/home/master/UCL/VisualizationLibrary/src/vlGraphics/PatchParameter.hpp

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/*  Visualization Library                                                             */
/*  http://visualizationlibrary.org                                                   */
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#ifndef PatchParameter_INCLUDE_ONCE
#define PatchParameter_INCLUDE_ONCE

#include <vlCore/Object.hpp>

namespace vl 
{
  //------------------------------------------------------------------------------
  // PatchParameter
  //------------------------------------------------------------------------------
  class PatchParameter: public Object
  {
    VL_INSTRUMENT_CLASS(vl::PatchParameter, Object)

  public:
    PatchParameter(): mPatchVertices(0), mPatchDefaultOuterLevel(fvec4(4,4,4,4)), mPatchDefaultInnerLevel(fvec2(4,4)) 
    {
      VL_DEBUG_SET_OBJECT_NAME()
    }

    void apply() const
    {
      VL_CHECK(Has_GL_ARB_tessellation_shader||Has_GL_Version_4_0);
      if (Has_GL_ARB_tessellation_shader||Has_GL_Version_4_0)
      {
        glPatchParameteri(GL_PATCH_VERTICES, mPatchVertices); VL_CHECK_OGL();
        glPatchParameterfv(GL_PATCH_DEFAULT_OUTER_LEVEL, mPatchDefaultOuterLevel.ptr()); VL_CHECK_OGL();
        glPatchParameterfv(GL_PATCH_DEFAULT_INNER_LEVEL, mPatchDefaultInnerLevel.ptr()); VL_CHECK_OGL();
      }
    }

    void setPatchVertices(int vertices) { mPatchVertices = vertices; }

    int patchVertices() const { return mPatchVertices; }

    void setPatchDefaultOuterLevel(const fvec4& level) { mPatchDefaultOuterLevel = level; }
    
    const fvec4& patchDefaultOuterLevel() const { return mPatchDefaultOuterLevel; }

    void setPatchDefaultInnerLevel(const fvec2& level) { mPatchDefaultInnerLevel = level; }
    
    const fvec2& patchDefaultInnerLevel() const { return mPatchDefaultInnerLevel; }

  protected:
    int mPatchVertices;
    fvec4 mPatchDefaultOuterLevel;
    fvec2 mPatchDefaultInnerLevel;
  };
}

#endif