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feat(editor): biome vegetation auto-population system
One-click procedural object placement based on biome rules: - 10 biome vegetation rulesets with density, scale range, and slope constraints per asset type (trees, bushes, rocks, ferns, etc.) - Grassland: pine trees + bushes + rocks - Forest: ashenvale trees + ferns + forest rocks (dense canopy) - Jungle: palm trees + ferns + vines (high density) - Desert: cacti + desert rocks + bones (sparse) - Barrens: scattered trees + dry bushes + rocks - Snow: snow pines + snowdrifts + rocks - Swamp: dark trees + mushrooms + logs - Rocky: rock formations + rock piles - Beach: palm trees + beach rocks - Volcanic: lava rocks + charred trees Objects panel > Auto-Populate Biome: select biome, set seed, click "Populate Zone" to fill the entire tile with biome-appropriate vegetation at rule-defined densities.
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Kelsi
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4 changed files with 143 additions and 0 deletions
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@ -1668,6 +1668,34 @@ void EditorUI::renderObjectPanel(EditorApp& app) {
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}
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}
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if (ImGui::CollapsingHeader("Auto-Populate Biome")) {
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static int popBiome = 0;
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static uint32_t popSeed = 42;
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const char* biomeNames[] = {"Grassland", "Forest", "Jungle", "Desert",
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"Barrens", "Snow", "Swamp", "Rocky", "Beach", "Volcanic"};
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ImGui::Combo("Biome##pop", &popBiome, biomeNames, 10);
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int seed = static_cast<int>(popSeed);
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if (ImGui::InputInt("Seed##pop", &seed)) popSeed = static_cast<uint32_t>(seed);
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auto veg = getBiomeVegetation(static_cast<Biome>(popBiome));
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ImGui::TextColored(ImVec4(0.6f,0.6f,0.6f,1), "%zu asset types, density-based",
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veg.assets.size());
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if (ImGui::Button("Populate Zone", ImVec2(-1, 0)) && app.hasTerrainLoaded()) {
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auto* t = app.getTerrainEditor().getTerrain();
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float tileSize = 533.33333f;
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glm::vec3 origin(
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(32.0f - t->coord.y) * tileSize,
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(32.0f - t->coord.x) * tileSize, 0);
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int n = placer.populateBiome(veg, tileSize, origin, popSeed);
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app.markObjectsDirty();
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app.showToast("Populated " + std::string(biomeNames[popBiome]) +
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": " + std::to_string(n) + " objects");
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}
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if (ImGui::IsItemHovered())
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ImGui::SetTooltip("Auto-place trees, rocks, bushes based on biome rules");
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}
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ImGui::Separator();
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// Bulk operations
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if (ImGui::CollapsingHeader("Bulk Operations")) {
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@ -1,4 +1,5 @@
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#include "object_placer.hpp"
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#include "terrain_biomes.hpp"
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#include "core/logger.hpp"
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#include <nlohmann/json.hpp>
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#include <algorithm>
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@ -199,6 +200,45 @@ void ObjectPlacer::scatter(const glm::vec3& center, float radius, int count,
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LOG_INFO("Scattered ", count, " objects in radius ", radius);
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}
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int ObjectPlacer::populateBiome(const BiomeVegetation& vegetation,
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float tileSize, const glm::vec3& tileOrigin,
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uint32_t seed) {
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int placed = 0;
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std::mt19937 rng(seed);
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std::uniform_real_distribution<float> distPos(0.0f, 1.0f);
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std::uniform_real_distribution<float> distRot(0.0f, 360.0f);
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for (const auto& asset : vegetation.assets) {
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// Calculate object count from density (per 100x100 area)
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float areaFactor = (tileSize * tileSize) / 10000.0f;
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int count = static_cast<int>(asset.density * areaFactor);
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std::uniform_real_distribution<float> distScale(asset.minScale, asset.maxScale);
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for (int i = 0; i < count; i++) {
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float u = distPos(rng);
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float v = distPos(rng);
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glm::vec3 pos = tileOrigin + glm::vec3(
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-u * tileSize, -v * tileSize, 0.0f);
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PlacedObject obj;
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obj.type = PlaceableType::M2;
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obj.path = asset.path;
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obj.nameId = 0;
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obj.uniqueId = nextUniqueId();
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obj.position = pos;
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obj.rotation = glm::vec3(0.0f, distRot(rng), 0.0f);
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obj.scale = distScale(rng);
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obj.selected = false;
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objects_.push_back(obj);
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placed++;
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}
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}
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LOG_INFO("Biome populated: ", vegetation.name, " — ", placed, " objects placed");
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return placed;
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}
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void ObjectPlacer::undoLastPlace() {
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if (undoStack_.empty()) return;
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int idx = undoStack_.back();
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@ -82,6 +82,11 @@ public:
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void scatter(const glm::vec3& center, float radius, int count,
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float minScale, float maxScale);
