On Mon, 2008-06-16 at 12:48 +0100, Marcus Strehlow wrote:
Hi all,
I thought I'd also give you my thoughts on this. While in theory a replication of Apple's (actually SteelSkies') Cover Flow effect is possible to achieve in almost any development environment, with Squeak there are a couple of things to consider.
2-Dimensional movement is possible and it would also be processed faster, as there is no hardware-accelerated computation and rendering is involved.
Wouldn't lack of hardware acceleration make it slower?
Although not the real Cover Flow, a .Mac-like caroussel (I hope I spelled that right) effect is achievable, and depending on the items that should be in the effect it would run more or less fast. As Squeak provides mechanisms for animating Morphs, this could be a possibility.
However, when it comes to 3-dimensional movement, it is a bit tricky on this one. The original Cover Flow by SteelSkies used OpenGL obviously for the effect. When Apple took it over, they ported the code into Quartz, and later Core Animation, which are obviously not available to other platforms itself the Mac OS X itself. So that said, OpenGL would be required for this effect. There is one implementation of OpenGL available for Squeak, which regrettably only runs under the Windows platform as it accesses DirectX if I remember that correctly.
My understanding is that Croquet, which is based on squeak, uses OpenGL and does so on all platforms.
Ross
On 16.06.2008, at 20:25, Ross Boylan wrote:
On Mon, 2008-06-16 at 12:48 +0100, Marcus Strehlow wrote:
Hi all,
I thought I'd also give you my thoughts on this. While in theory a replication of Apple's (actually SteelSkies') Cover Flow effect is possible to achieve in almost any development environment, with Squeak there are a couple of things to consider.
2-Dimensional movement is possible and it would also be processed faster, as there is no hardware-accelerated computation and rendering is involved.
Wouldn't lack of hardware acceleration make it slower?
Although not the real Cover Flow, a .Mac-like caroussel (I hope I spelled that right) effect is achievable, and depending on the items that should be in the effect it would run more or less fast. As Squeak provides mechanisms for animating Morphs, this could be a possibility.
However, when it comes to 3-dimensional movement, it is a bit tricky on this one. The original Cover Flow by SteelSkies used OpenGL obviously for the effect. When Apple took it over, they ported the code into Quartz, and later Core Animation, which are obviously not available to other platforms itself the Mac OS X itself. So that said, OpenGL would be required for this effect. There is one implementation of OpenGL available for Squeak, which regrettably only runs under the Windows platform as it accesses DirectX if I remember that correctly.
This sentence makes no sense. OpenGL is not DirectX.
My understanding is that Croquet, which is based on squeak, uses OpenGL and does so on all platforms.
Correct. Croquet can only use OpenGL. Balloon3D can use both OpenGL and Direct3D, which might be advantageous on Windows.
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beginners@lists.squeakfoundation.org
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Bert Freudenberg -
Ross Boylan