Simple Line

Based on the simple slope-intercept algorithm from algebra

y = m x + b

y0 = m x0 + b

y1 = m x1 + b

m = (y1 - y0)/(x1 - x0) = dy/dx

b = y0 - m x0

public void lineSimple(int x0, int y0, int x1, int y1, Color color) {
	int pix = color.getRGB();
	int dx = x1 - x0;
	int dy = y1 - y0;
	raster.setPixel(pix, x0, y0);
	if (dx != 0) {
		float m = (float) dy / (float) dx;
		float b = y0 - m*x0;
		dx = (x1 > x0) ? 1 : -1;
		while (x0 != x1) {
			x0 += dx;
			y0 = Math.round(m*x0 + b);
			raster.setPixel(pix, x0, y0);
		}
	}
}