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StandardLightVisualiser.cpp
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//////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2015, John Haddon. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above
// copyright notice, this list of conditions and the following
// disclaimer.
//
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided with
// the distribution.
//
// * Neither the name of John Haddon nor the names of
// any other contributors to this software may be used to endorse or
// promote products derived from this software without specific prior
// written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
//////////////////////////////////////////////////////////////////////////
#include "GafferSceneUI/StandardLightVisualiser.h"
#include "Gaffer/Metadata.h"
#include "IECoreGL/CurvesPrimitive.h"
#include "IECoreGL/DiskPrimitive.h"
#include "IECoreGL/Group.h"
#include "IECoreGL/QuadPrimitive.h"
#include "IECoreGL/ShaderLoader.h"
#include "IECoreGL/ShaderStateComponent.h"
#include "IECoreGL/SpherePrimitive.h"
#include "IECoreGL/TextureLoader.h"
#include "IECoreGL/ToGLMeshConverter.h"
#include "IECoreScene/MeshPrimitive.h"
#include "IECoreScene/Shader.h"
using namespace std;
using namespace boost;
using namespace Imath;
using namespace IECore;
using namespace IECoreScene;
using namespace IECoreGL;
using namespace Gaffer;
using namespace GafferSceneUI;
using namespace IECoreGLPreview;
//////////////////////////////////////////////////////////////////////////
// Utility methods. We define these in an anonymouse namespace rather
// than clutter up the header with private methods.
//////////////////////////////////////////////////////////////////////////
namespace
{
const Color3f g_lightWireframeColor = Color3f( 1.0f, 0.835f, 0.07f );
const Color4f g_lightWireframeColor4 = Color4f( g_lightWireframeColor.x, g_lightWireframeColor.y, g_lightWireframeColor.z, 1.0f );
const Color3f g_mutedLightWireframeColor = Color3f( 0.137f, 0.137f, 0.137f );
const Color4f g_mutedLightWireframeColor4 = Color4f( g_mutedLightWireframeColor.x, g_mutedLightWireframeColor.y, g_mutedLightWireframeColor.z, 1.0f );
enum Axis { X, Y, Z };
IECore::InternedString metadataTargetForNetwork( const IECore::InternedString &attributeName, const IECoreScene::ShaderNetwork *shaderNetwork )
{
const IECoreScene::Shader *shader = shaderNetwork->outputShader();
return attributeName.string() + ":" + shader->getName();
}
template<typename T>
T parameter( InternedString metadataTarget, const IECore::CompoundData *parameters, InternedString parameterNameMetadata, T defaultValue )
{
ConstStringDataPtr parameterName = Metadata::value<StringData>( metadataTarget, parameterNameMetadata );
if( !parameterName )
{
return defaultValue;
}
using DataType = IECore::TypedData<T>;
if( const DataType *parameterData = parameters->member<DataType>( parameterName->readable() ) )
{
return parameterData->readable();
}
return defaultValue;
}
void addRay( const V3f &start, const V3f &end, vector<int> &vertsPerCurve, vector<V3f> &p, float arrowScale = 0.05f )
{
const V3f dir = end - start;
V3f perp = dir % V3f( 1, 0, 0 );
if( perp.length() == 0.0f )
{
perp = dir % V3f( 0, 1, 0 );
}
p.push_back( start );
p.push_back( end );
vertsPerCurve.push_back( 2 );
p.push_back( end + arrowScale * ( perp * 2 - dir * 3 ) );
p.push_back( end );
p.push_back( end + arrowScale * ( perp * -2 - dir * 3 ) );
vertsPerCurve.push_back( 3 );
}
void addCircle( Axis axis, const V3f ¢er, float radius, vector<int> &vertsPerCurve, vector<V3f> &p )
{
const int numDivisions = 100;
for( int i = 0; i < numDivisions; ++i )
{
const float angle = 2 * M_PI * (float)i/(float)(numDivisions-1);
if( axis == Axis::Z )
{
p.push_back( center + radius * V3f( cos( angle ), sin( angle ), 0 ) );
}
else if( axis == Axis::X )
{
p.push_back( center + radius * V3f( 0, cos( angle ), sin( angle ) ) );
}
else
{
p.push_back( center + radius * V3f( cos( angle ), 0, sin( angle ) ) );
}
}
vertsPerCurve.push_back( numDivisions );
}
void addSolidArc( Axis axis, const V3f ¢er, float majorRadius, float minorRadius, float startFraction, float stopFraction, vector<int> &vertsPerPoly, vector<int> &vertIds, vector<V3f> &p )
{
const int numSegmentsForCircle = 100;
int numSegments = max( 1, (int)ceil( (stopFraction - startFraction) * numSegmentsForCircle ) );
int start = p.size();
for( int i = 0; i < numSegments + 1; ++i )
{
