Add video/gif generation + add wavey example

1 files changed, 33 insertions, 0 deletions

diff --git a/src/wavey.sql b/src/wavey.sql
new file mode 100644
index 0000000..70da417
--- /dev/null
+++ b/src/wavey.sql
@@ -0,0 +1,33 @@
+INSERT OR REPLACE INTO videos (id, width, height, fps) VALUES ('wavey', 400, 400, 10) RETURNING id;
+
+WITH RECURSIVE
+  video AS (SELECT * FROM videos WHERE id = 'wavey'),
+  _frames(frame) AS (
+    SELECT 1 UNION ALL
+    SELECT frame + 1 FROM _frames, video WHERE frame < 50
+  )
+INSERT INTO images (id, width, height, frame, video_id) SELECT CONCAT('wavey/', frame), width, height, frame, 'wavey' FROM _frames, video;
+
+WITH RECURSIVE
+  video AS (SELECT * FROM videos WHERE id = 'wavey'),
+  horizontal(x) AS (SELECT width FROM video UNION ALL SELECT x - 1 FROM horizontal WHERE x > 1),
+  vertical(y) AS (SELECT height FROM video UNION ALL SELECT y - 1 FROM vertical WHERE y > 1),
+  _frames(id, frame) AS (SELECT id, frame FROM images WHERE video_id = (SELECT id FROM video)),
+  _pixels(frame_id, x, y, r, g, b) AS
+    (SELECT
+      frames_id,
+      x, y,
+      ROUND(100 * value),
+      ROUND(240 * value*value),
+      ROUND(255 * value)
+    FROM (SELECT *,
+        (CASE
+          WHEN SIN((x - 4.0*frame) / 20.0)*10.0 > y - 150 THEN 1.0
+          WHEN SIN((x - 0.5*frame) / 20.0)*10.0 > y - 200 THEN 0.75
+          WHEN SIN((x + 8.0*frame) / 20.0)*10.0 > y - 280 THEN 0.5
+          ELSE 0.3
+        END) AS value,
+        _frames.id AS frames_id
+      FROM vertical, horizontal, _frames)
+  )
+INSERT INTO pixels (image_id, x, y, r, g, b) SELECT frame_id, x, y, r, g, b FROM _pixels;