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// Procedural biome population: auto-place vegetation based on rules
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int populateBiome(const struct BiomeVegetation& vegetation,
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float tileSize, const glm::vec3& tileOrigin,
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uint32_t seed = 42);
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private:
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uint32_t nextUniqueId();
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@ -109,5 +109,75 @@ inline const char* getBiomeName(Biome b) {
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return getBiomeTextures(b).name;
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}
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// Vegetation rule: which M2 models to scatter per biome
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struct VegetationAsset {
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const char* path;
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float density; // objects per 100x100 unit area
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float minScale;
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float maxScale;
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float maxSlope; // max terrain slope (0-1, 0=flat only, 1=any)
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float minHeight; // relative to base (-999=any)
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float maxHeight; // relative to base (999=any)
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};
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struct BiomeVegetation {
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const char* name;
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std::vector<VegetationAsset> assets;
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};
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inline BiomeVegetation getBiomeVegetation(Biome biome) {
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switch (biome) {
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case Biome::Grassland: return {"Grassland", {
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{"World\\Doodad\\Azeroth\\Elwynn\\PineTree\\ElwynnPineTree01.m2", 3.0f, 0.8f, 1.4f, 0.6f, -999, 999},
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{"World\\Doodad\\Azeroth\\Elwynn\\ElwynnBush01.m2", 5.0f, 0.6f, 1.2f, 0.8f, -999, 999},
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{"World\\Doodad\\Azeroth\\Rock\\Rock01.m2", 1.0f, 0.5f, 1.5f, 1.0f, -999, 999},
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}};
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case Biome::Forest: return {"Forest", {
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{"World\\Doodad\\Azeroth\\Ashenvale\\AshenvaleTree01.m2", 6.0f, 0.7f, 1.5f, 0.5f, -999, 999},
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{"World\\Doodad\\Azeroth\\Ashenvale\\AshenvaleTree02.m2", 4.0f, 0.8f, 1.3f, 0.5f, -999, 999},
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{"World\\Doodad\\Azeroth\\Ashenvale\\AshenvaleFern01.m2", 8.0f, 0.4f, 0.9f, 0.7f, -999, 999},
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{"World\\Doodad\\Azeroth\\Rock\\ForestRock01.m2", 1.5f, 0.6f, 1.8f, 1.0f, -999, 999},
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}};
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case Biome::Jungle: return {"Jungle", {
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{"World\\Doodad\\Azeroth\\Stranglethorn\\StranglethornPalmTree01.m2", 5.0f, 0.8f, 1.4f, 0.5f, -999, 999},
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{"World\\Doodad\\Azeroth\\Stranglethorn\\StranglethornFern01.m2", 10.0f, 0.3f, 0.8f, 0.8f, -999, 999},
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{"World\\Doodad\\Azeroth\\Stranglethorn\\StranglethornVines01.m2", 3.0f, 0.7f, 1.2f, 0.6f, -999, 999},
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}};
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case Biome::Desert: return {"Desert", {
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{"World\\Doodad\\Azeroth\\Tanaris\\TanarisCactus01.m2", 2.0f, 0.6f, 1.3f, 0.7f, -999, 999},
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{"World\\Doodad\\Azeroth\\Rock\\DesertRock01.m2", 1.5f, 0.5f, 2.0f, 1.0f, -999, 999},
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{"World\\Doodad\\Azeroth\\Tanaris\\TanarisBones01.m2", 0.5f, 0.8f, 1.2f, 0.5f, -999, 999},
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}};
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case Biome::Barrens: return {"Barrens", {
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{"World\\Doodad\\Azeroth\\Barrens\\BarrensTree01.m2", 1.5f, 0.7f, 1.3f, 0.6f, -999, 999},
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{"World\\Doodad\\Azeroth\\Barrens\\BarrensBush01.m2", 3.0f, 0.5f, 1.0f, 0.8f, -999, 999},
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{"World\\Doodad\\Azeroth\\Rock\\BarrensRock01.m2", 1.0f, 0.6f, 1.5f, 1.0f, -999, 999},
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}};
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case Biome::Snow: return {"Snow", {
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{"World\\Doodad\\Azeroth\\Winterspring\\WinterspringPine01.m2", 4.0f, 0.8f, 1.5f, 0.5f, -999, 999},
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{"World\\Doodad\\Azeroth\\Winterspring\\WinterspringSnowDrift01.m2", 2.0f, 0.5f, 1.2f, 0.4f, -999, 999},
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{"World\\Doodad\\Azeroth\\Rock\\SnowRock01.m2", 1.0f, 0.6f, 1.8f, 1.0f, -999, 999},
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}};
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case Biome::Swamp: return {"Swamp", {
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{"World\\Doodad\\Azeroth\\Wetlands\\WetlandsTree01.m2", 4.0f, 0.7f, 1.3f, 0.5f, -999, 999},
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{"World\\Doodad\\Azeroth\\Wetlands\\WetlandsMushroom01.m2", 6.0f, 0.3f, 0.7f, 0.8f, -999, 999},
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{"World\\Doodad\\Azeroth\\Wetlands\\WetlandsLog01.m2", 1.5f, 0.8f, 1.2f, 0.4f, -999, 999},
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}};
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case Biome::Rocky: return {"Rocky", {
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{"World\\Doodad\\Azeroth\\Rock\\Rock01.m2", 3.0f, 0.5f, 2.5f, 1.0f, -999, 999},
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{"World\\Doodad\\Azeroth\\Rock\\RockPile01.m2", 2.0f, 0.6f, 1.5f, 1.0f, -999, 999},
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}};
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case Biome::Beach: return {"Beach", {
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{"World\\Doodad\\Azeroth\\Stranglethorn\\StranglethornPalmTree01.m2", 2.0f, 0.7f, 1.3f, 0.4f, -999, 999},
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{"World\\Doodad\\Azeroth\\Rock\\BeachRock01.m2", 1.5f, 0.5f, 1.5f, 0.6f, -999, 999},
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}};
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case Biome::Volcanic: return {"Volcanic", {
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{"World\\Doodad\\Azeroth\\Rock\\LavaRock01.m2", 2.5f, 0.6f, 2.0f, 1.0f, -999, 999},
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{"World\\Doodad\\Azeroth\\Burning Steppes\\BurningSteppesCharredTree01.m2", 1.0f, 0.8f, 1.2f, 0.5f, -999, 999},
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}};
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default: return {"Unknown", {}};
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}
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}
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} // namespace editor
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} // namespace wowee
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