const float angle = 2 * M_PI * ( startFraction + (stopFraction - startFraction) * (float)i/(float)(numSegments) );
V3f dir( -sin( angle ), cos( angle ), 0 );
if( axis == Axis::X ) dir = V3f( 0, dir[1], -dir[0] );
else if( axis == Axis::Y ) dir = V3f( dir[1], 0, dir[0] );
p.push_back( center + majorRadius * dir );
p.push_back( center + minorRadius * dir );
}
for( int i = 0; i < numSegments; ++i )
{
vertIds.push_back( start + i * 2 );
vertIds.push_back( start + i * 2 + 1);
vertIds.push_back( start + i * 2 + 3);
vertIds.push_back( start + i * 2 + 2);
vertsPerPoly.push_back( 4 );
}
}
void addCone( float angle, float startRadius, vector<int> &vertsPerCurve, vector<V3f> &p, float length, bool spokes )
{
const float halfAngle = 0.5 * M_PI * angle / 180.0;
const float baseRadius = length * sin( halfAngle );
const float baseDistance = length * cos( halfAngle );
if( startRadius > 0 )
{
addCircle( Axis::Z, V3f( 0 ), startRadius, vertsPerCurve, p );
}
addCircle( Axis::Z, V3f( 0, 0, -baseDistance ), baseRadius + startRadius, vertsPerCurve, p );
if( spokes )
{
p.push_back( V3f( 0, startRadius, 0 ) );
p.push_back( V3f( 0, baseRadius + startRadius, -baseDistance ) );
vertsPerCurve.push_back( 2 );
p.push_back( V3f( startRadius, 0, 0 ) );
p.push_back( V3f( baseRadius + startRadius, 0, -baseDistance ) );
vertsPerCurve.push_back( 2 );
p.push_back( V3f( 0, -startRadius, 0 ) );
p.push_back( V3f( 0, -baseRadius - startRadius, -baseDistance ) );
vertsPerCurve.push_back( 2 );
p.push_back( V3f( -startRadius, 0, 0 ) );
p.push_back( V3f( -baseRadius - startRadius, 0, -baseDistance ) );
vertsPerCurve.push_back( 2 );
}
}
void addAreaSpread( float spread, vector<int> &vertsPerCurve, vector<V3f> &p )
{
// Simple spaced parallel arrows that diverge by 45 degrees as spread approaches 1.
static const float scale = 0.2f;
const float spreadOffset = min( 1.0f, max( 0.0f, spread ) );
// Offset the arrows from the center a little
const V3f bl = V3f( -0.1f, -0.1f, 0.0f );
const V3f tl = V3f( -0.1f, 0.1f, 0.0f );
const V3f br = V3f( 0.1f, -0.1f, 0.0f );
const V3f tr = V3f( 0.1f, 0.1f, 0.0f );
addRay( bl, bl + scale * V3f( -spreadOffset, -spreadOffset, -1.0f ).normalized(), vertsPerCurve, p );
addRay( tl, tl + scale * V3f( -spreadOffset, spreadOffset, -1.0f ).normalized(), vertsPerCurve, p );
addRay( br, br + scale * V3f( spreadOffset, -spreadOffset, -1.0f ).normalized(), vertsPerCurve, p );
addRay( tr, tr + scale * V3f( spreadOffset, spreadOffset, -1.0f ).normalized(), vertsPerCurve, p );
}
// Shaders
const char *constantFragSource()
{
return
"#version 120\n"
""
"#if __VERSION__ <= 120\n"
"#define in varying\n"
"#endif\n"
""
"#include \"IECoreGL/ColorAlgo.h\"\n"
""
"in vec3 fragmentCs;"
""
"uniform vec3 tint;"
""
"void main()"
"{"
" gl_FragColor = vec4( fragmentCs * tint, 1 );"
"}"
;
}
const char *texturedConstantFragSource()
{
return
"#version 120\n"
""
"#if __VERSION__ <= 120\n"
"#define in varying\n"
"#endif\n"
""
"#include \"IECoreGL/ColorAlgo.h\"\n"
""
"in vec2 fragmentuv;"
"uniform sampler2D texture;"
"uniform vec3 tint;"
""
"void main()"
"{"
"vec3 c = texture2D( texture, fragmentuv ).xyz;"
"gl_FragColor = vec4( c * tint, 1.0 );"
"}"
;
}
const char *faceCameraVertexSource()
{
return
"#version 120\n"
""
"#if __VERSION__ <= 120\n"
"#define in attribute\n"
"#define out varying\n"
"#endif\n"
""
"uniform int aimType;"
""
"uniform vec3 Cs = vec3( 1, 1, 1 );"
"uniform bool vertexCsActive = false;"
""
"in vec3 vertexP;"
"in vec3 vertexN;"
"in vec2 vertexuv;"
"in vec3 vertexCs;"
""
"out vec3 geometryI;"
"out vec3 geometryP;"
"out vec3 geometryN;"
"out vec2 geometryuv;"
"out vec3 geometryCs;"
""
"out vec3 fragmentI;"
"out vec3 fragmentP;"
"out vec3 fragmentN;"
"out vec2 fragmentuv;"
"out vec3 fragmentCs;"
""
"void main()"
"{"
""
""
" vec3 aimedXAxis, aimedYAxis, aimedZAxis;"
" if( aimType == 0 )"
" {"
" vec4 viewDirectionInObjectSpace = gl_ModelViewMatrixInverse * vec4( 0, 0, -1, 0 );"
" vec3 viewCross = cross( viewDirectionInObjectSpace.xyz, vec3( 0, 0, -1 ) );"
" aimedYAxis = length( viewCross ) > 0.0001 ? normalize( viewCross ) : vec3( 1, 0, 0 );"
" aimedXAxis = normalize( cross( aimedYAxis, vec3( 0, 0, -1 ) ) );"
" aimedZAxis = vec3( 0, 0, 1 );"
" }"
" else"
" {"
" aimedXAxis = normalize( gl_ModelViewMatrixInverse * vec4( 0, 0, -1, 0 ) ).xyz;"
" aimedYAxis = normalize( gl_ModelViewMatrixInverse * vec4( 0, 1, 0, 0 ) ).xyz;"
" aimedZAxis = normalize( gl_ModelViewMatrixInverse * vec4( 1, 0, 0, 0 ) ).xyz;"
" }"
""
" vec3 pAimed = vertexP.x * aimedXAxis + vertexP.y * aimedYAxis + vertexP.z * aimedZAxis;"
