

src/Shaders/ShadersInclude/reflectionFunction.fx

@@ -1,12 +1,16 @@
 vec3 computeReflectionCoords(vec4 worldPos, vec3 worldNormal)
 {
-#ifdef REFLECTIONMAP_EQUIRECTANGULAR_FIXED
+#if defined(REFLECTIONMAP_EQUIRECTANGULAR_FIXED) || defined(REFLECTIONMAP_MIRROREDEQUIRECTANGULAR_FIXED)
 	vec3 direction = normalize(vDirectionW);
 
 	float t = clamp(direction.y * -0.5 + 0.5, 0., 1.0);
 	float s = atan(direction.z, direction.x) * RECIPROCAL_PI2 + 0.5;
 
-	return vec3(s, t, 0);
+ 	#ifdef REFLECTIONMAP_MIRROREDEQUIRECTANGULAR_FIXED
+		return vec3(1.0 - s, t, 0);
+	#else
+		return vec3(s, t, 0);
+	#endif
 #endif
 
 #ifdef REFLECTIONMAP_EQUIRECTANGULAR

src/Shaders/default.fragment.fx

@@ -124,7 +124,7 @@ uniform sampler2D reflection2DSampler;
 #ifdef REFLECTIONMAP_SKYBOX
 varying vec3 vPositionUVW;
 #else
-#ifdef REFLECTIONMAP_EQUIRECTANGULAR_FIXED
+#if defined(REFLECTIONMAP_EQUIRECTANGULAR_FIXED) || defined(REFLECTIONMAP_MIRROREDEQUIRECTANGULAR_FIXED)
 varying vec3 vDirectionW;
 #endif
 

src/Shaders/default.vertex.fx

@@ -89,7 +89,7 @@ varying vec4 vColor;
 varying vec3 vPositionUVW;
 #endif
 
-#ifdef REFLECTIONMAP_EQUIRECTANGULAR_FIXED
+#if defined(REFLECTIONMAP_EQUIRECTANGULAR_FIXED) || defined(REFLECTIONMAP_MIRROREDEQUIRECTANGULAR_FIXED)
 varying vec3 vDirectionW;
 #endif
 
@@ -112,7 +112,7 @@ void main(void) {
 	vNormalW = normalize(vec3(finalWorld * vec4(normal, 0.0)));
 #endif
 
-#ifdef REFLECTIONMAP_EQUIRECTANGULAR_FIXED
+#if defined(REFLECTIONMAP_EQUIRECTANGULAR_FIXED) || defined(REFLECTIONMAP_MIRROREDEQUIRECTANGULAR_FIXED)
 	vDirectionW = normalize(vec3(finalWorld * vec4(position, 0.0)));
 #endif
 

src/Shaders/pbr.fragment.fx

@@ -135,7 +135,7 @@ uniform sampler2D reflection2DSampler;
 #ifdef REFLECTIONMAP_SKYBOX
 varying vec3 vPositionUVW;
 #else
-#ifdef REFLECTIONMAP_EQUIRECTANGULAR_FIXED
+#if defined(REFLECTIONMAP_EQUIRECTANGULAR_FIXED) || defined(REFLECTIONMAP_MIRROREDEQUIRECTANGULAR_FIXED)
 varying vec3 vDirectionW;
 #endif
 

src/Shaders/pbr.vertex.fx

@@ -92,7 +92,7 @@ varying vec4 vColor;
 varying vec3 vPositionUVW;
 #endif
 
-#ifdef REFLECTIONMAP_EQUIRECTANGULAR_FIXED
+#if defined(REFLECTIONMAP_EQUIRECTANGULAR_FIXED) || defined(REFLECTIONMAP_MIRROREDEQUIRECTANGULAR_FIXED)
 varying vec3 vDirectionW;
 #endif
 
@@ -115,7 +115,7 @@ void main(void) {
     vNormalW = normalize(vec3(finalWorld * vec4(normal, 0.0)));
 #endif
 
-#ifdef REFLECTIONMAP_EQUIRECTANGULAR_FIXED
+#if defined(REFLECTIONMAP_EQUIRECTANGULAR_FIXED) || defined(REFLECTIONMAP_MIRROREDEQUIRECTANGULAR_FIXED)
     vDirectionW = normalize(vec3(finalWorld * vec4(position, 0.0)));
 #endif