ab580f1e3b
where the header file declared a parameter non-const, but the function definition expected a const. The Solaris linker was coming up with undefined symbols.
108 lines
3.1 KiB
C++
108 lines
3.1 KiB
C++
// Ideas and code borrowed from GLUT pointburst demo
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// written by Mark J. Kilgard
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#include <osg/GLExtensions>
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#include <osg/GL>
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#include <osg/Point>
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#include <osg/Notify>
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using namespace osg;
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// if extensions not defined by gl.h (or via glext.h) define them
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// ourselves and allow the extensions to detectd at runtine using
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// osg::isGLExtensionSupported().
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#if defined(GL_SGIS_point_parameters) && !defined(GL_EXT_point_parameters)
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/* Use the EXT point parameters interface for the SGIS implementation. */
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# define GL_POINT_SIZE_MIN_EXT GL_POINT_SIZE_MIN_SGIS
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# define GL_POINT_SIZE_MAX_EXT GL_POINT_SIZE_MAX_SGIS
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# define GL_POINT_FADE_THRESHOLD_SIZE_EXT GL_POINT_FADE_THRESHOLD_SIZE_SGIS
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# define GL_DISTANCE_ATTENUATION_EXT GL_DISTANCE_ATTENUATION_SGIS
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# define GL_EXT_point_parameters 1
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#endif
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#if !defined(GL_EXT_point_parameters)
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# define GL_POINT_SIZE_MIN_EXT 0x8126
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# define GL_POINT_SIZE_MAX_EXT 0x8127
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# define GL_POINT_FADE_THRESHOLD_SIZE_EXT 0x8128
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# define GL_DISTANCE_ATTENUATION_EXT 0x8129
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# define GL_EXT_point_parameters 1
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#endif
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#ifndef PFNGLPOINTPARAMETERFEXTPROC
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typedef void (APIENTRY * PFNGLPOINTPARAMETERFEXTPROC) (GLenum pname, GLfloat param);
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#endif
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#ifndef PFNGLPOINTPARAMETERFVEXTPROC
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typedef void (APIENTRY * PFNGLPOINTPARAMETERFVEXTPROC) (GLenum pname, const GLfloat *params);
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#endif
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PFNGLPOINTPARAMETERFEXTPROC s_PointParameterfEXT = NULL;
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PFNGLPOINTPARAMETERFVEXTPROC s_PointParameterfvEXT = NULL;
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Point::Point()
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{
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_size = 1.0f; // TODO find proper default
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_fadeThresholdSize = 1.0f; // TODO find proper default
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// TODO find proper default
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_distanceAttenuation = Vec3(0.0f, 1.0f/5.f, 0.0f);
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}
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Point::~Point()
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{
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}
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void Point::init_GL_EXT()
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{
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if (isGLExtensionSupported("GL_EXT_point_parameters"))
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{
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s_PointParameterfEXT = (PFNGLPOINTPARAMETERFEXTPROC)
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getGLExtensionFuncPtr("glPointParameterfEXT");
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s_PointParameterfvEXT = (PFNGLPOINTPARAMETERFVEXTPROC)
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getGLExtensionFuncPtr("glPointParameterfvEXT");
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}
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else if (isGLExtensionSupported("GL_SGIS_point_parameters"))
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{
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s_PointParameterfEXT = (PFNGLPOINTPARAMETERFEXTPROC)
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getGLExtensionFuncPtr("glPointParameterfSGIS");
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s_PointParameterfvEXT = (PFNGLPOINTPARAMETERFVEXTPROC)
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getGLExtensionFuncPtr("glPointParameterfvSGIS");
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}
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}
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void Point::setSize( float size )
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{
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_size = size;
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}
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void Point::setFadeThresholdSize(const float fadeThresholdSize)
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{
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_fadeThresholdSize = fadeThresholdSize;
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}
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void Point::setDistanceAttenuation(const Vec3& distanceAttenuation)
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{
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_distanceAttenuation = distanceAttenuation;
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}
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void Point::apply(State&) const
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{
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glPointSize(_size);
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static bool s_gl_ext_init=false;
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if (!s_gl_ext_init)
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{
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s_gl_ext_init = true;
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init_GL_EXT();
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}
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if (s_PointParameterfvEXT) s_PointParameterfvEXT(GL_DISTANCE_ATTENUATION_EXT, (const GLfloat*)&_distanceAttenuation);
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if (s_PointParameterfEXT) s_PointParameterfEXT(GL_POINT_FADE_THRESHOLD_SIZE_EXT, _fadeThresholdSize);
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}
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