defold-2d-collisions-ne

I made this native extension for my sidescroller game in Defold game engine.

This extinsion work only with rects and circles.

Circles and rect can be rotated

This extinsion only find fact of collision. It not found normal, overlapped areas and etc.

Installation

You can use the extension in your own project by adding this project as a Defold library dependency. Open your game.project file and in the dependencies field under project add:

https://github.com/d954mas/defold-2d-collisions-ne/archive/master.zip

API - functions

The pivot point of shape is in center

Shape.new_rect(x, y, width, height)

Shape.new_circle(x,y,rad)

Complex shape is a container for other shapes

Shape.new_complex(x,y)

Return width and height for rect or rad for circle.

Shape.get_size()

Shape.get_position(shape)

Shape.set_position(shape,x,y)

Shape.get_rotation(shape)

Shape.set_rotation(shape,x,y)

Shape.get_scale(shape)

Shape.set_scale(shape,scale)

Bit masks and groups

M.PLAYER_GROUP = bit.tobit(1)
M.ENEMY_GROUP = bit.tobit(2)
M.COLLECTABLE_GROUP = bit.tobit(4)
M.PLAYER_BULLET_GROUP = bit.tobit(8)
M.PLAYER_LAZER_GROUP = bit.tobit(16)
M.ENEMY_BULLET_GROUP = bit.tobit(32)

--player only collide with enemy, collectable, and enemy_bullets
M.PLAYER_MASK = bit.bor(M.ENEMY_GROUP, M.COLLECTABLE_GROUP, M.ENEMY_BULLET_GROUP)

Shape.get_group(shape)

Shape.set_group(shape,group)

Shape.get_mask(shape)

Shape.set_mask(shape,mask)

Return 1 for rect, 2 for circle 3 for complex

Shape.get_type(shape)

Return x1,y1,x2,y2 (left bottom right top)

Shape.get_bbox(shape)

You can attach table as data for shape.

Shape.get_data(shape,data)

Shape.set_data(shape,data)

--remove from world and destroy

Shape.dispose(shape)

Only for complex shape

Shape.add_rect(shape,x,y,w,h,rotation)

Shape.add_circle(shape,x,y,rad)

--return array of shapes

Shape.get_childs(shape)

WORLD FUNCTIONS update all shapes(position, rotations and etc).

Shape.update()

Return all collisions. every collision object have fields

shape_1

shape_2

type(0-no collision, 1-left, 2-right, 3-all)It depends on mask and groups

Shape.collide()

Shape.remove(shape)

Shape.add(shape)

Return total shapes in world

Shape.get_shapes_size()