update vertical damping & add rigidbody:get_vdamping

src/logic/scripting/lua/libs/lib__rigidbody.cpp

@@ -62,6 +62,15 @@ static int l_set_gravity_scale(lua::State* L) {
 static int l_is_vdamping(lua::State* L) {
     if (auto entity = get_entity(L, 1)) {
         return lua::pushboolean(
+            L, entity->getRigidbody().hitbox.verticalDamping > 0.0
+        );
+    }
+    return 0;
+}
+
+static int l_get_vdamping(lua::State* L) {
+    if (auto entity = get_entity(L, 1)) {
+        return lua::pushnumber(
             L, entity->getRigidbody().hitbox.verticalDamping
         );
     }
@@ -70,7 +79,11 @@ static int l_is_vdamping(lua::State* L) {
 
 static int l_set_vdamping(lua::State* L) {
     if (auto entity = get_entity(L, 1)) {
-        entity->getRigidbody().hitbox.verticalDamping = lua::toboolean(L, 2);
+        if (lua::isboolean(L, 2)) {
+            entity->getRigidbody().hitbox.verticalDamping = lua::toboolean(L, 2);
+        } else {
+            entity->getRigidbody().hitbox.verticalDamping = lua::tonumber(L, 2);
+        }
     }
     return 0;
 }
@@ -144,6 +157,7 @@ const luaL_Reg rigidbodylib[] = {
     {"get_linear_damping", lua::wrap<l_get_linear_damping>},
     {"set_linear_damping", lua::wrap<l_set_linear_damping>},
     {"is_vdamping", lua::wrap<l_is_vdamping>},
+    {"get_vdamping", lua::wrap<l_get_vdamping>},
     {"set_vdamping", lua::wrap<l_set_vdamping>},
     {"is_grounded", lua::wrap<l_is_grounded>},
     {"is_crouching", lua::wrap<l_is_crouching>},

src/physics/Hitbox.hpp

@@ -54,7 +54,7 @@ struct Hitbox {
     glm::vec3 velocity;
     float linearDamping = 0.5;
     float friction = 1.0f;
-    bool verticalDamping = false;
+    float verticalDamping = 1.0f;
     bool grounded = false;
     float gravityScale = 1.0f;
     bool crouching = false;

src/physics/PhysicsSolver.cpp

@@ -86,8 +86,8 @@ void PhysicsSolver::step(
     }
     vel.x /= 1.0f + delta * linearDamping;
     vel.z /= 1.0f + delta * linearDamping;
-    if (hitbox.verticalDamping) {
-        vel.y /= 1.0f + delta * linearDamping;
+    if (hitbox.verticalDamping > 0.0f) {
+        vel.y /= 1.0f + delta * linearDamping * hitbox.verticalDamping;
     }
 
     AABB aabb;