Little particle field, touch to pull the box towards you. Getting around 20 fps so for 1000 particles thats very good. Updated code:
--# AABB
--AABB.lua
--------------------------------------------------------------------------------------------------
--[[
The AABB namespace contains functions for working with AABBs (axis aligned bounding boxes)
an AABB is required (and output) in the table format like so:
{ x = Xpos, y = Ypos, w = Width, h = Height}
the x and y are taken from the lower left corner of the AABB
--]]
--------------------------------------------------------------------------------------------------
AABB={}
AABB.pointIn=function(aabb,p)
--determines weather a point is within an AABB
return (p.x > aabb.x and p.x < aabb.x + aabb.w and p.y > aabb.y and p.y < aabb.y + aabb.h)
end
AABB.query=function(aabb1,aabb2)
--do two AABBs overlap?
if aabb1.x>aabb2.x+aabb2.w or aabb2.x>aabb1.x+aabb1.w or
aabb1.y>aabb2.y+aabb2.h or aabb2.y>aabb1.y+aabb1.h then
return false
end
return true
end
AABB.getOverlap=function(aabb1,aabb2)
--get the AABB which is the overlap between two other AABBs
local x1=math.max(aabb1.x,aabb2.x)
local y1=math.max(aabb1.y,aabb2.y)
local x2=math.min(aabb1.x+aabb1.w,aabb2.x+aabb2.w)
local y2=math.min(aabb1.y+aabb1.h,aabb2.y+aabb2.h)
if x1<=x2 and y1<=y2 then
return {x=x1,y=y1,w=x2-x1,h=y2-y1}
end
return {x=0,y=0,w=0,h=0}
end
AABB.get=function(verts,pad)
--return an AABB from a list of vec2 points
--pad os the padding around the edge default is 0
local minX,minY,maxX,maxY
for k,v in ipairs(verts) do
minX=math.min(v.x,minX or v.x)
minY=math.min(v.y,minY or v.y)
maxX=math.max(v.x,maxX or v.x)
maxY=math.max(v.y,maxY or v.y)
end
local x,y,w,h
x,y=minX,minY
w=maxX-minX
h=maxY-minY
if pad then
x = x - pad
y = y - pad
w = w + pad*2
h = h + pad*2
end
return {x=x,y=y,w=w,h=h}
end
--# Main
-- Main
supportedOrientations(CurrentOrientation)
function setup()
player={x=WIDTH/2,y=HEIGHT/2,w=30,h=90}
vel = vec2()
rects={}
for i=1,1000 do
table.insert(rects,
{x=math.random(400,WIDTH),y=math.random(400,HEIGHT),w=math.random(15,20),h=math.random(15,20),cd = false,
vel = vec2(0,0)}
)
end
parameter.watch("math.floor(1/DeltaTime+0.5)")
print("tilt to move")
tch = nil
end
function touched(t)
tch = t
if t.state == ENDED then tch = nil end
end
function draw()
background(0)
noSmooth()
player.x = player.x + vel.x
player.y = player.y + vel.y
local pt = vec2(player.x+player.w/2,player.y+player.h/2)
if tch then
if vec2(player.x,player.y):dist(vec2(tch.x,tch.y))>10 then
vel = vel + (vec2(tch.x,tch.y)-pt):normalize()*2-vel/10
else
vel = vec2()
end
vel = vel*0.9
end
if pt.x<player.w/2 then
vel = vec2(math.abs(vel.x),vel.y)
end
if pt.x>WIDTH-player.w/2 then
vel = vec2(-math.abs(vel.x),vel.y)
end
if pt.y<player.h/2 then
vel = vec2(vel.x,math.abs(vel.y))
end
if pt.y>HEIGHT-player.h/2 then
vel = vec2(vel.x,-math.abs(vel.y))
end
local colliding=false
for i=1,#rects do
if AABB.query(player,rects[i]) then
local overlap = AABB.getOverlap(rects[i],player)
local overlap2 = overlap
--vec2(player.w,player.h):len()-pt:dist(vec2(rects[i].x,rects[i].y))
local ol = (vec2(rects[i].x,rects[i].y)-pt)
local oln = ol:normalize()
oln.x = player.w/2 - math.abs(ol.x)
oln.y = player.h/2 - math.abs(ol.y)
if overlap.w > overlap.h then overlap2.h = 0 else overlap2.w = 0 end
rects[i].vel = rects[i].vel*0.93
ol.x=ol.x*overlap2.h
ol.y=ol.y*overlap2.w
rects[i].vel = rects[i].vel + (ol):normalize()*ol:len()*0.006-rects[i].vel/3+vec2(vel.x*overlap2.h,vel.y*overlap2.w)*0.01
rects[i].x = rects[i].x + ol.x*0.02
rects[i].y = rects[i].y + ol.y*0.02
vel = vel-ol*0.0003
rects[i].cd = true
else
if rects[i].x<0 then
rects[i].vel = vec2(math.abs(rects[i].vel.x)+1,rects[i].vel.y)
end
if rects[i].x>WIDTH then
rects[i].vel = vec2(-math.abs(rects[i].vel.x)-1,rects[i].vel.y)
end
if rects[i].y<0 then
rects[i].vel = vec2(rects[i].vel.x,math.abs(rects[i].vel.y)+1)
end
if rects[i].y>HEIGHT then
rects[i].vel = vec2(rects[i].vel.x,-math.abs(rects[i].vel.y)-1)
end
rects[i].cd = false
end
rects[i].x=rects[i].x+rects[i].vel.x
rects[i].y=rects[i].y+rects[i].vel.y
rects[i].vel = rects[i].vel*0.97
end
rectMode(CORNER)
fill(255, 255, 255, 255)
rect(player.x,player.y,player.w,player.h)
for k,v in pairs(rects) do
if v.cd then fill(255,0,0)else fill(255)end
rect(v.x,v.y,v.w,v.h)
end
end
