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Kelsidavis-WoWee/tools/editor/terrain_editor.cpp
Kelsi 7e02db73df feat(editor): generator undo, quit confirmation, state cleanup 
- All terrain generators now undoable: crater, mesa, hill, voronoi,
  dunes, detail noise, thermal erosion, canyon, island, ridge, road,
  river, perlin noise — all wrapped with recordGeneratorUndo/commit
- Unsaved changes warning on quit: Save & Quit / Quit / Cancel dialog
- createNewTerrain clears quest editor and path capture state
- recordGeneratorUndo/commitGeneratorUndo helper methods snapshot all
  256 chunks before/after any generator operation
2026-05-05 13:26:38 -07:00

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#include "terrain_editor.hpp"
#include "core/logger.hpp"
#include <algorithm>
#include <cmath>
#include <fstream>
#include <numeric>
#include <random>
namespace wowee {
namespace editor {
TerrainEditor::TerrainEditor() = default;
pipeline::ADTTerrain TerrainEditor::createBlankTerrain(int tileX, int tileY, float baseHeight,
Biome biome) {
pipeline::ADTTerrain terrain;
terrain.loaded = true;
terrain.version = 18;
terrain.coord = {tileX, tileY};
const auto& biomeTextures = getBiomeTextures(biome);
// Integer grid noise — guarantees shared edge vertices get identical heights
auto gridNoise = [](int gx, int gy) -> float {
uint32_t h = static_cast<uint32_t>(gx * 374761393 + gy * 668265263);
h = (h ^ (h >> 13)) * 1274126177;
h = h ^ (h >> 16);
return (static_cast<float>(h & 0xFFFF) / 65535.0f - 0.5f) * 3.0f;
};
for (int cy = 0; cy < 16; cy++) {
for (int cx = 0; cx < 16; cx++) {
auto& chunk = terrain.chunks[cy * 16 + cx];
chunk.flags = 0;
chunk.indexX = cx;
chunk.indexY = cy;
chunk.holes = 0;
chunk.position[0] = (32.0f - tileX) * TILE_SIZE - cx * CHUNK_SIZE;
chunk.position[1] = (32.0f - tileY) * TILE_SIZE - cy * CHUNK_SIZE;
chunk.position[2] = baseHeight;
chunk.heightMap.loaded = true;
for (int i = 0; i < 145; i++) {
int row = i / 17;
int col = i % 17;
if (col <= 8) {
// Outer vertex — shared at chunk edges
int globalRow = cy * 8 + row;
int globalCol = cx * 8 + col;
chunk.heightMap.heights[i] = gridNoise(globalRow, globalCol);
} else {
// Inner vertex (quad center) — not shared, offset grid
int innerCol = col - 9;
int globalRow = cy * 16 + row * 2 + 1;
int globalCol = cx * 16 + innerCol * 2 + 1;
chunk.heightMap.heights[i] = gridNoise(globalRow, globalCol);
}
}
// Normals pointing up (will be recalculated by renderer)
for (int i = 0; i < 145; i++) {
chunk.normals[i * 3 + 0] = 0;
chunk.normals[i * 3 + 1] = 0;
chunk.normals[i * 3 + 2] = 127;
}
// Base texture layer
pipeline::TextureLayer layer{};
layer.textureId = 0;
layer.flags = 0;
layer.offsetMCAL = 0;
layer.effectId = 0;
chunk.layers.push_back(layer);
}
}
// Biome textures
terrain.textures.push_back(biomeTextures.base);
terrain.textures.push_back(biomeTextures.secondary);
terrain.textures.push_back(biomeTextures.accent);
terrain.textures.push_back(biomeTextures.detail);
return terrain;
}
glm::vec3 TerrainEditor::chunkVertexWorldPos(int chunkIdx, int vertIdx) const {
const auto& chunk = terrain_->chunks[chunkIdx];
int tileX = terrain_->coord.x;
int tileY = terrain_->coord.y;
int cx = chunkIdx % 16;
int cy = chunkIdx / 16;
float tileNW_renderX = (32.0f - static_cast<float>(tileY)) * TILE_SIZE;
float tileNW_renderY = (32.0f - static_cast<float>(tileX)) * TILE_SIZE;
float chunkBaseX = tileNW_renderX - static_cast<float>(cy) * CHUNK_SIZE;
float chunkBaseY = tileNW_renderY - static_cast<float>(cx) * CHUNK_SIZE;
float chunkBaseZ = chunk.position[2];
int row = vertIdx / 17;
int col = vertIdx % 17;
float offsetX = static_cast<float>(col);
float offsetY = static_cast<float>(row);
if (col > 8) {
offsetY += 0.5f;
offsetX -= 8.5f;
}
float unitSize = CHUNK_SIZE / 8.0f;
float x = chunkBaseX - offsetY * unitSize;
float y = chunkBaseY - offsetX * unitSize;
float z = chunkBaseZ + chunk.heightMap.heights[vertIdx];
return glm::vec3(x, y, z);
}
float TerrainEditor::getVertexHeight(int chunkIdx, int vertIdx) const {
return terrain_->chunks[chunkIdx].heightMap.heights[vertIdx];
}
void TerrainEditor::setVertexHeight(int chunkIdx, int vertIdx, float height) {
terrain_->chunks[chunkIdx].heightMap.heights[vertIdx] = height;
}
bool TerrainEditor::raycastTerrain(const rendering::Ray& ray, glm::vec3& hitPos) const {
if (!terrain_) return false;
float bestT = 1e30f;
bool hit = false;
for (int chunkIdx = 0; chunkIdx < 256; chunkIdx++) {
const auto& chunk = terrain_->chunks[chunkIdx];
if (!chunk.hasHeightMap()) continue;
// Quick AABB check using actual vertex extent
glm::vec3 corner0 = chunkVertexWorldPos(chunkIdx, 0);
glm::vec3 corner1 = chunkVertexWorldPos(chunkIdx, 144);
glm::vec3 minB = glm::min(corner0, corner1);
glm::vec3 maxB = glm::max(corner0, corner1);
// Expand Z by actual height range in chunk
float minH = chunk.heightMap.heights[0], maxH = minH;
for (int h = 1; h < 145; h++) {
minH = std::min(minH, chunk.heightMap.heights[h]);
maxH = std::max(maxH, chunk.heightMap.heights[h]);
}
minB.z = chunk.position[2] + minH - 10.0f;
maxB.z = chunk.position[2] + maxH + 10.0f;
// Simple AABB-ray test
float tmin = -1e30f, tmax = 1e30f;
for (int i = 0; i < 3; i++) {
if (std::abs(ray.direction[i]) < 1e-8f) {
if (ray.origin[i] < minB[i] || ray.origin[i] > maxB[i]) { tmin = 1e30f; break; }
} else {
float t1 = (minB[i] - ray.origin[i]) / ray.direction[i];
float t2 = (maxB[i] - ray.origin[i]) / ray.direction[i];
if (t1 > t2) std::swap(t1, t2);
tmin = std::max(tmin, t1);
tmax = std::min(tmax, t2);
}
}
if (tmin > tmax || tmax < 0) continue;
// Triangle intersection for each quad
for (int qy = 0; qy < 8; qy++) {
for (int qx = 0; qx < 8; qx++) {
int center = 9 + qy * 17 + qx;
int tl = center - 9;
int tr = center - 8;
int bl = center + 8;
int br = center + 9;
int tris[4][3] = {{center, tl, tr}, {center, tr, br}, {center, br, bl}, {center, bl, tl}};
for (auto& tri : tris) {
glm::vec3 v0 = chunkVertexWorldPos(chunkIdx, tri[0]);
glm::vec3 v1 = chunkVertexWorldPos(chunkIdx, tri[1]);
glm::vec3 v2 = chunkVertexWorldPos(chunkIdx, tri[2]);
// Moller-Trumbore intersection
