81 lines
2.2 KiB
Markdown
81 lines
2.2 KiB
Markdown
# Chapter 18: Rendering with Rays
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As I read this book, I summarize what I think is wrong. If you think my comments are wrong then please let me know. We can dicuss more and update your opinion.
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## Signed distance functions
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There is a runtime error in because Shaders.metal files isn't included in the bundle. But we have the default library.
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In Renderer.swift, in initializeMetal(), replace this:
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```
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guard let path = Bundle.main.path(forResource: "Shaders", ofType: "metal") else { fatalError() }
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let input = try String(contentsOfFile: path, encoding: String.Encoding.utf8)
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let library = try device.makeLibrary(source: input, options: nil)
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```
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With:
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```
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let library = device.makeDefaultLibrary()!
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```
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## The raymarching algorithm
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There is a runtime error in because Shaders.metal files isn't included in the bundle. But we have the default library.
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In Renderer.swift, in initializeMetal(), replace this:
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```
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guard let path = Bundle.main.path(forResource: "Shaders", ofType: "metal") else { fatalError() }
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let input = try String(contentsOfFile: path, encoding: String.Encoding.utf8)
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let library = try device.makeLibrary(source: input, options: nil)
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```
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With:
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```
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let library = device.makeDefaultLibrary()!
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```
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## Creating random noise
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There is a runtime error in because Shaders.metal files isn't included in the bundle. But we have the default library.
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In Renderer.swift, in initializeMetal(), remove this:
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```
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let path = Bundle.main.path(forResource: "Shaders", ofType: "metal")
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```
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Replace this:
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```
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let input = try String(contentsOfFile: path!, encoding: String.Encoding.utf8)
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let library = try device!.makeLibrary(source: input, options: nil)
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```
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With:
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```
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let library = device.makeDefaultLibrary()!
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```
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## Marching clouds
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There is a runtime error in because Shaders.metal files isn't included in the bundle. But we have the default library.
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In Renderer.swift, in initializeMetal(), replace this:
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```
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guard let path = Bundle.main.path(forResource: "Shaders", ofType: "metal") else { fatalError() }
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let input = try String(contentsOfFile: path, encoding: String.Encoding.utf8)
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let library = try device.makeLibrary(source: input, options: nil)
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```
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With:
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```
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let library = device.makeDefaultLibrary()!
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```
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