when using Opengl to draw scene graph, I saw there is always a glClear(GL_DEPTH_BUFFER_BIT), what’s the purpose for this?
when using Opengl to draw scene graph, I saw there is always a glClear(GL_DEPTH_BUFFER_BIT),
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when using Opengl to draw scene graph, I saw there is always a glClear(GL_DEPTH_BUFFER_BIT), what’s the purpose for this?
It clears the depth buffer. The depth buffer is the part of the frame buffer, that makes primitives being occluded by other primitives in front of them. Without clearing the depth buffer, you’d draw into the depth structure of the previous drawing.