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diff --git a/game/client/hl2/c_energy_wave.cpp b/game/client/hl2/c_energy_wave.cpp
new file mode 100644
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--- /dev/null
+++ b/game/client/hl2/c_energy_wave.cpp
@@ -0,0 +1,416 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: Client's energy wave
+//
+// $Workfile:     $
+// $Date:         $
+//
+//-----------------------------------------------------------------------------
+// $Log: $
+//
+// $NoKeywords: $
+//=============================================================================//
+#include "cbase.h"
+#include "materialsystem/imaterialsystem.h"
+#include "materialsystem/imesh.h"
+#include "energy_wave_effect.h"
+#include "mathlib/vmatrix.h"
+#include "clienteffectprecachesystem.h"
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+CLIENTEFFECT_REGISTER_BEGIN( PrecacheEnergyWave )
+CLIENTEFFECT_MATERIAL( "effects/energywave/energywave" )
+CLIENTEFFECT_REGISTER_END()
+
+//-----------------------------------------------------------------------------
+// Energy Wave: 
+//-----------------------------------------------------------------------------
+
+class C_EnergyWave : public C_BaseEntity
+{
+public:
+	DECLARE_CLASS( C_EnergyWave, C_BaseEntity );
+	DECLARE_CLIENTCLASS();
+
+	C_EnergyWave();
+	~C_EnergyWave();
+
+	void PostDataUpdate( DataUpdateType_t updateType );
+	int	DrawModel( int flags );
+	void ComputePoint( float s, float t, Vector& pt, Vector& normal, float& opacity );
+	void DrawWireframeModel( );
+
+	CEnergyWaveEffect m_EWaveEffect;
+
+	IMaterial* m_pWireframe;
+	IMaterial* m_pEWaveMat;
+
+private:
+	C_EnergyWave( const C_EnergyWave & ); // not defined, not accessible
+
+	void ComputeEWavePoints( Vector* pt, Vector* normal, float* opacity );
+	void DrawEWavePoints(Vector* pt, Vector* normal, float* opacity);
+
+};
+
+
+EXTERN_RECV_TABLE(DT_BaseEntity);
+
+IMPLEMENT_CLIENTCLASS_DT(C_EnergyWave, DT_EWaveEffect, CEnergyWave)
+END_RECV_TABLE()
+
+
+// ----------------------------------------------------------------------------
+// Functions.
+// ----------------------------------------------------------------------------
+
+C_EnergyWave::C_EnergyWave() : m_EWaveEffect(NULL, NULL)
+{
+	m_pWireframe = materials->FindMaterial("shadertest/wireframevertexcolor", TEXTURE_GROUP_OTHER);
+	m_pEWaveMat  = materials->FindMaterial("effects/energywave/energywave", TEXTURE_GROUP_CLIENT_EFFECTS);
+	m_EWaveEffect.Spawn();
+}
+
+C_EnergyWave::~C_EnergyWave()
+{
+}
+
+void C_EnergyWave::PostDataUpdate( DataUpdateType_t updateType )
+{
+	MarkMessageReceived();
+
+	// Make sure that origin points to current origin, at least
+	MoveToLastReceivedPosition();
+}
+
+
+
+enum
+{
+	NUM_SUBDIVISIONS = 21,
+};
+
+
+static void ComputeIndices( int is, int it, int* idx )
+{
+	int is0 = (is > 0) ? (is - 1) : is;
+	int it0 = (it > 0) ? (it - 1) : it;
+	int is1 = (is < EWAVE_NUM_HORIZONTAL_POINTS - 1) ? is + 1 : is;
+	int it1 = (it < EWAVE_NUM_HORIZONTAL_POINTS - 1) ? it + 1 : it;
+	int is2 = is + 2; 
+	int it2 = it + 2;
+	if (is2 >= EWAVE_NUM_HORIZONTAL_POINTS)
+		is2 = EWAVE_NUM_HORIZONTAL_POINTS - 1;
+	if (it2 >= EWAVE_NUM_HORIZONTAL_POINTS)
+		it2 = EWAVE_NUM_HORIZONTAL_POINTS - 1;
+
