1HEADmaster

1 files changed, 837 insertions, 0 deletions

diff --git a/game/client/tf2/c_shield.cpp b/game/client/tf2/c_shield.cpp
new file mode 100644
index 0000000..b404a92
--- /dev/null
+++ b/game/client/tf2/c_shield.cpp
@@ -0,0 +1,837 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: Client's sheild entity
+//
+// $Workfile:     $
+// $NoKeywords: $
+//=============================================================================//
+#include "cbase.h"
+#include "C_Shield.h"
+#include "clienteffectprecachesystem.h"
+#include "clientmode.h"
+#include "materialsystem/imesh.h"
+#include "mapdata.h"
+#include "ivrenderview.h"
+#include "tf_shareddefs.h"
+#include "collisionutils.h"
+#include "functionproxy.h"
+
+// Precache the effects
+CLIENTEFFECT_REGISTER_BEGIN( Shield )
+CLIENTEFFECT_MATERIAL( "shadertest/wireframevertexcolor" )
+CLIENTEFFECT_MATERIAL( "effects/shield/shield" )
+CLIENTEFFECT_MATERIAL( "effects/shieldhit" )
+CLIENTEFFECT_MATERIAL( "effects/shieldpass" )
+CLIENTEFFECT_MATERIAL( "effects/shieldpass2" )
+CLIENTEFFECT_REGISTER_END()
+
+//-----------------------------------------------------------------------------
+// Stores a list of all active shields
+//-----------------------------------------------------------------------------
+CUtlVector< C_Shield* >	C_Shield::s_Shields;
+
+
+//-----------------------------------------------------------------------------
+// Various important constants: 
+//-----------------------------------------------------------------------------
+
+#define SHIELD_DAMAGE_CHANGE_FIRST_PASS_TIME		0.3f
+#define SHIELD_DAMAGE_CHANGE_TRANSITION_TIME		0.5f
+#define SHIELD_DAMAGE_CHANGE_TRANSITION_START_TIME	(SHIELD_DAMAGE_CHANGE_TIME -  SHIELD_DAMAGE_CHANGE_TRANSITION_TIME)
+#define SHIELD_DAMAGE_CHANGE_TOTAL_TIME	(SHIELD_DAMAGE_CHANGE_TRANSITION_START_TIME + SHIELD_DAMAGE_CHANGE_TRANSITION_TIME)
+#define SHIELD_TRANSITION_MAX_BLEND_AMT				0.2f
+
+
+//-----------------------------------------------------------------------------
+// Data table
+//-----------------------------------------------------------------------------
+//EXTERN_RECV_TABLE(DT_BaseEntity);
+
+IMPLEMENT_CLIENTCLASS_DT(C_Shield, DT_Shield, CShield)
+	RecvPropInt( RECVINFO(m_nOwningPlayerIndex) ),
+	RecvPropFloat( RECVINFO(m_flPowerLevel) ),
+	RecvPropInt( RECVINFO(m_bIsEMPed) ),
+END_RECV_TABLE()
+
+
+//-----------------------------------------------------------------------------
+// Shield color for the various protection types
+//-----------------------------------------------------------------------------
+static unsigned char s_ImpactDecalColor[3] = {   0,   0, 255 };
+
+
+// ----------------------------------------------------------------------------
+// Functions.
+// ----------------------------------------------------------------------------
+C_Shield::C_Shield()
+{
+	m_pWireframe.Init( "shadertest/wireframevertexcolor", TEXTURE_GROUP_OTHER );
+	m_pShield.Init( "effects/shield/shield", TEXTURE_GROUP_CLIENT_EFFECTS );
+	m_pHitDecal.Init( "effects/shieldhit", TEXTURE_GROUP_CLIENT_EFFECTS );
+	m_pPassDecal.Init( "effects/shieldpass", TEXTURE_GROUP_CLIENT_EFFECTS );
+	m_pPassDecal2.Init( "effects/shieldpass2", TEXTURE_GROUP_CLIENT_EFFECTS );
+	m_FadeValue = 1.0f;
+	m_CurveValue = 1.0f;
+	m_bCollisionsActive = true;
+
+	s_Shields.AddToTail(this);
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+C_Shield::~C_Shield()
+{
+	int i = s_Shields.Find(this);
+	if ( i >= 0 )
+	{
+		s_Shields.FastRemove(i);
+	}
+}
+
+//-----------------------------------------------------------------------------
+// Inherited classes should call this in their constructor to indicate size...