""
" vec4 pCam = gl_ModelViewMatrix * vec4( pAimed, 1 );"
" gl_Position = gl_ProjectionMatrix * pCam;"
" geometryP = pCam.xyz;"
" geometryN = normalize( gl_NormalMatrix * vertexN );"
" if( gl_ProjectionMatrix[2][3] != 0.0 )"
" {"
" geometryI = normalize( -pCam.xyz );"
" }"
" else"
" {"
" geometryI = vec3( 0, 0, -1 );"
" }"
""
" geometryuv = vertexuv;"
" geometryCs = mix( Cs, vertexCs, float( vertexCsActive ) );"
""
" fragmentI = geometryI;"
" fragmentP = geometryP;"
" fragmentN = geometryN;"
" fragmentuv = geometryuv;"
" fragmentCs = geometryCs;"
"}"
;
}
// Shader state helpers
void addWireframeCurveState( IECoreGL::Group *group, float lineWidthScale = 1.0f )
{
group->getState()->add( new IECoreGL::Primitive::DrawWireframe( false ) );
group->getState()->add( new IECoreGL::Primitive::DrawSolid( true ) );
group->getState()->add( new IECoreGL::CurvesPrimitive::UseGLLines( true ) );
group->getState()->add( new IECoreGL::CurvesPrimitive::GLLineWidth( 1.5f * lineWidthScale ) );
group->getState()->add( new IECoreGL::LineSmoothingStateComponent( true ) );
}
void addConstantShader( IECoreGL::Group *group, const Imath::Color3f &tint, int aimType = -1 )
{
IECore::CompoundObjectPtr parameters = new CompoundObject;
if( aimType > -1 )
{
parameters->members()["aimType"] = new IntData( aimType );
}
parameters->members()["tint"] = new Color3fData( tint );
group->getState()->add(
new IECoreGL::ShaderStateComponent(
ShaderLoader::defaultShaderLoader(),
TextureLoader::defaultTextureLoader(),
aimType > -1 ? faceCameraVertexSource() : "",
"",
constantFragSource(),
parameters
)
);
}
void addConstantShader( IECoreGL::Group *group, int aimType = -1 )
{
addConstantShader( group, Color3f( 1.0f ), aimType );
}
void addTexturedConstantShader( IECoreGL::Group *group, IECore::ConstDataPtr textureData, const Color3f &tint, int maxTextureResolution )
{
IECore::CompoundObjectPtr shaderParameters = new CompoundObject;
shaderParameters->members()["texture"] = const_cast<Data *>( textureData.get() );
shaderParameters->members()["texture:maxResolution"] = new IntData( maxTextureResolution );
shaderParameters->members()["tint"] = new Color3fData( tint );
group->getState()->add(
new IECoreGL::ShaderStateComponent(
ShaderLoader::defaultShaderLoader(),
TextureLoader::defaultTextureLoader(),
"",
"",
texturedConstantFragSource(),
shaderParameters
)
);
}
// Customized IECoreGL primitive supporting `uvOrientation`
class UVOrientedQuadPrimitive : public IECoreGL::QuadPrimitive
{
public :
UVOrientedQuadPrimitive( float width, float height, const M33f &uvOrientation ) : IECoreGL::QuadPrimitive( width, height )
{
IECore::V2fVectorDataPtr uvData = new IECore::V2fVectorData;
vector<V2f> &uvVector = uvData->writable();
uvVector.push_back( V2f( -0.5f, -0.5f ) * uvOrientation + V2f( 0.5f, 0.5f ) );
uvVector.push_back( V2f( 0.5f, -0.5f ) * uvOrientation + V2f( 0.5f, 0.5f ) );
uvVector.push_back( V2f( 0.5f, 0.5f ) * uvOrientation + V2f( 0.5f, 0.5f ) );
uvVector.push_back( V2f( -0.5f, 0.5f ) * uvOrientation + V2f( 0.5f, 0.5f ) );
addVertexAttribute( "uv", uvData );
}
~UVOrientedQuadPrimitive() override
{
}
};
IE_CORE_DECLAREPTR( UVOrientedQuadPrimitive );
const InternedString g_typeString( "type" );
const InternedString g_colorParameterString( "colorParameter" );
const InternedString g_tintParameterString( "tintParameter" );
const InternedString g_glVisualiserScaleString( "gl:visualiser:scale" );
const InternedString g_glLightFrustumScaleString( "gl:light:frustumScale" );
const InternedString g_glLightDrawingModeString( "gl:light:drawingMode" );
const InternedString g_glVisualiserMaxTextureResolutionString( "gl:visualiser:maxTextureResolution" );
const InternedString g_lightMuteString( "light:mute" );
const InternedString g_coneAngleParameterString( "coneAngleParameter" );
const InternedString g_radiusParameterString( "radiusParameter" );
const InternedString g_uvOrientationString( "uvOrientation" );
const InternedString g_widthParameterString( "widthParameter" );
const InternedString g_heightParameterString( "heightParameter" );
const InternedString g_portalParameterString( "portalParameter" );
const InternedString g_spreadParameterString( "spreadParameter" );
const InternedString g_lengthParameterString( "lengthParameter" );
const InternedString g_visualiserOrientationString( "visualiserOrientation" );
} // namespace
//////////////////////////////////////////////////////////////////////////
// StandardLightVisualiser implementation.
