admin/omath
1
0
Fork 0
mirror of https://github.com/orange-cpp/omath.git synced 2026-02-13 07:03:25 +00:00
Code Issues Packages Projects Releases Wiki Activity

updated formulas

Browse Source
This commit is contained in:
Orange
2025-03-22 08:36:06 +03:00
parent 4f037a1952
commit 2b59fb6aa2
4 changed files with 36 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
source/engines/iw_engine/formulas.cpp
View File

@@ -26,22 +26,25 @@ namespace omath::iw_engine
return {vec.At(0, 0), vec.At(1, 0), vec.At(2, 0)};
}
Mat4x4 CalcViewMatrix(const ViewAngles& angles, const Vector3<float>& cam_origin)
{
return MatCameraView(ForwardVector(angles), RightVector(angles), UpVector(angles), cam_origin);
return MatCameraView(ForwardVector(angles), RightVector(angles), -UpVector(angles), cam_origin);
}
Mat4x4 CalcPerspectiveProjectionMatrix(const float fieldOfView, const float aspectRatio, const float near,
const float far)
{
// NOTE: Need magic number to fix fov calculation, since source inherit Quake proj matrix calculation
// NOTE: Need magic number to fix fov calculation, since IW engine inherit Quake proj matrix calculation
constexpr auto kMultiplyFactor = 0.75f;
const float fovHalfTan = std::tan(angles::DegreesToRadians(fieldOfView) / 2.f) * kMultiplyFactor;
return {
{1.f / (aspectRatio * fovHalfTan), 0, 0, 0},
{0, 1.f / fovHalfTan, 0, 0},
{0, 1.f / (fovHalfTan), 0, 0},
{0, 0, (far + near) / (far - near), -(2.f * far * near) / (far - near)},
{0, 0, 1, 0},
};
}
};
} // namespace omath::iw_engine