Esempio n. 1
0
  public void prect(Coord c, Coord ul, Coord br, double a) {
    st.set(cur2d);
    apply();
    gl.glEnable(GL2.GL_POLYGON_SMOOTH);
    gl.glBegin(GL.GL_TRIANGLE_FAN);
    vertex(c);
    vertex(c.add(0, ul.y));
    double p2 = Math.PI / 2;
    all:
    {
      float tc;

      tc = (float) (Math.tan(a) * -ul.y);
      if ((a > p2) || (tc > br.x)) {
        vertex(c.x + br.x, c.y + ul.y);
      } else {
        vertex(c.x + tc, c.y + ul.y);
        break all;
      }

      tc = (float) (Math.tan(a - (Math.PI / 2)) * br.x);
      if ((a > p2 * 2) || (tc > br.y)) {
        vertex(c.x + br.x, c.y + br.y);
      } else {
        vertex(c.x + br.x, c.y + tc);
        break all;
      }

      tc = (float) (-Math.tan(a - Math.PI) * br.y);
      if ((a > p2 * 3) || (tc < ul.x)) {
        vertex(c.x + ul.x, c.y + br.y);
      } else {
        vertex(c.x + tc, c.y + br.y);
        break all;
      }

      tc = (float) (-Math.tan(a - (3 * Math.PI / 2)) * -ul.x);
      if ((a > p2 * 4) || (tc < ul.y)) {
        vertex(c.x + ul.x, c.y + ul.y);
      } else {
        vertex(c.x + ul.x, c.y + tc);
        break all;
      }

      tc = (float) (Math.tan(a) * -ul.y);
      vertex(c.x + tc, c.y + ul.y);
    }
    gl.glEnd();
    gl.glDisable(GL2.GL_POLYGON_SMOOTH);
    checkerr();
  }
 private EyeViewport initViewportForEye(final FieldOfView fov, final float xOffset) {
   final float left = (float) Math.tan(Math.toRadians(fov.getLeft()));
   final float right = (float) Math.tan(Math.toRadians(fov.getRight()));
   final float bottom = (float) Math.tan(Math.toRadians(fov.getBottom()));
   final float top = (float) Math.tan(Math.toRadians(fov.getTop()));
   final EyeViewport vp = new EyeViewport();
   vp.x = xOffset;
   vp.y = 0.0f;
   vp.width = left + right;
   vp.height = bottom + top;
   vp.eyeX = left + xOffset;
   vp.eyeY = bottom;
   return vp;
 }