+//-----------------------------------------------------------------------------
+void C_Shield::InitShield( int w, int h, int subdivisions )
+{
+	m_SplinePatch.Init( w, h, 2 );
+
+	m_SubdivisionCount = subdivisions;
+	Assert( m_SubdivisionCount > 1 );
+	m_InvSubdivisionCount = 1.0f / (m_SubdivisionCount - 1);
+}
+
+//-----------------------------------------------------------------------------
+// This is called after a network update 
+//-----------------------------------------------------------------------------
+void C_Shield::OnDataChanged( DataUpdateType_t updateType )
+{
+	if (updateType == DATA_UPDATE_CREATED)
+	{
+		m_StartTime = engine->GetLastTimeStamp();
+	}
+	
+	BaseClass::OnDataChanged( updateType );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : collisionGroup - 
+// Output : Returns true on success, false on failure.
+//-----------------------------------------------------------------------------
+bool C_Shield::ShouldCollide( int collisionGroup, int contentsMask ) const
+{
+	return m_bCollisionsActive && ((collisionGroup == TFCOLLISION_GROUP_WEAPON) || (collisionGroup == TFCOLLISION_GROUP_GRENADE));
+}
+
+//-----------------------------------------------------------------------------
+// Should I draw?
+//-----------------------------------------------------------------------------
+bool C_Shield::ShouldDraw()
+{
+	// Let the client mode (like commander mode) reject drawing entities.
+	if (g_pClientMode && !g_pClientMode->ShouldDrawEntity(this) )
+		return false;
+
+	return true;
+}
+
+//-----------------------------------------------------------------------------
+// Activates/deactivates a shield for collision purposes
+//-----------------------------------------------------------------------------
+void C_Shield::ActivateCollisions( bool activate )
+{
+	m_bCollisionsActive = activate;
+}
+
+//-----------------------------------------------------------------------------
+// Activates all shields 
+//-----------------------------------------------------------------------------
+void C_Shield::ActivateShields( bool activate, int team )
+{
+	for (int i = s_Shields.Count(); --i >= 0; )
+	{
+		// Activate all shields on the same team
+		if ( (team == -1) || (team == s_Shields[i]->GetTeamNumber()) )
+		{
+			s_Shields[i]->ActivateCollisions( activate );
+		}
+	}
+}
+
+//-----------------------------------------------------------------------------
+// Helper method for collision testing
+//-----------------------------------------------------------------------------
+#pragma warning ( disable : 4701 )
+
+bool C_Shield::TestCollision( const Ray_t& ray, unsigned int mask, trace_t& trace )
+{
+	// Can't block anything if we're EMPed, or we've got no power left to block
+	if ( m_bIsEMPed )
+		return false;
+	if ( m_flPowerLevel <= 0 )
+		return false;
+
+	// Here, we're gonna test for collision.
+	// If we don't stop this kind of bullet, we'll generate an effect here
+	// but we won't change the trace to indicate a collision.
+
+	// It's just polygon soup...
+	int hitgroup;
+	bool firstTri;
+	int v1[2], v2[2], v3[2];
+	float ihit, jhit;
+	float mint = FLT_MAX;
+	float t;
+
+	int h = Height();
+	int w = Width();
+
+	for (int i = 0; i < h - 1; ++i)
+	{
+		for (int j = 0; j < w - 1; ++j)
+		{
+			// Don't test if this panel ain't active...
+			if (!IsPanelActive( j, i ))
+				continue;
+
+			// NOTE: Structure order of points so that our barycentric
+			// axes for each triangle are along the (u,v) directions of the mesh
+			// The barycentric coords we'll need below 
+
+			// Two triangles per quad...