+	idx[0] = is0 + it0 * EWAVE_NUM_HORIZONTAL_POINTS;
+	idx[1] = is  + it0 * EWAVE_NUM_HORIZONTAL_POINTS;
+	idx[2] = is1 + it0 * EWAVE_NUM_HORIZONTAL_POINTS;
+	idx[3] = is2 + it0 * EWAVE_NUM_HORIZONTAL_POINTS;
+
+	idx[4] = is0 + it * EWAVE_NUM_HORIZONTAL_POINTS;
+	idx[5] = is  + it * EWAVE_NUM_HORIZONTAL_POINTS;
+	idx[6] = is1 + it * EWAVE_NUM_HORIZONTAL_POINTS;
+	idx[7] = is2 + it * EWAVE_NUM_HORIZONTAL_POINTS;
+
+	idx[8]  = is0 + it1 * EWAVE_NUM_HORIZONTAL_POINTS;
+	idx[9]  = is  + it1 * EWAVE_NUM_HORIZONTAL_POINTS;
+	idx[10] = is1 + it1 * EWAVE_NUM_HORIZONTAL_POINTS;
+	idx[11] = is2 + it1 * EWAVE_NUM_HORIZONTAL_POINTS;
+
+	idx[12] = is0 + it2 * EWAVE_NUM_HORIZONTAL_POINTS;
+	idx[13] = is  + it2 * EWAVE_NUM_HORIZONTAL_POINTS;
+	idx[14] = is1 + it2 * EWAVE_NUM_HORIZONTAL_POINTS;
+	idx[15] = is2 + it2 * EWAVE_NUM_HORIZONTAL_POINTS;
+}
+
+void C_EnergyWave::ComputePoint( float s, float t, Vector& pt, Vector& normal, float& opacity )
+{
+	int is = (int)s;
+	int it = (int)t;
+	if( is >= EWAVE_NUM_HORIZONTAL_POINTS )
+		is -= 1;
+
+	if( it >= EWAVE_NUM_VERTICAL_POINTS )
+		it -= 1;
+
+	int idx[16];
+	ComputeIndices( is, it, idx );
+
+	// The patch equation is:
+	// px = S * M * Gx * M^T * T^T 
+	// py = S * M * Gy * M^T * T^T 
+	// pz = S * M * Gz * M^T * T^T 
+	// where S = [s^3 s^2 s 1], T = [t^3 t^2 t 1]
+	// M is the patch type matrix, in my case I'm using a catmull-rom
+	// G is the array of control points. rows have constant t
+	static VMatrix catmullRom( -0.5, 1.5, -1.5, 0.5,
+								1, -2.5, 2, -0.5,
+								-0.5, 0, 0.5, 0,
+								0, 1, 0, 0 );
+
+	VMatrix controlPointsX, controlPointsY, controlPointsZ, controlPointsO;
+
+	Vector pos;
+	for (int i = 0; i < 4; ++i)
+	{
+		for (int j = 0; j < 4; ++j)
+		{
+			const Vector& v = m_EWaveEffect.GetPoint( idx[i * 4 + j] );
+
+			controlPointsX[j][i] = v.x;
+			controlPointsY[j][i] = v.y;
+			controlPointsZ[j][i] = v.z;
+
+			controlPointsO[j][i] = m_EWaveEffect.ComputeOpacity( v, GetAbsOrigin() );
+		}
+	}
+
+	float fs = s - is;
+	float ft = t - it;
+
+	VMatrix temp, mgm[4];
+	MatrixTranspose( catmullRom, temp );
+	MatrixMultiply( controlPointsX, temp, mgm[0] );
+	MatrixMultiply( controlPointsY, temp, mgm[1] );
+	MatrixMultiply( controlPointsZ, temp, mgm[2] );
+	MatrixMultiply( controlPointsO, temp, mgm[3] );
+
+	MatrixMultiply( catmullRom, mgm[0], mgm[0] );
+	MatrixMultiply( catmullRom, mgm[1], mgm[1] );
+	MatrixMultiply( catmullRom, mgm[2], mgm[2] );
+	MatrixMultiply( catmullRom, mgm[3], mgm[3] );
+
+	Vector4D svec, tvec;
+	float ft2 = ft * ft;
+	tvec[0] = ft2 * ft; tvec[1] = ft2; tvec[2] = ft; tvec[3] = 1.0f;
+
+ 	float fs2 = fs * fs;
+	svec[0] = fs2 * fs; svec[1] = fs2; svec[2] = fs; svec[3] = 1.0f;
+
+	Vector4D tmp;
+	Vector4DMultiply( mgm[0], tvec, tmp );
+	pt[0] = DotProduct4D( tmp, svec );
+	Vector4DMultiply( mgm[1], tvec, tmp );
+	pt[1] = DotProduct4D( tmp, svec );
+	Vector4DMultiply( mgm[2], tvec, tmp );
+	pt[2] = DotProduct4D( tmp, svec );
+
+	Vector4DMultiply( mgm[3], tvec, tmp );
+	opacity = DotProduct4D( tmp, svec );
+
+	if ((s == 0.0f) || (t == 0.0f) ||
+		(s == (EWAVE_NUM_HORIZONTAL_POINTS-1.0f)) || (t == (EWAVE_NUM_VERTICAL_POINTS-1.0f)) )
+	{
+		opacity = 0.0f;
+	}
+
+	if ((s <= 0.3) || (t < 0.3))
+	{
