1GL_NV_conditional_render 2http://www.opengl.org/registry/specs/NV/conditional_render.txt 3GL_NV_conditional_render 4 GL_QUERY_WAIT_NV 0x8E13 5 GL_QUERY_NO_WAIT_NV 0x8E14 6 GL_QUERY_BY_REGION_WAIT_NV 0x8E15 7 GL_QUERY_BY_REGION_NO_WAIT_NV 0x8E16 8 void glBeginConditionalRenderNV (GLuint id, GLenum mode) 9 void glEndConditionalRenderNV (void) 10