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From Farshid Lashkari, "This patch adds a CoordOriginMode to the osg::PointSprite attribute.

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The mode needs to be changed to LOWER_LEFT when rendering point
sprites to pbuffers or FBOs, otherwise the points will be transformed
on the CPU."
This commit is contained in:
Robert Osfield
2006-11-14 12:29:54 +00:00
parent 5f59741b42
commit 7cb1bcbd7d
4 changed files with 55 additions and 10 deletions
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18
src/osg/Point.cpp
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@@ -116,6 +116,7 @@ Point::Extensions::Extensions(const Extensions& rhs):
void Point::Extensions::lowestCommonDenominator(const Extensions& rhs)
{
if (!rhs._isPointParametersSupported) _isPointParametersSupported = false;
if (!rhs._glPointParameteri) _glPointParameteri = 0;
if (!rhs._glPointParameterf) _glPointParameterf = 0;
if (!rhs._glPointParameterfv) _glPointParameterfv = 0;
}
@@ -126,7 +127,10 @@ void Point::Extensions::setupGLExtenions(unsigned int contextID)
isGLExtensionSupported(contextID,"GL_ARB_point_parameters") ||
isGLExtensionSupported(contextID,"GL_EXT_point_parameters") ||
isGLExtensionSupported(contextID,"GL_SGIS_point_parameters");
_glPointParameteri = getGLExtensionFuncPtr("glPointParameteri", "glPointParameteriARB");
if (!_glPointParameteri) _glPointParameteri = getGLExtensionFuncPtr("glPointParameteriEXT", "glPointParameteriSGIS");
_glPointParameterf = getGLExtensionFuncPtr("glPointParameterf", "glPointParameterfARB");
if (!_glPointParameterf) _glPointParameterf = getGLExtensionFuncPtr("glPointParameterfEXT", "glPointParameterfSGIS");
@@ -134,6 +138,18 @@ void Point::Extensions::setupGLExtenions(unsigned int contextID)
if (!_glPointParameterfv) _glPointParameterfv = getGLExtensionFuncPtr("glPointParameterfvEXT", "glPointParameterfvSGIS");
}
void Point::Extensions::glPointParameteri(GLenum pname, GLint param) const
{
if (_glPointParameteri)
{
typedef void (APIENTRY * GLPointParameteriProc) (GLenum pname, GLint param);
((GLPointParameteriProc)_glPointParameteri)(pname, param);
}
else
{
notify(WARN)<<"Error: glPointParameteri not supported by OpenGL driver"<<std::endl;
}
}
void Point::Extensions::glPointParameterf(GLenum pname, GLfloat param) const
{