Argh. I was still running 4.1 by mistake. It's right there in plain sight in 4.2.1.<br><br>Another question about the world/universe approach: how do you guys think about randomness? I've found that adding a bit of randomness can make games considerably more compelling. But it's not clear how to include randomness in a reasonably simple way that doesn't compromise on the purely-functional nature of the callbacks...<br>
<br>y<br><br><div class="gmail_quote">On Sat, Sep 26, 2009 at 9:49 AM, Matthias Felleisen <span dir="ltr"><<a href="mailto:matthias@ccs.neu.edu">matthias@ccs.neu.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div style="word-wrap: break-word;"><br><div><div class="im"><div>On Sep 26, 2009, at 9:43 AM, Yaron Minsky wrote:</div><br><blockquote type="cite">Nice to see everyone up so early on a Saturday morning!<br></blockquote><div>
<br></div></div><div>You're late :-]</div><div class="im"><div><br></div><br><blockquote type="cite">Where is 2htdp/universe? I just installed the latest PLT scheme release, and I don't see anything called "universe" in the list of teachpacks that comes up when I try to add a teachpack.<br>
</blockquote><div><br></div><div><br></div></div><div>Use the scrollbar. It's there. </div><div class="im"><div><br></div><div><br></div><div><br></div><br><blockquote type="cite">Anyway, I'm glad to see this getting worked on. I think one of the things that Scratch got right is that it provides simple image transformations, which turn out to be very useful in constructing simple-yet-compelling games. I think having more of this stuff for drscheme will make it considerably more compelling for the younguns.<br>
<br>y<br><br><div class="gmail_quote">On Sat, Sep 26, 2009 at 9:29 AM, Matthias Felleisen <span dir="ltr"><<a href="mailto:matthias@ccs.neu.edu" target="_blank">matthias@ccs.neu.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<br> <br> 1. htdp/world is deprecated, use 2htdp/universe instead.<br> <br> 2. we consider the pinhole approach to our image library as a mistake. To solve the problem Robby is working on 2htdp/image, a replacement for the image library. When it comes out (end of semester probably) it will support rotate and other such operations, plus comparisons will be much faster.<br>
<font color="#888888"> <br> -- Matthias</font><div><br> <br> <br> <br> <br> <br> On Sep 26, 2009, at 9:17 AM, Yaron Minsky wrote:<br> <br> </div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div> I'm playing around with the image.ss and world.ss teachpacks, and I couldn't figure out how to scale and rotate images. Are there such image transformation functions in some other teachpack?<br> <br> y<br></div>
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