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並前往https://coderedirect.com/questions/253686/how-to-use-alpha-transparency-in-opengl

How to use alpha transparency in OpenGL? - Code Redirect

... glPointSize(8); glBegin(GL_POINTS); glColor4f(.23,.78,.32,1.0); glVertex2f(0,0); glColor4f(.23,.78,.32,0.1); glVertex2f(0.1,0); glEnd(); glFlush(); }.

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