+			t = IntersectRayWithTriangle( ray,
+				GetPoint( j, i + 1 ),
+				GetPoint( j + 1, i + 1 ),
+				GetPoint( j, i ), true );
+			if ((t >= 0.0f) && (t < mint))
+			{
+				mint = t;
+				v1[0] = j;		v1[1] = i + 1;
+				v2[0] = j + 1;	v2[1] = i + 1;
+				v3[0] = j;		v3[1] = i;
+				ihit = i; jhit = j;
+				firstTri = true;
+			}
+			
+			t = IntersectRayWithTriangle( ray,
+				GetPoint( j + 1, i ),
+				GetPoint( j, i ),
+				GetPoint( j + 1, i + 1 ), true );
+			if ((t >= 0.0f) && (t < mint))
+			{
+				mint = t;
+				v1[0] = j + 1;	v1[1] = i;
+				v2[0] = j;		v2[1] = i;
+				v3[0] = j + 1;	v3[1] = i + 1;
+				ihit = i; jhit = j;
+				firstTri = false;
+			}
+		}
+	}
+
+	if (mint == FLT_MAX)
+		return false;
+
+	// Stuff the barycentric coordinates of the triangle hit into the hit group 
+	// For the first triangle, the first edge goes along u, the second edge goes
+	// along -v. For the second triangle, the first edge goes along -u,
+	// the second edge goes along v.
+	const Vector& v1vec = GetPoint(v1[0], v1[1]);
+	const Vector& v2vec = GetPoint(v2[0], v2[1]);
+	const Vector& v3vec = GetPoint(v3[0], v3[1]);
+	float u, v;
+	bool ok = ComputeIntersectionBarycentricCoordinates( ray, 
+		v1vec, v2vec, v3vec, u, v );
+	Assert( ok );
+	if ( !ok )
+	{
+		return false;
+	}
+
+	if (firstTri)
+		v = 1.0 - v;
+	else
+		u = 1.0 - u;
+	v += ihit; u += jhit;
+	v /= (h - 1);
+	u /= (w - 1);
+
+	// Compress (u,v) into 1 dot 15, v in top bits
+	hitgroup = (((int)(v * (1 << 15))) << 16) + (int)(u * (1 << 15));
+
+	Vector normal;
+	float intercept;
+	ComputeTrianglePlane( v1vec, v2vec, v3vec, normal, intercept ); 
+
+	UTIL_SetTrace( trace, ray, this, mint, hitgroup, CONTENTS_SOLID, normal, intercept );
+	return true;
+}
+
+#pragma warning ( default : 4701 )
+
+//-----------------------------------------------------------------------------
+// Called when we hit something that we deflect...
+//-----------------------------------------------------------------------------
+void C_Shield::RegisterDeflection(const Vector& vecDir, int bitsDamageType, trace_t *ptr)
+{
+	Vector normalDir;
+	VectorCopy( vecDir, normalDir );
+	VectorNormalize( normalDir );
+
+	CreateShieldDeflection( ptr->hitgroup, normalDir, false );
+}
+
+//-----------------------------------------------------------------------------
+// This is required to get all the decals to animate correctly
+//-----------------------------------------------------------------------------
+void C_Shield::SetCurrentDecal( int idx )
+{
+	m_CurrentDecal = idx;
+}
+
+//-----------------------------------------------------------------------------
+// returns the address of a variable that stores the material animation frame
+//-----------------------------------------------------------------------------
+float C_Shield::GetTextureAnimationStartTime()
+{
+	if( m_CurrentDecal == -1 )
+		return m_StartTime;
+	return m_Decals[m_CurrentDecal].m_StartTime;
+}
+
+//-----------------------------------------------------------------------------
+// Indicates that a texture animation has wrapped
