1 files changed, 252 insertions, 0 deletions
diff --git a/materialsystem/stdshaders/cloak_blended_pass_dx8_helper.cpp b/materialsystem/stdshaders/cloak_blended_pass_dx8_helper.cpp
new file mode 100644
index 0000000..e3d82c6
--- /dev/null
+++ b/materialsystem/stdshaders/cloak_blended_pass_dx8_helper.cpp
@@ -0,0 +1,252 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+
+/* Example how to plug this into an existing shader:
+
+		In the VMT:
+			// Cloak Pass
+			"$cloakPassEnabled" "1"
+
+		#include "cloak_blended_pass_helper.h"
+ 
+		In BEGIN_SHADER_PARAMS:
+			// Cloak Pass
+			SHADER_PARAM( CLOAKPASSENABLED, SHADER_PARAM_TYPE_BOOL, "0", "Enables cloak render in a second pass" )
+			SHADER_PARAM( CLOAKFACTOR, SHADER_PARAM_TYPE_FLOAT, "0.0", "" )
+			SHADER_PARAM( CLOAKCOLORTINT, SHADER_PARAM_TYPE_COLOR, "[1 1 1]", "Cloak color tint" )
+			SHADER_PARAM( REFRACTAMOUNT, SHADER_PARAM_TYPE_FLOAT, "2", "" )
+
+		Add this above SHADER_INIT_PARAMS()
+			// Cloak Pass
+			void SetupVarsCloakBlendedPass( CloakBlendedPassVars_t &info )
+			{
+				info.m_nCloakFactor = CLOAKFACTOR;
+				info.m_nCloakColorTint = CLOAKCOLORTINT;
+				info.m_nRefractAmount = REFRACTAMOUNT;
+			}
+
+			bool NeedsPowerOfTwoFrameBufferTexture( IMaterialVar **params, bool bCheckSpecificToThisFrame ) const 
+			{ 
+				if ( params[CLOAKPASSENABLED]->GetIntValue() ) // If material supports cloaking
+				{
+					if ( bCheckSpecificToThisFrame == false ) // For setting model flag at load time
+						return true;
+					else if ( ( params[CLOAKFACTOR]->GetFloatValue() > 0.0f ) && ( params[CLOAKFACTOR]->GetFloatValue() < 1.0f ) ) // Per-frame check
+						return true;
+					// else, not cloaking this frame, so check flag2 in case the base material still needs it
+				}
+
+				// Check flag2 if not drawing cloak pass
+				return IS_FLAG2_SET( MATERIAL_VAR2_NEEDS_POWER_OF_TWO_FRAME_BUFFER_TEXTURE ); 
+			}
+
+			bool IsTranslucent( IMaterialVar **params ) const
+			{
+				if ( params[CLOAKPASSENABLED]->GetIntValue() ) // If material supports cloaking
+				{
+					if ( ( params[CLOAKFACTOR]->GetFloatValue() > 0.0f ) && ( params[CLOAKFACTOR]->GetFloatValue() < 1.0f ) ) // Per-frame check
+						return true;
+					// else, not cloaking this frame, so check flag in case the base material still needs it
+				}
+
+				// Check flag if not drawing cloak pass
+				return IS_FLAG_SET( MATERIAL_VAR_TRANSLUCENT ); 
+			}
+
+		In SHADER_INIT_PARAMS()
+			// Cloak Pass
+			if ( !params[CLOAKPASSENABLED]->IsDefined() )
+			{
+				params[CLOAKPASSENABLED]->SetIntValue( 0 );
+			}
+			else if ( params[CLOAKPASSENABLED]->GetIntValue() )
+			{
+				CloakBlendedPassVars_t info;
+				SetupVarsCloakBlendedPass( info );
+				InitParamsCloakBlendedPass( this, params, pMaterialName, info );
+			}
+
+		In SHADER_INIT
+			// Cloak Pass
+			if ( params[CLOAKPASSENABLED]->GetIntValue() )
+			{
+				CloakBlendedPassVars_t info;
+				SetupVarsCloakBlendedPass( info );
+				InitCloakBlendedPass( this, params, info );
+			}
+
+		Modify SHADER_DRAW to look something like this:
+			// Skip the standard rendering if cloak pass is fully opaque
+			bool bDrawStandardPass = true;
+			if ( params[CLOAKPASSENABLED]->GetIntValue() && ( pShaderShadow == NULL ) ) // && not snapshotting
+			{
+				CloakBlendedPassVars_t info;
+				SetupVarsCloakBlendedPass( info );
+				if ( CloakBlendedPassIsFullyOpaque( params, info ) )
+				{
+					bDrawStandardPass = false;
+				}
+			}
+
+			// Standard rendering pass
+			if ( bDrawStandardPass )
+			{
+				Eye_Refract_Vars_t info;
+				SetupVarsEyeRefract( info );
+				Draw_Eyes_Refract( this, params, pShaderAPI, pShaderShadow, info );
+			}
+			else
+			{
+				// Skip this pass!
