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90 lines
2.9 KiB
C++
90 lines
2.9 KiB
C++
//##################################################################################################
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//
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// Custom Visualization Core library
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// Copyright (C) 2011-2012 Ceetron AS
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//
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// This library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful, but WITHOUT ANY
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// FITNESS FOR A PARTICULAR PURPOSE.
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//
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// See the GNU General Public License at <<http://www.gnu.org/licenses/gpl.html>>
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// for more details.
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//
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//##################################################################################################
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#include "cvfBase.h"
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#include "cvfRenderStateFrontFace.h"
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#include "cvfAssert.h"
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#include "cvfOpenGL.h"
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namespace cvf {
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//==================================================================================================
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///
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/// \class cvf::RenderStateFrontFace
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/// \ingroup Render
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///
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/// Encapsulate OpenGL glFrontFace() used to specify polygon winding. Used together with RenderStateCullFace
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/// render state and the gl_FrontFacing bultin shader input variable.
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///
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/// \sa http://www.opengl.org/sdk/docs/man/xhtml/glFrontFace.xml
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/// \sa http://www.opengl.org/sdk/docs/manglsl/xhtml/gl_FrontFacing.xml
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//==================================================================================================
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//--------------------------------------------------------------------------------------------------
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///
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//--------------------------------------------------------------------------------------------------
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RenderStateFrontFace::RenderStateFrontFace(Mode faceMode)
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: RenderState(FRONT_FACE),
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m_faceMode(faceMode)
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{
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}
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//--------------------------------------------------------------------------------------------------
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///
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//--------------------------------------------------------------------------------------------------
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void RenderStateFrontFace::setMode(Mode faceMode)
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{
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m_faceMode = faceMode;
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}
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//--------------------------------------------------------------------------------------------------
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///
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//--------------------------------------------------------------------------------------------------
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RenderStateFrontFace::Mode RenderStateFrontFace::mode() const
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{
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return m_faceMode;
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}
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//--------------------------------------------------------------------------------------------------
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///
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//--------------------------------------------------------------------------------------------------
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void RenderStateFrontFace::applyOpenGL(OpenGLContext* oglContext) const
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{
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if (m_faceMode == CW)
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{
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glFrontFace(GL_CW);
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}
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else
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{
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glFrontFace(GL_CCW);
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}
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CVF_CHECK_OGL(oglContext);
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}
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} // namespace cvf
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