Mesh::Mesh(char* filename,IDirect3DDevice9* _device)
{
	//code that creates the mesh

	look = D3DXVECTOR3(0,0,1);
	up = D3DXVECTOR3(0,1,0);
	right = D3DXVECTOR3(1,0,0);
	pos = D3DXVECTOR3(0,0,0);
}

Mesh::~Mesh()
{
	d3d::Release<ID3DXMesh*>(mesh);

	for(int i = 0; i < texture.size(); i++)
		d3d::Release<IDirect3DTexture9*>( texture );
}

void Mesh::translate(float x, float y, float z)
{
	pos += right * x;
	pos += up * y;
	pos += look * z;
}

void Mesh::setPosition(float x, float y, float z)
{
	pos.x = x;
	pos.y = y;
	pos.z = z;
}
	
void Mesh::yaw(Radian angle)
{
	D3DXMATRIX T;

	D3DXMatrixRotationAxis(&T,&up,angle.radian);
	D3DXVec3TransformCoord(&right,&right,&T);
	D3DXVec3TransformCoord(&look,&look,&T);
}

void Mesh::pitch(Radian angle)
{
	D3DXMATRIX T;

	D3DXMatrixRotationAxis(&T,&right,angle.radian);
	D3DXVec3TransformCoord(&up,&up,&T);
	D3DXVec3TransformCoord(&look,&look,&T);
}

void Mesh::roll(Radian angle)
{
	D3DXMATRIX T;

	D3DXMatrixRotationAxis(&T,&look,angle.radian);
	D3DXVec3TransformCoord(&right,&right,&T);
	D3DXVec3TransformCoord(&up,&up,&T);
}

void Mesh::getTransMatrix(D3DXMATRIX* V)
{
	//keep the camera axes orthogonal to each other
	D3DXVec3Normalize(&look,&look);

	D3DXVec3Cross(&up,&look,&right);
	D3DXVec3Normalize(&up,&up);

	D3DXVec3Cross(&right,&up,&look);
	D3DXVec3Normalize(&right,&right);

	(*V)(0,0) = right.x;
	(*V)(0,1) = up.x;
	(*V)(0,2) = look.x;
	(*V)(0,3) = 0.0f;

	(*V)(1,0) = right.y;
	(*V)(1,1) = up.y;
	(*V)(1,2) = look.y;
	(*V)(1,3) = 0.0f;

	(*V)(2,0) = right.z;
	(*V)(2,1) = up.z;
	(*V)(2,2) = look.z;
	(*V)(2,3) = 0.0f;

	(*V)(3,0) = pos.x;
	(*V)(3,1) = pos.y;
	(*V)(3,2) = pos.z;
	(*V)(3,3) = 1.0f;

}

void Mesh::update()
{
	D3DXMATRIX V;
	getTransMatrix(&V);
	device->SetTransform(D3DTS_WORLD,&V);
	for(int i = 0; i < mtrl.size(); i++)
	{
		device->SetMaterial(&mtrl);
		device->SetTexture(0,texture);
		mesh->DrawSubset(i);
	}
}