# Physics Material Settings test

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## Verify custom Physics Material Settings are disabled in unsupported regions

• eg. Morris on ADITI (12-08-2010)
• eg. they all default to 0.000

## consistency testing

• attempt to measure the min and max physical settings for a default box. how?
• Verify you are unable to change the settings to out of bounds values:
• Gravity [-1, 28]
• Friction [0, 255]
• Density [1 to 22587]
• Restitution [0, 1]
• Gravity == how fast it falls/how much downward force is applied to it.
• Make 2 physical boxes, set the gravity of one box to 10.
• Drop both boxes at the same time
• Verify the box with more gravity falls faster.
• Friction == sliding stickiness
• Make 2 physical boxes, set the friction of one box to 255.
• Drag each box on the ground with the Drag tool (ctrl-2)
• Verify the box with more friction rolls on the ground while the other tends to slide.
• Density should affect collisions with a denser object being affected less in a collision with a less dense object, all else being equal.
• mass = density * volume. That volume is the true volume of the shape.
• Measure the mass of an object by adding this script and touching the object: default{touch_start(integer total_number){llSay(0, "mass = "+(string)llGetMass());}}
• Double the density of the object.
• Measure the mass again an Verify it has doubled.
• Make 2 physical spheres, set the Density of one sphere to 22587.
• Make the spheres collide using the Drag tool (ctrl-2)
• Verify the sphere with less Density bounces off the sphere with the greater Density.
• higher Restitution is bouncier. ...though setting it to 0 is not recommended as you'll likely get penetrations
• Make a 5x5x0.5m box "platform"
• Make 2 physical spheres. Set the Restitution of one sphere to 1.0
• Drop both spheres onto the platform
• Verify the sphere with higher Restitution bounces higher.
• Verify the material presets (wood, glass, etc.) load the correct Physics Material Settings
• Stone
• Friction = 0.8
• Restitution = 0.4
• Metal
• Friction = 0.3
• Restitution = 0.4
• Glass
• Friction = 0.2
• Restitution = 0.7
• Wood
• Friction = 0.6
• Restitution = 0.5
• Flesh
• Friction = 0.9
• Restitution = 0.3
• Plastic
• Friction = 0.4
• Restitution = 0.7
• Rubber
• Friction = 0.9
• Restitution = 0.9
• Test the Override material option (when that UI is finished)

## exploit testing

• Play with restitution = 0
• Can individual prims in a linked set have different Physics settings? Yes.
• Attempt to cause exploit by dragging a mesh asset onto a mesh object.
• Attempt to cause exploit by dropping an attached mesh on the ground.
• What else?

• Any ideas?