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feat(editor): terrain mirror X/Y for symmetric zone design

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- Mirror X: copies left half of terrain to right half (mirrored)
- Mirror Y: copies top half to bottom half (mirrored)
- Useful for creating symmetric zones, arenas, or balanced landscapes
- Auto-stitches all chunk edges after mirror for seamless results
- UI buttons in Sculpt panel under "Mirror Terrain" section
This commit is contained in:
Kelsi 2026-05-05 06:24:28 -07:00
parent ac88aed250
commit dd2b9294b5
3 changed files with 61 additions and 0 deletions
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46
tools/editor/terrain_editor.cpp
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@ -666,6 +666,52 @@ void TerrainEditor::scaleHeights(float factor) {
dirty_ = true;
}
void TerrainEditor::mirrorX() {
if (!terrain_) return;
for (int cy = 0; cy < 16; cy++) {
for (int cx = 0; cx < 8; cx++) {
int srcIdx = cy * 16 + cx;
int dstIdx = cy * 16 + (15 - cx);
auto& src = terrain_->chunks[srcIdx];
auto& dst = terrain_->chunks[dstIdx];
if (!src.hasHeightMap() || !dst.hasHeightMap()) continue;
for (int v = 0; v < 145; v++) {
int row = v / 17, col = v % 17;
if (col > 8) continue;
int mirrorCol = 8 - col;
int mirrorV = row * 17 + mirrorCol;
dst.heightMap.heights[mirrorV] = src.heightMap.heights[v];
}
dirtyChunks_.push_back(dstIdx);
}
}
for (int ci = 0; ci < 256; ci++) stitchEdges(ci);
dirty_ = true;
}
void TerrainEditor::mirrorY() {
if (!terrain_) return;
for (int cy = 0; cy < 8; cy++) {
for (int cx = 0; cx < 16; cx++) {
int srcIdx = cy * 16 + cx;
int dstIdx = (15 - cy) * 16 + cx;
auto& src = terrain_->chunks[srcIdx];
auto& dst = terrain_->chunks[dstIdx];
if (!src.hasHeightMap() || !dst.hasHeightMap()) continue;
for (int v = 0; v < 145; v++) {
int row = v / 17, col = v % 17;
if (col > 8) continue;
int mirrorRow = 8 - row;
int mirrorV = mirrorRow * 17 + col;
dst.heightMap.heights[mirrorV] = src.heightMap.heights[v];
}
dirtyChunks_.push_back(dstIdx);
}
}
for (int ci = 0; ci < 256; ci++) stitchEdges(ci);
dirty_ = true;
}
void TerrainEditor::copyStamp(const glm::vec3& center, float radius) {
if (!terrain_) return;
stampData_.clear();