/**
    \file 
        SceneContentGenerator.cpp
    \brief
        Creates content for a scene.
*/
#include "SceneContentGenerator.h"

namespace Ogre {

/*******************************************************/
/*     SceneContentGenerator implementation            */
/*******************************************************/

//-----------------------------------------------------------------------
SceneContentGenerator::SceneContentGenerator(SceneManager *sm):
mSceneMgr(sm), mCount(0),
mMinPos(Vector3(-70.0f, -70.0f, 0.0f)),
mMaxPos(Vector3(70.0f, 70.0f, 600.0f)), 
mMinAngle(Vector3(0.0f, 0.0f, 0.0f)),
mMaxAngle(Vector3(360, 360, 360)),
mScale(0.1, 0.1, 0.1)
{
}
//-----------------------------------------------------------------------
void SceneContentGenerator::GenerateScene(int numObjects, const String &objName)
{
	// initialise random generator
	srand (time(0));
	
	Vector3 rotationRatio;
	Vector3 translationRatio;

	int currentCount = mCount;
	int limit = 0;

	//-- create random values between zero and one
	while ((mCount - currentCount < numObjects) && (limit < 50000))
	{
		rotationRatio.x = rand() / (float) RAND_MAX;
		rotationRatio.y = rand() / (float) RAND_MAX;
		rotationRatio.z = rand() / (float) RAND_MAX;

		translationRatio.x = rand() / (float) RAND_MAX;
		translationRatio.y = rand() / (float) RAND_MAX;
		translationRatio.z = rand() / (float) RAND_MAX;

		// Setup the ray scene query
		Vector3 rotation = mMinAngle + rotationRatio * (mMaxAngle - mMinAngle);
		Vector3 position = mMinPos + translationRatio * (mMaxPos - mMinPos);

		(void)GenerateSceneObject(position, rotation, objName);
		++limit; // just in case: to avoid endless loop
	}
}
//-----------------------------------------------------------------------
SceneNode *SceneContentGenerator::GenerateSceneObject(const Vector3 &position, 
					 const Vector3 &rotation, const String& objName)
{
	char name[25];
	sprintf(name, "Entity%d", mCount++);
		
	Entity *ent = mSceneMgr->createEntity(name, objName);
		
	SceneNode *currentObject = mSceneMgr->getRootSceneNode()->
		createChildSceneNode(String(name) + "Node", position);

	currentObject->attachObject(ent);
	currentObject->setScale(mScale);
		
	currentObject->yaw(Degree(rotation.x));
	currentObject->pitch(Degree(rotation.y));
	currentObject->roll(Degree(rotation.z));

	/*
	char msg[100];
	sprintf(msg, "pos: %3.3f %3.3f %3.3f\n", position.x, position.y, position.z);
	OutputDebugString(msg);
	*/

	return currentObject;
}
//-----------------------------------------------------------------------
void SceneContentGenerator::SetMinAngle(Vector3 minAngle)
{
	mMinAngle = minAngle;
}
//-----------------------------------------------------------------------
void SceneContentGenerator::SetMaxAngle(Vector3 maxAngle)
{
	mMaxAngle = maxAngle;
}
//-----------------------------------------------------------------------
void SceneContentGenerator::SetMinPos(Vector3 minPos)
{
	mMinPos = minPos;
}
//-----------------------------------------------------------------------
void SceneContentGenerator::SetMaxPos(Vector3 maxPos)
{
	mMaxPos = maxPos;
}
//-----------------------------------------------------------------------
int SceneContentGenerator::GetObjectCount()
{
	return mCount;
}
//-----------------------------------------------------------------------
void SceneContentGenerator::SetScale(Vector3 scale)
{
	mScale = scale;
}
} // namespace Ogre