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Expanding our BasicModel Class

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ericrrichards22

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I had promised that we would move on to discussing shadows, using the shadow mapping technique. However, when I got back into the code I had written for that example, I realized that I was really sick of handling all of the geometry for our stock columns & skull scene. So I decided that, rather than manage all of the buffer creation and litter the example app with all of the buffer counts, offsets, materials and world transforms necessary to create our primitive meshes, I would take some time and extend the BasicModel class with some factory methods to create geometric models for us, and leverage the BasicModel class to encapsulate and manage all of that data. This cleans up the example code considerably, so that next time when we do look at shadow mapping, there will be a lot less noise to deal with.

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The heavy lifting for these methods is already done; our GeometryGenerator class already does the work of generating the vertex and index data for these geometric meshes. All that we have left to do is massage that geometry into our BasicModel's MeshGeometry structure, add a default material and textures, and create a Subset for the entire mesh. As the material and textures are public, we can safely initialize the model with a default material and null textures, since we can apply a different material or apply diffuse or normal maps to the model after it is created.

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The full source for this example can be downloaded from my GitHub repository, at https://github.com/ericrrichards/dx11.git, under the ShapeModels project.

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