SplineRenderer.h

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/*
Copyright 2007-2025. Algoryx Simulation AB.
 
All AGX source code, intellectual property, documentation, sample code,
tutorials, scene files and technical white papers, are copyrighted, proprietary
and confidential material of Algoryx Simulation AB. You may not download, read,
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material unless having a written signed agreement with Algoryx Simulation AB, or having been
advised so by Algoryx Simulation AB for a time limited evaluation, or having purchased a
valid commercial license from Algoryx Simulation AB.
 
Algoryx Simulation AB disclaims all responsibilities for loss or damage caused
from using this software, unless otherwise stated in written agreements with
Algoryx Simulation AB.
*/
 
#pragma once
 
 
#include <agxOSG/export.h>
#include <agxOSG/Node.h>
 
#include <agxUtil/Spline.h>
 
#include <agxSDK/StepEventListener.h>
 
#include <agx/agx_vector_types.h>
 
#include <agx/PushDisableWarnings.h> // Disabling warnings. Include agx/PopDisableWarnings.h below!
#include <osg/Geometry>
#include <agx/PopDisableWarnings.h> // End of disabled warnings.
 
namespace agxCollide
{
  class Geometry;
}
 
namespace agxOSG
{
  class AGXOSG_EXPORT SplineShader : public osg::Geometry
  {
  public:
    SplineShader(size_t initialBufferSize = 256);
 
    void add(const agx::Vec3& startPoint, const agx::Vec3& endPoint, agx::Real radius, agx::Vec2 redShift = agx::Vec2(0, 0));
 
    void add(const agx::Vec3& point, const agx::Quat& zToDir, agx::Real radius, agx::Real redShift = agx::Real(0));
 
    void add2(const agx::Vec3& point, const agx::Quat& quat, agx::Real radius, agx::Real xTexCoord, agx::Real redShift);
 
    void add(const agxCollide::Geometry* geometry);
 
    void update();
 
    void resetCounters();
 
    osg::Program* getProgram() { return m_program; }
    const osg::Program* getProgram() const { return m_program; }
 
    osg::Uniform* getCircleResolutionUniform() { return m_circleResolutionUniform; }
    const osg::Uniform* getCircleResolutionUniform() const { return m_circleResolutionUniform; }
 
    osg::Uniform* getCylinderColorUniform() { return m_cylinderColorUniform; }
    const osg::Uniform* getCylinderColorUniform() const { return m_cylinderColorUniform; }
 
    osg::Uniform* getCircleNormalUniform() { return m_circleNormalUniform; }
    const osg::Uniform* getCircleNormalUniform() const { return m_circleNormalUniform; }
 
    osg::Vec3Array* getVertexArray() { return m_vertexArray; }
    osg::Vec4Array* getQuatsInColorArray() { return m_quatsInColorArray; }
    osg::FloatArray* getRadiusArray() { return m_radiusArray; }
    void setNumActiveElements(size_t numActiveElements) { m_numActiveElements = numActiveElements; }
 
    void setUseRedShiftScale(bool);
 
  protected:
    virtual ~SplineShader();
 
  protected:
    size_t              m_numActiveElements;
 
    osg::DrawArrays*    m_primitiveSet;
    osg::Vec3Array*     m_vertexArray;
    osg::FloatArray*    m_xTexCoordArray;
    osg::Vec4Array*     m_quatsInColorArray;
    osg::FloatArray*    m_radiusArray;
    osg::FloatArray*    m_redShiftArray;
    osg::Program*       m_program;
    osg::ref_ptr<osg::Uniform>       m_circleNormalUniform;
    osg::ref_ptr<osg::Uniform>       m_circleResolutionUniform;
    osg::ref_ptr<osg::Uniform>       m_cylinderColorUniform;
    osg::ref_ptr<osg::Uniform>       m_useRedShiftUniform;
  };
 
  typedef osg::ref_ptr< SplineShader > SplineShaderRef;
 
  class AGXOSG_EXPORT SplineRenderer : public agxSDK::StepEventListener
  {
    public:
      SplineRenderer( agxUtil::Spline* spline, osg::Group* root );
 
      virtual void update();
 
      virtual void update( const agx::RealVector& radiiVector );
 
      void setSplineModel( agxUtil::Spline* spline ) { m_spline = spline; }
 
      agxUtil::Spline* getSplineModel() { return m_spline; }
      const agxUtil::Spline* getSplineModel() const { return m_spline; }
 
      void setRadius( agx::Real radius ) { m_radius = radius; }
 
      agx::Real getRadius() const { return m_radius; }
 
      void setNumSegmentsPerUnitLength( agx::Real segmentsPerUnitLength ) { m_numSegmentsPerUnitLength = segmentsPerUnitLength; }
 
      agx::Real getNumSegmentsPerUnitLength() const { return m_numSegmentsPerUnitLength; }
 
      void setColor( const agx::Vec4f& color );
 
      agx::Vec4f getColor() const;
 
      virtual void removeNotification();
 
  protected:
    virtual ~SplineRenderer() {}
 
    virtual void addNotification();
 
    void initialize(osg::Group* root);
    virtual void last(const agx::TimeStamp&) { update(); }
 
    agx::RealVector& getRedShiftScales() { return m_redShiftScales; }
    const agx::RealVector& getRedShiftScales() const { return m_redShiftScales; }
 
  protected:
    osg::ref_ptr< osg::Group > m_node;
    agxUtil::SplineRef         m_spline;
    SplineShaderRef            m_splineGeometry;
 
    agx::RealVector            m_redShiftScales; 
    agx::Real                  m_radius;
    agx::Real                  m_numSegmentsPerUnitLength;
  };
 
  typedef agx::ref_ptr< SplineRenderer > SplineRendererRef;
}