//设置渲染状态（环境光，颜色）
g_pd3dDevice->SetRenderState(D3DRS_AMBIENT, D3DCOLOR_XRGB(100, 100, 100));

//设置渲染状态（镜面反射，开启）
g_pd3dDevice->SetRenderState(D3DRS_SPECULARENABLE, TRUE);

D3DLIGHT9 InitPointLight(D3DXVECTOR3* position, D3DXCOLOR* color)
{
	D3DLIGHT9 light;
	::ZeroMemory(&light, sizeof(light));
	light.Type = D3DLIGHT_POINT; //类型为点光源
	light.Ambient = *color*.6f; //环境光颜色值
	light.Diffuse = *color; //漫反射颜色值
	light.Specular = *color*.6f; //镜面反射颜色值
	light.Position = *position; //光源位置
	light.Range = 1000; //光照范围
	light.Attenuation0 = 1; //这三个参数，表示光强随距离衰减的方式
	light.Attenuation1 = 0;
	light.Attenuation2 = 0;
	return light;
}
D3DXVECTOR3 pos(0, 0, 0);
D3DXCOLOR color = D3DCOLOR_XRGB(255, 255, 255);
D3DLIGHT9 point;
point = InitPointLight(&pos, &color);
//设置光源（选择第一个光源，填充好的灯光类型地址）
g_pd3dDevice->SetLight(0, &point);
//启用光照（选择第一个光源，开灯）
g_pd3dDevice->LightEnable(0, true);
//设置渲染状态（对法线向量进行归一化处理，开启）
g_pd3dDevice->SetRenderState(D3DRS_NORMALIZENORMALS, true);
g_pd3dDevice->SetRenderState(D3DRS_SPECULARENABLE, false);

D3DLIGHT9 InitDirectionalLight(D3DXVECTOR3* direction, D3DXCOLOR* color)
{
	D3DLIGHT9 light;
	::ZeroMemory(&light, sizeof(light));
	light.Type = D3DLIGHT_DIRECTIONAL;
	light.Ambient = *color*.6f;
	light.Diffuse = *color;
	light.Specular = *color*.6f;
	light.Direction = *direction; //光源光照方向
	return light;
}
D3DLIGHT9 directional;
D3DXVECTOR3 dir(1, 0, .25f);
D3DXCOLOR color = D3DCOLOR_XRGB(255, 255, 255);
directional = InitDirectionalLight(&dir, &color);
g_pd3dDevice->SetLight(0, &directional);
g_pd3dDevice->LightEnable(0, true);
g_pd3dDevice->SetRenderState(D3DRS_NORMALIZENORMALS, true);
g_pd3dDevice->SetRenderState(D3DRS_SPECULARENABLE, false);

D3DLIGHT9 InitSpotLight(D3DXVECTOR3* position, D3DXVECTOR3* direction, D3DXCOLOR* color)
{
	D3DLIGHT9 light;
	::ZeroMemory(&light, sizeof(light));
	light.Type = D3DLIGHT_SPOT;
	light.Ambient = *color*.0f;
	light.Diffuse = *color;
	light.Specular = *color*.6f;
	light.Position = *position;
	light.Direction = *direction;
	light.Range = 1000;
	light.Falloff = 1; //用于聚光灯从内锥形到外锥形的衰减方式 
	light.Attenuation0 = 1;
	light.Attenuation1 = 0;
	light.Attenuation2 = 0;
	light.Theta = .4f; //仅用于聚光灯，内锥形的角度，单位为弧度
	light.Phi = .9f; //仅用于聚光灯，外锥形的角度，单位为弧度
	return light;
}
D3DLIGHT9 spot;
D3DXVECTOR3 pos(0, 0, -5);
D3DXVECTOR3 dir(0, 0, 1);
D3DXCOLOR color = White;
spot = InitSpotLight(&pos, &dir, &color);
g_pd3dDevice->SetLight(0, &spot);
g_pd3dDevice->LightEnable(0, true);
g_pd3dDevice->SetRenderState(D3DRS_NORMALIZENORMALS, true);
g_pd3dDevice->SetRenderState(D3DRS_SPECULARENABLE, true);

ID3DXMesh* teapot;
D3DXCreateTeapot(g_pd3dDevice, &teapot, 0);

D3DMATERIAL9 mtrl;
mtrl.Ambient = (D3DXCOLOR)D3DCOLOR_XRGB(255, 0, 0);
mtrl.Diffuse = (D3DXCOLOR)D3DCOLOR_XRGB(255, 0, 0);
mtrl.Specular = (D3DXCOLOR)D3DCOLOR_XRGB(255, 0, 0);
mtrl.Power = 2;
mtrl.Emissive = (D3DXCOLOR)D3DCOLOR_XRGB(0, 0, 0);

g_pd3dDevice->SetMaterial(&mtrl);
teapot->DrawSubset(0);