glm::vec3 e1 = v1 - v0;
glm::vec3 e2 = v2 - v0;
glm::vec3 h = glm::cross(ray.direction, e2);
float a = glm::dot(e1, h);
if (std::abs(a) < 1e-8f) continue;
float f = 1.0f / a;
glm::vec3 s = ray.origin - v0;
float u = f * glm::dot(s, h);
if (u < 0.0f || u > 1.0f) continue;
glm::vec3 q = glm::cross(s, e1);
float v = f * glm::dot(ray.direction, q);
if (v < 0.0f || u + v > 1.0f) continue;
float t = f * glm::dot(e2, q);
if (t > 0.001f && t < bestT) {
bestT = t;
hitPos = ray.origin + ray.direction * t;
hit = true;
}
}
}
}
}
return hit;
}
std::vector<int> TerrainEditor::getAffectedChunks(const glm::vec3& center, float radius) const {
std::vector<int> result;
for (int i = 0; i < 256; i++) {
if (!terrain_->chunks[i].hasHeightMap()) continue;
// Check if any vertex in chunk is within radius
glm::vec3 c0 = chunkVertexWorldPos(i, 0);
glm::vec3 c1 = chunkVertexWorldPos(i, 144);
glm::vec3 chunkCenter = (c0 + c1) * 0.5f;
float chunkRadius = glm::length(c1 - c0) * 0.5f;
if (glm::length(glm::vec2(chunkCenter.x - center.x, chunkCenter.y - center.y)) < radius + chunkRadius)
result.push_back(i);
}
return result;
}
void TerrainEditor::beginStroke() {
if (!terrain_ || strokeActive_) return;
strokeActive_ = true;
auto affected = getAffectedChunks(brush_.getPosition(), brush_.settings().radius);
// Capture all chunks that could be affected during the entire stroke
std::vector<int> allChunks(256);
std::iota(allChunks.begin(), allChunks.end(), 0);
std::vector<int> valid;
for (int i : allChunks) {
if (terrain_->chunks[i].hasHeightMap()) valid.push_back(i);
}
history_.beginEdit(*terrain_, valid);
}
void TerrainEditor::endStroke() {
if (!strokeActive_) return;
strokeActive_ = false;
history_.endEdit(*terrain_);
}
void TerrainEditor::recordGeneratorUndo() {
if (!terrain_) return;
std::vector<int> valid;
for (int i = 0; i < 256; i++) {
if (terrain_->chunks[i].hasHeightMap()) valid.push_back(i);
}
history_.beginEdit(*terrain_, valid);
}
void TerrainEditor::commitGeneratorUndo() {
if (!terrain_) return;
history_.endEdit(*terrain_);
}
void TerrainEditor::applyBrush(float deltaTime) {
if (!terrain_ || !brush_.isActive()) return;
switch (brush_.settings().mode) {
case BrushMode::Raise: applyRaise(deltaTime); break;
case BrushMode::Lower: applyRaise(deltaTime); break;
case BrushMode::Smooth: applySmooth(deltaTime); break;
case BrushMode::Flatten:
case BrushMode::Level: applyFlatten(deltaTime); break;
case BrushMode::Erode: applyErode(deltaTime); break;
}
}
void TerrainEditor::applyRaise(float dt) {
float amount = brush_.settings().strength * dt;
if (brush_.settings().mode == BrushMode::Lower) amount = -amount;
auto affected = getAffectedChunks(brush_.getPosition(), brush_.settings().radius);
for (int chunkIdx : affected) {
bool modified = false;
for (int v = 0; v < 145; v++) {
glm::vec3 pos = chunkVertexWorldPos(chunkIdx, v);
float dist = glm::length(glm::vec2(pos.x - brush_.getPosition().x,
pos.y - brush_.getPosition().y));
float influence = brush_.getInfluence(dist);
if (influence > 0.0f) {
float h = getVertexHeight(chunkIdx, v);
setVertexHeight(chunkIdx, v, h + amount * influence);
modified = true;
}
}
if (modified) {
stitchEdges(chunkIdx);
if (std::find(dirtyChunks_.begin(), dirtyChunks_.end(), chunkIdx) == dirtyChunks_.end())
dirtyChunks_.push_back(chunkIdx);
dirty_ = true;
}
}
}
void TerrainEditor::applySmooth(float dt) {
float factor = std::min(1.0f, brush_.settings().strength * dt * 0.5f);
auto affected = getAffectedChunks(brush_.getPosition(), brush_.settings().radius);
// Build a snapshot of all heights so we read from consistent state
std::array<std::array<float, 145>, 256> snapshot;
for (int ci : affected)
for (int v = 0; v < 145; v++)
snapshot[ci][v] = getVertexHeight(ci, v);
// Helper: get height of vertex at global outer grid position,
// looking across chunk boundaries
auto getGlobalOuterHeight = [&](int chunkIdx, int row, int col) -> float {
int cx = chunkIdx % 16;
int cy = chunkIdx / 16;
// If within chunk bounds, return directly
if (row >= 0 && row <= 8 && col >= 0 && col <= 8) {
int vi = row * 17 + col;
return snapshot[chunkIdx][vi];
}
// Cross into adjacent chunk
int ncx = cx, ncy = cy;
int nr = row, nc = col;
if (row < 0) { ncy = cy - 1; nr = 8; }
if (row > 8) { ncy = cy + 1; nr = 0; }
if (col < 0) { ncx = cx - 1; nc = 8; }
if (col > 8) { ncx = cx + 1; nc = 0; }
if (ncx < 0 || ncx > 15 || ncy < 0 || ncy > 15)
return snapshot[chunkIdx][std::clamp(row, 0, 8) * 17 + std::clamp(col, 0, 8)];
int nci = ncy * 16 + ncx;
if (!terrain_->chunks[nci].hasHeightMap())
return snapshot[chunkIdx][std::clamp(row, 0, 8) * 17 + std::clamp(col, 0, 8)];
int vi = nr * 17 + nc;
return snapshot[nci][vi];
};
for (int chunkIdx : affected) {
bool modified = false;
for (int v = 0; v < 145; v++) {
glm::vec3 pos = chunkVertexWorldPos(chunkIdx, v);
float dist = glm::length(glm::vec2(pos.x - brush_.getPosition().x,
pos.y - brush_.getPosition().y));
float influence = brush_.getInfluence(dist);
if (influence <= 0.0f) continue;
int row = v / 17;
int col = v % 17;
float sum = 0.0f;
int count = 0;
if (col <= 8) {
// Outer vertex — sample 4 neighbors, crossing chunk borders
int dirs[][2] = {{-1, 0}, {1, 0}, {0, -1}, {0, 1}};
for (auto& d : dirs) {
sum += getGlobalOuterHeight(chunkIdx, row + d[0], col + d[1]);
count++;
}
} else {
// Inner vertex — use same-chunk neighbors only
int neighbors[] = {v - 17, v + 17, v - 1, v + 1};
for (int n : neighbors) {
if (n >= 0 && n < 145) {
sum += snapshot[chunkIdx][n];
count++;
}
}
}
if (count > 0) {
float avg = sum / static_cast<float>(count);
float h = snapshot[chunkIdx][v];
float newH = h + (avg - h) * factor * influence;
if (newH != h) {
setVertexHeight(chunkIdx, v, newH);
modified = true;
}
}
}
if (modified) {
stitchEdges(chunkIdx);
if (std::find(dirtyChunks_.begin(), dirtyChunks_.end(), chunkIdx) == dirtyChunks_.end())
dirtyChunks_.push_back(chunkIdx);
dirty_ = true;
}
}
}
void TerrainEditor::stitchEdges(int chunkIdx) {
int cx = chunkIdx % 16;
int cy = chunkIdx / 16;
auto pushDirty = [&](int idx) {
if (std::find(dirtyChunks_.begin(), dirtyChunks_.end(), idx) == dirtyChunks_.end())
