// *************************************************************************************************
void makeInstanceTransparent(UInstance &inst, uint8 opacity, bool disableZWrite)
{
UShape shape= inst.getShape();
if(shape.empty())
return;
uint numMats= shape.getNumMaterials();
if(numMats==0)
return;
if(numMats!=inst.getNumMaterials())
return;
// instance transparent or not?
if (opacity == 255)
{
// reset default shape opacity / transparency
inst.setOpacity(shape.getDefaultOpacity());
inst.setTransparency(shape.getDefaultTransparency());
inst.setBypassLODOpacityFlag(false);
}
else
{
// Will have some blend material => sure not to be rendered in Opaque pass
inst.setOpacity(false);
inst.setTransparency(true);
inst.setBypassLODOpacityFlag(true); // these flags prevails over the current lods flags for multi-lod objects
}
// set all materials
for (uint32 j = 0; j < numMats; ++j)
{
NL3D::UInstanceMaterial matInst = inst.getMaterial(j);
NL3D::UMaterial matShape= shape.getMaterial(j);
// disalbe zwrite?
if(disableZWrite)
matInst.setZWrite(false);
else
matInst.setZWrite(matShape.getZWrite());
// if no more transparent
if (opacity == 255)
{
// reset to default
matInst.setBlend(matShape.getBlend());
matInst.setBlendFunc((NL3D::UInstanceMaterial::TBlend)matShape.getSrcBlend(),
(NL3D::UInstanceMaterial::TBlend)matShape.getDstBlend());
// if orginal material is opaque or additif and has no alpha test, then ensure restore last tex env if needed
CMaterial *destInternalMat = matInst.getObjectPtr();
if (!matShape.getBlend() && !matShape.getAlphaTest())
{
if (destInternalMat->getShader() == CMaterial::Normal)
{
CMaterial *srcInternalMat = matShape.getObjectPtr();
uint numTex = 0;
for (;numTex < 4 && srcInternalMat->getTexture(numTex) != NULL; ++numTex) {}
if (numTex > 0)
{
if (srcInternalMat->getTexEnvMode(numTex - 1) != destInternalMat->getTexEnvMode(numTex - 1))
{
destInternalMat->setTexEnvMode(numTex - 1, srcInternalMat->getTexEnvMode(numTex - 1));
}
}
}
}
if (destInternalMat->getShader() == CMaterial::Normal)
{
// if !lighted, restore color
if (!destInternalMat->isLighted())
{
CMaterial *srcInternalMat = matShape.getObjectPtr();
// restore alpha in color
CRGBA color = destInternalMat->getColor();
color.A = srcInternalMat->getColor().A;
destInternalMat->setColor(color);
}
}
}
else
{
// Enable blend
matInst.setBlend(true);
// If default is ???/one or , then use a srcalpha/one (eg: for Diamond-like weapons)
if(matShape.getBlend() && (sint32)matShape.getDstBlend()==(sint32)NL3D::UInstanceMaterial::one)
matInst.setBlendFunc(NL3D::UInstanceMaterial::srcalpha, NL3D::UInstanceMaterial::one);
// else use a standard srcalpha/invsrcalpha
else
matInst.setBlendFunc(NL3D::UInstanceMaterial::srcalpha, NL3D::UInstanceMaterial::invsrcalpha);
// if orginal material is opaque or additif and has no alpha test, then ensure that the alpha output is 'diffuse'
CMaterial *internalMat = matInst.getObjectPtr();
if (!matShape.getBlend() && !matShape.getAlphaTest())
{
if (internalMat->getShader() == CMaterial::Normal)
{
uint numTex = 0;
for (;numTex < 4 && internalMat->getTexture(numTex) != NULL; ++numTex) {}
if (numTex > 0)
{
internalMat->texEnvOpAlpha(numTex - 1, CMaterial::Replace);
// if material is unlighted, then use the constant at this stage to set the alpha
internalMat->texEnvArg0Alpha(numTex - 1, CMaterial::Diffuse, CMaterial::SrcAlpha);
}
}
}
if (internalMat->getShader() == CMaterial::Normal)
{
if (!internalMat->isLighted())
{
// replace alpha in color
CRGBA color = internalMat->getColor();
color.A = opacity;
internalMat->setColor(color);
}
}
}
// suppose that default opacity is always 255
if (matInst.isLighted())
{
matInst.setOpacity(opacity);
}
matInst.setAlphaTestThreshold(matShape.getAlphaTestThreshold()*((float)opacity)/255.0f);
}
}
