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port/common: platform-independent D3DX8 math layer

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D3DXVECTOR2/3/4, D3DXMATRIX, D3DXQUATERNION, D3DXPLANE, D3DXCOLOR with
d3dx8math.inl operator semantics, plus the D3DX* functions the 2V3 slice
logic uses. Covered by port.common; port_gate passes on macOS, Android,
iOS and Windows (mingw).

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
shenlei
2026-09-22 20:02:15 +09:00
co-authored by Claude Opus 5
parent 2bae8d7644
commit 0f2eee0b24
4 changed files with 775 additions and 1 deletions
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extension/tests/port_common_test.cpp
+49
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@@ -1,6 +1,8 @@
// port/common: Win32 widths and MSVC CRT semantics the ported 40250 logic relies on.
#include "common/StdAfx.h"
#include "common/D3DXMath.h"
#include <cmath>
#include <cstdio>
#include <cstdlib>
@@ -48,6 +50,53 @@ int main()
const DWORD b = timeGetTime();
CHECK(static_cast<DWORD>(b - a) < 1000);
// D3DX8 math: row vectors, left-handed rotations, D3DX multiply order.
const auto near = [](float x, float y) { return std::fabs(x - y) < 1e-5f; };
D3DXVECTOR3 v(3.0f, 0.0f, 4.0f);
CHECK(D3DXVec3Length(&v) == 5.0f && D3DXVec3LengthSq(&v) == 25.0f);
D3DXVECTOR3 n;
D3DXVec3Normalize(&n, &v);
CHECK(near(n.x, 0.6f) && n.y == 0.0f && near(n.z, 0.8f));
D3DXVECTOR3 zero(0.0f, 0.0f, 0.0f);
D3DXVec3Normalize(&n, &zero);
CHECK(n == zero);
CHECK((v / 2.0f) == D3DXVECTOR3(1.5f, 0.0f, 2.0f) && (2.0f * v) == D3DXVECTOR3(6.0f, 0.0f, 8.0f));
CHECK(near(D3DXToRadian(180.0f), D3DX_PI) && near(D3DXToDegree(D3DX_PI / 2.0f), 90.0f));
D3DXMATRIX rz, tr, m;
D3DXMatrixRotationZ(&rz, D3DX_PI / 2.0f); // x axis -> +y
D3DXVECTOR3 p(1.0f, 0.0f, 0.0f), q;
D3DXVec3TransformCoord(&q, &p, &rz);
CHECK(near(q.x, 0.0f) && near(q.y, 1.0f) && near(q.z, 0.0f));
D3DXMatrixTranslation(&tr, 10.0f, 20.0f, 30.0f);
m = rz * tr; // rotate, then translate
D3DXVec3TransformCoord(&q, &p, &m);
CHECK(near(q.x, 10.0f) && near(q.y, 21.0f) && near(q.z, 30.0f));
D3DXMATRIX inv, id;
CHECK(D3DXMatrixInverse(&inv, nullptr, &m) != nullptr);
D3DXMatrixMultiply(&id, &m, &inv);
for (int i = 0; i < 4; ++i)
for (int j = 0; j < 4; ++j)
CHECK(near(id.m[i][j], i == j ? 1.0f : 0.0f));
D3DXQUATERNION qz;
D3DXVECTOR3 zAxis(0.0f, 0.0f, 1.0f);
D3DXQuaternionRotationAxis(&qz, &zAxis, D3DX_PI / 2.0f);
D3DXMATRIX mq;
D3DXMatrixRotationQuaternion(&mq, &qz);
for (int i = 0; i < 16; ++i)
CHECK(near((&mq._11)[i], (&rz._11)[i]));
D3DXMATRIX ypr, ypr2;
D3DXQUATERNION qypr;
D3DXMatrixRotationYawPitchRoll(&ypr, 0.3f, 0.5f, 0.7f);
D3DXQuaternionRotationYawPitchRoll(&qypr, 0.3f, 0.5f, 0.7f);
D3DXMatrixRotationQuaternion(&ypr2, &qypr);
for (int i = 0; i < 16; ++i)
CHECK(near((&ypr._11)[i], (&ypr2._11)[i]));
CHECK(static_cast<DWORD>(D3DXCOLOR(0xFF804020u)) == 0xFF804020u);
CHECK(static_cast<DWORD>(D3DXCOLOR(2.0f, -1.0f, 0.5f, 1.0f)) == 0xFFFF0080u);
if (g_failures)
return EXIT_FAILURE;
std::puts("port_common_test: ok");