d3dx8: Implement D3DXMatrixPerspectiveOffCenterRH.

dlls/d3dx8/d3dx8.spec

@@ -40,7 +40,7 @@
 @ stdcall D3DXMatrixPerspectiveLH(ptr long long long long)
 @ stdcall D3DXMatrixPerspectiveFovRH(ptr long long long long)
 @ stdcall D3DXMatrixPerspectiveFovLH(ptr long long long long)
-@ stub D3DXMatrixPerspectiveOffCenterRH
+@ stdcall D3DXMatrixPerspectiveOffCenterRH(ptr long long long long long long)
 @ stub D3DXMatrixPerspectiveOffCenterLH
 @ stub D3DXMatrixOrthoRH
 @ stub D3DXMatrixOrthoLH

dlls/d3dx8/math.c

@@ -152,6 +152,20 @@ D3DXMATRIX* WINAPI D3DXMatrixPerspectiveLH(D3DXMATRIX *pout, FLOAT w, FLOAT h, F
     return pout;
 }
 
+D3DXMATRIX* WINAPI D3DXMatrixPerspectiveOffCenterRH(D3DXMATRIX *pout, FLOAT l, FLOAT r, FLOAT b, FLOAT t, FLOAT zn, FLOAT zf)
+{
+    D3DXMatrixIdentity(pout);
+    pout->m[0][0] = 2.0f * zn / (r - l);
+    pout->m[1][1] = -2.0f * zn / (b - t);
+    pout->m[2][0] = 1.0f + 2.0f * l / (r - l);
+    pout->m[2][1] = -1.0f -2.0f * t / (b - t);
+    pout->m[2][2] = zf / (zn - zf);
+    pout->m[3][2] = (zn * zf) / (zn -zf);
+    pout->m[2][3] = -1.0f;
+    pout->m[3][3] = 0.0f;
+    return pout;
+}
+
 D3DXMATRIX* WINAPI D3DXMatrixPerspectiveRH(D3DXMATRIX *pout, FLOAT w, FLOAT h, FLOAT zn, FLOAT zf)
 {
     D3DXMatrixIdentity(pout);

dlls/d3dx8/tests/math.c

@@ -239,13 +239,21 @@ static void D3DXMatrixTest(void)
     expect_mat(expectedmat,gotmat);
 
 /*____________D3DXMatrixPerspectiveLH_______________*/
-    expectedmat.m[0][0] = -24.0f; expectedmat.m[0][1] = -0.0f; expectedmat.m[0][2] = 0.0f; expectedmat.m[0][3] = 0.0f;
+    expectedmat.m[0][0] = -24.0f; expectedmat.m[0][1] = 0.0f; expectedmat.m[0][2] = 0.0f; expectedmat.m[0][3] = 0.0f;
     expectedmat.m[1][0] = 0.0f; expectedmat.m[1][1] = -6.4f; expectedmat.m[1][2] = 0.0; expectedmat.m[1][3] = 0.0f;
     expectedmat.m[2][0] = 0.0f; expectedmat.m[2][1] = 0.0f; expectedmat.m[2][2] = 0.783784f; expectedmat.m[2][3] = 1.0f;
     expectedmat.m[3][0] = 0.0f; expectedmat.m[3][1] = 0.0f; expectedmat.m[3][2] = 1.881081f; expectedmat.m[3][3] = 0.0f;
     D3DXMatrixPerspectiveLH(&gotmat, 0.2f, 0.75f, -2.4f, 8.7f);
     expect_mat(expectedmat,gotmat);
 
+/*____________D3DXMatrixPerspectiveOffCenterRH_______________*/
+    expectedmat.m[0][0] = 11.636364f; expectedmat.m[0][1] = 0.0f; expectedmat.m[0][2] = 0.0f; expectedmat.m[0][3] = 0.0f;
+    expectedmat.m[1][0] = 0.0f; expectedmat.m[1][1] = 0.576577f; expectedmat.m[1][2] = 0.0; expectedmat.m[1][3] = 0.0f;
+    expectedmat.m[2][0] = 1.727273f; expectedmat.m[2][1] = 0.567568f; expectedmat.m[2][2] = -0.840796f; expectedmat.m[2][3] = -1.0f;
+    expectedmat.m[3][0] = 0.0f; expectedmat.m[3][1] = 0.0f; expectedmat.m[3][2] = -2.690547f; expectedmat.m[3][3] = 0.0f;
+    D3DXMatrixPerspectiveOffCenterRH(&gotmat, 0.2f, 0.75f, -2.4f, 8.7f, 3.2f, -16.9f);
+    expect_mat(expectedmat,gotmat);
+
 /*____________D3DXMatrixPerspectiveRH_______________*/
     expectedmat.m[0][0] = -24.0f; expectedmat.m[0][1] = -0.0f; expectedmat.m[0][2] = 0.0f; expectedmat.m[0][3] = 0.0f;
     expectedmat.m[1][0] = 0.0f; expectedmat.m[1][1] = -6.4f; expectedmat.m[1][2] = 0.0; expectedmat.m[1][3] = 0.0f;

include/d3dx8math.h

@@ -65,6 +65,7 @@ D3DXMATRIX* WINAPI D3DXMatrixMultiply(D3DXMATRIX *pout, CONST D3DXMATRIX *pm1, C
 D3DXMATRIX* WINAPI D3DXMatrixPerspectiveFovLH(D3DXMATRIX *pout, FLOAT fovy, FLOAT aspect, FLOAT zn, FLOAT zf);
 D3DXMATRIX* WINAPI D3DXMatrixPerspectiveFovRH(D3DXMATRIX *pout, FLOAT fovy, FLOAT aspect, FLOAT zn, FLOAT zf);
 D3DXMATRIX* WINAPI D3DXMatrixPerspectiveLH(D3DXMATRIX *pout, FLOAT w, FLOAT h, FLOAT zn, FLOAT zf);
+D3DXMATRIX* WINAPI D3DXMatrixPerspectiveOffCenterRH(D3DXMATRIX *pout, FLOAT l, FLOAT r, FLOAT b, FLOAT t, FLOAT zn, FLOAT zf);
 D3DXMATRIX* WINAPI D3DXMatrixPerspectiveRH(D3DXMATRIX *pout, FLOAT w, FLOAT h, FLOAT zn, FLOAT zf);
 D3DXMATRIX* WINAPI D3DXMatrixRotationAxis(D3DXMATRIX *pout, CONST D3DXVECTOR3 *pv, FLOAT angle);
 D3DXMATRIX* WINAPI D3DXMatrixRotationQuaternion(D3DXMATRIX *pout, CONST D3DXQUATERNION *pq);