+				Draw( false );
+			}
+
+			// Cloak Pass
+			if ( params[CLOAKPASSENABLED]->GetIntValue() )
+			{
+				// If ( snapshotting ) or ( we need to draw this frame )
+				if ( ( pShaderShadow != NULL ) || ( ( params[CLOAKFACTOR]->GetFloatValue() > 0.0f ) && ( params[CLOAKFACTOR]->GetFloatValue() < 1.0f ) ) )
+				{
+					CloakBlendedPassVars_t info;
+					SetupVarsCloakBlendedPass( info );
+					DrawCloakBlendedPass( this, params, pShaderAPI, pShaderShadow, info, vertexCompression );
+				}
+				else // We're not snapshotting and we don't need to draw this frame
+				{
+					// Skip this pass!
+					Draw( false );
+				}
+			}
+
+==================================================================================================== */
+
+#include "BaseVSShader.h"
+#include "mathlib/vmatrix.h"
+#include "cloak_blended_pass_helper.h"
+#include "convar.h"
+
+// Auto generated inc files
+#include "cloak_blended_pass_dx8_vs11.inc"
+
+void InitParamsCloakBlendedPass( CBaseVSShader *pShader, IMaterialVar** params, const char *pMaterialName, CloakBlendedPassVars_t &info )
+{
+	// Set material flags
+	SET_FLAGS2( MATERIAL_VAR2_SUPPORTS_HW_SKINNING );
+	SET_FLAGS( MATERIAL_VAR_MODEL );
+	SET_FLAGS2( MATERIAL_VAR2_NEEDS_TANGENT_SPACES );
+
+	// Set material parameter default values
+	if ( ( info.m_nCloakFactor != -1 ) && ( !params[info.m_nCloakFactor]->IsDefined() ) )
+	{
+		params[info.m_nCloakFactor]->SetFloatValue( kDefaultCloakFactor );
+	}
+
+	if ( ( info.m_nRefractAmount != -1 ) && ( !params[info.m_nRefractAmount]->IsDefined() ) )
+	{
+		params[info.m_nRefractAmount]->SetFloatValue( kDefaultRefractAmount );
+	}
+
+	if ( ( info.m_nCloakColorTint != -1 ) && ( !params[info.m_nCloakColorTint]->IsDefined() ) )
+	{
+		params[info.m_nCloakColorTint]->SetVecValue( kDefaultCloakColorTint[0], kDefaultCloakColorTint[1], kDefaultCloakColorTint[2], kDefaultCloakColorTint[3] );
+	}
+}
+
+void InitCloakBlendedPass( CBaseVSShader *pShader, IMaterialVar** params, CloakBlendedPassVars_t &info )
+{
+	// No textures
+}
+
+void DrawCloakBlendedPass( CBaseVSShader *pShader, IMaterialVar** params, IShaderDynamicAPI *pShaderAPI,
+						  IShaderShadow* pShaderShadow, CloakBlendedPassVars_t &info, VertexCompressionType_t vertexCompression )
+{
+	SHADOW_STATE
+	{
+		// Reset shadow state manually since we're drawing from two materials
+		pShader->SetInitialShadowState( );
+
+		// Set stream format (note that this shader supports compression)
+		unsigned int flags = VERTEX_POSITION | VERTEX_NORMAL | VERTEX_FORMAT_COMPRESSED;
+		int nTexCoordCount = 1;
+		int userDataSize = 0;
+		pShaderShadow->VertexShaderVertexFormat( flags, nTexCoordCount, NULL, userDataSize );
+
+		// Vertex Shader
+		cloak_blended_pass_dx8_vs11_Static_Index vshIndex;
+		pShaderShadow->SetVertexShader( "cloak_blended_pass_dx8_vs11", vshIndex.GetIndex() );
+
+		// Pixel Shader
+		pShaderShadow->SetPixelShader( "cloak_blended_pass_dx8_ps11", 0 );
+
+		// Textures
+		pShaderShadow->EnableTexture( SHADER_SAMPLER0, true ); // Renderable texture for refraction
+
+		// Blending
+		pShader->EnableAlphaBlending( SHADER_BLEND_SRC_ALPHA, SHADER_BLEND_ONE_MINUS_SRC_ALPHA );
+		pShaderShadow->EnableAlphaWrites( false );
+
+		// !!! We need to turn this back on because EnableAlphaBlending() above disables it!
