package de.gamezock.metacraft.ui;

import javax.media.opengl.GL;
import javax.media.opengl.GL2;
import javax.vecmath.Point3f;
import javax.vecmath.Vector3f;

import de.gamezock.metacraft.data.Map;
import de.gamezock.metacraft.data.Triangle;

public class Renderer {
  private Main main;
  
  public Renderer(Main main) {
    this.main = main;
  }
  
  private void renderTriangle(GL2 gl, Triangle t) {
    for(int i = 0; i < 3; ++i) {
      Point3f v = t.getVertex(i);
      Vector3f n = t.getNormal(i);
      
      gl.glNormal3f(n.x, n.y, n.z);
      gl.glVertex3f(v.x, v.y, v.z);
    }
  }
  
  public void render(GL2 gl) {
    gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
    
    Map currentMap = main.getCurrentMap();
    
    gl.glPushMatrix();
    gl.glRotatef((System.currentTimeMillis()%9000)/25.0f, 0, 0, 1);
    gl.glTranslatef(-20, -20, 0);
    
    gl.glBegin(GL.GL_TRIANGLES);
    
    gl.glColor3f(1, 1, 1);
    
    for(Triangle t : currentMap.getTriangleData()) {
      renderTriangle(gl, t);
    }
    
    gl.glEnd();
    
    gl.glPopMatrix();
  }
}