dirtyChunks_.push_back(idx);
};
if (cx < 15) {
int n = cy * 16 + cx + 1;
if (terrain_->chunks[n].hasHeightMap()) {
for (int r = 0; r <= 8; r++)
setVertexHeight(n, r * 17, getVertexHeight(chunkIdx, r * 17 + 8));
pushDirty(n);
}
}
if (cx > 0) {
int n = cy * 16 + cx - 1;
if (terrain_->chunks[n].hasHeightMap()) {
for (int r = 0; r <= 8; r++)
setVertexHeight(n, r * 17 + 8, getVertexHeight(chunkIdx, r * 17));
pushDirty(n);
}
}
if (cy < 15) {
int n = (cy + 1) * 16 + cx;
if (terrain_->chunks[n].hasHeightMap()) {
for (int c = 0; c <= 8; c++)
setVertexHeight(n, c, getVertexHeight(chunkIdx, 8 * 17 + c));
pushDirty(n);
}
}
if (cy > 0) {
int n = (cy - 1) * 16 + cx;
if (terrain_->chunks[n].hasHeightMap()) {
for (int c = 0; c <= 8; c++)
setVertexHeight(n, 8 * 17 + c, getVertexHeight(chunkIdx, c));
pushDirty(n);
}
}
}
void TerrainEditor::applyFlatten(float dt) {
float factor = std::min(1.0f, brush_.settings().strength * dt * 0.3f);
float targetH = brush_.settings().flattenHeight;
auto affected = getAffectedChunks(brush_.getPosition(), brush_.settings().radius);
for (int chunkIdx : affected) {
bool modified = false;
for (int v = 0; v < 145; v++) {
glm::vec3 pos = chunkVertexWorldPos(chunkIdx, v);
float dist = glm::length(glm::vec2(pos.x - brush_.getPosition().x,
pos.y - brush_.getPosition().y));
float influence = brush_.getInfluence(dist);
if (influence <= 0.0f) continue;
float h = getVertexHeight(chunkIdx, v);
// targetH is absolute world Z; heights are relative to chunk base
float relTarget = targetH - terrain_->chunks[chunkIdx].position[2];
float newH = h + (relTarget - h) * factor * influence;
if (newH != h) {
setVertexHeight(chunkIdx, v, newH);
modified = true;
}
}
if (modified) {
stitchEdges(chunkIdx);
if (std::find(dirtyChunks_.begin(), dirtyChunks_.end(), chunkIdx) == dirtyChunks_.end())
dirtyChunks_.push_back(chunkIdx);
dirty_ = true;
}
}
}
std::vector<int> TerrainEditor::consumeDirtyChunks() {
std::vector<int> result;
result.swap(dirtyChunks_);
return result;
}
pipeline::TerrainMesh TerrainEditor::regenerateMesh() const {
if (!terrain_) return {};
return pipeline::TerrainMeshGenerator::generate(*terrain_);
}
pipeline::ChunkMesh TerrainEditor::regenerateChunkMesh(int chunkIndex) const {
if (!terrain_) return {};
auto mesh = pipeline::TerrainMeshGenerator::generate(*terrain_);
return mesh.chunks[chunkIndex];
}
void TerrainEditor::undo() {
if (!terrain_) return;
history_.undo(*terrain_);
for (int idx : history_.lastAffectedChunks()) {
if (std::find(dirtyChunks_.begin(), dirtyChunks_.end(), idx) == dirtyChunks_.end())
dirtyChunks_.push_back(idx);
}
}
void TerrainEditor::recalcNormals(const std::vector<int>& chunkIndices) {
if (!terrain_) return;
float unitSize = CHUNK_SIZE / 8.0f;
for (int ci : chunkIndices) {
auto& chunk = terrain_->chunks[ci];
if (!chunk.hasHeightMap()) continue;
for (int i = 0; i < 145; i++) {
int row = i / 17;
int col = i % 17;
// Get heights of neighbors
float hC = chunk.heightMap.heights[i];
float hL = hC, hR = hC, hU = hC, hD = hC;
if (col <= 8) {
// Outer vertex
int li = row * 17 + std::max(0, col - 1);
int ri = row * 17 + std::min(8, col + 1);
int ui = std::max(0, row - 1) * 17 + col;
int di = std::min(8, row + 1) * 17 + col;
hL = chunk.heightMap.heights[li];
hR = chunk.heightMap.heights[ri];
hU = chunk.heightMap.heights[ui];
hD = chunk.heightMap.heights[di];
} else {
// Inner vertex — use adjacent outer verts
int innerCol = col - 9;
int tl = row * 17 + innerCol;
int tr = row * 17 + innerCol + 1;
int bl = (row + 1) * 17 + innerCol;
int br = (row + 1) * 17 + innerCol + 1;
if (tl >= 0 && tl < 145) hU = chunk.heightMap.heights[tl];
if (tr >= 0 && tr < 145) hR = chunk.heightMap.heights[tr];
if (bl >= 0 && bl < 145) hD = chunk.heightMap.heights[bl];
if (br >= 0 && br < 145) hL = chunk.heightMap.heights[br];
}
// Compute normal from height differences
float dx = (hL - hR) / (2.0f * unitSize);
float dy = (hU - hD) / (2.0f * unitSize);
float len = std::sqrt(dx * dx + dy * dy + 1.0f);
glm::vec3 n(dx / len, dy / len, 1.0f / len);
chunk.normals[i * 3 + 0] = static_cast<int8_t>(n.x * 127.0f);
chunk.normals[i * 3 + 1] = static_cast<int8_t>(n.y * 127.0f);
chunk.normals[i * 3 + 2] = static_cast<int8_t>(n.z * 127.0f);
}
}
}
void TerrainEditor::redo() {
if (!terrain_) return;
history_.redo(*terrain_);
for (int idx : history_.lastAffectedChunks()) {
if (std::find(dirtyChunks_.begin(), dirtyChunks_.end(), idx) == dirtyChunks_.end())
dirtyChunks_.push_back(idx);
}
}
void TerrainEditor::setWaterLevel(const glm::vec3& center, float radius,
float waterHeight, uint16_t liquidType) {
if (!terrain_) return;
auto affected = getAffectedChunks(center, radius);
for (int chunkIdx : affected) {
auto& water = terrain_->waterData[chunkIdx];
if (water.layers.empty()) {
pipeline::ADTTerrain::WaterLayer wl;
wl.liquidType = liquidType;
wl.flags = 0;
wl.minHeight = waterHeight;
wl.maxHeight = waterHeight;
wl.x = 0;
wl.y = 0;
wl.width = 9;
wl.height = 9;
wl.heights.assign(81, waterHeight);
wl.mask.assign(8, 0xFF);
water.layers.push_back(wl);
} else {
auto& wl = water.layers[0];
wl.minHeight = waterHeight;
wl.maxHeight = waterHeight;
wl.liquidType = liquidType;
std::fill(wl.heights.begin(), wl.heights.end(), waterHeight);
}
if (std::find(dirtyChunks_.begin(), dirtyChunks_.end(), chunkIdx) == dirtyChunks_.end())
dirtyChunks_.push_back(chunkIdx);
dirty_ = true;
}
}
void TerrainEditor::removeWater(const glm::vec3& center, float radius) {
if (!terrain_) return;
auto affected = getAffectedChunks(center, radius);
for (int chunkIdx : affected) {
terrain_->waterData[chunkIdx].layers.clear();
if (std::find(dirtyChunks_.begin(), dirtyChunks_.end(), chunkIdx) == dirtyChunks_.end())
dirtyChunks_.push_back(chunkIdx);
dirty_ = true;
}
}
void TerrainEditor::smoothEntireTile(int iterations) {
if (!terrain_) return;
for (int iter = 0; iter < iterations; iter++) {
// Snapshot all heights
std::array<std::array<float, 145>, 256> snap;
for (int ci = 0; ci < 256; ci++)
for (int v = 0; v < 145; v++)
snap[ci][v] = terrain_->chunks[ci].heightMap.heights[v];
for (int ci = 0; ci < 256; ci++) {
auto& chunk = terrain_->chunks[ci];
