d3dx8: Implement D3XMatrixVec3Project.

dlls/d3dx8/d3dx8.spec

@@ -12,7 +12,7 @@
 @ stdcall D3DXVec3Transform(ptr ptr ptr)
 @ stdcall D3DXVec3TransformCoord(ptr ptr ptr)
 @ stdcall D3DXVec3TransformNormal(ptr ptr ptr)
-@ stub D3DXVec3Project
+@ stdcall D3DXVec3Project(ptr ptr ptr ptr ptr ptr)
 @ stub D3DXVec3Unproject
 @ stdcall D3DXVec4Cross(ptr ptr ptr ptr)
 @ stdcall D3DXVec4Normalize(ptr ptr)

dlls/d3dx8/math.c

@@ -553,6 +553,20 @@ D3DXVECTOR3* WINAPI D3DXVec3Normalize(D3DXVECTOR3 *pout, CONST D3DXVECTOR3 *pv)
     return pout;
 }
 
+D3DXVECTOR3* WINAPI D3DXVec3Project(D3DXVECTOR3 *pout, CONST D3DXVECTOR3 *pv, CONST D3DVIEWPORT8 *pviewport, CONST D3DXMATRIX *pprojection, CONST D3DXMATRIX *pview, CONST D3DXMATRIX *pworld)
+{
+    D3DXMATRIX m1, m2;
+    D3DXVECTOR3 vec;
+
+    D3DXMatrixMultiply(&m1, pworld, pview);
+    D3DXMatrixMultiply(&m2, &m1, pprojection);
+    D3DXVec3TransformCoord(&vec, pv, &m2);
+    pout->x = pviewport->X +  ( 1.0f + vec.x ) * pviewport->Width / 2.0f;
+    pout->y = pviewport->Y +  ( 1.0f - vec.y ) * pviewport->Height / 2.0f;
+    pout->z = pviewport->MinZ + vec.z * ( pviewport->MaxZ - pviewport->MinZ );
+    return pout;
+}
+
 D3DXVECTOR4* WINAPI D3DXVec3Transform(D3DXVECTOR4 *pout, CONST D3DXVECTOR3 *pv, CONST D3DXMATRIX *pm)
 {
     pout->x = pm->u.m[0][0] * pv->x + pm->u.m[1][0] * pv->y + pm->u.m[2][0] * pv->z + pm->u.m[3][0];

dlls/d3dx8/tests/math.c

@@ -692,10 +692,11 @@ static void D3X8Vector2Test(void)
 
 static void D3X8Vector3Test(void)
 {
+    D3DVIEWPORT8 viewport;
     D3DXVECTOR3 expectedvec, gotvec, nul, nulproj, u, v, w, x;
     LPD3DXVECTOR3 funcpointer;
     D3DXVECTOR4 expectedtrans, gottrans;
-    D3DXMATRIX mat;
+    D3DXMATRIX mat, projection, view, world;
     FLOAT coeff1, coeff2, expected, got, scale;
 
     nul.x = 0.0f; nul.y = 0.0f; nul.z = 0.0f;
@@ -704,11 +705,26 @@ static void D3X8Vector3Test(void)
     w.x = 3.0f; w.y = -5.0f; w.z = 7.0f;
     x.x = 4.0f; x.y = 1.0f; x.z = 11.0f;
 
+    viewport.Width = 800; viewport.MinZ = 0.2f; viewport.X = 10;
+    viewport.Height = 680; viewport.MaxZ = 0.9f; viewport.Y = 5;
+
     U(mat).m[0][0] = 1.0f; U(mat).m[0][1] = 2.0f; U(mat).m[0][2] = 3.0f; U(mat).m[0][3] = 4.0f;
     U(mat).m[1][0] = 5.0f; U(mat).m[1][1] = 6.0f; U(mat).m[1][2] = 7.0f; U(mat).m[1][3] = 8.0f;
     U(mat).m[2][0] = 9.0f; U(mat).m[2][1] = 10.0f; U(mat).m[2][2] = 11.0f; U(mat).m[2][3] = 12.0f;
     U(mat).m[3][0] = 13.0f; U(mat).m[3][1] = 14.0f; U(mat).m[3][2] = 15.0f; U(mat).m[3][3] = 16.0f;
 
