Brush

class brushTool(Tool):
    """Draws continuous circles at a given size"""
    def canvasDown(self):
        global toolLoc
        toolLoc = cm()
    def canvasHold(self):
        if key.get_pressed()[K_LCTRL] or key.get_pressed()[K_RCTRL]:
            color = tuple(map(cc, hls(hue/255, 0.5, 1)))
        else:
            color = currentColour
            
        global layers
        global toolLoc
        self.m = (cm()[1] - toolLoc[1])/(cm()[0] - toolLoc[0] + (1 if cm()[0] - toolLoc[0] == 0 else 0))
        self.b = cm()[1] - (self.m * cm()[0])
        if abs(cm()[0] - toolLoc[0]) > abs(cm()[1] - toolLoc[1]):
            if cm()[0] < toolLoc[0]:
                for i in range(cm()[0], toolLoc[0]):
                    draw.circle(layers[currentLayer], color, (i, round(self.m*i + self.b)), size)
            else:
                for i in range(toolLoc[0], cm()[0]):
                    draw.circle(layers[currentLayer], color, (i, round(self.m*i + self.b)), size)
        else:
            if cm()[1] < toolLoc[1]:
                for i in range(cm()[1], toolLoc[1]):
                    draw.circle(layers[currentLayer], color, (round((i-self.b)/self.m) if self.m != 0 else round(self.b), i), size)
            else:
                for i in range(toolLoc[1], cm()[1]):
                    draw.circle(layers[currentLayer], color, (round((i-self.b)/self.m) if self.m != 0 else round(self.b), i), size)
        toolLoc = cm()