r = gl.RenderMode(mode)
gl.RenderMode()
sets the rasterization mode. It takes one argument, mode
, which can assume one of three predefined values:
#GL_RENDER
#GL_SELECT
#GL_RENDER
is returned in a select buffer, which must
be created (See gl.SelectBuffer for details.) before selection mode is entered.
#GL_FEEDBACK
#GL_RENDER
is returned in a feedback buffer,
which must be created (See gl.FeedbackBuffer for details.) before feedback mode is entered.
The return value of gl.RenderMode()
is determined by the render mode at the time gl.RenderMode()
is called, rather than by mode
.
The values returned for the three render modes are as follows:
#GL_RENDER
#GL_SELECT
#GL_FEEDBACK
See gl.SelectBuffer for more details concerning selection operation.
See gl.FeedbackBuffer for more details concerning feedback operation.
If an error is generated, gl.RenderMode()
returns 0 regardless of the current render mode.
Please consult an OpenGL reference manual for more information.
#GL_RENDER
(see above)#GL_INVALID_ENUM
is generated if mode
is not one of the three accepted values.
#GL_INVALID_OPERATION
is generated if gl.SelectBuffer() is called while the render mode is #GL_SELECT
, or if gl.RenderMode()
is called with argument #GL_SELECT
before gl.SelectBuffer() is called at least once.
#GL_INVALID_OPERATION
is generated if gl.FeedbackBuffer() is called while the render mode is #GL_FEEDBACK
, or if gl.RenderMode()
is called with argument #GL_FEEDBACK
before gl.FeedbackBuffer() is called at least once.
#GL_INVALID_OPERATION
is generated if gl.RenderMode()
is executed between the execution of gl.Begin() and the corresponding execution of gl.End().
#GL_RENDER_MODE