Use 'purchase a license' in trial messages

Update trial/limit messaging across codebase to prompt users to "purchase a license" instead of "upgrade to the Standard Version" (src/radarsimpy/lib/cp_radarsimc.pyx, src/radarsimpy/simulator_radar.pyx, src/radarsimpy/simulator_rcs.pyx). Also remove the deprecated frame_time and interf_frame_time parameters (and their deprecation warning) from sim_radar, and do a small cleanup in cp_radarsimc (removed an unused commented variable).

Author: zpeng

src/radarsimpy/lib/cp_radarsimc.pyx

@@ -87,7 +87,7 @@ cdef inline void _validate_mesh_for_free_tier(int_t num_faces) except *:
             f"Your model: {num_faces} faces\n"
             f"Reduction needed: {num_faces - MAX_FREE_TIER_FACES} faces\n\n"
             f"This limitation helps maintain reasonable simulation times in the trial version.\n"
-            f"To simulate larger meshes, please upgrade to the Standard Version:\n"
+            f"To simulate larger meshes, please purchase a license:\n"
             f"→ https://radarsimx.com/product/radarsimpy/\n"
             f"{'='*60}\n"
         )
@@ -384,7 +384,7 @@ cdef void cp_AddRxChannel(rx, rx_idx, Receiver[float_t] * rx_c):
 
     polar = rx.rxchannel_prop["polarization"][rx_idx]
     cdef Vec3[cpp_complex[float_t]] polarization_vt = Vec3[cpp_complex[float_t]](cpp_complex[float_t](np.real(polar[0]), np.imag(polar[0])), cpp_complex[float_t](np.real(polar[1]), np.imag(polar[1])), cpp_complex[float_t](np.real(polar[2]), np.imag(polar[2])))
-    # cdef float_t[:] polarization_mv = rx.rxchannel_prop["polarization"][rx_idx].astype(np_float)
+
     rx_c[0].AddChannel(
         Vec3[float_t](&location_mv[0]),
         polarization_vt,

src/radarsimpy/simulator_radar.pyx

@@ -90,7 +90,7 @@ cdef inline void validate_free_tier_limits(radar, list targets):
             "----------------------------------------\n"
             "Current limitation: Maximum 2 targets\n"
             "Your scene: {} targets\n\n"
-            "To simulate more targets, please upgrade to the Standard Version:\n"
+            "To simulate more targets, please purchase a license:\n"
             "→ https://radarsimx.com/product/radarsimpy/\n"
             .format(len(targets))
         )
@@ -101,7 +101,7 @@ cdef inline void validate_free_tier_limits(radar, list targets):
             "----------------------------------------------\n"
             "Current limitation: 1 transmitter channel\n"
             "Your configuration: {} channels\n\n"
-            "To use multiple transmitter channels, please upgrade to the Standard Version:\n"
+            "To use multiple transmitter channels, please purchase a license:\n"
             "→ https://radarsimx.com/product/radarsimpy/\n"
             .format(radar.radar_prop["transmitter"].txchannel_prop["size"])
         )
@@ -112,7 +112,7 @@ cdef inline void validate_free_tier_limits(radar, list targets):
             "-------------------------------------------\n"
             "Current limitation: 1 receiver channel\n"
             "Your configuration: {} channels\n\n"
-            "To use multiple receiver channels, please upgrade to the Standard Version:\n"
+            "To use multiple receiver channels, please purchase a license:\n"
             "→ https://radarsimx.com/product/radarsimpy/\n"
             .format(radar.radar_prop["receiver"].rxchannel_prop["size"])
         )
@@ -142,7 +142,7 @@ cdef inline raise_err(RadarSimErrorCode err):
 @cython.cdivision(True)
 @cython.boundscheck(False)
 @cython.wraparound(False)
-cpdef sim_radar(radar, targets, frame_time=None, density=1, level=None, interf=None, interf_frame_time=None,
+cpdef sim_radar(radar, targets, density=1, level=None, interf=None,
                 ray_filter=None, back_propagating=False, device="gpu", log_path=None, debug=False):
     """
     sim_radar(radar, targets, density=1, level=None, interf=None, ray_filter=None,
@@ -301,18 +301,6 @@ cpdef sim_radar(radar, targets, frame_time=None, density=1, level=None, interf=N
     #----------------------
     # Initialization
     #----------------------
-    # Check for deprecated frame_time parameter
-    if frame_time is not None or interf_frame_time is not None:
-        import warnings
-        warnings.warn(
-            "The 'frame_time' and 'interf_frame_time' parameters in sim_radar() have been moved to the Radar constructor and are no longer used here. "
-            "These parameters will be ignored. Please set frame_time and interf_frame_time when creating the Radar object: "
-            "Radar(transmitter, receiver, frame_time=your_value). "
-            "These parameters will be removed in a future version.",
-            DeprecationWarning,
-            stacklevel=2
-        )
-
     # Validate free tier limitations
     validate_free_tier_limits(radar, targets)
 

src/radarsimpy/simulator_rcs.pyx

@@ -131,7 +131,7 @@ cpdef sim_rcs(
                 "Current limitation: Maximum 3 targets\n"
                 "Your scene: {} targets\n\n"
                 "This limitation helps maintain reasonable simulation times in the trial version.\n"
-                "To simulate more targets, please upgrade to the Standard Version:\n"
+                "To simulate more targets, please purchase a license:\n"
                 "→ https://radarsimx.com/product/radarsimpy/\n"
                 .format(len(targets))
             )