random_chance opcode added

CHANGELOG.md

@@ -49,6 +49,7 @@
   - new opcode **2705 ([pick_random_int](https://library.sannybuilder.com/#/sa/math/2705))**
   - new opcode **2706 ([pick_random_float](https://library.sannybuilder.com/#/sa/math/2706))**
   - new opcode **2707 ([pick_random_text](https://library.sannybuilder.com/#/sa/math/2707))**
+  - new opcode **2708 ([random_chance](https://library.sannybuilder.com/#/sa/math/2708))**
 - new [MemoryOperations](https://github.com/cleolibrary/CLEO5/tree/master/cleo_plugins/MemoryOperations) plugin
   - memory related opcodes moved from CLEO core into separated plugin
   - validation of input and output parameters for all opcodes

cleo_plugins/Math/Math.cpp

@@ -65,6 +65,7 @@ class Math
         CLEO_RegisterOpcode(0x2705, opcode_2705); // pick_random_int
         CLEO_RegisterOpcode(0x2706, opcode_2706); // pick_random_float
         CLEO_RegisterOpcode(0x2707, opcode_2707); // pick_random_text
+        CLEO_RegisterOpcode(0x2708, opcode_2708); // random_chance
     }
 
     //0098=1,generate_random_float
@@ -577,4 +578,18 @@ class Math
         CLEO_SkipUnusedVarArgs(thread);
         return OR_CONTINUE;
     }
+
+    //2708=1,random_chance %1d%
+    static OpcodeResult WINAPI opcode_2708(CRunningScript* thread)
+    {
+        auto chance = OPCODE_READ_PARAM_FLOAT();
+
+        uniform_real_distribution<float> dist(0.0f, 100.0f); // 0.0 to 99.99(9)
+        auto random = dist(Instance.randomGenerator);
+
+        auto result = random < chance;
+
+        OPCODE_CONDITION_RESULT(result);
+        return OR_CONTINUE;
+    }
 } Instance;