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What should I do if I have multiple shaders?
If you have multiple shaders, could you instead of switching between shaders all the time just have one shader with a switch and each case will send you along to another shader function which you require for that specific object? ( And you would send an enumerated value through your constant buffer for that specific object)
When to use pixel shader in rasterizer stage?
The rasterizer stage invokes a pixel shader once for each pixel covered by a primitive, however, it is possible to specify a NULL shader to avoid running a shader. When multisampling a texture, a pixel shader is invoked once per-covered pixel while a depth/stencil test occurs for each covered multisample.
Why do we need a GLSL structure for shaders?
GLSL allows us to bind these kinds of values together into a structure. The structure doesn’t provide many benefits other than keeping the namespaces of your code clean and allowing for declaring multiple uniforms of the same type, such as a “front” and “back” material.
How is a for loop used in a shader?
The for loop will be familiar to those who have used C looping: We iterate over each light in our array of lights accumulating the results into the fragColor variable we’ve defined. The global component is used to initialize the variable, with the contribution of each light added to the result.
How do you change shaders between draw calls?
The simple answer is you change them between each draw call. Set a shader, draw a teapot, set another shader, draw another teapot. For more complex stuff where you need to apply multiple shaders to just one object such as blur, glow and so on.
How do you use multiple shaders in GLSL?
The simple answer is you change them between each draw call. Set a shader, draw a teapot, set another shader, draw another teapot. For more complex stuff where you need to apply multiple shaders to just one object such as blur, glow and so on. You basically have everything rendered to texture(s).
Is it better to batch up objects or use Uber shader?
If your switch statements are simple enough you might find that it is indeed quicker to use them. It is often better anyway to batch up object with identical material properties (same shaders, textures, material constant buffers, etc.) just to avoid changing active resources even when using an uber shader.