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feat(editor): terrain terrace/step generator for layered landscapes

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- Terrace tool: quantizes terrain heights into N flat shelves
  (like rice paddies, cliff shelves, or stepped pyramids)
- Configurable step count (2-20)
- Finds actual height range and divides evenly
- Auto-stitches chunk edges after terracing
- Useful for creating tiered arenas, agricultural zones, or
  stylized Meso-American terrain
This commit is contained in:
Kelsi 2026-05-05 07:43:10 -07:00
parent f3846919a4
commit 9be32a6634
3 changed files with 45 additions and 0 deletions
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32
tools/editor/terrain_editor.cpp
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@ -860,6 +860,38 @@ void TerrainEditor::createHill(const glm::vec3& center, float radius, float heig
dirty_ = true;
}
void TerrainEditor::terraceHeights(int steps) {
if (!terrain_ || steps < 2) return;
// Find height range
float minH = 1e30f, maxH = -1e30f;
for (int ci = 0; ci < 256; ci++) {
auto& chunk = terrain_->chunks[ci];
if (!chunk.hasHeightMap()) continue;
for (int v = 0; v < 145; v++) {
float h = chunk.position[2] + chunk.heightMap.heights[v];
minH = std::min(minH, h);
maxH = std::max(maxH, h);
}
}
float range = maxH - minH;
if (range < 1.0f) return;
float stepSize = range / steps;
for (int ci = 0; ci < 256; ci++) {
auto& chunk = terrain_->chunks[ci];
if (!chunk.hasHeightMap()) continue;
for (int v = 0; v < 145; v++) {
float absH = chunk.position[2] + chunk.heightMap.heights[v];
float quantized = std::floor((absH - minH) / stepSize) * stepSize + minH;
chunk.heightMap.heights[v] = quantized - chunk.position[2];
}
dirtyChunks_.push_back(ci);
}
for (int ci = 0; ci < 256; ci++) stitchEdges(ci);
dirty_ = true;
}
void TerrainEditor::createCanyon(float width, float depth, uint32_t seed) {
if (!terrain_) return;