src/MyBillboardSceneNode.cpp


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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();