void RenderShadow()
{
Device->SetRenderState(D3DRS_STENCILENABLE, true);
Device->SetRenderState(D3DRS_STENCILFUNC, D3DCMP_EQUAL);
Device->SetRenderState(D3DRS_STENCILREF, 0x0);
Device->SetRenderState(D3DRS_STENCILMASK, 0xffffffff);
Device->SetRenderState(D3DRS_STENCILWRITEMASK, 0xffffffff);
Device->SetRenderState(D3DRS_STENCILZFAIL, D3DSTENCILOP_KEEP);
Device->SetRenderState(D3DRS_STENCILFAIL, D3DSTENCILOP_KEEP);
Device->SetRenderState(D3DRS_STENCILPASS, D3DSTENCILOP_INCR); // increment to 1
// position shadow
D3DXVECTOR4 lightDirection(0.707f, -0.707f, 0.707f, 0.0f);
D3DXPLANE groundPlane(0.0f, -1.0f, 0.0f, 0.0f);
D3DXMATRIX S;
D3DXMatrixShadow(
&S,
&lightDirection,
&groundPlane);
D3DXMATRIX T;
D3DXMatrixTranslation(
&T,
TeapotPosition.x,
TeapotPosition.y,
TeapotPosition.z);
D3DXMATRIX W = T * S;
Device->SetTransform(D3DTS_WORLD, &W);
// alpha blend the shadow
Device->SetRenderState(D3DRS_ALPHABLENDENABLE, true);
Device->SetRenderState(D3DRS_SRCBLEND, D3DBLEND_SRCALPHA);
Device->SetRenderState(D3DRS_DESTBLEND, D3DBLEND_INVSRCALPHA);
D3DMATERIAL9 mtrl = d3d::InitMtrl(d3d::BLACK, d3d::BLACK, d3d::BLACK, d3d::BLACK, 0.0f);
mtrl.Diffuse.a = 0.5f; // 50% transparency.
// Disable depth buffer so that z-fighting doesn't occur when we
// render the shadow on top of the floor.
Device->SetRenderState(D3DRS_ZENABLE, false);
Device->SetMaterial(&mtrl);
Device->SetTexture(0, 0);
Teapot->DrawSubset(0);
Device->SetRenderState(D3DRS_ZENABLE, true);
Device->SetRenderState(D3DRS_ALPHABLENDENABLE, false);
Device->SetRenderState(D3DRS_STENCILENABLE, false);
}
// 그림자
void MSPlane::RenderShadow( void )
{
// 태양광에 의한 그림자
D3DLIGHT9 light;
g_pDevice->GetLight(0, &light);
light.Specular = D3DXCOLOR(0,0,0,0);
light.Range = 0;
// 내적을 위한 방향 전환
D3DXVECTOR4 vLight(light.Direction, 0);
vLight = - vLight;
// 그림자용 투영행렬 생성
D3DXPLANE plane(0,1,0,0); // 그림자용 평면
D3DXMATRIX mShadow;
D3DXMatrixShadow(&mShadow, &vLight, &plane);
m_pMesh->RenderShadow(m_mTM*mShadow);
}
