Hi Robert,
About GL_PATCH_DEFAULT_INNER_LEVEL and GL_PATCH_DEFAULT_OUTER_LEVEL : I also
think that a dedicated StateAttribute is the best way to implement this and let
users do what they want with it.
Maybe a default value ("1.0" is probably the best one) should be set at top of
the scene graph (just like some other StateAttribute) ?
About the enum problem : I understand that a direct mapping between OSG and
OpenGL enums is very convenient. But perhaps we can use here some kind of
"magic value" :
{
POINTS = GL_POINTS
LINES = GL_LINES
LINE_STRIP = GL_LINE_STRIP
LINE_LOOP = GL_LINE_LOOP
TRIANGLES = GL_TRIANGLES
TRIANGLE_STRIP = GL_TRIANGLE_STRIP
TRIANGLE_FAN = GL_TRIANGLE_FAN
QUADS = GL_QUADS
QUAD_STRIP = GL_QUAD_STRIP
POLYGON = GL_POLYGON
LINES_ADJACENCY = GL_LINES_ADJACENCY
LINE_STRIP_ADJACENCY = GL_LINE_STRIP_ADJACENCY
TRIANGLES_ADJACENCY = GL_TRIANGLES_ADJACENCY
TRIANGLE_STRIP_ADJACENCY = GL_TRIANGLE_STRIP_ADJACENCY
PATCHES_0 = SOME_KIND_OF_MAGIC_VALUE
PATCHES_1 = PATCHES_0 + 1
PATCHES_2 = PATCHES_0 + 2
PATCHES_3 = PATCHES_0 + 3
...
PATCHES_N = PATCHES_0 + N
};
So in the code, the test could be like :
Code:
if (mode >= PATCHES_0)
{
use "GL_PATCH" draw mode
set "GL_PATCH_SIZE" = (mode-PATCHES_0)
}
else
{
use "mode" draw mode
}
Thank you!
Cheers,
Aurelien
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=54527#54527
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