Shaders on web fixes:

Our shaders on the web platform can render now all our effects:

1. Bump mapping (normal maps). As shown by demos:
   • bump_mapping (source code).

   • creature_behaviors (source code).

   • third_person_navigation (source code).

   • game_3d_sound (source code).

2. ClipPlane X3D node, useful to clip part of 3D/2D content when rendering. The node can be instantiated using Pascal class TClipPlaneNode or by writing X3D file like this:

   #X3D V3.2 utf8 PROFILE Interchange ClipPlane { plane 1 0 0 -100 } Inline { url "my_model.gltf" }

   1 2 3 4 5 6 7 8

   #X3D V3.2 utf8 PROFILE Interchange   ClipPlane {   plane 1 0 0 -100 }   Inline { url "my_model.gltf" }

   Save this as my_cut_model.x3dv and open (using our Castle Model Viewer, or from Pascal load it using our TCastleScene). In effect, you will see my_model.gltf but cut by a 3D plane. To be precise, the plane equation is Ax+By+Cz+D=0 with the (A,B,C,D) values given by the ClipPlane.plane vector above. The points we render are ones that satisfy Ax+By+Cz+D>=0, so they are in half-space determined by the plane.

3. Fog.

   • Example in eye_of_beholder (source code).
4. TCastleTerrain shader.
   • Used by terrain example (source code).
   • Note: Water used in this demo doesn’t work on web yet — we need to fix our FBO on web.
5. Shader effects using varying, like “time to shader” in Castle Model Viewer (Mobile) on web.

The above features failed to work in the past due to a bug in ANGLE, library used to processes shaders (and optionally render) in both Firefox and Chromium-based browsers (I test with Vivaldi).

• There’s a real bug in the latest Firefox that was affecting us — and it is workarounded now in our engine, so our games rock in Firefox. See my Firefox bugreport and reproduction of the bug, with details why/how ANGLE processes some shaders incorrectly.

• The ANGLE version in the latest Vivaldi is already OK (there was a period when it also exhibited issues).

Occlusion culling on web:

We have fixed how occlusion culling works on the web. We needed to account for the fact that occlusion queries on the web can run for multiple frames.

See the running demo here: occlusion_culling (source code).

Unholy Society demo on web:

We have updated The Unholy Society web demo. We fixed audio, comic bubbles size, “pope call” animation (using ClipPlane, see above). Overall, at this point the complete game works on the web and yes, you can just play it for free here 🙂

Note that the web version doesn’t support persistent savegames (reloading the page will reset the game state), which is of course something we plan to fix soon.

Enjoy and please support us on Patreon to make it possible to continue improving the engine!