Redconstruct from Depth Buffer

Fragment:

// uClipPlaneConstants.x => uClipPlaneNear*uClipPlaneFar
// uClipPlaneConstants.y => uClipPlaneFar-uClipPlaneNear
// uClipPlaneConstants.z => uClipPlaneFar
uniform vec3 uClipPlaneConstants;
vec3 vertexViewSpace=vec3(vViewRayDirection.xy*(1.0/vViewRayDirection.z),1.0)*
                     (uClipPlaneConstants.x/((texture2D(uTexDepth,vTexCoord).x*uClipPlaneConstants.y)-uClipPlaneConstants.z));

Vertex:

vViewRayDirection=(uInverseProjectionMatrix*vec4(gl_Position.xy,0.0,1.0)).xyz;