+//-----------------------------------------------------------------------------
+void C_Shield::TextureAnimationWrapped()
+{
+	if( m_CurrentDecal != -1 )
+	{
+		m_Decals[m_CurrentDecal].m_StartTime = -1.0f;
+	}
+}
+
+
+//-----------------------------------------------------------------------------
+// Indicates a collision occurred: 
+//-----------------------------------------------------------------------------
+void C_Shield::ReceiveMessage( int classID,  bf_read &msg )
+{
+	if ( classID != GetClientClass()->m_ClassID )
+	{
+		// message is for subclass
+		BaseClass::ReceiveMessage( classID, msg );
+		return;
+	}
+
+	int hitgroup;
+	Vector dir;
+	unsigned char partialBlock;
+
+	hitgroup = msg.ReadLong( );
+	msg.ReadBitVec3Normal( dir );
+	partialBlock = msg.ReadByte( );
+
+	CreateShieldDeflection( hitgroup, dir, partialBlock );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void C_Shield::CreateShieldDeflection( int hitgroup, const Vector &dir, bool partialBlock )
+{
+	float hitU = (float)(hitgroup & 0xFFFF) / (float)(1 << 15);
+	float hitV = (float)(hitgroup >> 16) / (float)(1 << 15);
+
+	Ripple_t ripple;
+	ripple.m_RippleU = hitU;
+	ripple.m_RippleV = hitV;
+	ripple.m_Amplitude = partialBlock ? 4 : 30;
+	ripple.m_Radius = 0.08f;
+	ripple.m_StartTime = engine->GetLastTimeStamp();
+	ripple.m_Direction = dir;
+	m_Ripples.AddToTail(ripple);
+
+	Decal_t decal;
+	decal.m_RippleU = hitU;
+	decal.m_RippleV = hitV;
+	decal.m_Radius = partialBlock ? 0.03f : 0.08f;
+	decal.m_StartTime = engine->GetLastTimeStamp();
+	m_Decals.AddToTail(decal);
+}
+
+
+//-----------------------------------------------------------------------------
+// Draws the control points in wireframe
+//-----------------------------------------------------------------------------
+void C_Shield::DrawWireframeModel( Vector const** ppPositions )
+{
+	IMesh* pMesh = materials->GetDynamicMesh( true, NULL, NULL, m_pWireframe );
+
+	int numLines = (Height() - 1) * Width() + Height() * (Width() - 1);
+
+	CMeshBuilder meshBuilder;
+	meshBuilder.Begin( pMesh, MATERIAL_LINES, numLines );
+
+	Vector const* tmp;
+	for (int i = 0; i < Height(); ++i)
+	{
+		for (int j = 0; j < Width(); ++j)
+		{
+			if ( i > 0 )
+			{
+				tmp = ppPositions[j + Width() * i];
+				meshBuilder.Position3fv( tmp->Base() );
+				meshBuilder.Color4ub( 255, 255, 255, 128 );
+				meshBuilder.AdvanceVertex();
+
+				tmp = ppPositions[j + Width() * (i-1)];
+				meshBuilder.Position3fv( tmp->Base() );
+				meshBuilder.Color4ub( 255, 255, 255, 128 );
+				meshBuilder.AdvanceVertex();
+			}
+
+			if (j > 0)
+			{
+				tmp = ppPositions[j + Width() * i];
+				meshBuilder.Position3fv( tmp->Base() );
+				meshBuilder.Color4ub( 255, 255, 255, 128 );
+				meshBuilder.AdvanceVertex();
+
+				tmp = ppPositions[j - 1 + Width() * i];
+				meshBuilder.Position3fv( tmp->Base() );
+				meshBuilder.Color4ub( 255, 255, 255, 128 );
+				meshBuilder.AdvanceVertex();
+			}
+		}
+	}
+
+	meshBuilder.End();
+	pMesh->Draw();
+}
+
+//-----------------------------------------------------------------------------
+// Draws the base shield
