Skip to content

Allows tilt and wobble control, solving issue #244 #250

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
QGRRK wants to merge 1 commit into
base: master
Choose a base branch
from
Open

Allows tilt and wobble control, solving issue #244 #250

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
35 changes: 30 additions & 5 deletions src/confetti.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -246,7 +246,12 @@
],
// probably should be true, but back-compat
disableForReducedMotion: false,
scalar: 1
scalar: 1,
/* New feature 3-D wobble/tilt control */
tiltRange: [-Math.PI * 0.5, Math.PI * 0.5], // [min,max] radians
Copy link
Copy Markdown

@puffcocos puffcocos Dec 10, 2025

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

The original canvas-confetti tiltAngle calculation logic:

tiltAngle: (Math.random() * (0.75 - 0.25) + 0.25) * Math.PI
// Result: 0.25π ~ 0.75π (45° ~ 135°)

The current PR's default value is -90° ~ 90°, but to maintain the original behavior, I think it should be 45° ~ 135°.

Suggestion:

tiltRange: [Math.PI * 0.25, Math.PI * 0.75]

tiltSpeed: [0.05, 0.40], // radians per frame
wobbleRange:[0,10], // “radius” units
wobbleSpeed:[0.05,0.11] // per-frame
};

function convert(val, transform) {
Expand Down Expand Up @@ -342,8 +347,13 @@
return {
x: opts.x,
y: opts.y,
wobble: Math.random() * 10,
wobbleSpeed: Math.min(0.11, Math.random() * 0.1 + 0.05),
//New 3-D wobble/tilt control
wobble: Math.random() * (opts.wobbleRange[1] - opts.wobbleRange[0]) + opts.wobbleRange[0],
wobbleSpeed: Math.random() * (opts.wobbleSpeed[1] - opts.wobbleSpeed[0]) + opts.wobbleSpeed[0],
tiltAngle: Math.random() * (opts.tiltRange[1] - opts.tiltRange[0]) + opts.tiltRange[0],
tiltIncrement: Math.random() * (opts.tiltSpeed[1] - opts.tiltSpeed[0]) + opts.tiltSpeed[0],
//wobble: Math.random() * 10,
//wobbleSpeed: Math.min(0.11, Math.random() * 0.1 + 0.05),
velocity: (opts.startVelocity * 0.5) + (Math.random() * opts.startVelocity),
angle2D: -radAngle + ((0.5 * radSpread) - (Math.random() * radSpread)),
tiltAngle: (Math.random() * (0.75 - 0.25) + 0.25) * Math.PI,
Copy link
Copy Markdown

@puffcocos puffcocos Dec 10, 2025

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

It seems like this line might override the new tiltAngle.

Expand Down Expand Up @@ -378,12 +388,15 @@
fetti.tiltSin = 0;
fetti.tiltCos = 0;
fetti.random = 1;
// New 3-d wobble/tilt control
fetti.tiltIncrement = 0;
} else {
fetti.wobble += fetti.wobbleSpeed;
fetti.wobbleX = fetti.x + ((10 * fetti.scalar) * Math.cos(fetti.wobble));
fetti.wobbleY = fetti.y + ((10 * fetti.scalar) * Math.sin(fetti.wobble));

fetti.tiltAngle += 0.1;
//fetti.tiltAngle += 0.1;
fetti.tiltAngle += (fetti.tiltIncrement || 0.1);
fetti.tiltSin = Math.sin(fetti.tiltAngle);
fetti.tiltCos = Math.cos(fetti.tiltAngle);
fetti.random = Math.random() + 2;
Expand Down Expand Up @@ -569,6 +582,13 @@
var shapes = prop(options, 'shapes');
var scalar = prop(options, 'scalar');
var flat = !!prop(options, 'flat');

// NEW 3-D wobble/tilt control
var tiltRange = prop(options, 'tiltRange');
var tiltSpeed = prop(options, 'tiltSpeed');
var wobbleRange = prop(options, 'wobbleRange');
var wobbleSpeed = prop(options, 'wobbleSpeed');

var origin = getOrigin(options);

var temp = particleCount;
Expand All @@ -592,7 +612,12 @@
gravity: gravity,
drift: drift,
scalar: scalar,
flat: flat
flat: flat,
// NEW 3-D wobble/tilt control
tiltRange: tiltRange,
tiltSpeed: tiltSpeed,
wobbleRange: wobbleRange,
wobbleSpeed: wobbleSpeed
})
);
}
Expand Down