Xiaolin Wu's line algorithm: Difference between revisions
Content added Content deleted
(Add task to ARM assembly Raspberry pi) |
(→{{header|Python}}: Fixed a bug related to endpoint drawing. Removed list concatenation to allow e.g. numpy arrays as inputs.) |
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def draw_line(img, p1, p2, color): |
def draw_line(img, p1, p2, color): |
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"""Draws an anti-aliased line in img from p1 to p2 with the given color.""" |
"""Draws an anti-aliased line in img from p1 to p2 with the given color.""" |
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x1, y1 |
x1, y1 = p1 |
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x2, y2 = p2 |
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dx, dy = x2-x1, y2-y1 |
dx, dy = x2-x1, y2-y1 |
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steep = abs(dx) < abs(dy) |
steep = abs(dx) < abs(dy) |
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xgap = _rfpart(x + 0.5) |
xgap = _rfpart(x + 0.5) |
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px, py = int(xend), int(yend) |
px, py = int(xend), int(yend) |
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putpixel(img, (px, py), color, _rfpart(yend) * xgap) |
putpixel(img, p(px, py), color, _rfpart(yend) * xgap) |
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putpixel(img, (px, py+1), color, _fpart(yend) * xgap) |
putpixel(img, p(px, py+1), color, _fpart(yend) * xgap) |
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return px |
return px |
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