//////////////////////////////////////////////////////////////////////////
// Register as the standard fallback visualiser.
LightVisualiser::LightVisualiserDescription<StandardLightVisualiser> StandardLightVisualiser::g_description( "light *:light", "*" );
StandardLightVisualiser::StandardLightVisualiser()
{
}
StandardLightVisualiser::~StandardLightVisualiser()
{
}
Visualisations StandardLightVisualiser::visualise( const IECore::InternedString &attributeName, const IECoreScene::ShaderNetwork *shaderNetwork, const IECore::CompoundObject *attributes, IECoreGL::ConstStatePtr &state ) const
{
const InternedString metadataTarget = metadataTargetForNetwork( attributeName, shaderNetwork );
const IECore::CompoundData *shaderParameters = shaderNetwork->outputShader()->parametersData();
ConstStringDataPtr type = Metadata::value<StringData>( metadataTarget, g_typeString );
const Color3f color = parameter<Color3f>( metadataTarget, shaderParameters, g_colorParameterString, Color3f( 1.0f ) );
const Color3f tint = parameter<Color3f>( metadataTarget, shaderParameters, g_tintParameterString, Color3f( 1.0f ) );
const FloatData *visualiserScaleData = attributes->member<FloatData>( g_glVisualiserScaleString );
const float visualiserScale = visualiserScaleData ? visualiserScaleData->readable() : 1.0;
const FloatData *frustumScaleData = attributes->member<FloatData>( g_glLightFrustumScaleString );
const float frustumScale = frustumScaleData ? frustumScaleData->readable() : 1.0;
const StringData *visualiserDrawingModeData = attributes->member<StringData>( g_glLightDrawingModeString );
const std::string visualiserDrawingMode = visualiserDrawingModeData ? visualiserDrawingModeData->readable() : "texture";
const bool drawShaded = visualiserDrawingMode != "wireframe";
const bool drawTextured = visualiserDrawingMode == "texture";
const IntData *maxTextureResolutionData = attributes->member<IntData>( g_glVisualiserMaxTextureResolutionString );
const int maxTextureResolution = maxTextureResolutionData ? maxTextureResolutionData->readable() : std::numeric_limits<int>::max();
const BoolData *muteData = attributes->member<BoolData>( g_lightMuteString );
const bool muted = muteData ? muteData->readable() : false;
Visualisations result;
// A shared curves primitive for ornament wireframes
V3fVectorDataPtr ornamentWireframePoints = new V3fVectorData();
IntVectorDataPtr ornamentWireframeVertsPerCurve = new IntVectorData();
// UsdLux allows a shaping cone to be applied to _any_ light, so we visualise those here
// before dealing with specific light types.
const bool haveCone =
( type && type->readable() == "spot" ) ||
parameter<float>( metadataTarget, shaderParameters, g_coneAngleParameterString, -1.0f ) >= 0.0f
;
if( haveCone )
{
float innerAngle, outerAngle, radius, lensRadius;
spotlightParameters( attributeName, shaderNetwork, innerAngle, outerAngle, radius, lensRadius );
result.push_back( Visualisation::createOrnament(
spotlightCone( innerAngle, outerAngle, lensRadius / visualiserScale, 1.0f, 1.0f, muted ),
/* affectsFramingBound = */ true
) );
result.push_back( Visualisation::createFrustum(
spotlightCone( innerAngle, outerAngle, lensRadius / visualiserScale, 10.0f * frustumScale, 0.5f, muted ),
Visualisation::Scale::Visualiser
) );
}
// Now do visualisations based on light type.
if( type && type->readable() == "environment" )
{
if( drawShaded )
{
ConstDataPtr textureData = drawTextured ? surfaceTexture( attributeName, shaderNetwork, attributes, maxTextureResolution ) : nullptr;
result.push_back( Visualisation::createOrnament(
environmentSphereSurface( textureData, tint, maxTextureResolution, color ),
/* affectsFramingBound = */ true, Visualisation::ColorSpace::Scene
) );
}
result.push_back( Visualisation::createOrnament(
sphereWireframe( 1.05f, Vec3<bool>( true ), 1.0f, V3f( 0.0f ), muted ),
/* affectsFramingBound = */ true
) );
}
else if( type && type->readable() == "spot" )
{
const float radius = parameter<float>( metadataTarget, shaderParameters, g_radiusParameterString, 0.0f );
result.push_back( Visualisation(
sphereWireframe( radius, Vec3<bool>( false, false, true ), 0.5f, V3f( 0.0f, 0.0f, 0.1f * visualiserScale ), muted ),
Visualisation::Scale::None
) );
addRay( V3f( 0 ), V3f( 0, 0, -1 ), ornamentWireframeVertsPerCurve->writable(), ornamentWireframePoints->writable() );
result.push_back( Visualisation::createOrnament( colorIndicator( color ), /* affectsFramingBound = */ false, Visualisation::ColorSpace::Scene ) );
}
else if( type && type->readable() == "distant" )
{
result.push_back( Visualisation::createOrnament( distantRays( muted ), /* affectsFramingBound = */ true ) );
result.push_back( Visualisation::createOrnament( colorIndicator( color ), /* affectsFramingBound = */ false, Visualisation::ColorSpace::Scene ) );
}
else if( type && type->readable() == "quad" )
{
ConstM33fDataPtr uvOrientation = Metadata::value<M33fData>( metadataTarget, g_uvOrientationString );
const V2f size(
parameter<float>( metadataTarget, shaderParameters, g_widthParameterString, 2.0f ),
parameter<float>( metadataTarget, shaderParameters, g_heightParameterString, 2.0f )
);
// Cycles/Arnold define portals via a parameter on a quad, rather than as it's own light type.