+		opacity *= 0.35f;
+	}
+	if ((s == (EWAVE_NUM_HORIZONTAL_POINTS-0.7f)) || (t == (EWAVE_NUM_VERTICAL_POINTS-0.7f)) )
+	{
+		opacity *= 0.35f;
+	}
+
+	if (opacity < 0.0f)
+		opacity = 0.0f;
+	else if (opacity > 255.0f)
+		opacity = 255.0f;
+
+	// Normal computation
+	Vector4D dsvec, dtvec;
+	dsvec[0] = 3.0f * fs2; dsvec[1] = 2.0f * fs; dsvec[2] = 1.0f; dsvec[3] = 0.0f;
+	dtvec[0] = 3.0f * ft2; dtvec[1] = 2.0f * ft; dtvec[2] = 1.0f; dtvec[3] = 0.0f;
+
+	Vector ds, dt;
+	Vector4DMultiply( mgm[0], tvec, tmp );
+	ds[0] = DotProduct4D( tmp, dsvec );
+	Vector4DMultiply( mgm[1], tvec, tmp );
+	ds[1] = DotProduct4D( tmp, dsvec );
+	Vector4DMultiply( mgm[2], tvec, tmp );
+	ds[2] = DotProduct4D( tmp, dsvec );
+
+	Vector4DMultiply( mgm[0], dtvec, tmp );
+	dt[0] = DotProduct4D( tmp, svec );
+	Vector4DMultiply( mgm[1], dtvec, tmp );
+	dt[1] = DotProduct4D( tmp, svec );
+	Vector4DMultiply( mgm[2], dtvec, tmp );
+	dt[2] = DotProduct4D( tmp, svec );
+
+	CrossProduct( ds, dt, normal );
+	VectorNormalize( normal );
+}
+
+void C_EnergyWave::DrawWireframeModel( )
+{
+	IMesh* pMesh = materials->GetDynamicMesh( true, NULL, NULL, m_pWireframe );
+
+	int numLines = (EWAVE_NUM_VERTICAL_POINTS - 1) * EWAVE_NUM_HORIZONTAL_POINTS +
+		EWAVE_NUM_VERTICAL_POINTS * (EWAVE_NUM_HORIZONTAL_POINTS - 1);
+
+	CMeshBuilder meshBuilder;
+	meshBuilder.Begin( pMesh, MATERIAL_LINES, numLines );
+
+	Vector tmp;
+	for (int i = 0; i < EWAVE_NUM_VERTICAL_POINTS; ++i)
+	{
+		for (int j = 0; j < EWAVE_NUM_HORIZONTAL_POINTS; ++j)
+		{
+			if ( i > 0 )
+			{
+				meshBuilder.Position3fv( m_EWaveEffect.GetPoint( j, i ).Base() );
+				meshBuilder.Color4ub( 255, 255, 255, 128 );
+				meshBuilder.AdvanceVertex();
+
+				meshBuilder.Position3fv( m_EWaveEffect.GetPoint( j, i - 1 ).Base() );
+				meshBuilder.Color4ub( 255, 255, 255, 128 );
+				meshBuilder.AdvanceVertex();
+			}
+
+			if (j > 0)
+			{
+				meshBuilder.Position3fv( m_EWaveEffect.GetPoint( j, i ).Base() );
+				meshBuilder.Color4ub( 255, 255, 255, 128 );
+				meshBuilder.AdvanceVertex();
+
+				meshBuilder.Position3fv( m_EWaveEffect.GetPoint( j - 1, i ).Base() );
+				meshBuilder.Color4ub( 255, 255, 255, 128 );
+				meshBuilder.AdvanceVertex();
+			}
+		}
+	}
+
+	meshBuilder.End();
+	pMesh->Draw();
+}
+
+//-----------------------------------------------------------------------------
+// Compute the ewave points using catmull-rom
+//-----------------------------------------------------------------------------
+
+void C_EnergyWave::ComputeEWavePoints( Vector* pt, Vector* normal, float* opacity )
+{
+	int i;
+	for ( i = 0; i < NUM_SUBDIVISIONS; ++i)
+	{
+		float t = (EWAVE_NUM_VERTICAL_POINTS -1 ) * (float)i / (float)(NUM_SUBDIVISIONS - 1);
+		for (int j = 0; j < NUM_SUBDIVISIONS; ++j)
+		{
+			float s = (EWAVE_NUM_HORIZONTAL_POINTS-1) * (float)j / (float)(NUM_SUBDIVISIONS - 1);
+			int idx = i * NUM_SUBDIVISIONS + j;
+
+			ComputePoint( s, t, pt[idx], normal[idx], opacity[idx] );
+		}
+	}
+}
+
+//-----------------------------------------------------------------------------
+// Draws the base ewave
+//-----------------------------------------------------------------------------
+
+#define TRANSITION_REGION_WIDTH 0.5f
+
+void C_EnergyWave::DrawEWavePoints(Vector* pt, Vector* normal, float* opacity)
