Fix trapezoid construction for negative phi and older Geant4

app/celer-sim/simple-driver.py

@@ -146,8 +146,9 @@ def strtobool(text):
 time = run_output['time'].copy()
 steps = time.pop('steps')
 if use_device:
-    assert(len(steps) == run_output['num_step_iterations'][0])
+    assert steps
+    assert len(steps[0]) == run_output['num_step_iterations'][0]
 else:
     # Step times disabled on CPU from input
-    assert(steps is None)
+    assert steps is None
 print(json.dumps(time, indent=1))

src/orange/g4org/SolidConverter.cc

@@ -114,9 +114,8 @@ SolidEnclosedAngle get_polar_wedge(S const& solid)
     CELER_EXPECT(
         is_soft_unit_vector(Array<double, 3>{axis.x(), axis.y(), axis.z()}));
 
-    double const theta = 1 / std::cos(axis.z());
-    double const phi = std::atan2(axis.x() / axis.z(), axis.y() / axis.z());
-
+    double const theta = std::acos(axis.z());
+    double const phi = std::atan2(axis.y(), axis.x());
     return {native_value_to<Turn>(theta), native_value_to<Turn>(phi)};
 }
 

src/orange/orangeinp/ConvexRegion.cc

@@ -35,7 +35,6 @@ namespace orangeinp
 {
 namespace
 {
-using Real2 = Array<real_type, 2>;
 //---------------------------------------------------------------------------//
 /*!
  * Create a z-aligned bounding box infinite along z and symmetric in r.
@@ -356,9 +355,6 @@ GenTrap GenTrap::from_trap(
     CELER_VALIDATE(theta >= zero_quantity() && theta < Turn{0.25},
                    << "invalid angle " << theta.value()
                    << " [turns]: must be in the range [0, 0.25)");
-    CELER_VALIDATE(phi >= zero_quantity() && phi < Turn{1.},
-                   << "invalid angle " << phi.value()
-                   << " [turns]: must be in the range [0, 1)");
 
     // Calculate offset of faces from z axis
     auto [dxdz_hz, dydz_hz] = [&]() -> std::pair<real_type, real_type> {

test/orange/g4org/SolidConverter.test.cc

@@ -453,6 +453,25 @@ TEST_F(SolidConverterTest, trap)
                           {1.20, 1.94, -4.01},
                           {-0.81, 1.9, -4.01},
                           {-1.96, -2.94, 4.01}});
+    tan_alpha = std::tan(30 * degree);
+    this->build_and_test(
+        G4Trap("trap",
+               10,
+               10 * degree,
+               -15 * degree,
+               20,
+               10,
+               10,
+               tan_alpha,
+               30,
+               15,
+               15,
+               tan_alpha),
+        R"json({"_type":"shape","interior":{"_type":"gentrap","halfheight":1.0,"lower":[[-2.325019322917132,-1.9543632192272244],[-0.32501932291713187,-1.9543632192272244],[1.9843817538413706,2.0456367807727753],[-0.01561824615862939,2.0456367807727753]],"upper":[[-3.061732023030996,-3.0456367807727753],[-0.06173202303099612,-3.0456367807727753],[3.4023695921067576,2.9543632192272247],[0.4023695921067574,2.9543632192272247]]},"label":"trap"})json",
+        {{-2.33, -1.96, -1.01},
+         {-2.32, -1.95, -0.99},
+         {3.41, 2.96, 1.01},
+         {3.40, 2.95, 0.99}});
 }
 
 TEST_F(SolidConverterTest, trd_box)