code: public void drawGradientLine(float x1, float y1, float red1, float green1,
  									float blue1, float alpha1, float x2, float y2, float red2,
  									float green2, float blue2, float alpha2) {
  		predraw();
  
  		TextureImpl.bindNone();
  
  		GL.glBegin(SGL.GL_LINES);
  
  		GL.glColor4f(red1, green1, blue1, alpha1);
  		GL.glVertex2f(x1, y1);
  
  		GL.glColor4f(red2, green2, blue2, alpha2);
  		GL.glVertex2f(x2, y2);
  
  		GL.glEnd();
  
  		postdraw();
  	}
docs: Draw a line with a gradient between the two points.
  
  @param x1
  The starting x position to draw the line
  @param y1
  The starting y position to draw the line
  @param red1
  The starting position's shade of red
  @param green1
  The starting position's shade of green
  @param blue1
  The starting position's shade of blue
  @param alpha1
  The starting position's alpha value
  @param x2
  The ending x position to draw the line
  @param y2
  The ending y position to draw the line
  @param red2
  The ending position's shade of red
  @param green2
  The ending position's shade of green
  @param blue2
  The ending position's shade of blue
  @param alpha2
  The ending position's alpha value