Merge branch 'change-const-to-constexpr' into 'master'

change const to constexpr

Closes #6797

See merge request OpenMW/openmw!2630

components/misc/constants.hpp

@@ -7,25 +7,25 @@ namespace Constants
 {
 
     // The game uses 64 units per yard
-    const float UnitsPerMeter = 69.99125109f;
-    const float UnitsPerFoot = 21.33333333f;
+    constexpr float UnitsPerMeter = 69.99125109f;
+    constexpr float UnitsPerFoot = 21.33333333f;
 
     // Sound speed in meters per second
-    const float SoundSpeedInAir = 343.3f;
-    const float SoundSpeedUnderwater = 1484.0f;
+    constexpr float SoundSpeedInAir = 343.3f;
+    constexpr float SoundSpeedUnderwater = 1484.0f;
 
-    // Gravity constant in m/sec^2
+    // Gravity constexprant in m/sec^2
     // Note: 8.96 m/sec^2 = 9.8 yards/sec^2
     // Probaly original engine's developers just forgot
     // that their engine uses yards instead of meters
     // and used standart gravity value as it is
-    const float GravityConst = 8.96f;
+    constexpr float GravityConst = 8.96f;
 
     // Size of one exterior cell in game units
-    const int CellSizeInUnits = 8192;
+    constexpr int CellSizeInUnits = 8192;
 
     // Size of active cell grid in cells (it is a square with the (2 * CellGridRadius + 1) cells side)
-    const int CellGridRadius = 1;
+    constexpr int CellGridRadius = 1;
 
     // A label to mark night/day visual switches
     const std::string NightDayLabel = "NightDaySwitch";
@@ -34,7 +34,7 @@ namespace Constants
     const std::string HerbalismLabel = "HerbalismSwitch";
 
     // Percentage height at which projectiles are spawned from an actor
-    const float TorsoHeight = 0.75f;
+    constexpr float TorsoHeight = 0.75f;
 
     static constexpr float sStepSizeUp = 34.0f;
     static constexpr float sMaxSlope = 46.0f;