typo

epgpu.cu

@@ -61,7 +61,7 @@ __device__ inline mat3 operator*(const mat3& left, const mat3& right) {
 }
 
 __device__ inline double signeddistance(const vec3& planeNN, const vec3& planeP, const vec3& Q) {
-    vec3 PQ =  - planeP;
+    vec3 PQ = Q - planeP;
     return dot(PQ, planeNN);
 }