if( parameter<bool>( metadataTarget, shaderParameters, g_portalParameterString, false ) )
{
// Because we don't support variable size lights, we keep a fixed hatching scale
result.push_back( Visualisation::createGeometry( quadPortal( size, /* hatchingScale = */ 1.0f, muted ) ) );
}
else
{
if( drawShaded )
{
ConstDataPtr textureData = drawTextured ? surfaceTexture( attributeName, shaderNetwork, attributes, maxTextureResolution ) : nullptr;
result.push_back( Visualisation::createGeometry(
quadSurface( size, textureData, tint, maxTextureResolution, color, uvOrientation ? uvOrientation->readable() : M33f() ),
Visualisation::ColorSpace::Scene
) );
}
else
{
result.push_back( Visualisation::createOrnament( colorIndicator( color * tint ), /* affectsFramingBound = */ true, Visualisation::ColorSpace::Scene ) );
}
result.push_back( Visualisation::createGeometry( quadWireframe( size, muted ) ) );
const float spread = parameter<float>( metadataTarget, shaderParameters, g_spreadParameterString, -1 );
if( spread >= 0.0f )
{
addAreaSpread( spread, ornamentWireframeVertsPerCurve->writable(), ornamentWireframePoints->writable() );
}
}
addRay( V3f( 0 ), V3f( 0, 0, -1 ), ornamentWireframeVertsPerCurve->writable(), ornamentWireframePoints->writable() );
}
else if( type && type->readable() == "disk" )
{
float radius = parameter<float>( metadataTarget, shaderParameters, g_widthParameterString, 2.0f ) / 2.0f;
radius = parameter<float>( metadataTarget, shaderParameters, g_radiusParameterString, radius );
if( drawShaded )
{
ConstDataPtr textureData = drawTextured ? surfaceTexture( attributeName, shaderNetwork, attributes, maxTextureResolution ) : nullptr;
result.push_back( Visualisation::createGeometry(
diskSurface( radius, textureData, tint, maxTextureResolution, color ),
Visualisation::ColorSpace::Scene
) );
}
else
{
result.push_back( Visualisation::createOrnament( colorIndicator( color * tint ), /* affectsFramingBound = */ false, Visualisation::ColorSpace::Scene ) );
}
result.push_back( Visualisation::createGeometry( diskWireframe( radius, muted ) ) );
addRay( V3f( 0 ), V3f( 0, 0, -1 ), ornamentWireframeVertsPerCurve->writable(), ornamentWireframePoints->writable() );
const float spread = parameter<float>( metadataTarget, shaderParameters, g_spreadParameterString, -1 );
if( spread >= 0.0f )
{
addAreaSpread( spread, ornamentWireframeVertsPerCurve->writable(), ornamentWireframePoints->writable() );
}
}
else if( type && type->readable() == "cylinder" )
{
const float radius = parameter<float>( metadataTarget, shaderParameters, g_radiusParameterString, 1 );
const float length = parameter<float>( metadataTarget, shaderParameters, g_lengthParameterString, 2 );
result.push_back( Visualisation::createOrnament( cylinderRays( radius, muted ), /* affectsFramingBound = */ false ) );
result.push_back( Visualisation::createGeometry( cylinderWireframe( radius, length, muted ) ) );
if( drawShaded )
{
result.push_back( Visualisation::createGeometry( cylinderSurface( radius, length, color * tint ), Visualisation::ColorSpace::Scene ) );
}
else
{
result.push_back( Visualisation::createOrnament( colorIndicator( color * tint ), /* affectsFramingBound = */ false, Visualisation::ColorSpace::Scene ) );
}
}
else if( type && type->readable() == "mesh" )
{
// There isn't any meaningful place to draw anything for the mesh
// light, so instead we make the mesh outline visible and light coloured.
IECoreGL::StatePtr meshState = new IECoreGL::State( false );
meshState->add( new IECoreGL::Primitive::DrawSolid( false ) );
meshState->add( new IECoreGL::Primitive::DrawOutline( true ) );
meshState->add( new IECoreGL::Primitive::OutlineWidth( 2.0f ) );
meshState->add( new IECoreGL::OutlineColorStateComponent( muted ? g_mutedLightWireframeColor4 : g_lightWireframeColor4 ) );
state = meshState;
}
else if( type && type->readable() == "photometric" )
{
const float radius = parameter<float>( metadataTarget, shaderParameters, g_radiusParameterString, 0 );
if( radius > 0 )
{
result.push_back( Visualisation(
sphereWireframe( radius, Vec3<bool>( true, false, true ), 0.5f, V3f( 0.0f ), muted ),
Visualisation::Scale::None
) );
}
result.push_back( Visualisation::createOrnament( colorIndicator( color ), /* affectsFramingBound = */ false, Visualisation::ColorSpace::Scene ) );
addRay( V3f( 0 ), V3f( 0, 0, -1 ), ornamentWireframeVertsPerCurve->writable(), ornamentWireframePoints->writable() );
}
else
{
// Treat everything else as a point light.