if (!chunk.hasHeightMap()) continue;
int cx = ci % 16, cy = ci / 16;
for (int v = 0; v < 145; v++) {
int row = v / 17, col = v % 17;
if (col > 8) continue; // smooth outer vertices only
float sum = snap[ci][v];
int count = 1;
// Same-chunk neighbors
if (col > 0) { sum += snap[ci][row * 17 + col - 1]; count++; }
if (col < 8) { sum += snap[ci][row * 17 + col + 1]; count++; }
if (row > 0) { sum += snap[ci][(row - 1) * 17 + col]; count++; }
if (row < 8) { sum += snap[ci][(row + 1) * 17 + col]; count++; }
// Cross-chunk neighbors at edges
if (col == 0 && cx > 0) { sum += snap[cy * 16 + cx - 1][row * 17 + 8]; count++; }
if (col == 8 && cx < 15) { sum += snap[cy * 16 + cx + 1][row * 17 + 0]; count++; }
if (row == 0 && cy > 0) { sum += snap[(cy - 1) * 16 + cx][8 * 17 + col]; count++; }
if (row == 8 && cy < 15) { sum += snap[(cy + 1) * 16 + cx][0 * 17 + col]; count++; }
chunk.heightMap.heights[v] = sum / static_cast<float>(count);
}
// Update inner vertices from smoothed outer vertices
for (int v = 0; v < 145; v++) {
int row = v / 17, col = v % 17;
if (col <= 8) continue;
int innerCol = col - 9;
// Average of 4 surrounding outer vertices
int tl = row * 17 + innerCol;
int tr = row * 17 + innerCol + 1;
int bl = (row + 1) * 17 + innerCol;
int br = (row + 1) * 17 + innerCol + 1;
if (tl < 145 && tr < 145 && bl < 145 && br < 145)
chunk.heightMap.heights[v] = (chunk.heightMap.heights[tl] +
chunk.heightMap.heights[tr] + chunk.heightMap.heights[bl] +
chunk.heightMap.heights[br]) * 0.25f;
}
}
// Stitch all edges
for (int ci = 0; ci < 256; ci++)
stitchEdges(ci);
}
for (int ci = 0; ci < 256; ci++)
dirtyChunks_.push_back(ci);
dirty_ = true;
}
void TerrainEditor::resetToFlat() {
if (!terrain_) return;
for (int ci = 0; ci < 256; ci++) {
auto& chunk = terrain_->chunks[ci];
if (!chunk.hasHeightMap()) continue;
chunk.heightMap.heights.fill(0.0f);
dirtyChunks_.push_back(ci);
}
for (int ci = 0; ci < 256; ci++) stitchEdges(ci);
dirty_ = true;
}
void TerrainEditor::scaleHeights(float factor) {
if (!terrain_) return;
for (int ci = 0; ci < 256; ci++) {
auto& chunk = terrain_->chunks[ci];
if (!chunk.hasHeightMap()) continue;
for (int v = 0; v < 145; v++)
chunk.heightMap.heights[v] *= factor;
dirtyChunks_.push_back(ci);
}
// Re-stitch all edges after scaling
for (int ci = 0; ci < 256; ci++) stitchEdges(ci);
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::carveRiver(const glm::vec3& start, const glm::vec3& end,
float width, float depth) {
if (!terrain_) return;
recordGeneratorUndo();
glm::vec2 lineStart(start.x, start.y);
glm::vec2 lineEnd(end.x, end.y);
glm::vec2 lineDir = glm::normalize(lineEnd - lineStart);
float lineLen = glm::length(lineEnd - lineStart);
for (int ci = 0; ci < 256; ci++) {
auto& chunk = terrain_->chunks[ci];
if (!chunk.hasHeightMap()) continue;
bool modified = false;
for (int v = 0; v < 145; v++) {
glm::vec3 pos = chunkVertexWorldPos(ci, v);
glm::vec2 p(pos.x, pos.y);
// Project point onto line segment
glm::vec2 toP = p - lineStart;
float t = glm::dot(toP, lineDir);
t = std::clamp(t, 0.0f, lineLen);
glm::vec2 closest = lineStart + lineDir * t;
float dist = glm::length(p - closest);
if (dist < width) {
float falloff = 1.0f - (dist / width);
falloff = falloff * falloff; // smooth edges
float carve = depth * falloff;
chunk.heightMap.heights[v] -= carve;
modified = true;
}
}
if (modified) {
stitchEdges(ci);
dirtyChunks_.push_back(ci);
}
}
dirty_ = true;
commitGeneratorUndo();
}
void TerrainEditor::createCrater(const glm::vec3& center, float radius, float depth, float rimHeight) {
if (!terrain_) return;
recordGeneratorUndo();
for (int ci = 0; ci < 256; ci++) {
auto& chunk = terrain_->chunks[ci];
if (!chunk.hasHeightMap()) continue;
bool modified = false;
for (int v = 0; v < 145; v++) {
glm::vec3 pos = chunkVertexWorldPos(ci, v);
float dist = glm::length(glm::vec2(pos.x - center.x, pos.y - center.y));
if (dist > radius * 1.3f) continue;
float t = dist / radius;
float delta = 0.0f;
if (t < 0.8f) {
// Bowl interior: parabolic depression
float bowlT = t / 0.8f;
delta = -depth * (1.0f - bowlT * bowlT);
} else if (t < 1.0f) {
// Rim: raised edge
float rimT = (t - 0.8f) / 0.2f;
delta = rimHeight * std::sin(rimT * 3.14159f);
} else if (t < 1.3f) {
// Outer falloff
float fallT = (t - 1.0f) / 0.3f;
delta = rimHeight * (1.0f - fallT) * 0.3f;
}
chunk.heightMap.heights[v] += delta;
modified = true;
}
if (modified) {
stitchEdges(ci);
dirtyChunks_.push_back(ci);
}
}
dirty_ = true;
commitGeneratorUndo();
}
void TerrainEditor::createMesa(const glm::vec3& center, float radius, float height, float edgeSteepness) {
if (!terrain_) return;
recordGeneratorUndo();
for (int ci = 0; ci < 256; ci++) {
auto& chunk = terrain_->chunks[ci];
if (!chunk.hasHeightMap()) continue;
bool modified = false;
for (int v = 0; v < 145; v++) {
glm::vec3 pos = chunkVertexWorldPos(ci, v);
float dist = glm::length(glm::vec2(pos.x - center.x, pos.y - center.y));
if (dist > radius * 1.5f) continue;
float t = dist / radius;
float blend;
if (t < 0.7f) {
blend = 1.0f; // flat top
} else if (t < 1.0f) {
float edgeT = (t - 0.7f) / 0.3f;
blend = 1.0f - std::pow(edgeT, 1.0f / std::max(0.1f, edgeSteepness));
} else {
blend = 0.0f;
}
chunk.heightMap.heights[v] += height * blend;
modified = true;
}
if (modified) {
stitchEdges(ci);
dirtyChunks_.push_back(ci);
}
}
dirty_ = true;
commitGeneratorUndo();
}
void TerrainEditor::createHill(const glm::vec3& center, float radius, float height) {
if (!terrain_) return;
recordGeneratorUndo();
for (int ci = 0; ci < 256; ci++) {
auto& chunk = terrain_->chunks[ci];
if (!chunk.hasHeightMap()) continue;
bool modified = false;
for (int v = 0; v < 145; v++) {
glm::vec3 pos = chunkVertexWorldPos(ci, v);
float dist = glm::length(glm::vec2(pos.x - center.x, pos.y - center.y));
if (dist >= radius) continue;
float t = dist / radius;
float blend = (1.0f - t * t) * (1.0f - t * t); // smooth bell curve
chunk.heightMap.heights[v] += height * blend;
modified = true;
}
if (modified) { stitchEdges(ci); dirtyChunks_.push_back(ci); }
}
dirty_ = true;
commitGeneratorUndo();
}
void TerrainEditor::applyVoronoiNoise(int cellCount, float amplitude, uint32_t seed) {
