Vec3 bitangent = hfield_vertex(u, v + dv, calc_height(u, v + dv, ptr),
xsz, ysz, height) - vtx;
- Vec3 normal = normalize(cross(tangent, bitangent));
+ Vec3 normal = normalize(cross(bitangent, tangent));
mesh->vertices[vidx] = vtx;
mesh->normals[vidx] = normal;