+{
+	IMesh* pMesh = materials->GetDynamicMesh( true, NULL, NULL, m_pEWaveMat );
+
+	int numTriangles = (NUM_SUBDIVISIONS - 1) * (NUM_SUBDIVISIONS - 1) * 2;
+
+	CMeshBuilder meshBuilder;
+	meshBuilder.Begin( pMesh, MATERIAL_TRIANGLES, numTriangles );
+
+	float du = 1.0f / (float)(NUM_SUBDIVISIONS - 1);
+	float dv = du;
+
+	unsigned char color[3];
+	color[0] = 255;
+	color[1] = 255;
+	color[2] = 255;
+
+	for ( int i = 0; i < NUM_SUBDIVISIONS - 1; ++i)
+	{
+		float v = i * dv;
+		for (int j = 0; j < NUM_SUBDIVISIONS - 1; ++j)
+		{
+			int idx = i * NUM_SUBDIVISIONS + j;
+			float u = j * du;
+
+			meshBuilder.Position3fv( pt[idx].Base() );
+			meshBuilder.Color4ub( color[0], color[1], color[2], opacity[idx] );
+			meshBuilder.Normal3fv( normal[idx].Base() );
+			meshBuilder.TexCoord2f( 0, u, v );
+			meshBuilder.AdvanceVertex();
+
+			meshBuilder.Position3fv( pt[idx + NUM_SUBDIVISIONS].Base() );
+			meshBuilder.Color4ub( color[0], color[1], color[2], opacity[idx+NUM_SUBDIVISIONS] );
+			meshBuilder.Normal3fv( normal[idx + NUM_SUBDIVISIONS].Base() );
+			meshBuilder.TexCoord2f( 0, u, v + dv );
+			meshBuilder.AdvanceVertex();
+
+			meshBuilder.Position3fv( pt[idx + 1].Base() );
+			meshBuilder.Color4ub( color[0], color[1], color[2], opacity[idx+1] );
+			meshBuilder.Normal3fv( normal[idx+1].Base() );
+			meshBuilder.TexCoord2f( 0, u + du, v );
+			meshBuilder.AdvanceVertex();
+
+			meshBuilder.Position3fv( pt[idx + 1].Base() );
+			meshBuilder.Color4ub( color[0], color[1], color[2], opacity[idx+1] );
+			meshBuilder.Normal3fv( normal[idx+1].Base() );
+			meshBuilder.TexCoord2f( 0, u + du, v );
+			meshBuilder.AdvanceVertex();
+
+			meshBuilder.Position3fv( pt[idx + NUM_SUBDIVISIONS].Base() );
+			meshBuilder.Color4ub( color[0], color[1], color[2], opacity[idx+NUM_SUBDIVISIONS] );
+			meshBuilder.Normal3fv( normal[idx + NUM_SUBDIVISIONS].Base() );
+			meshBuilder.TexCoord2f( 0, u, v + dv );
+			meshBuilder.AdvanceVertex();
+
+			meshBuilder.Position3fv( pt[idx + NUM_SUBDIVISIONS + 1].Base() );
+			meshBuilder.Color4ub( color[0], color[1], color[2], opacity[idx+NUM_SUBDIVISIONS+1] );
+			meshBuilder.Normal3fv( normal[idx + NUM_SUBDIVISIONS + 1].Base() );
+			meshBuilder.TexCoord2f( 0, u + du, v + dv );
+			meshBuilder.AdvanceVertex();
+		}
+	}
+
+	meshBuilder.End();
+	pMesh->Draw();
+}
+
+//-----------------------------------------------------------------------------
+// Main draw entry point
+//-----------------------------------------------------------------------------
+
+int	C_EnergyWave::DrawModel( int flags )
+{
+	if ( !m_bReadyToDraw )
+		return 0;
+
+	// NOTE: We've got a stiff spring case here, we need to simulate at
+	// a fairly fast timestep. A better solution would be to use an 
+	// implicit method, which I'm going to not implement for the moment
+
+	float dt = gpGlobals->frametime;
+	m_EWaveEffect.SetPosition( GetAbsOrigin(), GetAbsAngles() );
+	m_EWaveEffect.Simulate(dt);
+
+	Vector pt[NUM_SUBDIVISIONS * NUM_SUBDIVISIONS];
+	Vector normal[NUM_SUBDIVISIONS * NUM_SUBDIVISIONS];
+	float opacity[NUM_SUBDIVISIONS * NUM_SUBDIVISIONS];
+
+	ComputeEWavePoints( pt, normal, opacity );
+
+    DrawEWavePoints( pt, normal, opacity );
+
+	return 1;
+}
+
+
+
+
+