Fixed barriers in sph simulation

Signed-off-by: Tobias Frisch <tfrisch@uni-koblenz.de>

projects/sph/shaders/force.comp

@@ -80,6 +80,7 @@ void main() {
     particle_data[gl_LocalInvocationIndex].pressure = inParticle[id].pressure;
 
     memoryBarrierShared();
+    barrier();
 
     const float h6 = pow(h, 6);
     externalForce = particle_data[gl_LocalInvocationIndex].density * gravity * vec3(-gravityDir.x,gravityDir.y,gravityDir.z);

projects/sph/shaders/pressure.comp

@@ -63,6 +63,7 @@ void main() {
     position_data[gl_LocalInvocationIndex] = inParticle[id].position;
 
     memoryBarrierShared();
+    barrier();
 
     for(uint j = 1; j < gl_WorkGroupSize.x; j++) {
         uint i = (gl_LocalInvocationIndex + j) % gl_WorkGroupSize.x;