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Diffstat (limited to 'examples/mandelbrot.sql')
| -rw-r--r-- | examples/mandelbrot.sql | 31 |
1 files changed, 0 insertions, 31 deletions
diff --git a/examples/mandelbrot.sql b/examples/mandelbrot.sql deleted file mode 100644 index 1c25461..0000000 --- a/examples/mandelbrot.sql +++ /dev/null @@ -1,31 +0,0 @@ -DELETE FROM images WHERE id = 'mandelbrot'; -INSERT INTO images (id, width, height) VALUES ('mandelbrot', 400, 400) RETURNING id; - -WITH RECURSIVE - image AS (SELECT *, 0.008 AS scale, (width * 5)/7 AS ox, (height / 2) AS oy FROM images WHERE id = 'mandelbrot'), - horizontal(x) AS - (SELECT width FROM image UNION ALL SELECT x - 1 FROM horizontal WHERE x > 1), - vertical(y) AS - (SELECT height FROM image UNION ALL SELECT y - 1 FROM vertical WHERE y > 1), - mando(i, px, py, cx, cy, x, y) AS ( - SELECT 0, 0.0, 0.0, - (SELECT (horizontal.x - ox)*scale FROM image), (SELECT (vertical.y - oy)*scale FROM image), - horizontal.x, vertical.y - FROM vertical, horizontal - UNION ALL - SELECT i + 1, px*px - py*py + cx, 2.0*px*py + cy, cx, cy, x, y FROM mando - WHERE (px*px + py*py) < 4.0 AND i < 20 - ), - mandogrouped(x, y, i) AS (SELECT x, y, max(i) FROM mando GROUP BY x, y), - colors(i, r, g, b) AS ( - SELECT 19, 255, 150, 150 UNION ALL - SELECT 10, 150, 120, 120 UNION ALL - SELECT 7, 50, 100, 100 UNION ALL - SELECT 0 , 0, 50, 50 - ), - _pixels(x, y, r, g, b) AS ( - SELECT x, y, c.r, c.g, c.b - FROM mandogrouped g - JOIN colors c ON c.i = (SELECT max(i) FROM colors WHERE i <= g.i) - ) -INSERT INTO pixels (image_id, x, y, r, g, b) SELECT 'mandelbrot', x, y, r, g, b FROM _pixels; |
