animpy 1.7.1

A simple terminal animation library

Animpy

Make cool terminal animations without the pain. Move text around, use RGB colors, play audio, and build actual animations. Works great on modern terminals.

Examples

Basic & Beginner

• Linear interpolation - Learn smooth value transitions with the lerp function
• Loading screen - Create a simple loading animation
• The zen of python - Animated text display with color effects

Visual Effects & Particles

• Particle simulation - Advanced particle system with bursts and velocity
• Collision example - Detect and handle text collisions

Interactive & Games

• Player Controls - Real-time keyboard input with movement and boundaries
• Tag game - Interactive tag game with collision detection
• Audio example - Load and play background music with effects

Install

pip install animpy

Quick Start

import animpy

scene = animpy.Scene()
text = animpy.Text("Hello!", 10, 5, r=255, g=100, b=50)
scene.add(text)
scene.render()

How It Works

Text – Create animated text:

text = animpy.Text("Hi", 0, 0, r=255, g=0, b=0)
text.moveX(10)  # Move right
text.moveY(5)   # Move down
text.centerX()  # Center horizontally
text.change_rgb_values(0, 255, 0)  # Change color
text.collides_with(other_text)  # Check collision with another text
text.on_collide_callback(other_text, callback)  # Set a callback for when it collides with another text
text.width, text.height  # Get dimensions
text.type_out("Type me!", speed=0.05, scene=scene)  # Type effect
text.fall(velocity=2, floor=15)  # Falling effect
text.change_frame()  # Cycle through frames (if you used a list)

Particle – Create and manage particles with velocities:

particle = animpy.Particle("💥", 10, 5, r=255, g=100, b=50, lifetime=3.0)
particle.burst(scene, count=20, speed=2.0)  # Emit burst of particles in all directions
particle.emit(scene)  # Emit a single particle
particle.change_rgb_values(0, 255, 0)  # Change particle color
particle.update_all(delta_time)  # Update all emitted particles
particle.is_dead()  # Check if all particles have expired
particle.velocity_x, particle.velocity_y  # Set particle velocity

EffectText – Text with built-in effects:

effect_text = animpy.EffectText("Shaky!", 10, 5)
effect_text.shake_text(intensity=1)  # Shake the text
effect_text.gravity_text(floor=15, gravity=0.5)  # Simulate gravity
effect_text.decaying_text(time=3.0, decay_rate=0.5)

Group – Group multiple texts together:

group = animpy.Group(text1, text2, text3)
group.add(text4)  # Add another text to the group
group.remove(text2)  # Remove text2 from the group
group.position(5, 0)  # Move the entire group right by 5
group.change_rgb_values(255, 0, 0)  # Change color of all items in group to red
group.change_rgb_values_one(text1, 0, 255, 0)  # Change color of a single item in group

Scene – Render everything:

scene = animpy.Scene()
scene.add(text1, text2, text3)
scene.remove(text2)  # Remove text2 from the scene
scene.render()
scene.update(delta_time)  # Update all particles in the scene
scene.set_bg_rgb(0, 0, 255)  # Set background color to blue
scene.clear()
scene.shake(intensity=2)  # Shake the scene
scene.dt  # Get time since last frame (for smooth movement)

Interactive Scene – Handle real-time input:

scene = animpy.InteractiveScene()
scene.add(text1, text2, text3)
scene.remove(text2)  # Remove text2 from the scene
scene.render()
scene.update(delta_time)  # Update all particles in the scene
scene.set_bg_rgb(0, 0, 255)  # Set background color to blue
scene.clear()
scene.shake(intensity=2)  # Shake the scene
scene.key_pressed("w")  # Check if 'w' is pressed
scene.dt  # Get time since last frame (for smooth movement)
scene.wall  # Get the x-coordinate of the right/left wall
scene.floor_ceiling  # Get the y-coordinate of the floor/ceiling
scene.mouse_pressed("left")  # Check if left mouse button is pressed
scene.mouse_position()  # Get current mouse position
scene.key_released("w")  # Check if 'w' was released since last update
scene.on_key_press_callback("w", callback)  # Set a callback for when 'w' is pressed
scene.on_key_release_callback("w", callback)  # Set a callback for when 'w' is released
scene.on_mouse_press_callback("left", callback)  # Set a callback for when left mouse button is pressed

