void SetupLightingDX9(void)
{
// 取得Direct3D 9裝置
LPDIRECT3DDEVICE9 device = GutGetGraphicsDeviceDX9();
device->SetRenderState(D3DRS_LIGHTING, TRUE);
// 設定環境光
device->SetRenderState(D3DRS_AMBIENT, ConvertToD3DCOLOR(g_vAmbientLight));
// 設定光源
device->LightEnable(0, TRUE);
D3DLIGHT9 light;
ZeroMemory( &light, sizeof(light) );
light.Type = D3DLIGHT_POINT;
light.Position = *(D3DVECTOR *) &g_Light.m_Position;
light.Diffuse = *(D3DCOLORVALUE*) &g_Light.m_Diffuse;
light.Specular = *(D3DCOLORVALUE*) &g_Light.m_Specular;
light.Range = 100.0f;
light.Attenuation0 = 1.0f;
light.Attenuation1 = 0.0f;
light.Attenuation2 = 0.0f;
device->SetLight(0, &light);
}
void SetupLightingDX9(void)
{
// `取得Direct3D9裝置`
LPDIRECT3DDEVICE9 device = GutGetGraphicsDeviceDX9();
// `開啟打光功能`
device->SetRenderState(D3DRS_LIGHTING, TRUE);
// `開啟/關閉localviewer功能`
device->SetRenderState(D3DRS_LOCALVIEWER, g_bLocalViewer ? TRUE:FALSE);
// `開啟/關閉autonormalize功能`
device->SetRenderState(D3DRS_NORMALIZENORMALS, g_bAutoNormalize ? TRUE:FALSE);
// `設定環境光`
device->SetRenderState(D3DRS_AMBIENT, ConvertToD3DCOLOR(g_vGlobal_AmbientLight));
// `指定反光能力的資料來源, 把它設為經由SetMaterial函式中來設定.`
device->SetRenderState(D3DRS_AMBIENTMATERIALSOURCE, D3DMCS_MATERIAL);
device->SetRenderState(D3DRS_DIFFUSEMATERIALSOURCE, D3DMCS_MATERIAL);
device->SetRenderState(D3DRS_SPECULARMATERIALSOURCE, D3DMCS_MATERIAL);
device->SetRenderState(D3DRS_SPECULARENABLE, g_bSpecularReflection ? TRUE:FALSE);
// `設定物件材質的反光能力`
D3DMATERIAL9 mtrl;
ZeroMemory( &mtrl, sizeof(mtrl) );
mtrl.Ambient = *(D3DCOLORVALUE*) &g_vMaterialAmbient;
mtrl.Diffuse = *(D3DCOLORVALUE*) &g_vMaterialDiffuse;
mtrl.Specular = *(D3DCOLORVALUE*) &g_vMaterialSpecular;
mtrl.Emissive = *(D3DCOLORVALUE*) &g_vMaterialEmissive;
mtrl.Power = g_fMaterialShininess;
// `經由呼叫SetMaterial來設定材質`
device->SetMaterial(&mtrl);
// `設定光源`
for ( int i=0; i<g_iNumLights; i++ )
{
if ( g_Lights[i].m_bEnabled )
{
// `打開這盞光`
device->LightEnable(i, TRUE);
// `D3D9經由設定D3DLIGHT9 struct來設定光源屬性`
D3DLIGHT9 light;
ZeroMemory( &light, sizeof(light) );
switch(g_Lights[i].m_eType)
{
case LIGHT_DIRECTIONAL:
// `設定成方向光`
light.Type = D3DLIGHT_DIRECTIONAL;
light.Direction = *(D3DVECTOR *) &g_Lights[i].m_vDirection;
break;
case LIGHT_POINT:
// `設定成點光源`
light.Type = D3DLIGHT_POINT;
// `設定位置`
light.Position = *(D3DVECTOR *) &g_Lights[i].m_vPosition;
// `隨距離的衰減值`
// 1/(CONSTANT+LINEAR*d+QUADRATIC*d^2)
// `公式中的CONSTANT, LINEAR, QUADRATIC值`
light.Attenuation0 = g_Lights[i].m_vAttenuation[0];
light.Attenuation1 = g_Lights[i].m_vAttenuation[1];
light.Attenuation2 = g_Lights[i].m_vAttenuation[2];
break;
case LIGHT_SPOT:
// `設定成聚光燈`
light.Type = D3DLIGHT_SPOT;
// `設定位置`
light.Position = *(D3DVECTOR *) &g_Lights[i].m_vPosition;
// `設定方向`
light.Direction = *(D3DVECTOR *) &g_Lights[i].m_vDirection;
// `隨距離的衰減值`
// 1/(CONSTANT+LINEAR*d+QUADRATIC*d^2)
// `公式中的CONSTANT, LINEAR, QUADRATIC值`
light.Attenuation0 = g_Lights[i].m_vAttenuation[0];
light.Attenuation1 = g_Lights[i].m_vAttenuation[1];
light.Attenuation2 = g_Lights[i].m_vAttenuation[2];
// `光柱圓錐的一半角度`
light.Phi = FastMath::DegreeToRadian(g_Lights[i].m_fSpotlightCutoff);
// `Inner Cone的角度, Inner Cone內部沒有角度衰滅.`
light.Theta = FastMath::DegreeToRadian(g_Lights[i].m_fSpotLightInnerCone);
// `光柱的角度衰滅值`
light.Falloff = g_Lights[i].m_fSpotlightExponent;
break;
}
// `光源的Ambient值`
light.Ambient = *(D3DCOLORVALUE*) &g_Lights[i].m_vAmbientColor;
// `光源的Diffuse值`
light.Diffuse = *(D3DCOLORVALUE*) &g_Lights[i].m_vDiffuseColor;
// `光源的Specular值`
light.Specular = *(D3DCOLORVALUE*) &g_Lights[i].m_vSpecularColor;
// `光源有效范圍, 在此把它設定成浮點數所容計的最大值.`
light.Range = 1000.0f;
// `用SetLight來設定光源屬性`
device->SetLight(i, &light);
}
else
{
// `關閉這盞光`
device->LightEnable(i, FALSE);
}
}
}