+//-----------------------------------------------------------------------------
+#define TRANSITION_REGION_WIDTH 0.5f
+
+extern ConVar mat_wireframe;
+
+void C_Shield::DrawShieldPoints(Vector* pt, Vector* normal, float* opacity)
+{
+	SetCurrentDecal( -1 );
+
+	if (mat_wireframe.GetInt() == 0)
+		materials->Bind( m_pShield, (IClientRenderable*)this );
+	else
+		materials->Bind( m_pWireframe, (IClientRenderable*)this );
+	IMesh* pMesh = materials->GetDynamicMesh( true, NULL, NULL );
+
+	int numTriangles = (m_SubdivisionCount - 1) * (m_SubdivisionCount - 1) * 2;
+
+	CMeshBuilder meshBuilder;
+	meshBuilder.Begin( pMesh, MATERIAL_TRIANGLES, numTriangles );
+
+	float du = 1.0f * m_InvSubdivisionCount;
+	float dv = du;
+
+	unsigned char color[3];
+	color[0] = 255; 
+	color[1] = 255; 
+	color[2] = 255; 
+
+	for ( int i = 0; i < m_SubdivisionCount - 1; ++i)
+	{
+		float v = i * dv;
+
+		for (int j = 0; j < m_SubdivisionCount - 1; ++j)
+		{
+			int idx = i * m_SubdivisionCount + 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 + m_SubdivisionCount].Base() );
+			meshBuilder.Color4ub( color[0], color[1], color[2], opacity[idx+m_SubdivisionCount] );
+			meshBuilder.Normal3fv( normal[idx + m_SubdivisionCount].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 + m_SubdivisionCount].Base() );
+			meshBuilder.Color4ub( color[0], color[1], color[2], opacity[idx+m_SubdivisionCount] );
+			meshBuilder.Normal3fv( normal[idx + m_SubdivisionCount].Base() );
+			meshBuilder.TexCoord2f( 0, u, v + dv );
+			meshBuilder.AdvanceVertex();
+
+			meshBuilder.Position3fv( pt[idx + m_SubdivisionCount + 1].Base() );
+			meshBuilder.Color4ub( color[0], color[1], color[2], opacity[idx+m_SubdivisionCount+1] );
+			meshBuilder.Normal3fv( normal[idx + m_SubdivisionCount + 1].Base() );
+			meshBuilder.TexCoord2f( 0, u + du, v + dv );
+			meshBuilder.AdvanceVertex();
+		}
+	}
+
+	meshBuilder.End();
+	pMesh->Draw();
+}
+
+
+
+//-----------------------------------------------------------------------------
+// Draws shield decals
+//-----------------------------------------------------------------------------
+void C_Shield::DrawShieldDecals( Vector* pt, bool hitDecals )
+{
+	if (m_Decals.Size() == 0)
+		return;
+
+	// Compute ripples:
+	for ( int r = m_Decals.Size(); --r >= 0; )
+	{
+		// At the moment, nothing passes!
+		bool passDecal = false;
+		if ((!hitDecals) && (passDecal == hitDecals))
+			continue;
+
+		SetCurrentDecal( r );
+
+		// We have to force a flush here because we're changing the proxy state
+		if (!hitDecals)
+			materials->Bind( m_pPassDecal, (IClientRenderable*)this );
+		else
+			materials->Bind( passDecal ? m_pPassDecal2 : m_pHitDecal, (IClientRenderable*)this );
+
+		float dtime = gpGlobals->curtime - m_Decals[r].m_StartTime;
+		float decay = exp( -( 2 * dtime) );
+
+		// Retire the animation if it wraps
+		// This gets set by TextureAnimatedWrapped above
+		if ((m_Decals[r].m_StartTime < 0.0f) || (decay < 1e-3))
+		{
+			m_Decals.Remove(r);
+			continue;
+		}
+
+		IMesh* pMesh = materials->GetDynamicMesh();
+
+		// Figure out the quads we must mod2x....
