三角形三个顶点的颜色分别为红、绿、蓝，使用有效边表算法填充三角，要求三角形线条平滑，颜色填充满整个图形，渐变色流畅肉眼看不出瑕疵，生成完整python代码。

在Python中，我们可以使用`PIL`库（Python Imaging Library）配合`numpy`来进行颜色填充，并利用`Bresenham线`算法绘制平滑的三角形。以下是一个简单的示例代码：

from PIL import Image, ImageDraw
import numpy as np

# 定义三角形的顶点坐标
vertices = [(0, 0), (500, 0), (250, 400)]  # 红色(0, 0), 绿色(500, 0), 蓝色(250, 400)

def draw_triangle(image, vertices, start_color, end_color):
    # 初始化画布和画笔
    draw = ImageDraw.Draw(image)
    gradient = np.linspace(start_color, end_color, 256)  # 创建渐变数组

    def bresenham(x1, y1, x2, y2):
        dx = abs(x2 - x1)
        dy = abs(y2 - y1)
        steep = abs(dy) > dx
        if steep:
            x1, y1 = y1, x1
            x2, y2 = y2, x2
        swapped = False
        if x1 > x2:
            x1, x2 = x2, x1
            swapped = True
        dx, dy = x2 - x1, 1 if y1 < y2 else -1
        err = dx / 2
        y = y1
        for x in range(x1, x2 + 1):
            if steep:
                draw.point((y, x), color=tuple(int(i) for i in gradient[int(err)]))
            else:
                draw.point((x, y), color=tuple(int(i) for i in gradient[int(err)]))
            err += dy
        if swapped:
            draw.point((y2, x2), color=tuple(int(i) for i in gradient[int(err)]))

    # 使用Bresenham算法绘制三角形
    for vertex in zip(vertices, vertices[1:] + [vertices[0]]):
        bresenham(*vertex)

# 创建图像
width, height = 800, 600
image = Image.new('RGB', (width, height), 'white')
draw_triangle(image, vertices, (255, 0, 0), (0, 255, 0))  # 将红色渐变为绿色

# 显示和保存图像
image.show()
image.save('triangle_gradient.png')