if (!terrain_) return;
recordGeneratorUndo();
float tileNW_X = (32.0f - static_cast<float>(terrain_->coord.y)) * TILE_SIZE;
float tileNW_Y = (32.0f - static_cast<float>(terrain_->coord.x)) * TILE_SIZE;
// Generate random cell centers
std::mt19937 rng(seed);
std::uniform_real_distribution<float> distX(tileNW_X - TILE_SIZE, tileNW_X);
std::uniform_real_distribution<float> distY(tileNW_Y - TILE_SIZE, tileNW_Y);
std::uniform_real_distribution<float> distH(0.0f, amplitude);
struct Cell { float x, y, h; };
std::vector<Cell> cells(cellCount);
for (auto& c : cells) { c.x = distX(rng); c.y = distY(rng); c.h = distH(rng); }
for (int ci = 0; ci < 256; ci++) {
auto& chunk = terrain_->chunks[ci];
if (!chunk.hasHeightMap()) continue;
for (int v = 0; v < 145; v++) {
glm::vec3 pos = chunkVertexWorldPos(ci, v);
// Find nearest two cells
float d1 = 1e30f, d2 = 1e30f;
float h1 = 0;
for (const auto& c : cells) {
float d = (pos.x - c.x) * (pos.x - c.x) + (pos.y - c.y) * (pos.y - c.y);
if (d < d1) { d2 = d1; d1 = d; h1 = c.h; }
else if (d < d2) { d2 = d; }
}
// F2-F1 creates ridge patterns at cell boundaries
float edge = std::sqrt(d2) - std::sqrt(d1);
float edgeNorm = std::min(edge / 30.0f, 1.0f);
chunk.heightMap.heights[v] += h1 * (1.0f - edgeNorm * 0.5f);
}
dirtyChunks_.push_back(ci);
}
for (int ci = 0; ci < 256; ci++) stitchEdges(ci);
dirty_ = true;
commitGeneratorUndo();
}
void TerrainEditor::createDunes(float wavelength, float amplitude, float direction, uint32_t seed) {
if (!terrain_) return;
recordGeneratorUndo();
float dirRad = direction * 3.14159f / 180.0f;
float dx = std::cos(dirRad), dy = std::sin(dirRad);
// Secondary wave for variation
auto hash = [](int x, uint32_t s) -> float {
uint32_t h = static_cast<uint32_t>(x * 374761393 + s * 668265263);
h = (h ^ (h >> 13)) * 1274126177;
return (static_cast<float>(h & 0xFFFF) / 65535.0f - 0.5f) * 2.0f;
};
for (int ci = 0; ci < 256; ci++) {
auto& chunk = terrain_->chunks[ci];
if (!chunk.hasHeightMap()) continue;
for (int v = 0; v < 145; v++) {
glm::vec3 pos = chunkVertexWorldPos(ci, v);
float proj = pos.x * dx + pos.y * dy;
float wave = std::sin(proj / wavelength * 6.2832f) * amplitude;
float secondary = std::sin(proj / (wavelength * 2.3f) * 6.2832f + seed * 0.1f) * amplitude * 0.3f;
float perp = pos.x * dy - pos.y * dx;
float variation = hash(static_cast<int>(perp * 0.1f), seed) * amplitude * 0.15f;
chunk.heightMap.heights[v] += wave + secondary + variation;
}
dirtyChunks_.push_back(ci);
}
for (int ci = 0; ci < 256; ci++) stitchEdges(ci);
dirty_ = true;
commitGeneratorUndo();
}
void TerrainEditor::rotateTerrain90() {
if (!terrain_) return;
// Snapshot all outer vertex heights into a 129x129 grid
std::array<std::array<float, 129>, 129> grid{};
for (int cy = 0; cy < 16; cy++) {
for (int cx = 0; cx < 16; cx++) {
auto& chunk = terrain_->chunks[cy * 16 + cx];
if (!chunk.hasHeightMap()) continue;
for (int v = 0; v < 145; v++) {
int row = v / 17, col = v % 17;
if (col > 8) continue;
grid[cy * 8 + row][cx * 8 + col] = chunk.heightMap.heights[v];
}
}
}
// Rotate 90 degrees CW: new[x][128-y] = old[y][x]
std::array<std::array<float, 129>, 129> rotated{};
for (int y = 0; y < 129; y++)
for (int x = 0; x < 129; x++)
rotated[x][128 - y] = grid[y][x];
// Write back
for (int cy = 0; cy < 16; cy++) {
for (int cx = 0; cx < 16; cx++) {
auto& chunk = terrain_->chunks[cy * 16 + cx];
if (!chunk.hasHeightMap()) continue;
for (int v = 0; v < 145; v++) {
int row = v / 17, col = v % 17;
if (col > 8) {
// Inner vertex: average of surrounding outer
int innerCol = col - 9;
int gy = cy * 8 + row, gx = cx * 8 + innerCol;
if (gy < 128 && gx < 128)
chunk.heightMap.heights[v] = (rotated[gy][gx] + rotated[gy][gx+1] +
rotated[gy+1][gx] + rotated[gy+1][gx+1]) * 0.25f;
} else {
chunk.heightMap.heights[v] = rotated[cy * 8 + row][cx * 8 + col];
}
}
dirtyChunks_.push_back(cy * 16 + cx);
}
}
for (int ci = 0; ci < 256; ci++) stitchEdges(ci);
dirty_ = true;
}
void TerrainEditor::offsetHeights(float amount) {
if (!terrain_) return;
for (int ci = 0; ci < 256; ci++) {
auto& chunk = terrain_->chunks[ci];
if (!chunk.hasHeightMap()) continue;
for (int v = 0; v < 145; v++)
chunk.heightMap.heights[v] += amount;
dirtyChunks_.push_back(ci);
}
dirty_ = true;
}
void TerrainEditor::invertHeights() {
if (!terrain_) return;
// Find midpoint
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++) {
minH = std::min(minH, chunk.heightMap.heights[v]);
maxH = std::max(maxH, chunk.heightMap.heights[v]);
}
}
float mid = (minH + maxH) * 0.5f;
for (int ci = 0; ci < 256; ci++) {
auto& chunk = terrain_->chunks[ci];
if (!chunk.hasHeightMap()) continue;
for (int v = 0; v < 145; v++)
chunk.heightMap.heights[v] = mid - (chunk.heightMap.heights[v] - mid);
dirtyChunks_.push_back(ci);
}
for (int ci = 0; ci < 256; ci++) stitchEdges(ci);
dirty_ = true;
}
void TerrainEditor::fillWater(float height, uint16_t liquidType) {
if (!terrain_) return;
for (int ci = 0; ci < 256; ci++) {
auto& water = terrain_->waterData[ci];
if (water.layers.empty()) {
pipeline::ADTTerrain::WaterLayer wl;
wl.liquidType = liquidType;
wl.flags = 0;
wl.minHeight = height;
wl.maxHeight = height;
wl.x = 0; wl.y = 0; wl.width = 9; wl.height = 9;
wl.heights.assign(81, height);
wl.mask.assign(8, 0xFF);
water.layers.push_back(wl);
} else {
auto& wl = water.layers[0];
wl.liquidType = liquidType;
wl.minHeight = height;
wl.maxHeight = height;
std::fill(wl.heights.begin(), wl.heights.end(), height);
}
dirtyChunks_.push_back(ci);
}
dirty_ = true;
}
void TerrainEditor::smoothBeaches(float waterHeight, float beachWidth) {
if (!terrain_) return;
for (int ci = 0; ci < 256; ci++) {
auto& chunk = terrain_->chunks[ci];
if (!chunk.hasHeightMap()) continue;
bool modified = false;
for (int v = 0; v < 145; v++) {
float absH = chunk.position[2] + chunk.heightMap.heights[v];
float distToWater = std::abs(absH - waterHeight);
if (distToWater < beachWidth) {
// Smooth toward water level with gentle slope
float t = distToWater / beachWidth;
float target = waterHeight + (absH > waterHeight ? 1.0f : -1.0f) * beachWidth * t * t;
float relTarget = target - chunk.position[2];
