diff options
Diffstat (limited to '')
| -rw-r--r-- | src/circle.sql | 7 | ||||
| -rw-r--r-- | src/gradient.sql | 5 | ||||
| -rw-r--r-- | src/mandelbrot.sql | 3 |
3 files changed, 6 insertions, 9 deletions
diff --git a/src/circle.sql b/src/circle.sql index 46874cc..c4ac18a 100644 --- a/src/circle.sql +++ b/src/circle.sql @@ -1,9 +1,8 @@ -DELETE FROM images WHERE id = 'circle'; -INSERT INTO images (id, width, height) VALUES ('circle', 200, 200) RETURNING id; +INSERT OR REPLACE INTO images (id, width, height) VALUES ('circle', 400, 400) RETURNING id; WITH RECURSIVE image AS (SELECT * FROM images WHERE id = 'circle'), - circle AS (SELECT width/2 AS cx, height/2 AS cy, 80 AS radius FROM image), + circle AS (SELECT width/2 AS cx, height/2 AS cy, 160 AS radius FROM image), horizontal(x) AS (SELECT width FROM image UNION ALL SELECT x - 1 FROM horizontal WHERE x > 1), vertical(y) AS @@ -11,7 +10,7 @@ WITH RECURSIVE _pixels(x, y, r, g, b) AS (SELECT x, y, 150, - 255 * MAX(0, MIN(1, (SELECT POW(x - cx, 2) + POW(y - cy, 2) - POW(radius, 2) FROM circle))), + 255 * MAX(0, MIN(1, (SELECT (x - cx)*(x - cx) + (y - cy)*(y - cy) - radius*radius FROM circle))), 150 FROM vertical, horizontal ) diff --git a/src/gradient.sql b/src/gradient.sql index f04cdad..4ad1820 100644 --- a/src/gradient.sql +++ b/src/gradient.sql @@ -1,5 +1,4 @@ -DELETE FROM images WHERE id = 'gradient'; -INSERT INTO images (id, width, height) VALUES ('gradient', 200, 200) RETURNING id; +INSERT OR REPLACE INTO images (id, width, height) VALUES ('gradient', 400, 400) RETURNING id; WITH RECURSIVE image AS (SELECT * FROM images WHERE id = 'gradient'), @@ -8,5 +7,5 @@ WITH RECURSIVE vertical(y) AS (SELECT height FROM image UNION ALL SELECT y - 1 FROM vertical WHERE y > 1), _pixels(x, y, r, g, b) AS - (SELECT x, y, mod(x, 255), mod(y, 255), 100 FROM vertical, horizontal) + (SELECT x, y, x*255/width, y*255/height, 100 FROM vertical, horizontal, image) INSERT INTO pixels (image_id, x, y, r, g, b) SELECT 'gradient', x, y, r, g, b FROM _pixels; diff --git a/src/mandelbrot.sql b/src/mandelbrot.sql index 1c25461..b83b751 100644 --- a/src/mandelbrot.sql +++ b/src/mandelbrot.sql @@ -1,5 +1,4 @@ -DELETE FROM images WHERE id = 'mandelbrot'; -INSERT INTO images (id, width, height) VALUES ('mandelbrot', 400, 400) RETURNING id; +INSERT OR REPLACE 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'), |