Use vertex pulling for clouds

shader/shape/basic.vert

@@ -1,7 +1,5 @@
 #version 450 core
-//struct PosColNorm { vec4 pos;   vec4 norm;uint col; uint dummy; };
-struct PosColNorm { vec4 pos;  uint norm;uint col; };
-// I don't know if the dummy is necessary
+struct PosColNorm { vec4 pos; uint norm; uint col; };
 layout (std140, binding = 0) uniform TheMat { mat4 theMat; } ;
 layout (std430, binding = 3) readonly buffer Data { PosColNorm data[]; };
 layout (std430, binding = 4) readonly buffer Indices { uint indices[]; };
@@ -12,7 +10,6 @@ void main() {
   vPos = data[indices[gl_VertexID]].pos;
   vCol = unpackUnorm4x8(data[indices[gl_VertexID]].col);
   vNorm = unpackSnorm4x8(data[indices[gl_VertexID]].norm);
-  //vNorm = n *2 - vec4(1,1,1,1);
   gl_Position = theMat * vec4(vPos.xyz,1);
 }
 //layout (location = 0) in vec4 pos;