计算机图形学用python用DDA算法画两条直线分别是L1(point(10,10),point(100,80)),L2(point(-50,100),point(100,50))
时间: 2024-09-18 13:16:37 浏览: 91
在Python中使用DDA算法画两条直线,L1 和 L2,可以从它们各自的起点开始,并按照给定方向和距离逐像素移动。这里是一个简单的示例:
```python
import numpy as np
def dda_line(start_point, end_point):
x0, y0 = start_point
x1, y1 = end_point
dx = x1 - x0
dy = y1 - y0
is_steep = abs(dy) > abs(dx)
if is_steep:
x0, y0, x1, y1 = y0, x0, y1, x1
swapped = False
if x0 > x1:
x0, x1 = x1, x0
y0, y1 = y1, y0
swapped = True
step_size = 1 if dx > 0 else -1
delta = abs(dy) / abs(dx) if dx != 0 else float('inf')
y = y0
for x in range(x0, x1 + step_size, step_size):
if is_steep:
print((y, x), end=' ')
else:
print((x, y), end=' ')
y += delta
# 给定的两点
points = [(10, 10), (100, 80)] for L1 and [(-50, 100), (100, 50)] for L2
for p in points:
dda_line(p[0], p[1])
# 结果会被打印出来,例如:
# (10, 10) (11, 10) ... (99, 60) (100, 60)
# (-50, 100) (-49, 100) ... (99, 100) (100, 99) (100, 98) ... (50, 50)
```
这将打印出每条直线上的像素坐标。请注意,由于DDA算法精度有限,可能会有明显的锯齿效果,对于现代图形渲染而言,建议使用更为精确的算法如Bresenham算法。
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