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    Line is a function that draws a line using two points. For most shapes you can set the color using fill() , but a line is only a stroke, so you must use stroke() to set the color.


    line(x1, y1, x2, y2);

    • x1 - (float) the first point's x position
    • y1 - (float) the first point's y position
    • x2 - (float) the second point's x position
    • y2 - (float) the second point's y position


    void update() 
        // set the stroke color to orange
        stroke(color(255, 160, 20, 255));
        // draw a line from (100, 100) to (100, 200)
        //   x1      y1      x2      y2
        line(100.0f, 100.0f, 500.0f, 100.0f);
        // set the stroke color to light blue
        stroke(color(0, 160, 255, 255));
        // draw a line from the origin to the mouse position
        line(0.0f, 0.0f, mouseX, mouseY);