C++ Visual类代码示例

void SkinController::OnFirstUpdate()
{
    // Get access to the vertex buffer positions to store the blended targets.
    Visual* visual = reinterpret_cast<Visual*>(mObject);
    VertexBuffer* vbuffer = visual->GetVertexBuffer().get();
    if (mNumVertices == static_cast<int>(vbuffer->GetNumElements()))
    {
        // Get the position data.
        VertexFormat vformat = vbuffer->GetFormat();
        int const numAttributes = vformat.GetNumAttributes();
        for (int i = 0; i < numAttributes; ++i)
        {
            VASemantic semantic;
            DFType type;
            unsigned int unit, offset;
            if (vformat.GetAttribute(i, semantic, type, unit, offset))
            {
                if (semantic == VA_POSITION && (type == DF_R32G32B32_FLOAT 
                    || type == DF_R32G32B32A32_FLOAT))
                {
                    mPosition = vbuffer->GetData() + offset;
                    mStride = vformat.GetVertexSize();
                    mCanUpdate = true;
                    break;
                }
            }
        }
    }

    mCanUpdate = (mPosition != nullptr);
}

Point MouseEventArgs::GetPosition(UIElement* relativeTo)
{
	gm::matrix3f m = gm::matrix3f::getIdentity();

	Visual* p = relativeTo;
	Visual* parent;
	while (parent = p->get_Parent())
	{
		Transform* transform = p->get_Transform();
		if (transform)
		{
			m *= transform->get_Matrix();
		}

		p = parent;
	}

	return m.getInverse().transform(m_clientpos);

	/*
	Visual* visual = dynamic_cast<Visual*>(relativeTo);
	ASSERT(visual);
	return visual->WindowToElement(m_windowX, m_windowY);
	*/
}

void Pdb::Explorer()
{
	VectorMap<String, Value> prev = DataMap(explorer);
	explorer.Clear();
	try {
		String x = ~expexp;
		if(!IsNull(x)) {
			CParser p(x);
			Val v = Exp(p);
			Vis(explorer, "=", prev, Visualise(v));
			if(v.type >= 0 && v.ref == 0 && !v.rvalue)
				Explore(v, prev);
			if(v.ref > 0 && GetRVal(v).address)
				for(int i = 0; i < 20; i++)
					Vis(explorer, Format("[%d]", i), prev, Visualise(DeRef(Compute(v, RValue(i), '+'))));
		}
	}
	catch(CParser::Error e) {
		Visual v;
		v.Cat(e, LtRed);
		explorer.Add("", RawPickToValue(v));
	}
	exback.Enable(exprev.GetCount());
	exfw.Enable(exnext.GetCount());
}

geometry UIElement::MakeVisibleGeometry(geometry clip)
{
	m_visibleGeometryValid = true;

	//gm::RectF bounds = clip.GetBounds();

	geometry clipThis = get_Clip();
	if (clipThis != nullptr)
	{
		clip &= clipThis;
	}

#ifdef _DEBUG
	gm::RectF bounds = clip.GetBounds();
#endif

	geometry geom = GetHitGeometry();
#ifdef _DEBUG
	gm::RectF bounds2 = geom.GetBounds();
#endif

	clip &= geom;

#ifdef _DEBUG
	gm::RectF bounds3 = clip.GetBounds();
#endif

	size_t nchildren = GetChildrenCount();
	for (size_t i = nchildren; i > 0; --i)
	{
		Visual* child = GetChild(i-1);

		geometry geom2 = child->MakeVisibleGeometry(clip);

		clip |= geom2;
	}

	UIElement* shadowTree = get_ShadowTree();
	if (shadowTree)
	{
		geometry geom2 = shadowTree->MakeVisibleGeometry(clip);

#ifdef _DEBUG
	gm::RectF bounds5 = geom2.GetBounds();
#endif

		clip |= geom2;
	}

#ifdef _DEBUG
	gm::RectF bounds4 = clip.GetBounds();
#endif

	set_VisibleGeometry(clip);

	return clip;
}

//----------------------------------------------------------------------------
bool MorphController::Update (double applicationTime)
{
    // The key interpolation uses linear interpolation.  To get higher-order
    // interpolation, you need to provide a more sophisticated key (Bezier
    // cubic or TCB spline, for example).

    if (!Controller::Update(applicationTime))
    {
        return false;
    }

    // Get access to the vertex buffer to store the blended targets.
    Visual* visual = StaticCast<Visual>(mObject);
    assertion(visual->GetVertexBuffer()->GetNumElements() == mNumVertices,
        "Mismatch in number of vertices.\n");

