Space/Triangle.java at master · vladgaman/Space · GitHub

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class Triangle
{
	Vertex v1,v2,v3;
	Vertex normal;
	Vertex mid;
	boolean isDivided = false;
	boolean isSeen = true;
	int level = 0;
	Triangle(Vertex vert1, Vertex vert2, Vertex vert3)
	{
		v1 = vert1;
		v2 = vert2;
		v3 = vert3;

		Vertex v12 = new Vertex(v2);
		v12.sub(v1);
		Vertex v23 = new Vertex(v3);
		v23.sub(v2);
		normal = v12.cross(v23);
		normal.normalize();
	}

	Vertex setMid()
	{
		mid = new Vertex((v1.x+v2.x+v3.x)/3,(v1.y+v2.y+v3.y)/3,(v1.z+v2.z+v3.z)/3);
		return mid;
	}

	Vertex getMid()
	{
		return mid;
	}

	Vertex getV(Vertex v)
	{
		if(v.equals(v1))
			return v1;
		if(v.equals(v2))
			return v2;
		if(v.equals(v3))
			return v3;
		return null;
	}

	boolean isCloseTo(Frustum cam, float distance, Vector coord)
	{
		Vertex dist = new Vertex(cam.getCoord());
		if(mid == null)
			setMid();
		Vertex nM = new Vertex(mid);
		nM.add(new Vertex(coord.x,coord.y,coord.z));
		dist.sub(nM);
		return dist.getMagnitude() <= distance;
	}

	@Override
	public boolean equals(Object o)
	{
		if (this == o)
			return true;
		if (o == null)
			return false;
		if (getClass() != o.getClass())
		{
			Vertex vert = (Vertex) o;
			if(vert.equals(v1) || vert.equals(v2) || vert.equals(v3))
			{
				return true;
			}
			else
				return false;
		}
		else
		{
			Triangle tri = (Triangle) o;
			if(tri.v1.equals(v1) || tri.v2.equals(v2) || tri.v3.equals(v3))
				return true;
			else
				return false;
		}
	}
}