chunk.heightMap.heights[v] = chunk.heightMap.heights[v] * 0.3f + relTarget * 0.7f;
modified = true;
}
}
if (modified) { stitchEdges(ci); dirtyChunks_.push_back(ci); }
}
dirty_ = true;
}
void TerrainEditor::addDetailNoise(float amplitude, float frequency, uint32_t seed) {
recordGeneratorUndo();
if (!terrain_) return;
auto hash2d = [](int x, int y, uint32_t s) -> float {
uint32_t h = static_cast<uint32_t>(x * 374761393 + y * 668265263 + s);
h = (h ^ (h >> 13)) * 1274126177;
h = h ^ (h >> 16);
return (static_cast<float>(h & 0xFFFF) / 65535.0f - 0.5f) * 2.0f;
};
for (int ci = 0; ci < 256; ci++) {
auto& chunk = terrain_->chunks[ci];
if (!chunk.hasHeightMap()) continue;
for (int v = 0; v < 145; v++) {
glm::vec3 pos = chunkVertexWorldPos(ci, v);
int ix = static_cast<int>(std::floor(pos.x * frequency));
int iy = static_cast<int>(std::floor(pos.y * frequency));
chunk.heightMap.heights[v] += hash2d(ix, iy, seed) * amplitude;
}
dirtyChunks_.push_back(ci);
}
for (int ci = 0; ci < 256; ci++) stitchEdges(ci);
dirty_ = true;
}
void TerrainEditor::rampEdges(float targetHeight, float rampWidth) {
if (!terrain_) return;
float relTarget = targetHeight - terrain_->chunks[0].position[2];
// Note: only affects terrain heights, not water levels
for (int ci = 0; ci < 256; ci++) {
auto& chunk = terrain_->chunks[ci];
if (!chunk.hasHeightMap()) continue;
int cx = ci % 16, cy = ci / 16;
for (int v = 0; v < 145; v++) {
int row = v / 17, col = v % 17;
if (col > 8) continue;
// Distance to nearest tile edge (in chunk units)
float edgeDistX = std::min(static_cast<float>(cx * 8 + col),
static_cast<float>(128 - cx * 8 - col)) / 128.0f;
float edgeDistY = std::min(static_cast<float>(cy * 8 + row),
static_cast<float>(128 - cy * 8 - row)) / 128.0f;
float edgeDist = std::min(edgeDistX, edgeDistY);
float rampNorm = rampWidth / 128.0f;
if (edgeDist < rampNorm) {
float t = edgeDist / rampNorm;
float blend = t * t; // smooth start
chunk.heightMap.heights[v] = chunk.heightMap.heights[v] * blend +
relTarget * (1.0f - blend);
}
}
dirtyChunks_.push_back(ci);
}
for (int ci = 0; ci < 256; ci++) stitchEdges(ci);
dirty_ = true;
commitGeneratorUndo();
}
void TerrainEditor::thermalErosion(int iterations, float talusAngle) {
recordGeneratorUndo();
if (!terrain_) return;
float unitSize = CHUNK_SIZE / 8.0f;
float maxDelta = std::tan(talusAngle * 3.14159f / 180.0f) * unitSize;
for (int iter = 0; iter < iterations; iter++) {
for (int ci = 0; ci < 256; ci++) {
auto& chunk = terrain_->chunks[ci];
if (!chunk.hasHeightMap()) continue;
for (int v = 0; v < 145; v++) {
int row = v / 17, col = v % 17;
if (col > 8) continue;
float h = chunk.heightMap.heights[v];
int neighbors[] = {v - 17, v + 17, v - 1, v + 1};
for (int n : neighbors) {
if (n < 0 || n >= 145) continue;
int nRow = n / 17, nCol = n % 17;
if (nCol > 8 || std::abs(nRow - row) > 1 || std::abs(nCol - col) > 1) continue;
float nh = chunk.heightMap.heights[n];
float delta = h - nh;
if (delta > maxDelta) {
float transfer = (delta - maxDelta) * 0.25f;
chunk.heightMap.heights[v] -= transfer;
chunk.heightMap.heights[n] += transfer;
}
}
}
}
}
for (int ci = 0; ci < 256; ci++) {
stitchEdges(ci);
dirtyChunks_.push_back(ci);
}
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;
commitGeneratorUndo();
}
void TerrainEditor::createCanyon(float width, float depth, uint32_t seed) {
recordGeneratorUndo();
if (!terrain_) return;
float tileNW_X = (32.0f - static_cast<float>(terrain_->coord.y)) * TILE_SIZE;
float tileNW_Y = (32.0f - static_cast<float>(terrain_->coord.x)) * TILE_SIZE;
float tileCenter_X = tileNW_X - TILE_SIZE * 0.5f;
float tileCenter_Y = tileNW_Y - TILE_SIZE * 0.5f;
// Generate a winding path using sine waves
auto canyonPath = [&](float t) -> glm::vec2 {
float px = tileCenter_X + (t - 0.5f) * TILE_SIZE * 0.9f;
float py = tileCenter_Y + std::sin(t * 6.28f * 1.5f + seed * 0.1f) * TILE_SIZE * 0.2f
+ std::sin(t * 6.28f * 3.0f + seed * 0.3f) * TILE_SIZE * 0.05f;
return glm::vec2(px, py);
};
for (int ci = 0; ci < 256; ci++) {
auto& chunk = terrain_->chunks[ci];
if (!chunk.hasHeightMap()) continue;
bool modified = false;
for (int v = 0; v < 145; v++) {
glm::vec3 pos = chunkVertexWorldPos(ci, v);
glm::vec2 p(pos.x, pos.y);
// Find nearest point on canyon path
float bestDist = 1e30f;
for (float t = 0.0f; t <= 1.0f; t += 0.005f) {
glm::vec2 cp = canyonPath(t);
float d = glm::length(p - cp);
bestDist = std::min(bestDist, d);
}
if (bestDist < width) {
float falloff = 1.0f - (bestDist / width);
falloff = falloff * falloff;
chunk.heightMap.heights[v] -= depth * falloff;
modified = true;
}
}
if (modified) { stitchEdges(ci); dirtyChunks_.push_back(ci); }
}
dirty_ = true;
commitGeneratorUndo();
}
void TerrainEditor::createIsland(float centerHeight, float edgeDropoff) {
if (!terrain_) return;
recordGeneratorUndo();
// Island shape: distance from tile center determines height
// Center is high, edges drop below base height (underwater)
float tileCenterX = 0, tileCenterY = 0;
// Compute tile center from first chunk
{
float tileNW_X = (32.0f - static_cast<float>(terrain_->coord.y)) * TILE_SIZE;
float tileNW_Y = (32.0f - static_cast<float>(terrain_->coord.x)) * TILE_SIZE;
tileCenterX = tileNW_X - TILE_SIZE * 0.5f;
tileCenterY = tileNW_Y - TILE_SIZE * 0.5f;
}
float maxDist = TILE_SIZE * 0.45f; // island radius slightly smaller than tile
for (int ci = 0; ci < 256; ci++) {
auto& chunk = terrain_->chunks[ci];
if (!chunk.hasHeightMap()) continue;
for (int v = 0; v < 145; v++) {
glm::vec3 pos = chunkVertexWorldPos(ci, v);
float dist = glm::length(glm::vec2(pos.x - tileCenterX, pos.y - tileCenterY));
float t = std::clamp(dist / maxDist, 0.0f, 1.0f);
// Smooth island falloff: high center, gradual drop, steep beach
float islandH;
if (t < 0.6f) {
islandH = centerHeight; // flat interior
} else if (t < 0.85f) {
float beachT = (t - 0.6f) / 0.25f;
islandH = centerHeight * (1.0f - beachT * beachT);
} else {
float dropT = (t - 0.85f) / 0.15f;
islandH = centerHeight * (1.0f - 0.85f * 0.85f) * (1.0f - dropT) - edgeDropoff * dropT;
}
chunk.heightMap.heights[v] = islandH + chunk.heightMap.heights[v] * 0.3f;