    VertexBufferAccessor vba(visual);

    // Set vertices to target[0].
    APoint* baseTarget = mVertices[0];
    int i;
    for (i = 0; i < mNumVertices; ++i)
    {
        vba.Position<Float3>(i) = baseTarget[i];
    }

    // Look up the bounding keys.
    float ctrlTime = (float)GetControlTime(applicationTime);
    float normTime;
    int i0, i1;
    GetKeyInfo(ctrlTime, normTime, i0, i1);

    // Add the remaining components in the convex composition.
    float* weights0 = mWeights[i0];
    float* weights1 = mWeights[i1];
    for (i = 1; i < mNumTargets; ++i)
    {
        // Add in the delta-vertices of target[i].
        float coeff = (1.0f-normTime)*weights0[i-1] + normTime*weights1[i-1];
        AVector* target = (AVector*)mVertices[i];
        for (int j = 0; j < mNumVertices; ++j)
        {
            APoint position = vba.Position<Float3>(j);
            position += coeff*target[j];
            vba.Position<Float3>(j) = position;
        }
    }

    visual->UpdateModelSpace(Visual::GU_NORMALS);
    Renderer::UpdateAll(visual->GetVertexBuffer());
    return true;
}

void Pdb::AddThis(const VectorMap<String, Val>& m, adr_t address, const VectorMap<String, Value>& prev)
{
	for(int i = 0; i < m.GetCount() && self.GetCount() < 2000; i++) {
		Val mv = m[i];
		mv.address += address;
		Visual vis;
		try {
			vis = Visualise(mv);
		}
		catch(CParser::Error e) {
			vis.Cat(e, SColorDisabled);
		}
		Vis(self, m.GetKey(i), prev, vis);
	}
}

//----------------------------------------------------------------------------
void Delaunay3D::ChangeTetraStatus (int index, const Float4& color,
    bool enableWire)
{
    Visual* tetra = DynamicCast<Visual>(mScene->GetChild(1 + index));
    assertion(tetra != 0, "Expecting a Visual object.\n");
    VertexBufferAccessor vba(tetra);
    for (int i = 0; i < 4; ++i)
    {
        vba.Color<Float4>(0, i) = color;
    }
    mRenderer->Update(tetra->GetVertexBuffer());

    VisualEffectInstance* instance = tetra->GetEffectInstance();
    instance->GetEffect()->GetWireState(0, 0)->Enabled = enableWire;
}

void Pdb::TryAuto(const String& exp, const VectorMap<String, Value>& prev)
{
	if(autos.Find(exp) < 0) {
		Visual r;
		try {
			CParser p(exp);
			Val v = Exp(p);
			Visualise(r, v, 2);
		}
		catch(CParser::Error) {
			r.Clear();
		}
		if(r.part.GetCount())
			Vis(autos, exp, prev, r);
	}
}

//----------------------------------------------------------------------------
void SMShadowEffect::Draw (Renderer* renderer, const VisibleSet& visibleSet)
{
    const int numVisible = visibleSet.GetNumVisible();
    for (int j = 0; j < numVisible; ++j)
    {
        // Replace the object's effect instance by the shadow-effect instance.
        Visual* visual = (Visual*)visibleSet.GetVisible(j);
        VisualEffectInstancePtr save = visual->GetEffectInstance();
        visual->SetEffectInstance(mInstance);

        // Draw the object using the shadow effect.
        renderer->Draw(visual);

        // Restore the object's effect instance.
        visual->SetEffectInstance(save);
    }
}

void Camera::Render(Context* context)
{
	float aspect = 1.0f;
	cachedproj.SetPerspective(fov, aspect, 0.1f, 100.0f);
	cachedview = GetWorldTransform().Inverse();

	Node* root = GetRoot();
	for(Node* node = root; node; node=node->GetNext())
	{
		if(node->HasFlag(Node::VISUAL))
		{
			Visual* visual = static_cast<Visual*>(node);
			visual->Render(context, this);
		}
		else if(node->HasFlag(Node::LIGHT))
		{
			// render a light shape
		}
	}

}

UIElement* UIElement::HitTest(gm::PointF point)
{
	int nchildren = (int)GetChildrenCount();
	for (int i = nchildren-1; i >= 0; --i)
	{
		Visual* child = GetChild(i);
		ASSERT(child);

		UIElement* hitElement = child->HitTest_(point);
		if (hitElement != nullptr)
		{
			return hitElement;
		}
	}