+		float u0 = m_Decals[r].m_RippleU - m_Decals[r].m_Radius;
+		float u1 = m_Decals[r].m_RippleU + m_Decals[r].m_Radius;
+		float v0 = m_Decals[r].m_RippleV - m_Decals[r].m_Radius;
+		float v1 = m_Decals[r].m_RippleV + m_Decals[r].m_Radius;
+		float du = u1 - u0;
+		float dv = v1 - v0;
+
+		int i0 = Floor2Int( v0 * (m_SubdivisionCount - 1) );
+		int i1 = Ceil2Int( v1 * (m_SubdivisionCount - 1) );
+		int j0 = Floor2Int( u0 * (m_SubdivisionCount - 1) );
+		int j1 = Ceil2Int( u1 * (m_SubdivisionCount - 1) );
+		if (i0 < 0)
+			i0 = 0;
+		if (i1 >= m_SubdivisionCount)
+			i1 = m_SubdivisionCount - 1;
+		if (j0 < 0)
+			j0 = 0;
+		if (j1 >= m_SubdivisionCount)
+			j1 = m_SubdivisionCount - 1;
+
+		int numTriangles = (i1 - i0) * (j1 - j0) * 2;
+
+		CMeshBuilder meshBuilder;
+		meshBuilder.Begin( pMesh, MATERIAL_TRIANGLES, numTriangles );
+
+		float decalDu = m_InvSubdivisionCount / du;
+		float decalDv = m_InvSubdivisionCount / dv;
+
+		unsigned char color[3];
+		color[0] = s_ImpactDecalColor[0] * decay;
+		color[1] = s_ImpactDecalColor[1] * decay;
+		color[2] = s_ImpactDecalColor[2] * decay;
+
+		for ( int i = i0; i < i1; ++i)
+		{
+			float t = (float)i * m_InvSubdivisionCount;
+			for (int j = j0; j < j1; ++j)
+			{
+				float s = (float)j * m_InvSubdivisionCount;
+				int idx = i * m_SubdivisionCount + j;
+
+				// Compute (u,v) into the decal
+				float decalU = (s - u0) / du;
+				float decalV = (t - v0) / dv;
+
+				meshBuilder.Position3fv( pt[idx].Base() );
+				meshBuilder.Color3ubv( color );
+				meshBuilder.TexCoord2f( 0, decalU, decalV );
+				meshBuilder.AdvanceVertex();
+
+				meshBuilder.Position3fv( pt[idx + m_SubdivisionCount].Base() );
+				meshBuilder.Color3ubv( color );
+				meshBuilder.TexCoord2f( 0, decalU, decalV + decalDv );
+				meshBuilder.AdvanceVertex();
+
+				meshBuilder.Position3fv( pt[idx + 1].Base() );
+				meshBuilder.Color3ubv( color );
+				meshBuilder.TexCoord2f( 0, decalU + decalDu, decalV );
+				meshBuilder.AdvanceVertex();
+
+				meshBuilder.Position3fv( pt[idx + 1].Base() );
+				meshBuilder.Color3ubv( color );
+				meshBuilder.TexCoord2f( 0, decalU + decalDu, decalV );
+				meshBuilder.AdvanceVertex();
+
+				meshBuilder.Position3fv( pt[idx + m_SubdivisionCount].Base() );
+				meshBuilder.Color3ubv( color );
+				meshBuilder.TexCoord2f( 0, decalU, decalV + decalDv );
+				meshBuilder.AdvanceVertex();
+
+				meshBuilder.Position3fv( pt[idx + m_SubdivisionCount + 1].Base() );
+				meshBuilder.Color3ubv( color );
+				meshBuilder.TexCoord2f( 0, decalU + decalDu, decalV + decalDv );
+				meshBuilder.AdvanceVertex();
+			}
+		}
+
+		meshBuilder.End();
+		pMesh->Draw();
+	}
+}
+
+
+//-----------------------------------------------------------------------------
+// Computes a single point
+//-----------------------------------------------------------------------------
+void C_Shield::ComputePoint( float s, float t, Vector& pt, Vector& normal, float& opacity )
+{
+	// Precache some computations for the point on the spline at (s, t).
+	m_SplinePatch.SetupPatchQuery( s, t );
+
+	// Get the position + normal
+	m_SplinePatch.GetPointAndNormal( pt, normal );
+
+	// From here on down is all futzing with opacity
+
+	// Check neighbors for activity...
