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Engine directory for ticket #1
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DavidWyand-GG
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210
Engine/source/forest/glsl/windDeformationGLSL.cpp
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210
Engine/source/forest/glsl/windDeformationGLSL.cpp
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//-----------------------------------------------------------------------------
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// Copyright (c) 2012 GarageGames, LLC
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to
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// deal in the Software without restriction, including without limitation the
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// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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// sell copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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// IN THE SOFTWARE.
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//-----------------------------------------------------------------------------
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#include "platform/platform.h"
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#include "forest/glsl/windDeformationGLSL.h"
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#include "forest/windDeformation.h"
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#include "forest/forestItem.h"
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#include "forest/forestWindMgr.h"
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#include "materials/sceneData.h"
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#include "scene/sceneRenderState.h"
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#include "shaderGen/shaderGen.h"
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#include "shaderGen/featureMgr.h"
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#include "shaderGen/langElement.h"
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#include "shaderGen/shaderOp.h"
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#include "shaderGen/shaderGenVars.h"
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#include "gfx/gfxStructs.h"
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#include "core/module.h"
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static void _onRegisterFeatures( GFXAdapterType type )
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{
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FEATUREMGR->registerFeature( MFT_WindEffect, new WindDeformationGLSL );
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}
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MODULE_BEGIN( WindDeformationGLSL )
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MODULE_INIT_AFTER( ShaderGen )
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MODULE_INIT
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{
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SHADERGEN->getFeatureInitSignal().notify( _onRegisterFeatures );
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}
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MODULE_END;
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WindDeformationGLSL::WindDeformationGLSL()
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: mDep( "shaders/common/gl/wind.glsl" )
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{
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addDependency( &mDep );
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}
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void WindDeformationGLSL::determineFeature( Material *material,
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const GFXVertexFormat *vertexFormat,
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U32 stageNum,
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const FeatureType &type,
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const FeatureSet &features,
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MaterialFeatureData *outFeatureData )
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{
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bool enabled = vertexFormat->hasColor() && features.hasFeature( MFT_WindEffect );
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outFeatureData->features.setFeature( type, enabled );
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}
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void WindDeformationGLSL::processVert( Vector<ShaderComponent*> &componentList,
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const MaterialFeatureData &fd )
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{
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MultiLine *meta = new MultiLine;
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output = meta;
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// We combined all the tree parameters into one float4 to
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// save constant space and reduce the memory copied to the
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// card.
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//
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// This in particular helps when we're instancing.
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//
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// .x = bend scale
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// .y = branch amplitude
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// .z = detail amplitude
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// .w = detail frequency
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//
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Var *windParams;
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if ( fd.features[MFT_UseInstancing] )
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{
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ShaderConnector *vertStruct = dynamic_cast<ShaderConnector *>( componentList[C_VERT_STRUCT] );
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windParams = vertStruct->getElement( RT_TEXCOORD );
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windParams->setName( "inst_windParams" );
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windParams->setType( "vec4" );
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mInstancingFormat->addElement( "windParams", GFXDeclType_Float4, windParams->constNum );
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}
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else
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{
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windParams = new Var( "windParams", "vec4" );
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windParams->uniform = true;
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windParams->constSortPos = cspPotentialPrimitive;
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}
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// If we're instancing then we need to instance the wind direction
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// and speed as its unique for each tree instance.
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Var *windDirAndSpeed;
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if ( fd.features[MFT_UseInstancing] )
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{
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ShaderConnector *vertStruct = dynamic_cast<ShaderConnector *>( componentList[C_VERT_STRUCT] );
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windDirAndSpeed = vertStruct->getElement( RT_TEXCOORD );
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windDirAndSpeed->setName( "inst_windDirAndSpeed" );
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windDirAndSpeed->setType( "vec3" );
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mInstancingFormat->addElement( "windDirAndSpeed", GFXDeclType_Float3, windDirAndSpeed->constNum );
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}
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else
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{
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windDirAndSpeed = new Var( "windDirAndSpeed", "vec3" );
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windDirAndSpeed->uniform = true;
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windDirAndSpeed->constSortPos = cspPrimitive;
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}
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Var *accumTime = (Var*)LangElement::find( "accumTime" );
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if ( !accumTime )
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{
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accumTime = new Var( "accumTime", "float" );
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accumTime->uniform = true;
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accumTime->constSortPos = cspPass;
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}
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// Get the transform to world space.
