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feat(editor): path preview line, transform undo, complete undo coverage

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- River/road tool now shows translucent blue path preview ribbon with
  edge lines between start and end points before applying
- Preview follows cursor when waiting for end point, locks when set
- Undo support for all remaining operations: rotateTerrain90, mirrorX,
  mirrorY, scaleHeights, offsetHeights, invertHeights, smoothBeaches
- Every terrain-modifying operation in the editor is now undoable
This commit is contained in:
Kelsi 2026-05-05 13:33:28 -07:00
parent 7e02db73df
commit acfbf19144
5 changed files with 106 additions and 0 deletions
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14
tools/editor/terrain_editor.cpp
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@ -680,6 +680,7 @@ void TerrainEditor::resetToFlat() {
void TerrainEditor::scaleHeights(float factor) {
if (!terrain_) return;
recordGeneratorUndo();
for (int ci = 0; ci < 256; ci++) {
auto& chunk = terrain_->chunks[ci];
if (!chunk.hasHeightMap()) continue;
@ -690,10 +691,12 @@ void TerrainEditor::scaleHeights(float factor) {
// Re-stitch all edges after scaling
for (int ci = 0; ci < 256; ci++) stitchEdges(ci);
dirty_ = true;
commitGeneratorUndo();
}
void TerrainEditor::mirrorX() {
if (!terrain_) return;
recordGeneratorUndo();
for (int cy = 0; cy < 16; cy++) {
for (int cx = 0; cx < 8; cx++) {
int srcIdx = cy * 16 + cx;
@ -713,10 +716,12 @@ void TerrainEditor::mirrorX() {
}
for (int ci = 0; ci < 256; ci++) stitchEdges(ci);
dirty_ = true;
commitGeneratorUndo();
}
void TerrainEditor::mirrorY() {
if (!terrain_) return;
recordGeneratorUndo();
for (int cy = 0; cy < 8; cy++) {
for (int cx = 0; cx < 16; cx++) {
int srcIdx = cy * 16 + cx;
@ -736,6 +741,7 @@ void TerrainEditor::mirrorY() {
}
for (int ci = 0; ci < 256; ci++) stitchEdges(ci);
dirty_ = true;
commitGeneratorUndo();
}
void TerrainEditor::carveRiver(const glm::vec3& start, const glm::vec3& end,
@ -957,6 +963,7 @@ void TerrainEditor::createDunes(float wavelength, float amplitude, float directi
void TerrainEditor::rotateTerrain90() {
if (!terrain_) return;
recordGeneratorUndo();
// Snapshot all outer vertex heights into a 129x129 grid
std::array<std::array<float, 129>, 129> grid{};
for (int cy = 0; cy < 16; cy++) {
@ -998,10 +1005,12 @@ void TerrainEditor::rotateTerrain90() {
}
for (int ci = 0; ci < 256; ci++) stitchEdges(ci);
dirty_ = true;
commitGeneratorUndo();
}
void TerrainEditor::offsetHeights(float amount) {
if (!terrain_) return;
recordGeneratorUndo();
for (int ci = 0; ci < 256; ci++) {
auto& chunk = terrain_->chunks[ci];
if (!chunk.hasHeightMap()) continue;
@ -1010,10 +1019,12 @@ void TerrainEditor::offsetHeights(float amount) {
dirtyChunks_.push_back(ci);
}
dirty_ = true;
commitGeneratorUndo();
}
void TerrainEditor::invertHeights() {
if (!terrain_) return;
recordGeneratorUndo();
// Find midpoint
float minH = 1e30f, maxH = -1e30f;
for (int ci = 0; ci < 256; ci++) {
@ -1034,6 +1045,7 @@ void TerrainEditor::invertHeights() {
}
for (int ci = 0; ci < 256; ci++) stitchEdges(ci);
dirty_ = true;
commitGeneratorUndo();
}
void TerrainEditor::fillWater(float height, uint16_t liquidType) {
@ -1064,6 +1076,7 @@ void TerrainEditor::fillWater(float height, uint16_t liquidType) {
void TerrainEditor::smoothBeaches(float waterHeight, float beachWidth) {
if (!terrain_) return;
recordGeneratorUndo();
for (int ci = 0; ci < 256; ci++) {
auto& chunk = terrain_->chunks[ci];
if (!chunk.hasHeightMap()) continue;
@ -1083,6 +1096,7 @@ void TerrainEditor::smoothBeaches(float waterHeight, float beachWidth) {
if (modified) { stitchEdges(ci); dirtyChunks_.push_back(ci); }
}
dirty_ = true;
commitGeneratorUndo();
}
void TerrainEditor::addDetailNoise(float amplitude, float frequency, uint32_t seed) {