Revision History

Minor user interface improvements.

Set tiling radius and drawing radius according to the SpaceType, to allow deeper tilings in flat spaces than in hyperbolic ones.

Added spaceship to mark user's position and orientation in the manifold.

(Win) Simplified loading of Open GL entry points.

(Mac) Added workaround for Mac OS 10.6 OpenGL performance issue when fog is enabled. [This issue disappared when Curved Spaces moved to programmable shaders (OpenGL 2.0), and the workaround has been removed.]

(Mac) Migrated NSString literals with UTF-8 to newer, simpler format.

Rewrote menu translation code for Mac OS 10.6 compatibility.

Moved responsibility for requesting a display redraw from platform-dependent code to platform-independent code.

Minor changes for OpenGL ES compatibility.

Minor maintenance on Win32 user interface

Reorganized drawing code to use Vertex Buffer Objects instead of display lists, because displays lists are deprecated in standard OpenGL and don't exist at all in OpenGL ES. New drawing code almost doubles the frame rate for large hyperbolic tilings (e.g. from 96fps to 186fps for the default scene) on current hardware. Note to self: glMultiDrawArrays() turned out to be a performance disaster.

Replaced OpenGL quads with generic OpenGL meshes.

Added data persistence ("user prefs" on Mac, "registry keys" on Windows) so KaleidoTile now remembers the multisampling ("Smooth Edges") setting from a previous session.

Simplified default language initialization on Mac OS X, eliminating LanguageCode.strings files.

Vertex shader avoids negative fog coordinate, which the MacBook OpenGL implementation would take the absolute value of.

Trivial tidying of code.

Cosmetic improvements to user interface.

Avoids calling ErrorMessage() when the OpenGL context is active.

Provides a clear explanation if the application gets separated from its supporting files.

Re-organized internationalization paradigm so that

• for each language, a single platform-independent file contains all localized strings and
• the Windows version no longer needs separate .rc and .dll files for each language
• (the Mac OS X version was already relieved of its language-specific NIB files at the previous revision).

Suspends continuous redraw when display is static.

Re-organized internationalization paradigm on Mac OS X, to avoid maintaining multiple copies of the NIB file.

Added Japanese, thanks to Tatsu Takeuchi.

(Win) Added Copy Image and Save Image… that work correctly with multisampling.

Minor menu reorganization.

Added technical FAQs to website.

(Mac) Modified image copying code to accommodate Mac OS 10.3.9.

(Win) Revised error messages to refer to technical FAQ.

French added, thanks to Roland Lehoucq.

For consistency with the Torus Games, double-click as well as single-click works to exit navigational mode.

Documentation upgraded to HTML 4.0.1.

Discontinued Win95 version.

Fixed bug: Avoids calling glDisable() for unsupported features. Thanks to Paul Chavez for helping track this down.

MacOS X version added.

Extensive internal re-organization to isolate platform-independent code from UI.

Help Book written.

Spinning Earth (as in Curved Spaces 1) added, with level-of-detail rendering.

Texturing respects aspect ratio to avoid "texture creep".

Faster tiling algorithm: replaced O(n²) algorithm with O(n log n) algorithm.

Faster rendering algorithm: 2-3 times faster.

Smoother rendering algorithm: cells added and removed on a frame-by-frame basis.

More flexible fog algorithm: automatically adapts to depth of tiling.

Uses programmable vertex shader to move fog computation from CPU to GPU.

Walls of fundamental cell may be fully closed, fully open or anywhere in between.

Vertex figures displayed upon demand.

Clifford parallels displayed upon demand (in spherical spaces).

Original Curved Spaces 1.0 release.