resolve bug explodeVolumeSmooth

include/Algo/Render/GL2/explodeVolumeRender.hpp

@@ -131,7 +131,7 @@ void ExplodeVolumeRender::updateSmooth(typename PFP::MAP& map, const VertexAttri
 			N.normalize();
 			normals.push_back(N);
 			a = e;
-			centerFace += positions[d];
+			centerFace += positions[a];
 			nbs++;
 		} while (a != d);
 
@@ -243,7 +243,7 @@ void ExplodeVolumeRender::updateSmooth(typename PFP::MAP& map, const VertexAttri
 			N.normalize();
 			normals.push_back(N);
 			a = e;
-			centerFace += positions[d];
+			centerFace += positions[a];
 			nbs++;
 		} while (a != d);
 

include/Utils/Shaders/shaderExplodeSmoothVolumes.frag

@@ -3,8 +3,8 @@
 uniform vec4 ambient;
 uniform vec4 backColor;
 
-VARYING_FRAG vec4 normalFS;
-VARYING_FRAG vec4 lightFS;
+VARYING_FRAG vec3 normalFS;
+VARYING_FRAG vec3 lightFS;
 VARYING_FRAG vec3 colorVert;