Audio – Play sounds:

audio = animpy.Audio()
audio.load("bg", "music.mp3")
audio.play("bg", loop=-1)
audio.set_volume("bg", 0.5)  # Set volume to 50%
audio.stop("bg")  # Stop a specific audio track
audio.stop_all()  # Stop all audio
audio.is_playing("track")  # Check if audio is playing
audio.play_for_time("bg", duration=5.0)  # Play audio for a specific duration

Animpy (extras) – Some extra methods for animations:

animpy.lerp(start, end, t)  # Linear interpolation between start and end
animpy.hide_cursor()  # Hide the terminal cursor
animpy.show_cursor()  # Show the terminal cursor

Support the project

Version History

v1.7.0

• Added new EffectText class that extends Text with built-in support for various text effects like shaking, methods include:
  • gravity_text(floor, gravity) for simulating gravity with velocity and floor collision
  • shake_text(intensity) for shaking the text randomly within a certain intensity
  • decaying_text(time, decay_rate) for creating a text that fades out and disappears after a certain lifetime
• Added more mouse controls such as mouse_released(button) to check if a specific mouse button was released since the last update, and mouse_release_callback(button, callback) to set a callback function that triggers when a specific mouse button is released

v1.6.5

• Added six new methods to interactive scene:
  • mouse_pressed(button="left") to check if a specific mouse button is currently pressed
  • mouse_position() to get the current position of the mouse cursor
  • key_released(key) to check if a specific key was released since the last update
  • on_key_press_callback(key, callback) to set a callback function that triggers when a specific key is pressed
  • on_key_release_callback(key, callback) to set a callback function that triggers when a specific key is released
  • on_mouse_press_callback(button, callback) to set a callback function that triggers when a specific mouse button is pressed

v1.6.0

• Added new Particle class for creating particle effects with velocity and lifetime support
• Added burst() method to create particles that scatter in all directions with configurable speed
• Added emit() method to emit particles from a parent particle
• Added update_all() method to update all emitted particles
• Added is_dead() method to check if all particles have expired
• Added Scene.update() method to automatically update and remove expired particles
• Particles now support RGB color, velocity, and lifetime tracking
• Particles render individually and fade as they reach their lifetime
• Added new example for particle simulation
• Added two new methods to Group class: change_rgb_values_one() for changing color of a single item in the group, and position() for moving the entire group by a certain amount
• Added three new methods to Audio class: is_playing() to check if a specific audio track is currently playing, play_for_time() to play an audio track for a specific duration, and stop_all() to stop all currently playing audio tracks
• Added two new methods for the main namespace: hide_cursor()/show_cursor() for controlling the visibility of the terminal cursor during animations

v1.5.8

• Added exclusive floor, wall, and ceiling properties to InteractiveScene for better control over movement boundaries

v1.5.5

• Added new Group class for grouping multiple Text objects together and moving them as a unit
• Added collision detection method on_collide_callback to Text class for triggering callbacks when two Text objects collide

v1.5.1

• Added full guide to project folder

v1.5.0

• Added linear interpolation function lerp to animpy for smooth animations
• Added dt property to Scene for easy frame timing and smooth movement
• Added z-index support to Text for layering items in the scene
• Added scene shaking effect with shake method for dramatic animations

v1.4.5

• Added background color support to Scene with set_bg_rgb method

v1.4.1

• Added scene.remove method to remove items from the scene

v1.4.0

• Added three new examples to Github example folder
• Added new class InteractiveScene that allows for real-time keyboard input
• Added collision detection method collides_with to Text class

v1.3.8

• Added audio.is_playing() method to check if audio is currently playing
• Added two more examples to Github example folder

v1.3.5

• Added scene.clear method to clear the scene
• Added version history to README

Made with ❤️ by a human.