Tao OpenGL C# Tab Not Rotate -
why opengl not rotating when placed @ tab bar?
private void simpleopenglcontrol1_paint_1(object sender, painteventargs e) { gl.glclear(gl.gl_color_buffer_bit | gl.gl_depth_buffer_bit); gl.glmatrixmode(gl.gl_modelview); gl.glloadidentity(); gl.gltranslated(0, 0, -5); gl.glrotated(yrot += 1, 1, 1, 0); gl.glpointsize(3); gl.glpolygonmode(gl.gl_front, gl.gl_lines); gl.glpolygonmode(gl.gl_back, gl.gl_lines); gl.glbegin(gl.gl_quads); { ////vista posterior gl.glcolor3ub(255, 0, 255); gl.glvertex3d(0, 1, -1); gl.glvertex3d(1, -1, -1); gl.glvertex3d(-1, -1, -1); gl.glvertex3d(0, 1, -1); ////debajo gl.glcolor3ub(0, 255, 255); gl.glvertex3d(-1, -1, -1); gl.glvertex3d(1, -1, -1); gl.glvertex3d(1, -1, 1); gl.glvertex3d(-1, -1, 1); ////por la izquierda gl.glcolor3ub(255, 255, 0); gl.glvertex3d(0, 1, -1); gl.glvertex3d(-1, -1, -1); gl.glvertex3d(-1, -1, 1); gl.glvertex3d(0, 1, 1); ////por la derecha gl.glcolor3ub(0, 0, 255); gl.glvertex3d(0, 1, 1); gl.glvertex3d(1, -1, 1); gl.glvertex3d(1, -1, -1); gl.glvertex3d(0, 1, -1); gl.glcolor3ub(255, 0, 0); gl.glvertex3d(0, 1, 1); gl.glvertex3d(-1, -1, 1); gl.glvertex3d(1, -1, 1); gl.glvertex3d(0, 1, 1); gl.glend(); } i put on tab, when click tab , opengl tab 3d object changes not rotate.
unless use timer force repaint n times per second, paint event occurs when needed.
when switch between tabs, redraw needed , paint event occurs. why see little change @ time.
you possibly see same thing reducing/maximizing window, etc...
you should:
- use timer periodically call invalidate or equivalent function.
- don't update
yrotonpaintevent. because didn't know when it's called have no control on rotation speed. use timer, or time-based interpolation of value.
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