The tools in Phun allow you to change, interact with and create things in the simulation. Some of them have complicated controls, others are easy. Some work differently when paused than when running the simulation.

Contents 1 Sketch tool 2 Brush tool 3 Box tool 4 Circle tool 5 Plane tool 6 Chain tool 7 Spring tool 8 Fixate tool 9 Hinge tool 10 Pen tool 11 Drag tool 12 Scale tool

Sketch tool

The sketch tool is a freeform drawing tool, which allows for complicated shapes and a couple of functions.

The primary function is drawing polygons. Just draw anywhere on an empty space, and close the shape. Use shift to draw straight lines. You can mix using straight lines and normal drawing by pressing the shift key while drawing straight lines, and releasing it to draw a curve. Release and repress the shift key quickly to start a new straight section.

You can also draw inside and between objects, where certain commands can be done:

1. Draw a small circle to add a hinge, the bigger this circle the bigger the hinge.
2. Draw a zig-zag pattern to make a spring
3. Draw a line through an object to delete it
4. Draw a circle around an object or multiple objects to select them.
5. If you drag the background with your right mouse button, you can pan the view.

Brush tool

The brush tool is not the same as the sketch tool. Where the sketch tool is more used for drawing objects, the brush tool is also for making adaptations. If you draw on an empty space, it acts like the sketch tool by making shapes.

But it has a number of special actions:

• You can move shapes by dragging them with the left mouse button. If the simulation is running, it will drag them. If the simulation is paused, it will move them.
• If you hold the alt key and then try to move the shape, fixated or hinged objects will move without moving the rest.
• If you hold the control key and then try to move the shape, it makes a copy of the shape.
• With the right mouse button, you can rotate objects. Press the shift key for 15 degree increments.
• If you drag the background with your right mouse button, you can pan the view.

Box tool

The box tool can be used to draw boxes, squares and as a way of selecting objects. To draw squares, you need to press the shift key. Selecting things can be done by drawing a box that covers the objects you want to select.

Circle tool

The circle tool draws circles. It can't be used to select things, nor to create ellipses. Liability Insurance NY

Plane tool

The plane tool creates an infinite plane. You can use the shift key to rotate with 15 degree increments.

Chain tool

The chain tool is used to draw chains of circles. Normally it is a freehand drawing tool, but the shift-key makes it draw straight lines. To interrupt a straight line and start a new one, you have to let go of the shift key, move a tiny but with the mouse until your previously drawn line appears, and then press shift again and continue. When you start drawing near the edge of an object, it automatically clamps to that edge. If you end it near an edge, it does the same. If you start a chain on an empty patch, it connects a hinge to the background. But if you end it on an empty patch, it doesn't hinge the last link to anything.

Spring tool

The spring tool is pretty simple. It can only be used to draw straight springs at an object-object level, a background-object level, or an object-background level. Tools are always hinged, and cannot be fixated to anything.

Fixate tool

Another straight forward tool. Can be used to fixate an object to the underlying object, or to the background when there's no object underneath.

Hinge tool

Like the fixate, but with a hinge instead of a fixate. A hinge can also be assigned a motor by right-clicking the hinge. The motor can be set to be controlled with the keys of your keyboard, enabling you to make drivable cars etc.

Pen tool

The pen tool can be connected to objects, and leaves a fading trail behind when moved. The size, color and fade time of the pen t(r)ail can be set by right-clicking the created pen.

Drag tool

The drag tool is mainly used for dragging and moving objects. When the simulation is started, it will drag all objects that aren't fixated (fixated objects get moved). When the simulation is paused it moves objects. With the right mouse button you can rotate, and you can use shift to increment with 15 degrees.

When contraptions are fixated or hinged together, Phun will try to move the whole contraption when you drag it. If you only want to move one object, however, you can hold down ALT and then move the object. In general, holding down ALT will only select the geometry you are clicking on.

Scale tool

The scale tool is a very powerful tool. It allows you to rescale any object, including hinges and fixates. When you hover over objects, you get a scale box round it. When you click one object, you lock onto that object.

Holding down SHIFT will scale both axis equally, meaning circles will be kept as circles instead of being turned into ellipses.

Hodling down CTRL will scale in integer increments or integer fraction. This is useful for making things exactly twice as large or half as wide.