+	bool active = IsPanelActive(m_SplinePatch.m_is, m_SplinePatch.m_it);
+	if (m_SplinePatch.m_fs == 0.0f)
+		active = active || IsPanelActive(m_SplinePatch.m_is - 1, m_SplinePatch.m_it);
+	if (m_SplinePatch.m_ft == 0.0f)
+		active = active || IsPanelActive(m_SplinePatch.m_is, m_SplinePatch.m_it - 1);
+
+	if (!active)
+	{
+		// If the panel's not active, it's transparent.
+		opacity = 0.0f;
+	}
+	else
+	{
+		if ((s == 0.0f) || (t == 0.0f) ||
+			(s == (Width() - 1.0f)) || (t == (Height() - 1.0f)) )
+		{
+			// If it's on the edge, it's max opacity
+			opacity = 192.0f;
+		}
+		else
+		{
+			// Channel zero is the opacity data
+			opacity = m_SplinePatch.GetChannel( 0 );
+
+			// Make the shield translucent if the owner is the local player...
+			// Also don't mess with the edges..
+			if (m_ShieldOwnedByLocalPlayer)
+			{
+				// Channel 1 is the opacity blend
+				float blendFactor = m_SplinePatch.GetChannel( 1 );
+				blendFactor = clamp( blendFactor, 0.0f, 1.0f );
+
+				float blendValue = 1.0f; 
+				Vector delta;
+				VectorSubtract( pt, GetAbsOrigin(), delta );
+				float dist = VectorLength( delta );
+				if (dist != 0.0f)
+				{
+					delta *= 1.0f / dist;
+					float dot = DotProduct( m_ViewDir, delta );
+					float angle = acos(	dot );
+					float fov = M_PI * render->GetFieldOfView() / 180.0f;
+					if (angle < fov * .2f)
+						blendValue = 0.1f;
+					else if (angle < fov * 0.4f)
+					{
+						// Want a cos falloff between .2 and .4
+						// 0.1 at .2 and 1.0 at .4
+						angle -= fov * 0.2f;
+						blendValue = 1.0f - 0.9f * 0.5f * (cos ( M_PI * angle / (fov * 0.2f) ) + 1.0f);
+					}
+				}
+
+				// Interpolate between 1 and the blend value based on the blend factor...
+				opacity *= (1.0f - blendFactor) + blendFactor * blendValue;
+			}
+
+			opacity = clamp( opacity, 0.0f, 192.0f );
+		}
+	}
+	opacity *= m_FadeValue;
+}
+
+
+//-----------------------------------------------------------------------------
+// Compute the shield points using catmull-rom
+//-----------------------------------------------------------------------------
+void C_Shield::ComputeShieldPoints( Vector* pt, Vector* normal, float* opacity )
+{
+	int i;
+	for ( i = 0; i < m_SubdivisionCount; ++i)
+	{
+		float t = (Height() - 1) * (float)i * m_InvSubdivisionCount;
+		for (int j = 0; j < m_SubdivisionCount; ++j)
+		{
+			float s = (Width() - 1) * (float)j * m_InvSubdivisionCount;
+			int idx = i * m_SubdivisionCount + j;
+
+			ComputePoint( s, t, pt[idx], normal[idx], opacity[idx] );
+		}
+	}
+}
+
+//-----------------------------------------------------------------------------
+// Compute the shield ripples from being hit
+//-----------------------------------------------------------------------------
+void C_Shield::RippleShieldPoints( Vector* pt, float* opacity )
+{
+	// Compute ripples:
+	for ( int r = m_Ripples.Size(); --r >= 0; )
+	{
+		float dtime = gpGlobals->curtime - m_Ripples[r].m_StartTime;
+		float decay = exp( -( 2 * dtime) );
+		float amplitude = m_Ripples[r].m_Amplitude * decay;
+
+		for ( int i = 0; i < m_SubdivisionCount; ++i)
+		{
+			float t = i * m_InvSubdivisionCount;
+			for (int j = 0; j < m_SubdivisionCount; ++j)
+			{
+				float s = j * m_InvSubdivisionCount;
+				int idx = i * m_SubdivisionCount + j;
+
+				float ds = s - m_Ripples[r].m_RippleU;
+				float dt = t - m_Ripples[r].m_RippleV;
+				float dr = sqrt( ds * ds + dt * dt );
+				if (dr < m_Ripples[r].m_Radius)
+				{
+					// need to apply ripple
+					float diff = amplitude * cos( 0.5f * M_PI * dr / m_Ripples[r].m_Radius );
+					VectorMA( pt[idx], diff, m_Ripples[r].m_Direction, pt[idx] );
+
+					// Compute opacity at this point...
