History

version 0.47 (2005/09/02)

• ray angle delta computation upon ray-voxel-intersection is greatly improved
  -> massive speed boost
• use of cache-aware SSE instructions (prefetch and non-temporal writes)
  -> another speed bost
  -> note: now requires a processor with the extended MMX subset of SSE (Intel Pentium II or AMD Athlon)
• some other minor speed improvements

version 0.46 (2003/05/31)

• new: sampling anti-aliasing
  -> GREAT visual quality improvement (no more wobbling mountains) - in compromise for 40% loss of render speed
  
• improved overall quality of geometric calculations and fixed bugs therein
• fixed: height offset is now calculated correctly (was off between 0-1 before)
• fixed: line color interpolation did overflow sometimes

version 0.45 (2002/02/11)

• new: all drawings are now independent of the used resolution
• new: the view angle can now be changed just-in-time
• new: the interpolation (detail) mode can now be changed in runtime
• new: built an OOP API around the ASM code - that was more work than I had thought
• new: generic container file to store maps and information, plus saver and loader
• new: created the FIRST PUBLIC DEMO program of Terrender for Windows and DirectX

version 0.44 (2002/01/04)

• fixed: bugs with the new projection that occured when the scaling was changed
• fixed: small bug in the changed sky projection code from version 0.42

version 0.43 (2002/01/02)

• new: changed pinhole projection to perspective projection; this is in fact the more correct look, at least on a flat canvas like the screen ;-)

version 0.42 (2001/12/13)

• optimized the angle calculations in the raycast loop a lot
• fog shading more correct now
• pixels not seen are not calculated anymore
  -> drawing is now faster when tilting
• fixed: old color was used for interpolation when pixels where drawn in 2 subsequent turns of the raycast loop
• changed the sky projection code a little bit so it looks more volumetric now

version 0.41 (2001/12/09)

• new: completely rewrote the projection so it is now completely accurate when looking towards the horizon
  -> great visual improvement, but also loss of quite much speed
• fixed: scaling on the x-axis was wrong when tilting

version 0.40 (2001/02/27)

• fixed: scaling for different screen resolutions
• fixed: corrected strange implementation for x/y-direction of rays
• interpolation turned off for far away pixels
• only memory access in main raycast loop now is to the data map

version 0.40 (2001/02/01)

• new: ported sky routine to assembler
• fixed: I forgot that stupid EMMS instruction at the end of vx_SetHaze
• new: pixels not seen are not drawn anymore

version 0.36 (2000/09/15)

• fixed: wrong scaling for different resolutions in both landscape and sky
• ported sky routine partly to assembler
• height interpolation is now done with MMX

version 0.35 (2000/09/12)

• fixed: newly introduced bug with cos_neig_cos_steig2 at height-int.
• fixed: newly introduced bug with entf at @h2_fits

version 0.32 (2000/06/11)

• fixed: little bug in Perlin cloud generation function when cycles > 5
• ported Perlin function to assembler
• new: created a rather modular design
• new: introduced scaling factor for different resolutions

version 0.31 (2000/06/01)

• fixed: bug in rotation
• no need for a bigger buffer because of over-drawn pixels anymore
• fixed: overdraw at the screen border when interpolation used
• fixed: stupid bug in RGBhi macro
• new: color and form of clouds can now be changed

version 0.26 (2000/04/22)

• fixed: corrected scaling when tilting
• some variables are now precalculated
• new: engine capable of tilting between -45° and 45°

...many versions and bug fixes...

version 0.14 (1999/12/05)

• new: moving and morphing clouds on the sky

...many versions and bug fixes...

version 0.1 (1999/09/22)

• initial C version ported from Turbo Pascal to DJGPP

Copyright 2003-2005, Michael Noisternig