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Merge pull request #621 from BeamNG/glsl_shadergen

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Update GLSL Shadergen.
This commit is contained in:
Thomas Fischer 2014-05-23 07:52:35 +02:00
commit c850d60a4f
22 changed files with 1946 additions and 1127 deletions
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65
Engine/source/forest/glsl/windDeformationGLSL.cpp
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@ -40,6 +40,9 @@
static void _onRegisterFeatures( GFXAdapterType type )
{
if ( type != OpenGL )
return;
FEATUREMGR->registerFeature( MFT_WindEffect, new WindDeformationGLSL );
}
@ -83,29 +86,14 @@ void WindDeformationGLSL::processVert( Vector<ShaderComponent*> &componentList,
// save constant space and reduce the memory copied to the
// card.
//
// This in particular helps when we're instancing.
//
// .x = bend scale
// .y = branch amplitude
// .z = detail amplitude
// .w = detail frequency
//
Var *windParams;
if ( fd.features[MFT_UseInstancing] )
{
ShaderConnector *vertStruct = dynamic_cast<ShaderConnector *>( componentList[C_VERT_STRUCT] );
windParams = vertStruct->getElement( RT_TEXCOORD );
windParams->setName( "inst_windParams" );
windParams->setType( "vec4" );
mInstancingFormat->addElement( "windParams", GFXDeclType_Float4, windParams->constNum );
}
else
{
windParams = new Var( "windParams", "vec4" );
Var *windParams = new Var( "windParams", "vec4" );
windParams->uniform = true;
windParams->constSortPos = cspPotentialPrimitive;
}
// If we're instancing then we need to instance the wind direction
// and speed as its unique for each tree instance.
@ -114,6 +102,7 @@ void WindDeformationGLSL::processVert( Vector<ShaderComponent*> &componentList,
{
ShaderConnector *vertStruct = dynamic_cast<ShaderConnector *>( componentList[C_VERT_STRUCT] );
windDirAndSpeed = vertStruct->getElement( RT_TEXCOORD );
windDirAndSpeed->setStructName( "IN" );
windDirAndSpeed->setName( "inst_windDirAndSpeed" );
windDirAndSpeed->setType( "vec3" );
@ -143,16 +132,31 @@ void WindDeformationGLSL::processVert( Vector<ShaderComponent*> &componentList,
if ( !inPosition )
inPosition = (Var*)LangElement::find( "position" );
// Copy the input position to the output first as
// the wind effects are conditional.
Var *outPosition = (Var*)LangElement::find( "inPosition" );
if ( !outPosition )
{
outPosition = new Var;
outPosition->setType( "vec3" );
outPosition->setName( "inPosition" );
meta->addStatement( new GenOp(" @ = @.xyz;\r\n", new DecOp( outPosition ), inPosition ) );
}
// Get the incoming color data
Var *inColor = (Var*)LangElement::find( "diffuse" );
// Do a dynamic branch based on wind force.
if ( GFX->getPixelShaderVersion() >= 3.0f )
meta->addStatement( new GenOp(" if ( any( bvec3(@) ) ) {\r\n", windDirAndSpeed ) );
// Do the branch and detail bending first so that
// it can work in pure object space of the tree.
LangElement *effect =
new GenOp( "windBranchBending( "
"@.xyz, " // vPos
"normalize( normal ), " // vNormal
"@, " // vPos
"normalize( IN_normal ), " // vNormal
"@, " // fTime
"@.z, " // fWindSpeed
@ -161,13 +165,13 @@ void WindDeformationGLSL::processVert( Vector<ShaderComponent*> &componentList,
"@.y, " // fBranchAmp
"@.r, " // fBranchAtten
"dot( @[3], vec4( 1.0 ) ), " // fDetailPhase
"dot( @[3], vec4(1) ), " // fDetailPhase
"@.z, " // fDetailAmp
"@.w, " // fDetailFreq
"@.b )", // fEdgeAtten
inPosition, // vPos
outPosition, // vPos
// vNormal
accumTime, // fTime
@ -183,22 +187,15 @@ void WindDeformationGLSL::processVert( Vector<ShaderComponent*> &componentList,
inColor ); // fEdgeAtten
Var *outPosition = (Var*)LangElement::find( "inPosition" );
if ( outPosition )
meta->addStatement( new GenOp( " @.xyz = @;\r\n", outPosition, effect, inPosition ) );
else
{
outPosition = new Var;
outPosition->setType( "vec3" );
outPosition->setName( "inPosition" );
meta->addStatement( new GenOp(" vec3 inPosition = @;\r\n", effect, inPosition ) );
}
meta->addStatement( new GenOp( " @ = @;\r\n", outPosition, effect ) );
// Now do the trunk bending.
effect = new GenOp( "windTrunkBending( @, @.xy, @.z * @.x )",
outPosition, windDirAndSpeed, outPosition, windParams );
meta->addStatement( new GenOp(" @ = windTrunkBending( @, @.xy, @.z * @.x );\r\n",
outPosition, outPosition, windDirAndSpeed, outPosition, windParams ) );
meta->addStatement( new GenOp(" @ = @;\r\n", outPosition, effect ) );
// End the dynamic branch.
if ( GFX->getPixelShaderVersion() >= 3.0f )
meta->addStatement( new GenOp(" } // [branch]\r\n" ) );
}
ShaderFeatureConstHandles* WindDeformationGLSL::createConstHandles( GFXShader *shader, SimObject *userObject )