Add 'environment' flag to target APIs

Add a new boolean 'environment' parameter to target-related APIs and call sites. Updated the Cython .pxd declarations to include the environment flag after density, and modified cp_radarsimc.pyx and simulator_lidar.pyx to pass target.get("environment", False) when adding targets and computing RCS/lidar. Also updates the radarsimcpp submodule pointer to the new commit. The new flag defaults to False to preserve backward compatibility.

Author: rookiepeng

src/radarsimcpp

@@ -141,7 +141,8 @@ cdef extern from "targets_manager.hpp":
                const cpp_complex[T] & ep,     # Relative permittivity (material property)
                const cpp_complex[T] & mu,     # Relative permeability (material property)
                const bool & skip_diffusion,   # Skip diffusion calculation flag
-               const T & density) except +    # Ray density (0.0 uses global density)
+               const T & density,             # Ray density (0.0 uses global density)
+               const bool & environment) except +  # Environment flag for target
 
         void AddTargetSimple(const T * points,
                const int_t * cells,
@@ -152,7 +153,8 @@ cdef extern from "targets_manager.hpp":
                const Vec3[T] & rotation,
                const Vec3[T] & rotation_rate,
                const bool & skip_diffusion,   # Skip diffusion calculation flag
-               const T & density) except +    # Ray density (0.0 uses global density)
+               const T & density,             # Ray density (0.0 uses global density)
+               const bool & environment) except +  # Environment flag for target
 
 #------------------------------------------------------------------------------
 # Ray Tracing Primitives

src/radarsimpy/includes/radarsimc.pxd

@@ -678,7 +678,8 @@ cdef void cp_AddTarget(radar,
                            ep_c,
                            mu_c,
                            <bool> target.get("skip_diffusion", False),
-                           <float_t> target.get("density", 0.0))
+                           <float_t> target.get("density", 0.0),
+                           <bool> target.get("environment", False))
 
 @cython.cdivision(True)
 @cython.boundscheck(False)
@@ -765,4 +766,5 @@ cdef void cp_RCS_Target(target, mesh_module, TargetsManager[float_t] * targets_m
                            ep_c,
                            mu_c,
                            <bool> target.get("skip_diffusion", False),
-                           <float_t> target.get("density", 0.0))
+                           <float_t> target.get("density", 0.0),
+                           <bool> target.get("environment", False))

src/radarsimpy/lib/cp_radarsimc.pyx

@@ -144,7 +144,8 @@ cpdef sim_lidar(lidar, targets, frame_time=0):
                                     Vec3[float_t](&rotation_mv[0]),
                                     Vec3[float_t](&rotation_rate_mv[0]),
                                     <bool> targets[idx_c].get("skip_diffusion", False),
-                                    <float_t> targets[idx_c].get("density", 0.0))
+                                    <float_t> targets[idx_c].get("density", 0.0),
+                                    <bool> targets[idx_c].get("environment", False))
 
     # Lidar parameters
     cdef float_t[:] phi_mv = np.radians(np.array(lidar["phi"], dtype=np_float))