Add "Gravity Field" effect

GSChaos/CChaos.cpp

@@ -92,6 +92,7 @@ void CChaos::FeatureInit()
 	RegisterChaosFeature<CFeatureUpsideDown>();
 	RegisterChaosFeature<CFeatureNPCExplode>();
 	RegisterChaosFeature<CFeatureJeepy>();
+	RegisterChaosFeature<CFeatureGravityField>();
 
 	RegisterChaosFeature<CFeatureCombineEffects>(); // must be last!!!
 

GSChaos/CFeatureGravityField.cpp

@@ -0,0 +1,68 @@
+#include "includes.h"
+
+// From engine's mathlib.c
+float Length(const vec3_t v)
+{
+	int i;
+	float length;
+
+	length = 0;
+	for (i = 0; i < 3; i++)
+		length += v[i] * v[i];
+	length = static_cast<float>(sqrt(length)); // FIXME
+
+	return length;
+}
+
+void CFeatureGravityField::Init()
+{
+	CChaosFeature::Init();
+}
+
+void CFeatureGravityField::ActivateFeature()
+{
+	CChaosFeature::ActivateFeature();
+	m_bActivated = true;
+}
+
+void CFeatureGravityField::DeactivateFeature()
+{
+	CChaosFeature::DeactivateFeature();
+	m_bActivated = false;
+}
+
+void CFeatureGravityField::OnFrame(double time)
+{
+	if (!m_bActivated)
+		return;
+
+	if (CLWrapper::GetPausedState())
+		return;
+
+	// point of no return
+	edict_t* e;
+	for (int i = 1; i < sv->num_edicts; i++)
+	{
+		e = ORIG_EDICT_NUM(i);
+		if (e && !e->free)
+		{
+			if (e->v.flags & FL_CLIENT)
+				continue;
+
+			(*sv_player)->v.flags |= FL_GODMODE; // this effect is too crazy for player's health :DDD
+
+			Vector target = (*sv_player)->v.origin - e->v.origin;
+
+			float distance = Length(target);
+			Vector direction = target / distance;
+			Vector velocity = direction * MAGNET_SPEED;
+
+			e->v.velocity = velocity;
+		}
+	}
+}
+
+const char* CFeatureGravityField::GetFeatureName()
+{
+	return "Hyper Gravity Field";
+}

GSChaos/CFeatureGravityField.h

@@ -0,0 +1,42 @@
+/**
+ * Copyright - ScriptedSnark, 2024.
+ * CFeatureGravityField.h
+ *
+ * Project (GSChaos) header file
+ * Authors: ScriptedSnark.
+ * Do not delete this comment block. Respect others' work!
+ */
+
+#ifdef CFEATUREGRAVITYFIELD_H_RECURSE_GUARD
+#error Recursive header files inclusion detected in CFeatureGravityField.h
+#else //CFEATUREGRAVITYFIELD_H_RECURSE_GUARD
+
+#define CFEATUREGRAVITYFIELD_H_RECURSE_GUARD
+
+#ifndef CFEATUREGRAVITYFIELD_H_GUARD
+#define CFEATUREGRAVITYFIELD_H_GUARD
+#pragma once
+
+#ifdef __cplusplus
+
+#define MAGNET_SPEED 1500.0f
+
+class CFeatureGravityField : public CChaosFeature
+{
+	void Init() override;
+	void ActivateFeature() override;
+	void DeactivateFeature() override;
+	void OnFrame(double time) override;
+	const char* GetFeatureName() override;
+private:
+	bool m_bActivated;
+};
+
+#else //!__cplusplus
+#error C++ compiler required to compile CFeatureGravityField.h
+#endif //__cplusplus
+
+#endif //CFEATUREGRAVITYFIELD_H_GUARD
+
+#undef CFEATUREGRAVITYFIELD_H_RECURSE_GUARD
+#endif //CFEATUREGRAVITYFIELD_H_RECURSE_GUARD

GSChaos/GSChaos.vcxproj

@@ -127,6 +127,7 @@
     <ClCompile Include="CFeatureGiveGauss.cpp" />
     <ClCompile Include="CFeatureGlobalGodMode.cpp" />
     <ClCompile Include="CFeatureGodMode.cpp" />
+    <ClCompile Include="CFeatureGravityField.cpp" />
     <ClCompile Include="CFeatureGrieferShephard.cpp" />
     <ClCompile Include="CFeatureGruntAmbush.cpp" />
     <ClCompile Include="CFeatureGTA2Camera.cpp" />
@@ -199,6 +200,7 @@
     <ClInclude Include="CFeatureGiveGauss.h" />
     <ClInclude Include="CFeatureGlobalGodMode.h" />
     <ClInclude Include="CFeatureGodMode.h" />
+    <ClInclude Include="CFeatureGravityField.h" />
     <ClInclude Include="CFeatureGrieferShephard.h" />
     <ClInclude Include="CFeatureGruntAmbush.h" />
     <ClInclude Include="CFeatureGTA2Camera.h" />

GSChaos/GSChaos.vcxproj.filters

@@ -164,6 +164,9 @@
     <ClCompile Include="..\external\imgui\backends\imgui_impl_opengl3.cpp">
       <Filter>ImGUI</Filter>
     </ClCompile>
+    <ClCompile Include="CFeatureGravityField.cpp">
+      <Filter>Effects</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="includes.h" />
@@ -386,6 +389,9 @@
     <ClInclude Include="..\external\imgui\backends\imgui_impl_opengl3.h">
       <Filter>ImGUI</Filter>
     </ClInclude>
+    <ClInclude Include="CFeatureGravityField.h">
+      <Filter>Effects</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <Filter Include="Hooking">

GSChaos/includes.h

@@ -127,6 +127,7 @@ extern bool g_bEncrypted;
 #include "CFeatureUpsideDown.h"
 #include "CFeatureNPCExplode.h"
 #include "CFeatureJeepy.h"
+#include "CFeatureGravityField.h"
 
 #include "CFeatureCombineEffects.h"
 //========================

README.md

@@ -56,6 +56,7 @@ Additional info:
 > Upside Down
 > Every NPC explodes
 > Let's see Jeepy's lasagna
+> Hyper Gravity Field
 > Combine Effects ( 3 in 1 )
 ```