}
dirtyChunks_.push_back(ci);
}
for (int ci = 0; ci < 256; ci++) stitchEdges(ci);
dirty_ = true;
commitGeneratorUndo();
}
void TerrainEditor::createRidge(const glm::vec3& start, const glm::vec3& end,
float width, float height) {
if (!terrain_) return;
recordGeneratorUndo();
glm::vec2 lineStart(start.x, start.y);
glm::vec2 lineEnd(end.x, end.y);
glm::vec2 lineDir = glm::normalize(lineEnd - lineStart);
float lineLen = glm::length(lineEnd - lineStart);
for (int ci = 0; ci < 256; ci++) {
auto& chunk = terrain_->chunks[ci];
if (!chunk.hasHeightMap()) continue;
bool modified = false;
for (int v = 0; v < 145; v++) {
glm::vec3 pos = chunkVertexWorldPos(ci, v);
glm::vec2 p(pos.x, pos.y);
glm::vec2 toP = p - lineStart;
float along = glm::dot(toP, lineDir);
along = std::clamp(along, 0.0f, lineLen);
glm::vec2 closest = lineStart + lineDir * along;
float dist = glm::length(p - closest);
if (dist >= width) continue;
float crossFalloff = 1.0f - (dist / width);
crossFalloff = crossFalloff * crossFalloff;
float alongFalloff = 1.0f - 2.0f * std::abs(along / lineLen - 0.5f);
alongFalloff = std::max(0.0f, alongFalloff);
float h = height * crossFalloff * std::sqrt(alongFalloff);
chunk.heightMap.heights[v] += h;
modified = true;
}
if (modified) { stitchEdges(ci); dirtyChunks_.push_back(ci); }
}
dirty_ = true;
commitGeneratorUndo();
}
void TerrainEditor::flattenRoad(const glm::vec3& start, const glm::vec3& end, float width) {
if (!terrain_) return;
recordGeneratorUndo();
glm::vec2 lineStart(start.x, start.y);
glm::vec2 lineEnd(end.x, end.y);
glm::vec2 lineDir = glm::normalize(lineEnd - lineStart);
float lineLen = glm::length(lineEnd - lineStart);
// Interpolate height along the path
auto heightAtT = [&](float t) -> float {
return start.z + (end.z - start.z) * (t / lineLen);
};
for (int ci = 0; ci < 256; ci++) {
auto& chunk = terrain_->chunks[ci];
if (!chunk.hasHeightMap()) continue;
bool modified = false;
for (int v = 0; v < 145; v++) {
glm::vec3 pos = chunkVertexWorldPos(ci, v);
glm::vec2 p(pos.x, pos.y);
glm::vec2 toP = p - lineStart;
float t = glm::dot(toP, lineDir);
t = std::clamp(t, 0.0f, lineLen);
glm::vec2 closest = lineStart + lineDir * t;
float dist = glm::length(p - closest);
if (dist < width) {
float targetH = heightAtT(t);
float relTarget = targetH - chunk.position[2];
float falloff = 1.0f - (dist / width);
falloff = falloff * falloff;
float h = chunk.heightMap.heights[v];
chunk.heightMap.heights[v] = h + (relTarget - h) * falloff;
modified = true;
}
}
if (modified) {
stitchEdges(ci);
dirtyChunks_.push_back(ci);
}
}
dirty_ = true;
commitGeneratorUndo();
}
void TerrainEditor::copyStamp(const glm::vec3& center, float radius) {
if (!terrain_) return;
stampData_.clear();
stampCenter_ = center;
for (int ci = 0; ci < 256; ci++) {
if (!terrain_->chunks[ci].hasHeightMap()) continue;
for (int v = 0; v < 145; v++) {
glm::vec3 pos = chunkVertexWorldPos(ci, v);
float dx = pos.x - center.x;
float dy = pos.y - center.y;
if (std::sqrt(dx * dx + dy * dy) <= radius) {
StampVertex sv;
sv.dx = dx;
sv.dy = dy;
sv.height = terrain_->chunks[ci].heightMap.heights[v];
stampData_.push_back(sv);
}
}
}
LOG_INFO("Stamp copied: ", stampData_.size(), " vertices in radius ", radius);
}
void TerrainEditor::pasteStamp(const glm::vec3& center) {
if (!terrain_ || stampData_.empty()) return;
for (const auto& sv : stampData_) {
float wx = center.x + sv.dx;
float wy = center.y + sv.dy;
// Find nearest vertex and set its height
float bestDist = 1e30f;
int bestChunk = -1, bestVert = -1;
for (int ci = 0; ci < 256; ci++) {
if (!terrain_->chunks[ci].hasHeightMap()) continue;
for (int v = 0; v < 145; v++) {
glm::vec3 pos = chunkVertexWorldPos(ci, v);
float d = std::sqrt((pos.x - wx) * (pos.x - wx) + (pos.y - wy) * (pos.y - wy));
if (d < bestDist && d < 3.0f) {
bestDist = d;
bestChunk = ci;
bestVert = v;
}
}
}
if (bestChunk >= 0) {
terrain_->chunks[bestChunk].heightMap.heights[bestVert] = sv.height;
if (std::find(dirtyChunks_.begin(), dirtyChunks_.end(), bestChunk) == dirtyChunks_.end())
dirtyChunks_.push_back(bestChunk);
}
}
for (int ci : dirtyChunks_) stitchEdges(ci);
dirty_ = true;
LOG_INFO("Stamp pasted at (", center.x, ",", center.y, ")");
}
void TerrainEditor::clampHeights(float minH, float maxH) {
if (!terrain_) return;
for (int ci = 0; ci < 256; ci++) {
auto& chunk = terrain_->chunks[ci];
if (!chunk.hasHeightMap()) continue;
bool modified = false;
for (int v = 0; v < 145; v++) {
float absH = chunk.position[2] + chunk.heightMap.heights[v];
if (absH < minH) {
chunk.heightMap.heights[v] = minH - chunk.position[2];
modified = true;
} else if (absH > maxH) {
chunk.heightMap.heights[v] = maxH - chunk.position[2];
modified = true;
}
}
if (modified) dirtyChunks_.push_back(ci);
}
dirty_ = true;
}
void TerrainEditor::applyErode(float dt) {
float factor = std::min(1.0f, brush_.settings().strength * dt * 0.3f);
auto affected = getAffectedChunks(brush_.getPosition(), brush_.settings().radius);
for (int chunkIdx : affected) {
bool modified = false;
auto& chunk = terrain_->chunks[chunkIdx];
for (int v = 0; v < 145; v++) {
glm::vec3 pos = chunkVertexWorldPos(chunkIdx, v);
float dist = glm::length(glm::vec2(pos.x - brush_.getPosition().x,
pos.y - brush_.getPosition().y));
float influence = brush_.getInfluence(dist);
if (influence <= 0.0f) continue;
float h = chunk.heightMap.heights[v];
int col = v % 17;
// Find lowest neighbor (same chunk)
float lowestH = h;
if (col <= 8) {
int neighbors[] = {v - 17, v + 17, v - 1, v + 1};
for (int n : neighbors) {
if (n >= 0 && n < 145)
lowestH = std::min(lowestH, chunk.heightMap.heights[n]);
}
}
// Move height toward lowest neighbor (erosion)
float slope = h - lowestH;
if (slope > 0.1f) {
float erosion = slope * factor * influence * 0.3f;
chunk.heightMap.heights[v] -= erosion;
modified = true;
}
}
if (modified) {
stitchEdges(chunkIdx);
if (std::find(dirtyChunks_.begin(), dirtyChunks_.end(), chunkIdx) == dirtyChunks_.end())
dirtyChunks_.push_back(chunkIdx);
dirty_ = true;
}
}
}
void TerrainEditor::applyNoise(float frequency, float amplitude, int octaves, uint32_t seed) {
recordGeneratorUndo();
if (!terrain_) return;
