<div dir="ltr">On Fri, Nov 3, 2017 at 1:26 PM, nick ralabate via swift-evolution <span dir="ltr"><<a href="mailto:swift-evolution@swift.org" target="_blank">swift-evolution@swift.org</a>></span> wrote:<br><div class="gmail_extra"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">I think it would be helpful for graphics programmers to specify vertex data inline without surrounding every value with Float(4.0).</div></blockquote><div><br></div><div>Two pointers:</div><div><br></div>a. You never actually want to write `Float(4.0)`, which casts a `FloatLiteralType aka Double` with value `4.0` to `Float`. You want `4 as Float`. This is an issue which has come up several times before on this list. <div><br></div><div>b. You don't need to do this for every value in an array. You only need to annotate one; probably the first one for your readers' sanity:</div><div><br></div><div>```</div><div>let vertexData = [1 as Float, 0, 0.5, 1]<br></div><div>```<br></div><div><br></div><div>Alternatively, you can use explicit type annotations as shown by others.</div><div><br></div><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div>Something like this:</div><div><br></div><div>let vertexData = [ 1.0f, 0.0f, 0.5f, 1.0f ]</div><div><br></div><div>Also, it would be great if Swift had a type for half-floats to match the iPhone GPU:</div><div><br></div><div>let vertexData = [ 1.0h, 0.0h, 0.5h, 1.0h]</div><div><br></div><div><br></div><div>Thanks!</div></div>
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