Physics Material Settings test

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?

griefing concerns

• Any ideas?