Small PCISPH changes

src/cuda/pcisph_kernels.cu

@@ -140,7 +140,7 @@ __global__ void updatePressures(
 
     if (idx < numParticles) {
         float deltaP = -density_errors[idx] / A;
-        pressure_increments[idx] += deltaP;
+        pressure_increments[idx] = deltaP;
     }
 }
 

src/cuda/pcisph_update.cu

@@ -101,7 +101,7 @@ void updateParticles(float deltaTime)
 
     // ------------ Iterative Pressure Correction Loop --------------------
 
-    const int maxIterations = 5;
+    const int maxIterations = 3;
 
     for (int iter = 0; iter < maxIterations; ++iter) {
     // Launch the boundary correction kernel

src/settings/constants.h

@@ -12,7 +12,7 @@ const float h_BOUND_Z_MAX = 4.0f;
 const float h_GAS_CONSTANT = 0.02f;
 const float h_VISCOSITY = 0.04f;
 
-const float h_PARTICLE_MASS = 0.04f;
+const float h_PARTICLE_MASS = 0.01f;
 const float h_REST_DENSITY = 800.0f;
 
 const float h_PI = 3.14159265358979323846f;