#include"box.h"

namespace vb01{
	Box::Box(Vector3 size){
		this->staticVerts = false;

		numTris = 12;
		indices = new u32[3 * numTris];
		vertices = new Vertex[3 * numTris];

		setSize(size);

		construct();
	}

	void Box::setSize(Vector3 size){
		this->size = size;
		Vector3 pos[] = {
			Vector3(size.x / 2, size.y / 2, size.z / 2),
			Vector3(-size.x / 2, size.y / 2, size.z / 2),
			Vector3(-size.x / 2, size.y / 2, -size.z / 2),
			Vector3(size.x / 2, size.y / 2, -size.z / 2),

			Vector3(size.x / 2, -size.y / 2, size.z / 2),
			Vector3(-size.x / 2, -size.y / 2, size.z / 2),
			Vector3(-size.x / 2, -size.y / 2, -size.z / 2),
			Vector3(size.x / 2, -size.y / 2, -size.z / 2)
		};
		Vector3 norm[] = {
			Vector3(0, 0, 1),
			Vector3(0, 1, 0),
			Vector3(1, 0, 0),

			Vector3(0, 0, -1),
			Vector3(0, -1, 0),
			Vector3(-1, 0, 0)
		};
		Vector2 tex[] = {
			Vector2(1, 1),
			Vector2(0, 1),
			Vector2(0, 0),
			Vector2(1, 0)
		};
		unsigned int data[]={
			0, 3, 1, 4, 3, 0, 1, 3, 2,	
			5, 3, 3, 1, 3, 2, 4, 3, 0,

			2, 0, 1, 6, 0, 0, 3, 0, 2,	
			6, 0, 2, 7, 0, 0, 3, 0, 3,

			3, 2, 0, 7, 2, 1, 4, 2, 2,
			4, 2, 2, 0, 2, 3, 3, 2, 0,

			1, 5, 0, 5, 5, 1, 6, 5, 2,
			6, 5, 2, 2, 5, 3, 1, 5, 0,

			0, 1, 0, 1, 1, 1, 2, 1, 2,
			2, 1, 2, 3, 1, 3, 0, 1, 0,

			4, 4, 3, 6, 4, 1, 5, 4, 2,
			6, 4, 1, 4, 4, 3, 7, 4, 0
		};
		for(int i = 0; i < 3 * numTris; i++){
			Vertex v;
			v.pos = pos[data[3 * i]];
			v.norm = norm[data[3 * i + 1]];
			v.uv = tex[data[3 * i + 2]];
			vertices[i] = v;
			indices[i] = i;
		}
	}
}