const float radius = parameter<float>( metadataTarget, shaderParameters, g_radiusParameterString, 0 );
if( radius > 0 )
{
result.push_back( Visualisation( pointShape( radius, muted ), Visualisation::Scale::None ) );
}
if( !haveCone )
{
result.push_back( Visualisation::createOrnament( pointRays( radius / visualiserScale, muted ), /* affectsFramingBound = */ true ) );
}
result.push_back( Visualisation::createOrnament( colorIndicator( color ), /* affectsFramingBound = */ false, Visualisation::ColorSpace::Scene ) );
}
if( ornamentWireframePoints->readable().size() > 0 )
{
IECoreGL::CurvesPrimitivePtr curves = new IECoreGL::CurvesPrimitive( IECore::CubicBasisf::linear(), false, ornamentWireframeVertsPerCurve );
curves->addPrimitiveVariable( "P", IECoreScene::PrimitiveVariable( IECoreScene::PrimitiveVariable::Vertex, ornamentWireframePoints ) );
curves->addPrimitiveVariable( "Cs", IECoreScene::PrimitiveVariable( IECoreScene::PrimitiveVariable::Constant, new Color3fData( muted ? g_mutedLightWireframeColor : g_lightWireframeColor ) ) );
result.push_back( Visualisation::createOrnament( curves, /* affectsFramingBound = */ false ) );
}
// Apply orientation corrective matrix if necessary.
if( auto orientation = Metadata::value<M44fData>( metadataTarget, g_visualiserOrientationString ) )
{
for( auto &v : result )
{
IECoreGL::GroupPtr group = new IECoreGL::Group;
group->addChild( boost::const_pointer_cast<IECoreGL::Renderable>( v.renderable ) );
group->setTransform( orientation->readable() );
v.renderable = group;
}
}
return result;
}
IECore::DataPtr StandardLightVisualiser::surfaceTexture( const IECore::InternedString &attributeName, const IECoreScene::ShaderNetwork *shaderNetwork, const IECore::CompoundObject *attributes, int maxTextureResolution ) const
{
const IECore::InternedString metadataTarget = metadataTargetForNetwork( attributeName, shaderNetwork );
const IECore::CompoundData *shaderParameters = shaderNetwork->outputShader()->parametersData();
const std::string textureName = parameter<std::string>( metadataTarget, shaderParameters, "textureNameParameter", "" );
if( !textureName.empty() )
{
return new IECore::StringData( textureName );
}
return nullptr;
}
void StandardLightVisualiser::spotlightParameters( const InternedString &attributeName, const IECoreScene::ShaderNetwork *shaderNetwork, float &innerAngle, float &outerAngle, float &radius, float &lensRadius )
{
InternedString metadataTarget = metadataTargetForNetwork( attributeName, shaderNetwork );
const IECore::CompoundData *shaderParameters = shaderNetwork->outputShader()->parametersData();
float coneAngle = parameter<float>( metadataTarget, shaderParameters, "coneAngleParameter", 0.0f );
float penumbraAngle = parameter<float>( metadataTarget, shaderParameters, "penumbraAngleParameter", 0.0f );
if( ConstStringDataPtr angleUnit = Metadata::value<StringData>( metadataTarget, "angleUnit" ) )
{
if( angleUnit->readable() == "radians" )
{
coneAngle *= 180.0 / M_PI;
penumbraAngle *= 180 / M_PI;
}
}
if( ConstStringDataPtr coneAngleType = Metadata::value<StringData>( metadataTarget, "coneAngleType" ) )
{
if( coneAngleType->readable() == "half" )
{
coneAngle *= 2;
}
}
innerAngle = 0;
outerAngle = 0;
ConstStringDataPtr penumbraTypeData = Metadata::value<StringData>( metadataTarget, "penumbraType" );
const std::string *penumbraType = penumbraTypeData ? &penumbraTypeData->readable() : nullptr;
if( !penumbraType || *penumbraType == "inset" )
{
outerAngle = coneAngle;
innerAngle = coneAngle - 2.0f * penumbraAngle;
}
else if( *penumbraType == "outset" )
{
outerAngle = coneAngle + 2.0f * penumbraAngle;
innerAngle = coneAngle ;
}
else if( *penumbraType == "absolute" )
{
outerAngle = coneAngle;
innerAngle = penumbraAngle;
}
lensRadius = 0.0f;
if( parameter<bool>( metadataTarget, shaderParameters, "lensRadiusEnableParameter", true ) )
{
lensRadius = parameter<float>( metadataTarget, shaderParameters, "lensRadiusParameter", 0.0f );
}
radius = parameter<float>( metadataTarget, shaderParameters, "radiusParameter", 0.0f );
}
IECoreGL::ConstRenderablePtr StandardLightVisualiser::ray( bool muted )
{
IECoreGL::GroupPtr group = new IECoreGL::Group();
addWireframeCurveState( group.get() );
addConstantShader( group.get(), 0 );
IntVectorDataPtr vertsPerCurve = new IntVectorData;
V3fVectorDataPtr p = new V3fVectorData;
addRay( V3f( 0 ), V3f( 0, 0, -1 ), vertsPerCurve->writable(), p->writable() );
