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// Copyright (C) 2002-2010 Nikolaus Gebhardt
// This file is part of the "Irrlicht Engine".
// For conditions of distribution and use, see copyright notice in irrlicht.h
#include "MyBillboardSceneNode.h"
#include "IVideoDriver.h"
#include "ISceneManager.h"
#include "ICameraSceneNode.h"
namespace irr
{
namespace scene
{
//! constructor
MyBillboardSceneNode::MyBillboardSceneNode(ISceneNode* parent,
ISceneManager* mgr, s32 id,
const core::vector3df& position, const core::dimension2d<f32>& size)
: IBillboardSceneNode(parent, mgr, id, position)
{
#ifdef _DEBUG
setDebugName("MyBillboardSceneNode");
#endif
setSize(size);
indices[0] = 0;
indices[1] = 2;
indices[2] = 1;
indices[3] = 0;
indices[4] = 3;
indices[5] = 2;
video::SColor colorTop = video::SColor(0xFFFFFFFF);
video::SColor colorBottom = video::SColor(0xFFFFFFFF);
vertices[0].TCoords.set(1.0f, 1.0f);
vertices[0].Color = colorBottom;
vertices[1].TCoords.set(1.0f, 0.0f);
vertices[1].Color = colorTop;
vertices[2].TCoords.set(0.0f, 0.0f);
vertices[2].Color = colorTop;
vertices[3].TCoords.set(0.0f, 1.0f);
vertices[3].Color = colorBottom;
}
//! pre render event
void MyBillboardSceneNode::OnRegisterSceneNode()
{
if (IsVisible)
SceneManager->registerNodeForRendering(this);
ISceneNode::OnRegisterSceneNode();
}
//! render
void MyBillboardSceneNode::render()
{
video::IVideoDriver* driver = SceneManager->getVideoDriver();
ICameraSceneNode* camera = SceneManager->getActiveCamera();
if (!camera || !driver)
return;
// make billboard look to camera
core::vector3df pos = getAbsolutePosition();
core::vector3df campos = camera->getAbsolutePosition();
core::vector3df target = camera->getTarget();
core::vector3df up = camera->getUpVector();
core::vector3df view = target - campos;
view.normalize();
core::vector3df horizontal = up.crossProduct(view);
if ( horizontal.getLength() == 0 )
{
horizontal.set(up.Y,up.X,up.Z);
}
horizontal.normalize();
horizontal *= 0.5f * Size.Width;
core::vector3df vertical = horizontal.crossProduct(view);
vertical.normalize();
vertical *= 0.5f * Size.Height;
view *= -1.0f;
for (s32 i=0; i<4; ++i)
vertices[i].Normal = view;
vertices[0].Pos = pos + horizontal + vertical;
vertices[1].Pos = pos + horizontal - vertical;
vertices[2].Pos = pos - horizontal - vertical;
vertices[3].Pos = pos - horizontal + vertical;
// draw
if ( DebugDataVisible & scene::EDS_BBOX )
{
driver->setTransform(video::ETS_WORLD, AbsoluteTransformation);
video::SMaterial m;
m.Lighting = false;
driver->setMaterial(m);
driver->draw3DBox(BBox, video::SColor(0,208,195,152));
}
driver->setTransform(video::ETS_WORLD, core::IdentityMatrix);
driver->setMaterial(Material);
driver->drawIndexedTriangleList(vertices, 4, indices, 2);
}
//! returns the axis aligned bounding box of this node
const core::aabbox3d<f32>& MyBillboardSceneNode::getBoundingBox() const
{
return BBox;
}
//! sets the size of the billboard
void MyBillboardSceneNode::setSize(const core::dimension2d<f32>& size)
{
Size = size;
if (Size.Width == 0.0f)
Size.Width = 1.0f;
if (Size.Height == 0.0f )
Size.Height = 1.0f;
f32 avg = (size.Width + size.Height)/6;
BBox.MinEdge.set(-avg,-avg,-avg);
BBox.MaxEdge.set(avg,avg,avg);
}
video::SMaterial& MyBillboardSceneNode::getMaterial(u32 i)
{
return Material;
}
//! returns amount of materials used by this scene node.
u32 MyBillboardSceneNode::getMaterialCount() const
{
return 1;
}
//! gets the size of the billboard
const core::dimension2d<f32>& MyBillboardSceneNode::getSize() const
{
return Size;
}
//! Set the color of all vertices of the billboard
//! \param overallColor: the color to set
void MyBillboardSceneNode::setColor(const video::SColor & overallColor)
{
for(u32 vertex = 0; vertex < 4; ++vertex)
vertices[vertex].Color = overallColor;
}
//! Set the color of the top and bottom vertices of the billboard
//! \param topColor: the color to set the top vertices
//! \param bottomColor: the color to set the bottom vertices
void MyBillboardSceneNode::setColor(const video::SColor & topColor, const video::SColor & bottomColor)
{
vertices[0].Color = bottomColor;
vertices[1].Color = topColor;
vertices[2].Color = topColor;
vertices[3].Color = bottomColor;
}
//! Gets the color of the top and bottom vertices of the billboard
//! \param[out] topColor: stores the color of the top vertices
//! \param[out] bottomColor: stores the color of the bottom vertices
void MyBillboardSceneNode::getColor(video::SColor & topColor, video::SColor & bottomColor) const
{
bottomColor = vertices[0].Color;
topColor = vertices[1].Color;
}
void MyBillboardSceneNode::setTCoords(u32 i, core::vector2d<f32> c)
{
vertices[i].TCoords = c;
}
} // end namespace scene
} // end namespace irr
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