private void drawLine(Vec3d blockA, Vec3d blockB, int num, int f) {
        VertexBuffer tess = Tessellator.getInstance().getBuffer();
        blockB.addVector(0, 1, 0);
        int d = Math.round((float)blockA.distanceTo(blockB)+0.2f);
        blockB.addVector(0, -1, 0);
        if(num == 0) {
            blockA.addVector(0, -0.02f, 0);
            //drawSquare(blockA);
        }
        tess.begin(7, new VertexFormat());
        tess.putBrightness4(15728880, 15728880, 15728880, 15728880);
        if(num == 0) {
            tess.color(1F, 0F, 0F, 1F);//red
        }
        else if(num == 1) {
            switch(d) {
                case 7:
                case 6:
                case 5:
                    tess.color(1F, 0F, 0F, 1F);//red
                    break;
                case 4:
                    tess.color(1F, 0.35F, 0F, 1F);//red-orange
                    break;
                case 3:
                    tess.color(1F, 0.75F, 0F, 1F);//orange
                    break;
                default:
                    tess.color(0.75F, 1F, 0F, 1F);//lime
                    break;
            }
        }
        else {
            switch(d) {
                case 7:
                case 6:
                case 5:
                    tess.color(1F, 0.45F, 0F, 1F);//red-orange
                    break;
                case 4:
                    tess.color(0.8F, 0.8F, 0F, 1F);//orange
                    break;
                case 3:
                    tess.color(0.8F, 1F, 0F, 1F);//yellow
                    break;
                default:
                    tess.color(0F, 1F, 0F, 1F);//green
                    break;
            }
        }

        Vec3d recLong = blockA.subtract(blockB);
        Vec3d perpendicular = Vec3d.fromPitchYaw(1.0F, 1.0F);//(recLong.zCoord, recLong.yCoord, -recLong.xCoord);
        perpendicular = perpendicular.normalize();

        float Width = 1f/16f;

        Vec3d R1 = blockA.subtract(blockB);
        Vec3d R2 = blockA.subtract(blockB);
        Vec3d R3 = blockA.subtract(blockB);
        Vec3d R4 = blockA.subtract(blockB);

        R1.addVector( blockA.xCoord + perpendicular.xCoord * Width, 0, 0);
        R1.addVector(0, 0, blockA.zCoord + perpendicular.zCoord * Width);
        R2.addVector( blockA.xCoord - perpendicular.xCoord * Width, 0, 0);
        R2.addVector(0, 0, blockA.zCoord - perpendicular.zCoord * Width);
        R1.addVector(0, blockA.yCoord - 0.01, 0);
        R2.addVector(0, blockA.yCoord - 0.01, 0);

        R3.addVector(blockB.xCoord + perpendicular.xCoord * Width, 0, 0);
        R3.addVector(0, 0, blockB.zCoord + perpendicular.zCoord * Width);
        R4.addVector(blockB.xCoord - perpendicular.xCoord * Width, 0, 0);
        R4.addVector(0, 0, blockB.zCoord - perpendicular.zCoord * Width);
        R3.addVector(0, blockB.yCoord + 0.75, 0);
        R4.addVector(0, blockB.yCoord + 0.75, 0);

        int[] a = { (int) (R1.xCoord + 0.5), (int) R1.yCoord, (int) (R1.zCoord + 0.5)};
        int[] b = { (int) (R3.xCoord + 0.5), (int) R3.yCoord, (int) (R3.zCoord + 0.5)};
        int[] c = { (int) (R4.xCoord + 0.5), (int) R4.yCoord, (int) (R4.zCoord + 0.5)};
        int[] d2 = { (int) (R2.xCoord + 0.5), (int) R2.yCoord, (int) (R2.zCoord + 0.5)};

        tess.addVertexData(a);
        tess.addVertexData(b);
        tess.addVertexData(c);
        tess.addVertexData(d2);

        tess.finishDrawing();
    }