feat(biome): Milestone 2 — Biome Colors + Mountains 10x Height#15
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- Mountains HeightMultiplier increased from 3.0 to 10.0 (user request) - Pass biomeId through per-chunk GPU uniform buffer - Fragment shader: solid color per biome with lighting preserved Grassland=green, Desert=tan, Mountains=grey, Valley=lt-green, Swamp=dark-olive, Forest=deep-green - UNIFORM_BUFFER_SIZE updated to accommodate biomeId float (128 → 144) All Go tests pass. All TS tests pass. Docker prod build verified. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
- selector.go: remove pre-scaling of coords before FBm (was causing double scaling: effective coord was worldX * scale^2 = near-zero, producing flat noise and no biome variety). Now pass raw world coords; FBm handles freq. - Temperature now ranges ~0.0–1.0 giving full biome variety: mountains, desert, swamp, valley, forest all generate correctly - fragment shader: getHeightBlendedColor() blends biome base color toward grey rock (y>60) and snow (y>300) based on worldPos.y, so mountain peaks naturally go grey/white without hard chunk-boundary color edges - Added TestBiomeNoiseProvidesVariety: verifies temp range > 0.4 and at least 3 biome types appear in a 20k×20k scan Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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Milestone 2: Biome Color Variety
Changes
Testing
Part of the 5-milestone biome system plan.