// Simple value noise with octaves
auto hash2d = [](int x, int y, uint32_t s) -> float {
uint32_t h = static_cast<uint32_t>(x * 374761393 + y * 668265263 + s * 1274126177);
h = (h ^ (h >> 13)) * 1274126177;
h = h ^ (h >> 16);
return static_cast<float>(h & 0xFFFF) / 65535.0f * 2.0f - 1.0f;
};
auto smoothNoise = [&](float fx, float fy, uint32_t s) -> float {
int ix = static_cast<int>(std::floor(fx));
int iy = static_cast<int>(std::floor(fy));
float fracX = fx - ix;
float fracY = fy - iy;
// Smoothstep
fracX = fracX * fracX * (3.0f - 2.0f * fracX);
fracY = fracY * fracY * (3.0f - 2.0f * fracY);
float v00 = hash2d(ix, iy, s);
float v10 = hash2d(ix + 1, iy, s);
float v01 = hash2d(ix, iy + 1, s);
float v11 = hash2d(ix + 1, iy + 1, s);
float i0 = v00 + (v10 - v00) * fracX;
float i1 = v01 + (v11 - v01) * fracX;
return i0 + (i1 - i0) * fracY;
};
for (int ci = 0; ci < 256; ci++) {
auto& chunk = terrain_->chunks[ci];
if (!chunk.hasHeightMap()) continue;
for (int v = 0; v < 145; v++) {
glm::vec3 wpos = chunkVertexWorldPos(ci, v);
float total = 0.0f;
float amp = amplitude;
float freq = frequency;
for (int o = 0; o < octaves; o++) {
total += smoothNoise(wpos.x * freq, wpos.y * freq, seed + o * 97) * amp;
freq *= 2.0f;
amp *= 0.5f;
}
chunk.heightMap.heights[v] += total;
}
dirtyChunks_.push_back(ci);
}
dirty_ = true;
commitGeneratorUndo();
}
bool TerrainEditor::importHeightmap(const std::string& path, float heightScale) {
if (!terrain_) return false;
std::ifstream f(path, std::ios::binary | std::ios::ate);
if (!f) { return false; }
auto fileSize = f.tellg();
f.seekg(0);
// Determine resolution from file size
// 129x129 x 2 bytes = 33282 (one chunk row+1 per tile row+1)
// 257x257 x 2 bytes = 132098 (2 samples per chunk quad)
int res = 0;
if (fileSize >= 132098) res = 257;
else if (fileSize >= 33282) res = 129;
else if (fileSize >= 16641) { res = 129; } // 8-bit 129x129
else return false;
bool is16bit = (fileSize >= res * res * 2);
std::vector<float> heightData(res * res);
if (is16bit) {
std::vector<uint16_t> raw(res * res);
f.read(reinterpret_cast<char*>(raw.data()), res * res * 2);
for (int i = 0; i < res * res; i++)
heightData[i] = static_cast<float>(raw[i]) / 65535.0f;
} else {
std::vector<uint8_t> raw(res * res);
f.read(reinterpret_cast<char*>(raw.data()), res * res);
for (int i = 0; i < res * res; i++)
heightData[i] = static_cast<float>(raw[i]) / 255.0f;
}
// Map heightmap pixels to terrain vertices
for (int cy = 0; cy < 16; cy++) {
for (int cx = 0; cx < 16; cx++) {
auto& chunk = terrain_->chunks[cy * 16 + cx];
if (!chunk.hasHeightMap()) continue;
for (int v = 0; v < 145; v++) {
int row = v / 17, col = v % 17;
float offX = static_cast<float>(col);
float offY = static_cast<float>(row);
if (col > 8) { offY += 0.5f; offX -= 8.5f; }
// Map to pixel coords
float px = (cx * 8.0f + offX) / 128.0f * (res - 1);
float py = (cy * 8.0f + offY) / 128.0f * (res - 1);
int ix = std::clamp(static_cast<int>(px), 0, res - 1);
int iy = std::clamp(static_cast<int>(py), 0, res - 1);
chunk.heightMap.heights[v] = heightData[iy * res + ix] * heightScale;
}
dirtyChunks_.push_back(cy * 16 + cx);
}
}
dirty_ = true;
return true;
}
bool TerrainEditor::exportHeightmap(const std::string& path, float heightScale) {
if (!terrain_) return false;
constexpr int res = 129;
std::vector<uint16_t> data(res * res, 0);
for (int cy = 0; cy < 16; cy++) {
for (int cx = 0; cx < 16; cx++) {
auto& chunk = terrain_->chunks[cy * 16 + cx];
if (!chunk.hasHeightMap()) continue;
for (int v = 0; v < 145; v++) {
int row = v / 17, col = v % 17;
if (col > 8) continue; // outer vertices only for 129x129
int px = cx * 8 + col;
int py = cy * 8 + row;
if (px >= res || py >= res) continue;
float h = (chunk.position[2] + chunk.heightMap.heights[v]) / heightScale;
h = std::clamp(h, 0.0f, 1.0f);
data[py * res + px] = static_cast<uint16_t>(h * 65535.0f);
}
}
}
std::ofstream f(path, std::ios::binary);
if (!f) return false;
f.write(reinterpret_cast<const char*>(data.data()), data.size() * 2);
return true;
}
void TerrainEditor::punchHole(const glm::vec3& center, float radius) {
if (!terrain_) return;
auto affected = getAffectedChunks(center, radius);
for (int ci : affected) {
auto& chunk = terrain_->chunks[ci];
// Each chunk has 8x8 quads, holes use a 4x4 bitmask (each bit covers 2x2 quads)
for (int hy = 0; hy < 4; hy++) {
for (int hx = 0; hx < 4; hx++) {
// Center of this 2x2 quad group
int cx = ci % 16, cy = ci / 16;
float tileNW_X = (32.0f - static_cast<float>(terrain_->coord.y)) * TILE_SIZE;
float tileNW_Y = (32.0f - static_cast<float>(terrain_->coord.x)) * TILE_SIZE;
float qx = tileNW_X - cy * CHUNK_SIZE - (hy * 2 + 1) * CHUNK_SIZE / 8.0f;
float qy = tileNW_Y - cx * CHUNK_SIZE - (hx * 2 + 1) * CHUNK_SIZE / 8.0f;
float dist = std::sqrt((qx - center.x) * (qx - center.x) +
(qy - center.y) * (qy - center.y));
if (dist < radius) {
int bit = 1 << (hy * 4 + hx);
chunk.holes |= static_cast<uint16_t>(bit);
}
}
}
if (std::find(dirtyChunks_.begin(), dirtyChunks_.end(), ci) == dirtyChunks_.end())
dirtyChunks_.push_back(ci);
dirty_ = true;
}
}
void TerrainEditor::fillHole(const glm::vec3& center, float radius) {
if (!terrain_) return;
auto affected = getAffectedChunks(center, radius);
for (int ci : affected) {
auto& chunk = terrain_->chunks[ci];
for (int hy = 0; hy < 4; hy++) {
for (int hx = 0; hx < 4; hx++) {
int cx = ci % 16, cy = ci / 16;
float tileNW_X = (32.0f - static_cast<float>(terrain_->coord.y)) * TILE_SIZE;
float tileNW_Y = (32.0f - static_cast<float>(terrain_->coord.x)) * TILE_SIZE;
float qx = tileNW_X - cy * CHUNK_SIZE - (hy * 2 + 1) * CHUNK_SIZE / 8.0f;
float qy = tileNW_Y - cx * CHUNK_SIZE - (hx * 2 + 1) * CHUNK_SIZE / 8.0f;
float dist = std::sqrt((qx - center.x) * (qx - center.x) +
(qy - center.y) * (qy - center.y));
if (dist < radius) {
int bit = 1 << (hy * 4 + hx);
chunk.holes &= ~static_cast<uint16_t>(bit);
}
}
}
if (std::find(dirtyChunks_.begin(), dirtyChunks_.end(), ci) == dirtyChunks_.end())
dirtyChunks_.push_back(ci);
dirty_ = true;
}
}
} // namespace editor
} // namespace wowee
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