GwRoad_Z - widberg/fmtk GitHub Wiki
See also: Map
GenWorld Road
struct GwRoad_Z : ResourceObject_Z {
// thiscall 007DAAF0
// thiscall 008145A0
// thiscall 006CFEA0
// end thiscall
std::uint32_t roadCount;
Vec2f genRoadMin;
Vec2f genRoadMax;
struct Road {
std::uint8_t type;
PascalArray<struct Point {
std::int32_t a;
std::uint8_t b;
// see decode_vec2f_data below
}, std::uint16_t> points;
} roads[roadCount];
std::uint32_t unused5Count;
Vec2f unused5Min;
// (-1, -1)
Vec2f unused5Max;
// (1, 1)
struct Unused5 {
std::uint32_t unused0;
std::uint32_t unused1;
std::uint32_t unused2;
std::uint32_t unused3;
std::uint32_t unused4;
std::uint32_t unused5;
std::uint32_t unused6;
std::uint32_t unused7;
std::uint32_t unused8s[unused0 & 0xFFFF];
} unused5s[unused5Count];
crc32_t genWorldCRC32;
};Function to decode the encodedVec2fData, 2 packed 20-bit signed integers this takes 5 bytes which is 3 less than the 8 it would take to store 2 floats. Sign extend and divide by 4 to get the float value.
a b
01 23 45 67 89
\_____/\_____/
x y
Note the use of signed integers. This is important because the right shifts must be arithmetic for the bit hacks to work. p.b should not be sign extended.
Vec2f decode_vec2f_data(const Point p) {
std::int32_t a = _byteswap_ulong(p.a); // p.a should be big endian
std::int32_t x = a >> 12;
std::int32_t y = (((a << 20) >> 12) | p.b);
return Vec2f { x / 4.0, y / 4.0 };
}//------------------------------------------------
//--- 010 Editor v11.0.1 Binary Template
//------------------------------------------------
struct GwRoad_Z
{
uint32 roadCount;
float genRoadMin[2];
float genRoadMax[2];
struct Road
{
byte type;
uint16 pointCount;
struct Point
{
uint32 encodedVec2hf;
byte a;
} points[pointCount];
} roads[roadCount] <optimize=false>;
uint32 unknown5Count;
float unknown5Min[2];
float unknown5Max[2];
struct Unknown5
{
uint32 unknown0;
uint32 unknown1;
uint32 unknown2;
uint32 unknown3;
uint32 unknown4;
uint32 unknown5;
uint32 unknown6;
uint32 unknown7;
uint32 unknown8s[unknown0 & 0xFFFF];
} unknown5s[unknown5Count];
uint32 unknownCRC32;
} gwroad;