ConstDefault PIXI render options.
Default grid constants.
Predefined material presets for common physics behaviors
Readonlybouncy: { density: 0.5; friction: 0.1; restitution: 0.9 }Bouncy ball - high restitution, low friction
Readonlycharacter: { density: 1; fixedRotation: true; friction: 0.5; restitution: 0 }Character - no rotation, medium friction
Readonlyice: { density: 0.9; friction: 0.02; restitution: 0.05 }Ice - very low friction, low restitution
Readonlymetal: { density: 1.5; friction: 0.3; restitution: 0.1 }Metal object - high density, low restitution
Readonlyrubber: { density: 1; friction: 0.9; restitution: 0.7 }Rubber - high friction, high restitution
Readonlyterrain: { density: 0; friction: 0.6; restitution: 0 }Static terrain - no density (immovable), high friction
Readonlywood: { density: 0.7; friction: 0.4; restitution: 0.2 }Wooden box - medium density, medium friction
Convert grid units → pixels (default grid).
Convert pixels → grid units (default grid).
Default triple border (outer/middle/inner).