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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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2
include/osg/Point
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@@ -94,6 +94,7 @@ class OSG_EXPORT Point : public StateAttribute
void setPointParametersSupported(bool flag) { _isPointParametersSupported=flag; }
bool isPointParametersSupported() const { return _isPointParametersSupported; }
void glPointParameteri(GLenum pname, GLint param) const;
void glPointParameterf(GLenum pname, GLfloat param) const;
void glPointParameterfv(GLenum pname, const GLfloat *params) const;
@@ -103,6 +104,7 @@ class OSG_EXPORT Point : public StateAttribute
bool _isPointParametersSupported;
void* _glPointParameteri;
void* _glPointParameterf;
void* _glPointParameterfv;

22
include/osg/PointSprite
View File

@@ -20,6 +20,9 @@
#ifndef GL_ARB_point_sprite
#define GL_POINT_SPRITE_ARB 0x8861
#define GL_COORD_REPLACE_ARB 0x8862
#define GL_POINT_SPRITE_COORD_ORIGIN 0x8CA0
#define GL_LOWER_LEFT 0x8CA1
#define GL_UPPER_LEFT 0x8CA2
#endif
namespace osg {
@@ -28,11 +31,12 @@ namespace osg {
class OSG_EXPORT PointSprite : public osg::StateAttribute {
public:
PointSprite() {}
PointSprite();
/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
PointSprite(const PointSprite& texenv,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY):
StateAttribute(texenv,copyop) {}
PointSprite(const PointSprite& ps,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY):
StateAttribute(ps,copyop),
_coordOriginMode(ps._coordOriginMode) {}
META_StateAttribute(osg, PointSprite, POINTSPRITE);
@@ -53,9 +57,19 @@ public:
virtual void apply(osg::State& state) const;
static bool isPointSpriteSupported(unsigned int context);
enum CoordOriginMode {
UPPER_LEFT = GL_UPPER_LEFT,
LOWER_LEFT = GL_LOWER_LEFT
};
inline void setCoordOriginMode(CoordOriginMode mode) { _coordOriginMode = mode; }
inline CoordOriginMode getCoordOriginMode() const { return _coordOriginMode; }
protected:
virtual ~PointSprite( void ) {}
virtual ~PointSprite();
CoordOriginMode _coordOriginMode;
};
}