Skip to content
Snippets Groups Projects

Opengl Quick Fixes

Merged Opengl Quick Fixes
Sryder/SRB2:openglquickfixes into master
Merged Sryder requested to merge Sryder/SRB2:openglquickfixes into master
  1. Mar 30, 2018
  3. Mar 29, 2018
    • Sryder's avatar
      static tempsec for R_FakeFlat · 65c893da
      Sryder authored 
      I don't fully understand this, but it's what software does and it fixes the issue of the lighting in DSZ3. Also don't need the extra call to R_Prep3DFloors.
      65c893da
  5. Mar 23, 2018
  7. Mar 22, 2018
  9. Mar 21, 2018
    • Sryder's avatar
      Transform sprites in world space rather than screen space · 0885d271
      Sryder authored 
      Transformation based on screen space would make sense if we didn't want anything in the world to effect the sprites.
This should allow sprite splitting and sorting of sprites with level geometry easier.
stransform is no longer needed.
      0885d271
  11. Mar 20, 2018
    • Sryder's avatar
      Some fixes and updates for HWR_SplitWall · 4e95066f
      Sryder authored 
      Solid walls *can* be cut
Fix issues with water and fog FOFs not cutting each other out correctly
Fix Fog colourmap and lighting setting that is done here.
Remove HWR_SplitFog

There is currently a bug with FF_DOUBLESHADOW (that also exists in software) but has a larger impact here. When 2 FF_DOUBLESHADOW lights are directly stacked on each other the bottom one has its height set incorrectly. This causes all the Fog in the timed gravity flipping section of ERZ2 to be drawn and it looks really bad.
      4e95066f
  13. Mar 18, 2018
  15. Mar 17, 2018
  17. Mar 16, 2018
  19. Mar 15, 2018
    • Sryder's avatar
      Translucent floors shouldn't write into the depth buffer · 1b3e1f78
      Sryder authored
      1b3e1f78
    • Sryder's avatar
      Better fog block colouring · 5a4ea9fa
      Sryder authored 
      They still aren't perfect, but now they are at least not quite so obviously just translucent polygons over the level. A mixture between partially modulating the background colours and adding the fog colour. Notably white fog blocks look like they're brightening what's behind them.
Additive was also setting noalphatest before, can probably decide that depending on what it needs anyway. I don't think it's currently used anyway.
      5a4ea9fa
  21. Mar 09, 2018
  23. Mar 08, 2018
  25. Mar 07, 2018
    • Sryder's avatar
      Optimise the screen texture setup for SDL2, Post-processor, and wipes. · 77af3a8f
      Sryder authored 
      Only use glCopyTexImage2D when first creating the screen texture, use glCopyTexSubImage2D anytime after that as it does not define a new texture each time.
Flushing of the screen textures has been implemented for when the screen size changes (so that the screen textures don't stay at a wrong size) and the game is closed, I believe they would leave a memory leak before.
      77af3a8f
    • Sryder's avatar
      Decrease far clipping plane · 67ee1637
      Sryder authored 
      The Far clipping plane did not need to be nearly as high as it was, the new value is 32768, which I suspect is about how far software can render before it completely falls apart.
It is desirable to increase the near clipping plane to between 6-10, but it can introduce more issues with close geometry not being drawn when the player or camera is scaled or viewheight is set to MIN in first person view. It would also stop sprites from being drawn ever so slightly too early, but this isn't too much of an issue and isn't too noticeable with those values. Might look into scaling near clipping plane in accordance to camera scale in the future.
The reason for wanting to increase the near clipping plane is because the small value can cause very noticeable Z-fighting where there shouldn't be on older GPU's, usually Intel ones, that don't support 24-bits for the depth buffer.
      67ee1637
  27. Mar 06, 2018
  29. Sep 15, 2017
  31. Sep 08, 2017
    • Sryder's avatar
      Various Transparent Texture Fixes · db99537a
      Sryder authored 
      Draw Textures and Flats that have holes in them like a solid polygon so they use the depth buffer and don't need to be sorted
Disable all linear filtering on textures and flats that have holes in them, the linear filtering introduces translucency into the textures where the edges are. Leaving them with either a black border, or causing pixels behind the slightly translucent areas to not be drawn. Doesn't apply to sprites and the HUD as they are always already sorted properly.
Make the Alpha Testing more strict on non-translucent blend modes. This makes it so any transparency below 0.5 is discarded instead. Would make anything that is blended and has holes in it look slightly better, only the HUD and MD2s where the texture has holes are effected currently.
Set TF_TRANSPARENT on flat texture flags when there are holes in the texture.
Minor fix to make sure MD2s always set the right blend mode
      db99537a
  33. Sep 07, 2017