+    view.m[0][1] = 5.0f; view.m[0][2] = 7.0f; view.m[0][3] = 8.0f;
+    view.m[1][0] = 11.0f; view.m[1][2] = 16.0f; view.m[1][3] = 33.0f;
+    view.m[2][0] = 19.0f; view.m[2][1] = -21.0f; view.m[2][3] = 43.0f;
+    view.m[3][0] = 2.0f; view.m[3][1] = 3.0f; view.m[3][2] = -4.0f;
+    view.m[0][0] = 10.0f; view.m[1][1] = 20.0f; view.m[2][2] = 30.0f;
+    view.m[3][3] = -40.0f;
+
+    world.m[0][0] = 21.0f; world.m[0][1] = 2.0f; world.m[0][2] = 3.0f; world.m[0][3] = 4.0;
+    world.m[1][0] = 5.0f; world.m[1][1] = 23.0f; world.m[1][2] = 7.0f; world.m[1][3] = 8.0f;
+    world.m[2][0] = -8.0f; world.m[2][1] = -7.0f; world.m[2][2] = 25.0f; world.m[2][3] = -5.0f;
+    world.m[3][0] = -4.0f; world.m[3][1] = -3.0f; world.m[3][2] = -2.0f; world.m[3][3] = 27.0f;
+
     coeff1 = 2.0f; coeff2 = 5.0f;
     scale = -6.5f;
 
@@ -817,6 +833,12 @@ static void D3X8Vector3Test(void)
     D3DXVec3Normalize(&gotvec,&nul);
     expect_vec3(expectedvec,gotvec);
 
+/*_______________D3DXVec3Project_________________________*/
+    expectedvec.x = 1135.721924f; expectedvec.y = 147.086914f; expectedvec.z = 0.153412f;
+    D3DXMatrixPerspectiveFovLH(&projection,D3DX_PI/4.0f,20.0f/17.0f,1.0f,1000.0f);
+    D3DXVec3Project(&gotvec,&u,&viewport,&projection,&view,&world);
+    expect_vec3(expectedvec,gotvec);
+
 /*_______________D3DXVec3Scale____________________________*/
     expectedvec.x = -58.5f; expectedvec.y = -39.0f; expectedvec.z = -13.0f;
     D3DXVec3Scale(&gotvec,&u,scale);

include/d3dx8math.h

@@ -300,6 +300,7 @@ D3DXVECTOR3* WINAPI D3DXVec3BaryCentric(D3DXVECTOR3 *pout, CONST D3DXVECTOR3 *pv
 D3DXVECTOR3* WINAPI D3DXVec3CatmullRom( D3DXVECTOR3 *pout, CONST D3DXVECTOR3 *pv0, CONST D3DXVECTOR3 *pv1, CONST D3DXVECTOR3 *pv2, CONST D3DXVECTOR3 *pv3, FLOAT s);
 D3DXVECTOR3* WINAPI D3DXVec3Hermite(D3DXVECTOR3 *pout, CONST D3DXVECTOR3 *pv1, CONST D3DXVECTOR3 *pt1, CONST D3DXVECTOR3 *pv2, CONST D3DXVECTOR3 *pt2, FLOAT s);
 D3DXVECTOR3* WINAPI D3DXVec3Normalize(D3DXVECTOR3 *pout, CONST D3DXVECTOR3 *pv);
+D3DXVECTOR3* WINAPI D3DXVec3Project(D3DXVECTOR3 *pout, CONST D3DXVECTOR3 *pv, CONST D3DVIEWPORT8 *pviewport, CONST D3DXMATRIX *pprojection, CONST D3DXMATRIX *pview, CONST D3DXMATRIX *pworld);
 D3DXVECTOR4* WINAPI D3DXVec3Transform(D3DXVECTOR4 *pout, CONST D3DXVECTOR3 *pv, CONST D3DXMATRIX *pm);
 D3DXVECTOR3* WINAPI D3DXVec3TransformCoord(D3DXVECTOR3 *pout, CONST D3DXVECTOR3 *pv, CONST D3DXMATRIX *pm);
 D3DXVECTOR3* WINAPI D3DXVec3TransformNormal(D3DXVECTOR3 *pout, CONST D3DXVECTOR3 *pv, CONST D3DXMATRIX *pm);