+		pShaderShadow->EnableDepthWrites( true );
+	}
+	DYNAMIC_STATE
+	{
+		// Reset render state manually since we're drawing from two materials
+		pShaderAPI->SetDefaultState();
+
+		// Set Vertex Shader Combos
+		cloak_blended_pass_dx8_vs11_Dynamic_Index vshIndex;
+		vshIndex.SetSKINNING( pShaderAPI->GetCurrentNumBones() > 0 );
+		pShaderAPI->SetVertexShaderIndex( vshIndex.GetIndex() );
+
+		// Set Vertex Shader Constants 
+		float vVsConst3[4] = { 1.35f, 0.0f, 0.4f, ( 1.0f / ( 0.425f - 0.4f ) ) };
+		vVsConst3[1] = clamp( IS_PARAM_DEFINED( info.m_nCloakFactor ) ? params[info.m_nCloakFactor]->GetFloatValue() : kDefaultCloakFactor, 0.0f, 1.0f );
+
+		pShaderAPI->SetVertexShaderConstant( VERTEX_SHADER_SHADER_SPECIFIC_CONST_3, vVsConst3 );
+
+		float vVsConst4[4] = { 0.0f, 0.0f, 0.0f, 0.0f };
+		vVsConst4[0] = params[info.m_nRefractAmount]->GetFloatValue() * ( 1.0f - clamp( params[info.m_nCloakFactor]->GetFloatValue(), 0.0f, 1.0f ) );
+		pShaderAPI->SetVertexShaderConstant( VERTEX_SHADER_SHADER_SPECIFIC_CONST_4, vVsConst4 );
+
+		float vVsConst5[4] = { 1.0f, 1.0f, 0.0f, 0.0f };
+		pShaderAPI->SetVertexShaderConstant( VERTEX_SHADER_SHADER_SPECIFIC_CONST_5, vVsConst5, 1 );
+
+		// Bind textures
+		pShaderAPI->BindStandardTexture( SHADER_SAMPLER0, TEXTURE_FRAME_BUFFER_FULL_TEXTURE_0 ); // Refraction Map
+
+		// Set Pixel Shader Constants 
+
+		// Refract color tint
+		float vPsConst0[4] = { 0.0f, 0.0f, 0.0f, 0.0f };
+		float fColorTintStrength = clamp( ( clamp( IS_PARAM_DEFINED( info.m_nCloakFactor ) ? params[info.m_nCloakFactor]->GetFloatValue() : kDefaultCloakFactor, 0.0f, 1.0f ) - 0.75f ) * 4.0f, 0.0f, 1.0f );
+		vPsConst0[0] = IS_PARAM_DEFINED( info.m_nCloakColorTint ) ? params[info.m_nCloakColorTint]->GetVecValue()[0] : kDefaultCloakColorTint[0];
+		vPsConst0[1] = IS_PARAM_DEFINED( info.m_nCloakColorTint ) ? params[info.m_nCloakColorTint]->GetVecValue()[1] : kDefaultCloakColorTint[1];
+		vPsConst0[2] = IS_PARAM_DEFINED( info.m_nCloakColorTint ) ? params[info.m_nCloakColorTint]->GetVecValue()[2] : kDefaultCloakColorTint[2];
+
+		vPsConst0[0] = SrgbLinearToGamma( vPsConst0[0] );
+		vPsConst0[1] = SrgbLinearToGamma( vPsConst0[1] );
+		vPsConst0[2] = SrgbLinearToGamma( vPsConst0[2] );
+
+		vPsConst0[0] = ( vPsConst0[0] * ( 1.0f - fColorTintStrength ) ) + ( fColorTintStrength );
+		vPsConst0[1] = ( vPsConst0[1] * ( 1.0f - fColorTintStrength ) ) + ( fColorTintStrength );
+		vPsConst0[2] = ( vPsConst0[2] * ( 1.0f - fColorTintStrength ) ) + ( fColorTintStrength );
+
+		pShaderAPI->SetPixelShaderConstant( 0, vPsConst0, 1 );
+	}
+	pShader->Draw();
+}
+
+bool CloakBlendedPassIsFullyOpaque ( IMaterialVar** params, CloakBlendedPassVars_t &info )
+{
+	float flCloakFactor = IS_PARAM_DEFINED( info.m_nCloakFactor ) ? params[info.m_nCloakFactor]->GetFloatValue() : kDefaultCloakFactor;
+	//float flRefractAmount = IS_PARAM_DEFINED( info.m_nRefractAmount ) ? params[info.m_nRefractAmount]->GetFloatValue() : kDefaultRefractAmount;
+
+	// NOTE: If this math changes, you need to update the pixel shader code!
+	float flFresnel = 1.0f - ( 0.0f ); // Assume V.N = 0.0f;
+	float flCloakLerpFactor = clamp( Lerp( clamp( flCloakFactor, 0.0f, 1.0f ), 1.0f, flFresnel - 1.35f ), 0.0f, 1.0f );
+	//flCloakLerpFactor = 1.0f - smoothstep( 0.4f, 0.425f, flCloakLerpFactor );
+
+	if ( flCloakLerpFactor <= 0.4f )
+		return true;
+
+	return false;
+}