35 lines
1.1 KiB
Go
35 lines
1.1 KiB
Go
package pixelgl
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// BeginEnder is an interface for manipulating OpenGL state.
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//
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// OpenGL is a state machine and as such, it is natural to manipulate it in a begin-end manner.
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// This interface is intended for all OpenGL objects, that can begin being active and end being active
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// such as windows, vertex arrays, vertex buffers, textures, shaders, pretty much everything.
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//
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// It might seem natural to use BeginEnders this way:
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//
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// window.Begin()
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// shader.Begin()
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// texture.Begin()
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// vertexarray.Begin()
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// vertexarray.Draw()
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// vertexarray.End()
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// texture.End()
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// shader.End()
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// window.End()
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//
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// Don't do this! A better practice is to make a BeginEnder so that it wraps another BeginEnder like this:
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//
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// shader = NewShader(window)
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// texture = NewTexture(shader)
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// vertexarray = NewVertexArray(texture)
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// // now, somewhere else in your code, instead of calling numerous Begin/Ends, you just calling
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// vertexarray.Draw()
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//
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// The final single call to draw a vertex array executes all of the Begins and Ends, because the objects are
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// wrapped around each other.
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type BeginEnder interface {
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Begin()
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End()
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}
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