ImAnim

soufianekhiat/ImAnim: Animation Enginer for Dear ImGui

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Animation engine for Dear ImGui

ImAnim brings modern animation capabilities to ImGui applications. Write intuitive, UI animations with minimal code.

// Animate anything in one line
float alpha = iam_tween_float(id, channel, hovered ? 1.0f : 0.5f, 0.3f, ease, policy, dt);
  • instant-mode compatible – Works naturally with imgui’s paradigm
  • zero dependency – Only dear ImGui is required
  • big easy collection – 30+ intuitive functions including Spring Physics
  • conceptual color blending – oklab and oklch
  • Responsive Layout – Anchor-relative animations that survive window resize.

Social class capabilities
tween Color with float, vec2, vec4, int, crossfade/cut/cue policies
clips Timeline Keyframe, Looping, Callback, Chaining, Stagger
Easy quad to bounce preset, cubic-bezier, steps, spring physics
on the way of Bezier curves, Catmull-Rom splines, lessons with paths
reactive Oscillators, jitter, jitter, perlin/simplex noise
Excessive Style Interpolation, Scroll Animation, Debug Inspector 

#include "im_anim.h"

// Each frame
iam_update_begin_frame();
iam_clip_update(dt);

// Hover animation
bool hovered = ImGui::IsItemHovered();
float scale = iam_tween_float(
    ImGui::GetID("button"), ImHashStr("scale"),
    hovered ? 1.1f : 1.0f,
    0.15f,
    iam_ease_preset(iam_ease_out_back),
    iam_policy_crossfade,
    dt
);

Add two files to your project:

src/im_anim.h
src/im_anim.cpp

That’s it. No build system changes, no external dependencies.

In full documentation docs/ folder:

demo/ The folder includes a comprehensive demo showcasing all the features:

  • interactive easement curve visualizer
  • cubic bezier editor
  • spring physics playground
  • All animation types with live controls
  • performance criteria

imgui integration

imgui integration

Development is supported through Patreon:

patreon

MIT License – see License for details.

Created for the dear Imgui community



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