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feat(editor): terrain normal map export as PNG (129x129 RGB)

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Kelsi 2026-05-05 11:01:37 -07:00
parent a3b6653e15
commit 54b7949dd1
2 changed files with 38 additions and 0 deletions
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34
tools/editor/wowee_terrain.cpp
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@ -1,5 +1,6 @@
#include "wowee_terrain.hpp"
#include "core/logger.hpp"
#include "stb_image_write.h"
#include <fstream>
#include <filesystem>
#include <cstring>
@ -87,6 +88,39 @@ bool WoweeTerrain::exportOpen(const pipeline::ADTTerrain& terrain,
return true;
}
bool WoweeTerrain::exportNormalMap(const pipeline::ADTTerrain& terrain,
const std::string& path) {
// Export 129x129 normal map as RGB PNG
constexpr int res = 129;
std::vector<uint8_t> pixels(res * res * 3);
for (int cy = 0; cy < 16; cy++) {
for (int cx = 0; cx < 16; cx++) {
const 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;
int px = cx * 8 + col, py = cy * 8 + row;
if (px >= res || py >= res) continue;
int ni = v * 3;
float nx = static_cast<float>(chunk.normals[ni]) / 127.0f;
float ny = static_cast<float>(chunk.normals[ni + 1]) / 127.0f;
float nz = static_cast<float>(chunk.normals[ni + 2]) / 127.0f;
int idx = (py * res + px) * 3;
pixels[idx] = static_cast<uint8_t>((nx * 0.5f + 0.5f) * 255);
pixels[idx + 1] = static_cast<uint8_t>((ny * 0.5f + 0.5f) * 255);
pixels[idx + 2] = static_cast<uint8_t>((nz * 0.5f + 0.5f) * 255);
}
}
}
stbi_write_png(path.c_str(), res, res, 3, pixels.data(), res * 3);
return true;
}
bool WoweeTerrain::importOpen(const std::string& basePath, pipeline::ADTTerrain& terrain) {
std::string hmPath = basePath + ".whm";
std::ifstream f(hmPath, std::ios::binary);

4
tools/editor/wowee_terrain.hpp
View file

@ -14,6 +14,10 @@ public:
static bool exportOpen(const pipeline::ADTTerrain& terrain,
const std::string& basePath, int tileX, int tileY);
// Export normal map as PNG (129x129 RGB)
static bool exportNormalMap(const pipeline::ADTTerrain& terrain,
const std::string& path);
// Import terrain from open format back to ADTTerrain
static bool importOpen(const std::string& basePath, pipeline::ADTTerrain& terrain);
};