Collision

Following functions are exported by the collision.js module.

circleInCircle

Params

• x1 - center of first circle
• y1 - center of first circle
• r1 - radius of first circle
• x2 - center of second circle
• y2 - center of second circle
• r2 - radius of second circle

Example

Bottlecap.Collision.circleInCircle(0, 0, 50, 10, 10, 50); // returns true
Bottlecap.Collision.circleInCircle(0, 0, 50, 100, 100, 50); // returns false

pointInCircle

Params

• x1 - point's x coord
• y1 - point's y coord
• cx - center of circle
• cy - center of circle
• r - radius of circle

Example

Bottlecap.Collision.pointInCircle(20, 20, 10, 10, 50); // returns true
Bottlecap.Collision.pointInCircle(-190, -180, 10, 10, 50); // returns false

rectInRect

Params

• x1 - left of rect1
• y1 - top of rect1
• w1 - width of rect1
• h1 - height of rect1
• x2 - left of rect2
• y2 - top of rect2
• w2 - width of rect2
• h2 - height of rect2

Example

Bottlecap.Collision.rectInRect(0, 0, 100, 100, 50, 0, 100, 100); // true
Bottlecap.Collision.rectInRect(-500, 0, 100, 100, 50, 0, 100, 100); // false

pointInRect

Params

• x - point's x coord
• y - point's y coord
• rx - left of rect
• ry - top of rect
• rw - width of rect
• rh - height of rect

Example

Bottlecap.Collision.pointInRect(0, 0, 100, 100, 50, 0, 100, 100); // true
Bottlecap.Collision.pointInRect(-500, 0, 100, 100, 50, 0, 100, 100); // false

circleInRect

Params

• cx - center of circle
• cy - center of circle
• r - radius of circle
• rx - left of rect
• ry - top of rect
• rw - width of rect
• rh - height of rect

Example

Bottlecap.Collision.circleInRect(0, 0, 50, 0, 0, 100, 100); // returns true
Bottlecap.Collision.circleInRect(0, 0, 50, 300, 200, 100, 100); // returns false