Graphics for Pythoneers

Explore Python's turtle graphics to build professional simulations and reusable models on 2d and 3d canvases, using graphical frameworks, Cartesian planes, and callback functions to capture user input.

Master input processing for turtle graphics, handling text and floating-point input, none on cancel, implement a calculator with plus, minus, multiply, divide, quitting on zero or q, and display result.

Build a Python turtle graphics calculator by using a turtle dot by function, a title font, looping to refresh the screen, reading two inputs, and evaluating an expression with eval.

Alias turtle as robot to draw rectangles using go to, left, and right with extents; set pen and fill colors with begin_fill and end_fill for reusable field rects.

Learn how to manage turtle graphics input using text and numeric prompts, set defaults, handle none values, and draw filled shapes by restoring state, applying colors, and drawing a rectangle.

Define boxer class to manage on-click shapes in Python's turtle graphics, establishing defaults for pen color, fill color, and pen size 3 with a 100 box size, and draw boxes.

Extend turtle graphics beyond simple shapes using a vector-based shape class to draw arbitrary polygons and circles with begin fill and end fill.

Build a state saver for the turtle, preserving position, foreground color, and background color, by duplicating state.pi into a stack, updating imports and class name, and testing push and pop.

Explore best patterns and pattern practices for turtle graphics by designing a miniature framework that uses a single function, parameter dictionary, and callbacks within a model-view-controller approach to draw shapes.

Discover how python's turtle graphics can be turned into printable 3d objects via cura and openscad, share on thingiverse, and explore affordable 3d printing with simple lab exercises.

Develop a data-driven turtle graphics framework that draws squares, circles, and other shapes by parameter changes, enabling easy reuse with generators and state saving.

Explore turtle graphics to manage 2D updates for 3D printing, drawing circles and rectangles, controlling pen color, width, and fill, and using Unicode symbols to create coins and chess pieces.

Load bitmaps such as png, gif, and jpg and render them in a wysiwyg, dot-for-dot view, while setting background color and window size first for accurate scaling.

Explore turtle graphics to draw circles and convert them into polygons by adjusting radius, extent, and steps, demonstrating how arc degrees map to line segments.

Configure the turtle screen and pen, set a fixed radius and 360-degree divisions to draw polygons from triangles to octagons with alternating colors, spacing shapes by the diameter.

Learn dynamic circle drawing with on-the-fly size changes, heading control, and incremental pen width for evolving patterns. Reuse prior work to integrate a 360-degree draw circle routine into existing frameworks.

Explore a turtle-based test driver that uses an enumerator to draw circles, color by dictionary values, adjust pen size, and position via angles for partial shapes.

Explore turtle graphics to track headings and distances, preserve circle points, and report distance from home in the console. Practice 45-degree steps to draw a circular pattern.

Explore alternate color representation by applying hex codes for red, green, and blue to generate the circle pattern in lab poly five, while adjusting the range for an extra point.

Explore turtle graphics by mapping circle degrees to customizable steps, including 360 degrees to 100 steps, while expressing angles in radians with math.pi and 25%, 50%, 75%, and 100% portions.

Apply a phased, agile research process to evolve turtle graphics for drawing circles with variable degrees per slice, from 360 to 100, using quartile representations.

Learn how world coordinates in turtle graphics let you zoom and skew drawings by adjusting the lower left and upper right coordinates.

Upgrade turtle graphics by configuring a dyme-based world with screen size, viewport, and world coordinates, then apply skew, aspect ratios, and timed renders for flexible, recordable views.

Explore Python's turtle graphics by undoing drawn operations with an undo buffer. Set a ten-entry limit, draw shapes, and iterate buffer entries to undo actions and inspect steps.

Investigate undo buffers in Python's Turtle Graphics by testing 300 and 1000 points to reveal how many rendering iterations—736 in this case—are stored for real-time drawing.

Explore modeling and simulation with Python's Turtle graphics, covering cartesian planes, vector graphics, shapes, user input, fonts, frameworks, and 3D model techniques for transforming, event handling, and timer-based simulations.

Explore five ways to manage shapes in Python's turtle graphics, including predefined default shapes, user-defined shapes, active shapes, undo history, and size and resize modes.

Learn to assign and stamp turtle shapes using a default or registered shape registry, adjust size and colors, and manage stamped objects with IDs and clear stamp operations.

Demonstrate managing times and shapes in turtle graphics by stamping named shapes, delaying with sleep, and clearing them via their IDs to animate circles and squares.

Register external images as turtle shapes using a gif file like myimage.gif in the shape registry and stamp them; bitmaps cannot rotate or auto-scale, so use point-based shapes for flexibility.

Master framework integration by registering only gif shapes, using a target class to count callbacks, and drawing a turtle from a data array, with stars as a bonus.

Enumerate points for reusable shapes like the star and inner circle, register them by shape name, and draw scalable turtles by unpacking a size tuple into three parameters.

Merge multiple polygons into a compound shape with the turtle shape class, register it, and stamp varied sizes to demonstrate complex shape registration and manipulation.

Learn to register color-named turtle shapes and draw red, blue, green, and yellow diamonds using size and position data, with a flight recorder to create complex polygons.

Explore turtle graphics and a polygraph recording routine to construct polygons and circles from points, starting and ending at the origin. Zooming reveals more complex shapes and skewed patterns.

Explore tilt and set tilt angle in turtle graphics, comparing additive tilts with absolute tilts. Learn how aliases and the shape registry support stamping and transformations for animations.

Define a coin shape in turtle graphics using absolute positioning and size, stamp a data-driven pattern with a framework, and compare tilt angle while noting speed trade-offs and GitHub code.

Explore applying shear factors and shape transforms in turtle graphics, and understand how the shape transform matrix controls x and y skew, symmetry, and exceptions.

Explore turtle graphics shape transformations using six-sided symmetry, positive and negative transforms, and circular transforms, while observing how head of the turtle and pen settings drive rendering.

Explore how turtle graphics handles events using the Hollywood model, registering keyboard and mouse callbacks to control the screen, colors, and shapes in an interactive demo.

Learn how to implement an on key class that manages colors and shapes, registers callbacks, and handles toggle, color cycling, zoom, and quit with bounds checks to prevent overflow.

Master mouse motion and events in Python's turtle graphics by implementing callback signatures, onClick and onDrag handlers, and button mappings, with coordinate translation and stamping shapes.

Explore managing multiple turtle instances, each with unique properties, by inheriting from a base turtle and using per-instance onClick events to change color, shape, fill, and direction, plus identity.

Master visual testing with a test driver and setup that customizes turtle colors, shapes, and onClick events, then explore z order and hit testing.

Learn to implement on-timer callbacks in the turtle graphics framework, schedule and cancel with milliseconds (t=0 to cancel), and build a one-second heartbeat clock for time-based animations.

Explore a turtle graphics clock model that animates a red active dot on a gray clock face, recoloring prior positions and using a Clocker class with timer-driven ticks.

Apply turtle graphics to real-world gear modeling, animation, and simulation, exploring pinwheel and spike gears, 2D patterns, and timer-driven motion for practical design.

Explore how two spiked gears synchronize around a fixed center of rotation by adjusting the intergear spire length in a Python turtle gear motion simulator.

Reuse an external shape data file to drive two turtles with spike gear shapes, using two shapes and adjusting distance to enable coexistence and create a polygon-based antique clock wiggle.