	/*
	//  TODO remove, done above?
	UIElement* shadowTree = get_ShadowTree();
	if (shadowTree)
	{
		UIElement* hitElement = shadowTree->HitTest_(point);
		if (hitElement)
		{
			return hitElement;
		}
	}
	*/

	geometry hitGeometry = GetHitGeometry();
//	geometry hitGeometry = get_VisibleGeometry();
//	if (hitGeometry != nullptr)
	{
		if (hitGeometry.FillContains(point))
		{
			return this;
		}
	}

	return nullptr;
}

//----------------------------------------------------------------------------
bool SkinController::Update (double applicationTime)
{
    if (!Controller::Update(applicationTime))
    {
        return false;
    }

    // Get access to the vertex buffer to store the blended targets.
    Visual* visual = StaticCast<Visual>(mObject);
    assertion(mNumVertices == visual->GetVertexBuffer()->GetNumElements(),
        "Controller must have the same number of vertices as the buffer\n");
    VertexBufferAccessor vba(visual);

    // The skin vertices are calculated in the bone world coordinate system,
    // so the visual's world transform must be the identity.
    visual->WorldTransform = Transform::IDENTITY;
    visual->WorldTransformIsCurrent = true;

    // Compute the skin vertex locations.
    for (int vertex = 0; vertex < mNumVertices; ++vertex)
    {
        APoint position = APoint::ORIGIN;
        for (int bone = 0; bone < mNumBones; ++bone)
        {
            float weight = mWeights[vertex][bone];
            if (weight != 0.0f)
            {
                APoint offset = mOffsets[vertex][bone];
                APoint worldOffset = mBones[bone]->WorldTransform*offset;
                position += weight*worldOffset;
            }
        }
        vba.Position<Float3>(vertex) = position;
    }

    visual->UpdateModelSpace(Visual::GU_NORMALS);
    Renderer::UpdateAll(visual->GetVertexBuffer());
    return true;
}

bool Pdb::Tip(const String& exp, CodeEditor::MouseTip& mt)
{
/*	mt.display = &StdDisplay();
	mt.value = exp;
	mt.sz = Size(100, 20);
	return true;*/
	DR_LOG("Pdb::Tip");
	Visual r;
	try {
		CParser p(exp);
		Val v = Exp(p);
		Visualise(r, v, 2);
		if(r.part.GetCount()) {
			mt.sz = r.GetSize() + Size(4, 4);
			mt.value = RawPickToValue(r);
			mt.display = &Single<VisualDisplay>();
			DR_LOG("Pdb::Tip true");
			return true;
		}
	}
	catch(CParser::Error) {}
	DR_LOG("Pdb::Tip false");
	return false;
}

	void SetWindow(CoreWindow const & window)
	{
		Compositor compositor;
		ContainerVisual root = compositor.CreateContainerVisual();
		m_target = compositor.CreateTargetForCurrentView();
		m_target.Root(root);
		m_visuals = root.Children();

		window.PointerPressed([&](auto const &, PointerEventArgs const & args)
		{
			Point point = args.CurrentPoint().Position();

			if (args.KeyModifiers() == VirtualKeyModifiers::Control)
			{
				AddVisual(point);
			}
			else
			{
				SelectVisual(point);
			}
		});

		window.PointerMoved([&](auto const &, PointerEventArgs const & args)
		{
			if (m_selected)
			{
				Point point = args.CurrentPoint().Position();

				m_selected.Offset(Vector3
				{
					point.X + m_offset.X,
					point.Y + m_offset.Y
				});
			}
		});

		window.PointerReleased([&](auto const &, auto const &)
		{
			m_selected = nullptr;
		});
	}

bool parseVisual(Visual &vis, TiXmlElement *config)
{
  vis.clear();

  // Origin
  TiXmlElement *o = config->FirstChildElement("origin");
  if (o) {
    if (!parsePose(vis.origin, o))
      return false;
  }

  // Geometry
  TiXmlElement *geom = config->FirstChildElement("geometry");
  vis.geometry = parseGeometry(geom);
  if (!vis.geometry)
    return false;

  const char *name_char = config->Attribute("name");
  if (name_char)
    vis.name = name_char;

  // Material
  TiXmlElement *mat = config->FirstChildElement("material");
  if (mat) {
    // get material name
    if (!mat->Attribute("name")) {
      logError("Visual material must contain a name attribute");
      return false;
    }
    vis.material_name = mat->Attribute("name");

    // try to parse material element in place
    resetPtr(vis.material,new Material());
    if (!parseMaterial(*vis.material, mat, true))
    {
      logDebug("urdfdom: material has only name, actual material definition may be in the model");
    }
  }

  return true;
}