IECoreGL::CurvesPrimitivePtr curves = new IECoreGL::CurvesPrimitive( IECore::CubicBasisf::linear(), false, vertsPerCurve );
curves->addPrimitiveVariable( "P", IECoreScene::PrimitiveVariable( IECoreScene::PrimitiveVariable::Vertex, p ) );
curves->addPrimitiveVariable( "Cs", IECoreScene::PrimitiveVariable( IECoreScene::PrimitiveVariable::Constant, new Color3fData( muted ? g_mutedLightWireframeColor : g_lightWireframeColor ) ) );
group->addChild( curves );
return group;
}
IECoreGL::ConstRenderablePtr StandardLightVisualiser::pointRays( float radius, bool muted )
{
IECoreGL::GroupPtr group = new IECoreGL::Group();
addWireframeCurveState( group.get() );
addConstantShader( group.get(), 1 );
IntVectorDataPtr vertsPerCurve = new IntVectorData;
V3fVectorDataPtr p = new V3fVectorData;
const int numRays = 8;
for( int i = 0; i < numRays; ++i )
{
const float angle = M_PI * 2.0f * float(i)/(float)numRays;
const V3f dir( 0.0, sin( angle ), -cos( angle ) );
addRay( dir * ( 0.2f + radius ), dir * ( 0.6f + radius ), vertsPerCurve->writable(), p->writable(), 0.1f );
}
IECoreGL::CurvesPrimitivePtr curves = new IECoreGL::CurvesPrimitive( IECore::CubicBasisf::linear(), false, vertsPerCurve );
curves->addPrimitiveVariable( "P", IECoreScene::PrimitiveVariable( IECoreScene::PrimitiveVariable::Vertex, p ) );
curves->addPrimitiveVariable( "Cs", IECoreScene::PrimitiveVariable( IECoreScene::PrimitiveVariable::Constant, new Color3fData( muted ? g_mutedLightWireframeColor : g_lightWireframeColor ) ) );
group->addChild( curves );
return group;
}
IECoreGL::ConstRenderablePtr StandardLightVisualiser::distantRays( bool muted )
{
GroupPtr result = new Group;
for( int i = 0; i < 3; i++ )
{
IECoreGL::GroupPtr rayGroup = new IECoreGL::Group();
Imath::M44f trans;
trans.rotate( V3f( 0, 0, 2.0 * M_PI / 3.0 * i ) );
trans.translate( V3f( 0, 0.4, 0.5 ) );
rayGroup->addChild( const_pointer_cast<IECoreGL::Renderable>( ray( muted ) ) );
rayGroup->setTransform( trans );
result->addChild( rayGroup );
}
return result;
}
IECoreGL::ConstRenderablePtr StandardLightVisualiser::spotlightCone( float innerAngle, float outerAngle, float lensRadius, float length, float lineWidthScale, bool muted )
{
IECoreGL::GroupPtr group = new IECoreGL::Group();
addWireframeCurveState( group.get(), lineWidthScale );
addConstantShader( group.get() );
IntVectorDataPtr vertsPerCurve = new IntVectorData;
V3fVectorDataPtr p = new V3fVectorData;
const bool drawSecondaryCone = fabs( innerAngle - outerAngle ) > 0.1;
addCone( innerAngle, lensRadius, vertsPerCurve->writable(), p->writable(), length, !drawSecondaryCone );
if( drawSecondaryCone )
{
addCone( outerAngle, lensRadius, vertsPerCurve->writable(), p->writable(), length, true );
}
IECoreGL::CurvesPrimitivePtr curves = new IECoreGL::CurvesPrimitive( IECore::CubicBasisf::linear(), false, vertsPerCurve );
curves->addPrimitiveVariable( "P", IECoreScene::PrimitiveVariable( IECoreScene::PrimitiveVariable::Vertex, p ) );
const Color3fDataPtr color = new Color3fData( lineWidthScale < 1.0f ? Color3f( 0.627f, 0.580f, 0.352f ) : ( muted ? g_mutedLightWireframeColor : g_lightWireframeColor ) );
curves->addPrimitiveVariable( "Cs", IECoreScene::PrimitiveVariable( IECoreScene::PrimitiveVariable::Constant, color ) );
group->addChild( curves );
return group;
}
IECoreGL::ConstRenderablePtr StandardLightVisualiser::colorIndicator( const Imath::Color3f &color )
{
IECoreGL::GroupPtr group = new IECoreGL::Group();
addConstantShader( group.get(), 1 );
const float indicatorRad = 0.1f;
{
IntVectorDataPtr vertsPerPoly = new IntVectorData;
IntVectorDataPtr vertIds = new IntVectorData;
V3fVectorDataPtr p = new V3fVectorData;
addSolidArc( Axis::X, V3f( 0 ), 0, indicatorRad, 0, 1, vertsPerPoly->writable(), vertIds->writable(), p->writable() );
IECoreScene::MeshPrimitivePtr mesh = new IECoreScene::MeshPrimitive( vertsPerPoly, vertIds, "linear", p );
mesh->variables["N"] = IECoreScene::PrimitiveVariable( IECoreScene::PrimitiveVariable::Constant, new V3fData( V3f( 0 ) ) );
mesh->variables["Cs"] = IECoreScene::PrimitiveVariable( IECoreScene::PrimitiveVariable::Constant, new Color3fData( color ) );
ToGLMeshConverterPtr meshConverter = new ToGLMeshConverter( mesh );
group->addChild( IECore::runTimeCast<IECoreGL::Renderable>( meshConverter->convert() ) );
}
return group;
}
IECoreGL::ConstRenderablePtr StandardLightVisualiser::cylinderWireframe( float radius, float length, bool muted )