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Var *objTrans = getObjTrans( componentList, fd.features[MFT_UseInstancing], meta );
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// First check for an input position from a previous feature
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// then look for the default vertex position.
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Var *inPosition = (Var*)LangElement::find( "inPosition" );
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if ( !inPosition )
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inPosition = (Var*)LangElement::find( "position" );
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// Get the incoming color data
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Var *inColor = (Var*)LangElement::find( "diffuse" );
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// Do the branch and detail bending first so that
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// it can work in pure object space of the tree.
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LangElement *effect =
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new GenOp( "windBranchBending( "
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"@.xyz, " // vPos
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"normalize( normal ), " // vNormal
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"@, " // fTime
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"@.z, " // fWindSpeed
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"@.g, " // fBranchPhase
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"@.y, " // fBranchAmp
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"@.r, " // fBranchAtten
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"dot( @[3], vec4( 1.0 ) ), " // fDetailPhase
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"@.z, " // fDetailAmp
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"@.w, " // fDetailFreq
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"@.b )", // fEdgeAtten
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inPosition, // vPos
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// vNormal
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accumTime, // fTime
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windDirAndSpeed, // fWindSpeed
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inColor, // fBranchPhase
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windParams, // fBranchAmp
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inColor, // fBranchAtten
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objTrans, // fDetailPhase
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windParams, // fDetailAmp
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windParams, // fDetailFreq
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inColor ); // fEdgeAtten
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Var *outPosition = (Var*)LangElement::find( "inPosition" );
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if ( outPosition )
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meta->addStatement( new GenOp( " @.xyz = @;\r\n", outPosition, effect, inPosition ) );
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else
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{
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outPosition = new Var;
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outPosition->setType( "vec3" );
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outPosition->setName( "inPosition" );
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meta->addStatement( new GenOp(" vec3 inPosition = @;\r\n", effect, inPosition ) );
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}
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// Now do the trunk bending.
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effect = new GenOp( "windTrunkBending( @, @.xy, @.z * @.x )",
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outPosition, windDirAndSpeed, outPosition, windParams );
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meta->addStatement( new GenOp(" @ = @;\r\n", outPosition, effect ) );
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}
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ShaderFeatureConstHandles* WindDeformationGLSL::createConstHandles( GFXShader *shader, SimObject *userObject )
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{
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WindDeformationConstHandles *handles = new WindDeformationConstHandles();
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handles->init( shader );
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return handles;
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}
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66
Engine/source/forest/glsl/windDeformationGLSL.h
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66
Engine/source/forest/glsl/windDeformationGLSL.h
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@ -0,0 +1,66 @@
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//-----------------------------------------------------------------------------
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// Copyright (c) 2012 GarageGames, LLC
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to
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// deal in the Software without restriction, including without limitation the
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// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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// sell copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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// IN THE SOFTWARE.
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//-----------------------------------------------------------------------------
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#ifndef _FOREST_SHADERGEN_WINDDEFORMATIONGLSL_H_
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#define _FOREST_SHADERGEN_WINDDEFORMATIONGLSL_H_
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#ifndef _SHADERGEN_GLSL_SHADERFEATUREGLSL_H_
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#include "shaderGen/GLSL/shaderFeatureGLSL.h"
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#endif
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#ifndef _FEATURETYPE_H_
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#include "materials/materialFeatureTypes.h"
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#endif
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class GFXShaderConstHandle;
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class WindDeformationGLSL : public ShaderFeatureGLSL
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{
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protected:
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ShaderIncludeDependency mDep;
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public:
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WindDeformationGLSL();
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virtual void processVert( Vector<ShaderComponent*> &componentList,
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const MaterialFeatureData &fd );
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virtual String getName()
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{
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return "Wind Effect";
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}
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virtual void determineFeature( Material *material,
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const GFXVertexFormat *vertexFormat,
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U32 stageNum,
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const FeatureType &type,
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const FeatureSet &features,
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MaterialFeatureData *outFeatureData );
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virtual ShaderFeatureConstHandles* createConstHandles( GFXShader *shader, SimObject *userObject );
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};
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DeclareFeatureType( MFT_WindEffect );
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#endif // _FOREST_SHADERGEN_WINDDEFORMATIONGLSL_H_
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