package ecumene.opengl;

import org.lwjgl.opengl.GL11;
import org.lwjgl.util.vector.Vector2f;
import org.lwjgl.util.vector.Vector3f;
import org.lwjgl.util.vector.Vector4f;

import ecumene.data.Color;

/**
 * Contains data to be processed per-vertex, like color,
 * position, texture coordinates, and normals
 *
 * @author Ecumene
 */
public class Vertex {
	/**The vertex's location*/
	public Vector4f position;
	/**The vertex's uv*/
	public Vector2f textureUV;
	/**The vertex's color*/
	public Color color;
	/**The vertex's normal*/
	public Vector3f normal;

	/**
	 * Initializes the vertex with all possible information
	 *
	 * @param position The vertex's position
	 * @param textureUV The vertex's texture coordinate
	 * @param normal The vertex's normal
	 * @param color The vertex's color
	 */
	public Vertex(Vector4f position, Vector2f textureUV, Color color, Vector3f normal){
		this.position = position;
		this.textureUV = textureUV;
		this.color = color;
		this.normal = normal;
	}

	/**
	 * Initializes the vertex with no normal
	 *
	 * @param position The vertex's position
	 * @param textureUV The vertex's texture coordinate
	 * @param color The vertex's color
	 */
	public Vertex(Vector4f position, Vector2f textureUV, Color color){
		this(position, textureUV, color, new Vector3f(0, 0, 0));
	}

	/**
	 * Initializes the vertex with no normal, or texture coordinate
	 *
	 * @param position The vertex's position
	 * @param color The vertex's color
	 */
	public Vertex(Vector4f position, Color color){
		this(position, new Vector2f(0, 0), color, new Vector3f(0, 0, 0));
	}

	/**
	 * Initializes the vertex with no normal, color, or texture coordinate,
	 * just a position.
	 *
	 * @param position The vertex's position
	 */
	public Vertex(Vector4f position){
		this(position, new Vector2f(0, 0), new Color(1, 1, 1, 1), new Vector3f(0, 0, 0));
	}

	/**
	 * Draws the vertex using OpenGL 1.0
	 * @deprecated Because OpenGL 1.0 is very old
	 */
	@Deprecated
	public static void draw(Vertex vert){
		GL11.glVertex4f(vert.position.x, vert.position.y, vert.position.z, vert.position.w);
		GL11.glColor4f(vert.color.getRed(), vert.color.getGreen(), vert.color.getBlue(), vert.color.getAlpha());
		GL11.glNormal3f(vert.normal.x, vert.normal.y, vert.normal.z);
		GL11.glTexCoord2f(vert.textureUV.x, vert.textureUV.y);
	}

	/**
	 * Draws the vertex using OpenGL 1.0
	 * @deprecated Because OpenGL 1.0 is very old
	 */
	@Deprecated
	public void draw(){
		GL11.glVertex4f(position.x, position.y, position.z, position.w);
		GL11.glColor4f(color.getRed(), color.getGreen(), color.getBlue(), color.getAlpha());
		GL11.glNormal3f(normal.x, normal.y, normal.z);
		GL11.glTexCoord2f(textureUV.x, textureUV.y);
	}

	/**
	 * Draws the given vertices using OpenGL 1.0
	 * @deprecated Because OpenGL 1.0 is very old
	 */
	@Deprecated
	public static void drawAll(Vertex[] model, int mode){
		GL11.glBegin(mode);
		for(Vertex vert : model){
			GL11.glVertex4f(vert.position.x, vert.position.y, vert.position.z, vert.position.w);
			GL11.glColor4f(vert.color.getRed(), vert.color.getGreen(), vert.color.getBlue(), vert.color.getAlpha());
			GL11.glNormal3f(vert.normal.x, vert.normal.y, vert.normal.z);
			GL11.glTexCoord2f(vert.textureUV.x, vert.textureUV.y);
		}
		GL11.glEnd();
	}
}