+					float impactopacity = 192.0f * decay * dr / m_Ripples[r].m_Radius;
+					if (impactopacity > opacity[idx])
+						opacity[idx] = impactopacity;
+				}
+			}
+		}
+
+		if (amplitude < 0.1)
+			m_Ripples.Remove(r);
+	}
+}
+
+//-----------------------------------------------------------------------------
+// Main draw entry point
+//-----------------------------------------------------------------------------
+int	C_Shield::DrawModel( int flags )
+{
+	if ( !m_bReadyToDraw )
+		return 0;
+
+	if (m_FadeValue == 0.0f)
+		return 1;
+
+	// If I have no power, don't draw
+	if ( m_flPowerLevel <= 0 )
+		return 1;
+
+	// Make it curvy or not!!
+	m_SplinePatch.SetLinearBlend( m_CurveValue );
+
+	// Set up the patch with all the data it's going to need
+	int count = Width() * Height();
+ 	Vector const** pControlPoints = (Vector const**)stackalloc(count * sizeof(Vector*));
+	float* pControlOpacity = (float*)stackalloc(count * sizeof(float));
+	float* pControlBlend = (float*)stackalloc(count * sizeof(float));
+
+	GetShieldData( pControlPoints, pControlOpacity, pControlBlend );
+	m_SplinePatch.SetControlPositions( pControlPoints );
+	m_SplinePatch.SetChannelData( 0, pControlOpacity );
+	m_SplinePatch.SetChannelData( 1, pControlBlend );
+
+//	DrawWireframeModel( pControlPoints );
+
+	// Allocate space for temporary data
+	int numSubdivisions = m_SubdivisionCount * m_SubdivisionCount;
+	Vector* pt = (Vector*)stackalloc(numSubdivisions * sizeof(Vector));
+	Vector* normal = (Vector*)stackalloc(numSubdivisions * sizeof(Vector));
+	float* opacity = (float*)stackalloc(numSubdivisions * sizeof(float));
+
+	// Do something a little special if this shield is owned by the local player
+	C_BasePlayer *player = C_BasePlayer::GetLocalPlayer();
+	m_ShieldOwnedByLocalPlayer = (player->entindex() == m_nOwningPlayerIndex);
+	if (m_ShieldOwnedByLocalPlayer)
+	{
+		QAngle viewAngles;
+		engine->GetViewAngles(viewAngles);
+		AngleVectors( viewAngles, &m_ViewDir );
+	}
+
+	ComputeShieldPoints( pt, normal, opacity );
+	RippleShieldPoints( pt, opacity );
+
+	// Commented out because it causes things to not be drawn behind it
+//	DrawShieldDecals( pt, false );
+
+    DrawShieldPoints( pt, normal, opacity );
+	DrawShieldDecals( pt, true );
+
+	return 1;
+}
+
+
+
+//============================================================================================================
+// SHIELD POWERLEVEL PROXY
+//============================================================================================================
+class CShieldPowerLevelProxy : public CResultProxy
+{
+public:
+	void OnBind( void *pC_BaseEntity );
+};
+
+void CShieldPowerLevelProxy::OnBind( void *pRenderable )
+{
+	IClientRenderable *pRend = (IClientRenderable *)pRenderable;
+	C_BaseEntity *pEntity = pRend->GetIClientUnknown()->GetBaseEntity();
+	C_Shield *pShield = dynamic_cast<C_Shield*>(pEntity);
+	if (!pShield)
+		return;
+
+	SetFloatResult( pShield->GetPowerLevel() );
+}
+
+EXPOSE_INTERFACE( CShieldPowerLevelProxy, IMaterialProxy, "ShieldPowerLevel" IMATERIAL_PROXY_INTERFACE_VERSION );