Kastell/Assets/Pixel3D

Readme

Todo

• Add trees + leaf shader
• Add water shader
• Add cloud shader (potentially baked onto _ShadowMapTexture?)
• Add random weeds and flowers
• Add frustum culling and occlusion culling to grass
• Pixel perfect camera with zoom and pan
• Fix ghost mesh culling shadows at world origin
• Poor depth outlining on large terrain of steep angles
• Fix grass angle occluded on steep terrain

Info

• https://iquilezles.org/articles/voronoise/
• https://bruop.github.io/frustum_culling/
• https://www.shadertoy.com/playlist/fXlXzf&from=0&num=12
• https://www.shadertoy.com/view/lsl3RH
• https://forum.unity.com/threads/how-to-extract-view-depth-from-a-camera-render-with-a-shader.1506944
• https://ameye.dev/notes/shaders-done-quick/

Priority todo

• Pixel Perfect Outlining [6]
  • Generate pixel perfect outlines around the internal and external edges of all objects [4]
    • Internal [2]
      • Outline [1]
      • Pixel perfect (in majority) [1]
    • External [2]
      • Outline [1]
      • Pixel perfect (in majority) [1]
  • Options: on/off [1], colors [1]
• Pixel Perfect Camera [6]
  • Ensures pixel art remains crisp and clear at different resolutions [2]
    • Downscale [1]
    • Maintain aspect ratio [1]
  • Ensures stability in motion without excessive "jittering" [4]
    • Zoom in (pixel space) [1]
    • Zoom in (world space) [1]
    • Rotation keeping viewport center in place [1]
    • Translation pixel offset [1]
• Foliage Rending [8]
  • Rendering of grass on top of meshes with GPU instancing [2]
    • Rendering [1]
    • GPU instancing [1]
  • Rendering of leaves on top of trees with GPU instancing [2]
    • Rendering [1]
    • GPU instancing [1]
  • Frustum culling and chunking to improve performance [3]
    • Chunking [1.5]
    • Frustum culling [1.5]
  • Options: density, colors, wind speed/strength [1]
• Lighting [8]
  • Cell shader with custom banding textures and real-time lighting [2]
    • Cell shader [1]
    • Custom banding texture [1]
  • Point lights and directional lights with multi-light shading [3]
    • Directional lights [1]
    • Point lights [1]
    • Multi-light [1]
  • Shadows [3]
    • Receive shadows [1]
    • Cast shadows [1]
    • Shadow threshold (for hard/soft shadows) [1]
• Clouds [6]
  • Renders clouds over environment [4]
    • Noise rendering [1]
    • Layered noise [1]
    • Movement [1]
    • Accurate shadow projection [1]
  • Options: cloud coverage [0.66], speed [0.66], direction [0.66]
• Water [6]
  • Renders water and other liquids with reflection and refraction [3]
    • Renders [1]
    • Reflection [1]
    • Refraction [1]
  • Reacts to movement with ripples [2]
    • Ripples [1]
    • React to movement [1]
  • Outline edges for objects both inside and outside the water [0.5]
  • Options: color, absorption, viscosity [0.5]