Breve Historia De Casi Todo -

ORIGAMI SIMULATOR
breve historia de casi todo This app allows you to simulate how any origami crease pattern will fold. It may look a little different from what you typically think of as "origami" - rather than folding paper in a set of sequential steps, this simulation attempts to fold every crease simultaneously. It does this by iteratively solving for small displacements in the geometry of an initially flat sheet due to forces exerted by creases. You can read more about it in our paper:

Fast, Interactive Origami Simulation using GPU Computation by Amanda Ghassaei, Erik Demaine, and Neil Gershenfeld (7OSME)

All simulation methods were written from scratch and are executed in parallel in several GPU fragment shaders for fast performance. The solver extends work from the following sources:

Origami Folding: A Structural Engineering Approach by Mark Schenk and Simon D. Guest
Freeform Variations of Origami by Tomohiro Tachi

This app also uses the methods described in Simple Simulation of Curved Folds Based on Ruling-aware Triangulation to import curved crease patterns and pre-process them in a way that realistically simulates the bending between the creases. breve historia de casi todo

Originally built by Amanda Ghassaei as a final project for Geometric Folding Algorithms. Other contributors include Sasaki Kosuke, Erik Demaine, and others. Code available on Github. If you have interesting crease patterns that would make good demo files, please send them to me (Amanda) so I can add them to the Examples menu. My email address is on my website. Thanks!
Hace unos 200

Instructions:

breve historia de casi todo

Slide the Fold Percent slider to control the degree of folding of the pattern (100% is fully folded, 0% is unfolded, and -100% is fully folded with the opposite mountain/valley assignments).
Drag to rotate the model, scroll to zoom.
Import other patterns under the Examples menu.
Upload your own crease patterns in SVG or FOLD formats, following these instructions.
Export FOLD files or 3D models ( STL or OBJ ) of the folded state of your design ( File > Save Simulation as... ).

Visualize the internal strain of the origami as it folds using the Strain Visualization in the left menu of the Advanced Options.

If you are working from a computer connected to a VR headset and hand controllers, follow these instructions to use this app in an interactive virtual reality mode. (sorry I think this may be deprecated now!)

External Libraries:

All rendering and 3D interaction done with three.js
svgpath and path-data-polyfill helps with SVG path parsing
FOLD is used as the internal data structure, methods from the FOLD API used for SVG parsing
Arbitrary polygonal faces of imported geometry are triangulated using the Earcut Library and cdt2d
numeric.js for linear algebra operations
GIF and WebM video export uses CCapture

You can find additional information in our 7OSME paper and project website. If you have feedback about features you want to see in this app, please see this thread.

La vida en la Tierra se cree que surgió hace unos 3

Hace unos 200.000 años, en África, apareció una especie llamada Homo sapiens. Los humanos eran capaces de pensar, comunicarse y crear herramientas, lo que les permitió adaptarse a diferentes entornos y explotar recursos de manera más eficiente. Con el tiempo, los humanos desarrollaron sociedades complejas, lenguas, religiones y culturas.

La vida en la Tierra se cree que surgió hace unos 3.500 millones de años, en forma de microorganismos simples. Estos microorganismos, llamados procariotas, eran capaces de realizar procesos químicos básicos y se alimentaban de los recursos disponibles en el entorno. Con el tiempo, la vida se diversificó y se volvieron más complejos, dando lugar a organismos multicelulares.

La formación de las primeras estrellas y galaxias se produjo a través de la gravedad, que hizo que las partículas y los átomos se agruparan y se fusionaran. Estas primeras estrellas fueron gigantescas y brillantes, y su vida fue corta pero intensa. Cuando explotaron como supernovas, dispersaron elementos pesados por todo el universo, sentando las bases para la formación de nuevas estrellas y planetas.

En los últimos siglos, la humanidad ha experimentado un crecimiento exponencial en términos de población, tecnología y conocimiento. La Revolución Industrial trajo consigo avances en la producción, el transporte y la comunicación, lo que transformó la sociedad de manera radical. En el siglo XX, la humanidad llegó a la Luna, desarrolló la computadora y creó la Internet, lo que ha cambiado la forma en que vivimos, trabajamos y nos comunicamos.

La breve historia de casi todo es un viaje épico que nos lleva desde los orígenes del universo hasta la complejidad de la vida en la Tierra. Desde el Big Bang hasta la actualidad, han pasado miles de millones de años, y en ese tiempo, han ocurrido innumerables eventos que han dado forma al cosmos tal como lo conocemos. La historia del universo es un recordatorio de que somos parte de un todo mucho mayor, y que nuestra existencia es el resultado de una serie de procesos complejos y azarosos.

Hace unos 4.500 millones de años, en un rincón remoto de la galaxia de la Vía Láctea, se formó un planeta llamado Tierra. La Tierra primitiva era un lugar hostil, con temperaturas extremas y una atmósfera tóxica. Sin embargo, con el tiempo, la superficie del planeta se enfrió y se formaron los océanos, la atmósfera y la vida.

En última instancia, la breve historia de casi todo nos invita a reflexionar sobre nuestro lugar en el universo y nuestra responsabilidad para con el planeta y las generaciones futuras. Al entender mejor nuestra historia y nuestro lugar en el cosmos, podemos trabajar hacia un futuro más sostenible y próspero para todos.

SIMULATION SETTINGS

This app uses a compliant dynamic simulation method to solve for the geometry of an origami pattern at a given fold angle. The simulation sets up several types of constraints: distance constraints prevent the sheet from stretching or compressing, face constraints prevent the sheet from shearing, and angular constraints fold or flatten the sheet. Each of these constraints is weighted by a stiffness - the stiffer the constraint, the better it is enforced in the simulation.

Axial Stiffness is the stiffness of the distance constraints. Increasing axial stiffness will decrease the stretching/compression (strain) in the simulation, but it will also slow down the solver. Face Stiffness is the stiffness of the face constraints, which help the axial constraints prevent deformation of the sheet's surface between the creases.

Fold and facet stiffnesses correspond to two types of angular constraints. Fold Stiffness is the stiffness of the mountain and valley creases in the origami pattern. Facet Stiffness is the stiffness of the triangulated faces between creases in the pattern. Increasing facet stiffness causes the faces between creases to stay very flat as the origami is folded. As facet stiffness becomes very high, this simulation approaches a rigid origami simulation, and models the behavior of a rigid material (such as metal) when folded.

Internally, constraint stiffnesses are scaled by the length of the edge associated with that constraint to determine its geometric stiffness. For Axial constaints, stiffness is divided by length and for angular constraints, stiffness is multiplied by length.

Since this is a dynamic simulation, vertices of the origami move with some notion of acceleration and velocity. In order to keep the system stable and help it converge to a static solution, damping is applied to slow the motion of the vertices. The Damping slider allows you to control the amount of damping present in the simulation. Decreasing damping makes the simulation more "springy". It may be useful to temporarily turn down damping to help the simulation more quickly converge towards its static solution - especially for patterns that take a long time to curl.

A Numerical Integration technique is used to integrate acceleration into velocity and position for each time step of the simulation. Different integration techniques have different associated computational cost, error, and stability. This app allows you to choose between two different integration techniques: Euler Integration is the simplest type of numerical integration (first order) with large associated error, and Verlet Integration is a second order integration technique with lower error and better stability than Euler.