{
IECoreGL::GroupPtr group = new IECoreGL::Group();
addWireframeCurveState( group.get() );
addConstantShader( group.get(), 0 );
const float halfLength = length / 2.0f;
IntVectorDataPtr vertsPerCurveData = new IntVectorData;
vector<int> &vertsPerCurve = vertsPerCurveData->writable();
V3fVectorDataPtr pData = new V3fVectorData;
vector<V3f> &p = pData->writable();
addCircle( Axis::Z, V3f( 0, 0, -halfLength ), radius, vertsPerCurve, p );
addCircle( Axis::Z, V3f( 0, 0, halfLength ), radius, vertsPerCurve, p );
p.push_back( V3f( 0, radius, -halfLength ) );
p.push_back( V3f( 0, radius, halfLength ) );
vertsPerCurve.push_back( 2 );
p.push_back( V3f( 0, -radius, -halfLength ) );
p.push_back( V3f( 0, -radius, halfLength ) );
vertsPerCurve.push_back( 2 );
IECoreGL::CurvesPrimitivePtr curves = new IECoreGL::CurvesPrimitive( IECore::CubicBasisf::linear(), false, vertsPerCurveData );
curves->addPrimitiveVariable( "P", IECoreScene::PrimitiveVariable( IECoreScene::PrimitiveVariable::Vertex, pData ) );
curves->addPrimitiveVariable( "Cs", IECoreScene::PrimitiveVariable( IECoreScene::PrimitiveVariable::Constant, new Color3fData( muted ? g_mutedLightWireframeColor : g_lightWireframeColor ) ) );
group->addChild( curves );
return group;
}
IECoreGL::ConstRenderablePtr StandardLightVisualiser::cylinderSurface( float radius, float length, const Color3f &color )
{
IECoreGL::GroupPtr group = new IECoreGL::Group();
addConstantShader( group.get(), 0 );
const float halfLength = length / 2.0f;
IntVectorDataPtr vertsPerPolyData = new IntVectorData;
IntVectorDataPtr vertIdsData = new IntVectorData;
V3fVectorDataPtr pData = new V3fVectorData;
vector<int> &vertIds = vertIdsData->writable();
vector<V3f> &p = pData->writable();
addSolidArc( Axis::Z, V3f( 0, 0, -halfLength ), radius, 0, 0, 1, vertsPerPolyData->writable(), vertIds, p );
addSolidArc( Axis::Z, V3f( 0, 0, halfLength ), radius, 0, 0, 1, vertsPerPolyData->writable(), vertIds, p );
size_t lastIndex = p.size();
p.push_back( V3f( 0, radius, -halfLength ) );
p.push_back( V3f( 0, radius, halfLength ) );
p.push_back( V3f( 0, -radius, halfLength ) );
p.push_back( V3f( 0, -radius, -halfLength ) );
vertIds.push_back( lastIndex++ );
vertIds.push_back( lastIndex++ );
vertIds.push_back( lastIndex++ );
vertIds.push_back( lastIndex );
vertsPerPolyData->writable().push_back( 4 );
IECoreScene::MeshPrimitivePtr mesh = new IECoreScene::MeshPrimitive( vertsPerPolyData, vertIdsData, "linear", pData );
mesh->variables["N"] = IECoreScene::PrimitiveVariable( IECoreScene::PrimitiveVariable::Constant, new V3fData( V3f( 0 ) ) );
mesh->variables["Cs"] = IECoreScene::PrimitiveVariable( IECoreScene::PrimitiveVariable::Constant, new Color3fData( color ) );
ToGLMeshConverterPtr meshConverter = new ToGLMeshConverter( mesh );
group->addChild( IECore::runTimeCast<IECoreGL::Renderable>( meshConverter->convert() ) );
return group;
}
IECoreGL::ConstRenderablePtr StandardLightVisualiser::pointShape( float radius, bool muted )
{
IECoreGL::GroupPtr group = new IECoreGL::Group();
addWireframeCurveState( group.get(), 0.5f );
addConstantShader( group.get(), 1 );
IntVectorDataPtr vertsPerCurveData = new IntVectorData;
V3fVectorDataPtr pData = new V3fVectorData;
addCircle( Axis::Z, V3f( 0 ), radius, vertsPerCurveData->writable(), pData->writable() );
M44f t = M44f().rotate( V3f( 0, M_PI * 0.5, 0 ) );
for( V3f &p : pData->writable() )
{
p *= t;
}
IECoreGL::CurvesPrimitivePtr curves = new IECoreGL::CurvesPrimitive( IECore::CubicBasisf::linear(), /* periodic = */ false, vertsPerCurveData );
curves->addPrimitiveVariable( "P", IECoreScene::PrimitiveVariable( IECoreScene::PrimitiveVariable::Vertex, pData ) );
curves->addPrimitiveVariable( "Cs", IECoreScene::PrimitiveVariable( IECoreScene::PrimitiveVariable::Constant, new Color3fData( muted ? g_mutedLightWireframeColor : g_lightWireframeColor ) ) );
group->addChild( curves );
return group;
}
/// \todo Expose publicly when we've decided what the
/// parameters should be.
IECoreGL::ConstRenderablePtr StandardLightVisualiser::cylinderRays( float radius, bool muted )
{
IECoreGL::GroupPtr group = new IECoreGL::Group();
addWireframeCurveState( group.get() );
addConstantShader( group.get(), 0 );
const int numRays = 8;
for( int i = 0; i < numRays; ++i )
{
GroupPtr rayGroup = new Group;
rayGroup->addChild( const_pointer_cast<IECoreGL::Renderable>( StandardLightVisualiser::ray( muted ) ) );