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feat(woc): add WMO collision meshes to exported zone collision

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WoweeCollision previously only contained terrain triangles; placed WMO
buildings had no collision in the exported zone, so players could walk
through walls. Added WoweeCollisionBuilder::addMesh() that transforms a
local-space mesh into world space with slope-based walkability flags,
and the editor's exportZone now walks every placed WMO and feeds each
group's geometry through it. Indoor vs outdoor groups are tagged via
the WMO group flag.
This commit is contained in:
Kelsi 2026-05-06 02:33:22 -07:00
parent fdd527b373
commit eadb6a5886
3 changed files with 83 additions and 1 deletions
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35
src/pipeline/wowee_collision.cpp
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@ -113,6 +113,41 @@ WoweeCollision WoweeCollisionBuilder::fromTerrain(const ADTTerrain& terrain,
return col;
}
void WoweeCollisionBuilder::addMesh(WoweeCollision& collision,
const std::vector<glm::vec3>& vertices,
const std::vector<uint32_t>& indices,
const glm::mat4& transform,
uint8_t extraFlags,
float steepAngle) {
if (vertices.empty() || indices.size() < 3) return;
const float steepCos = std::cos(glm::radians(steepAngle));
collision.triangles.reserve(collision.triangles.size() + indices.size() / 3);
for (size_t i = 0; i + 2 < indices.size(); i += 3) {
uint32_t i0 = indices[i], i1 = indices[i + 1], i2 = indices[i + 2];
if (i0 >= vertices.size() || i1 >= vertices.size() || i2 >= vertices.size()) continue;
WoweeCollision::Triangle tri;
tri.v0 = glm::vec3(transform * glm::vec4(vertices[i0], 1.0f));
tri.v1 = glm::vec3(transform * glm::vec4(vertices[i1], 1.0f));
tri.v2 = glm::vec3(transform * glm::vec4(vertices[i2], 1.0f));
glm::vec3 n = glm::cross(tri.v1 - tri.v0, tri.v2 - tri.v0);
float len = glm::length(n);
tri.flags = extraFlags;
if (len > 1e-6f) {
float nz = n.z / len;
if (nz >= steepCos) tri.flags |= 0x01; // walkable
else if (nz < 0.0f) tri.flags |= 0x04; // steep / facing-down
}
collision.bounds.expand(tri.v0);
collision.bounds.expand(tri.v1);
collision.bounds.expand(tri.v2);
collision.triangles.push_back(tri);
}
}
bool WoweeCollisionBuilder::save(const WoweeCollision& collision, const std::string& path) {
namespace fs = std::filesystem;
fs::create_directories(fs::path(path).parent_path());