Omnimaga: The Coders Of Tomorrow
Welcome, Guest. Please login or register.
 
Omnimaga: The Coders Of Tomorrow
19 June, 2013, 12:42:16 *
Welcome, Guest. Please login or register.

Login with username, password and session length
 
   home   news downloads projects tutorials misc forums rules new posts irc about Login Register  
+-OmnomIRC

You must Register, be logged in and have at least 40 posts to use this shout-box! If it still doesn't show up afterward, it might be that OmnomIRC is disabled for your group or under maintenance.

Note: You can also use an IRC client like mIRC, X-Chat or Mibbit to connect to an EFnet server and #omnimaga.

Pages: [1]   Go Down
  Print  
Author Topic: Chipmunk Physics -  (Read 812 times) Bookmark and Share
0 Members and 1 Guest are viewing this topic.
Jim Bauwens
Lua! Nspire! Linux!
Editor
LV10 31337 u53r (Next: 2000)
*
Offline Offline

Gender: Male
Last Login: Today at 11:19:08
Date Registered: 28 February, 2011, 22:32:12
Location: Belgium
Posts: 1736


Topic starter
Total Post Ratings: +180

View Profile WWW
« on: 26 July, 2012, 21:59:10 »
+1
Hi all.

3.2 integrates the Chipmunk physics engine with Lua bindings. This allows us create fun games with the physics.
However there is just one problem. It's pretty complex.
So here is some useful info if you want to start programming.

1. The API documentation for 3.2
Download it at http://education.ti.com/nspire/scripting-api .
It's a must have in order to find all the API function names (duh Tongue)

2. The online chipmunk docs
http://chipmunk-physics.net/release/Chipmunk-5.x/Chipmunk-5.3.4-Docs/
Even though it describes the C API, it shows how the concepts of the engine and how it's structured.
And most Lua functions have similar names to the C ones.
You will find yourself checking this resource often when you start programming with the engine Wink

3. A tutorial (although for the C API)
http://www.alexandre-gomes.com/articles/chipmunk/
This tutorial helps you understand the concepts and inner workings of the physics engine.

4. Example code (by me)
Spoiler for Basic start:


platform.apilevel = '2.0'
require 'physics'


LARGE=physics.misc.INFINITY()
ZERO =physics.Vect(0,0)
------------------
-- Space Object --
------------------

pSpace   = class()

function pSpace:init(gravity)
   self.space = physics.Space()
         :setGravity(physics.Vect(0, gravity))
         :setSleepTimeThreshold(.5)
         
   self.objects   = {}
end

function pSpace:step(n)
   self.space:step(n)
end

function pSpace:addObj(obj, x, y)
   obj.body:setPos(physics.Vect(x, y))
   self.space:addBody(obj.body)
   
   self.space:addShape(obj.shape)
   if obj.added then obj:added(self) end
   
   table.insert(self.objects, obj)
   return self
end

function pSpace:addTerrainObj(obj, x, y)
   obj.body:setPos(physics.Vect(x, y))
   --self.space:addBody(obj.body)
   
   for _, ss in ipairs(obj.segments) do
      self.space:addStaticShape(ss)
   end
   
   table.insert(self.objects, obj)
   return self
end

function pSpace:addStaticObj(obj, x, y)
   obj.body:setPos(physics.Vect(x, y))
   --self.space:addBody(obj.body)
   self.space:addStaticShape(obj.shape)
   
   table.insert(self.objects, obj)
   return self
end

function pSpace:paint(gc)
   for _, obj in ipairs(self.objects) do
      obj:paint(gc)
   end
end

----------------
-- Box Object --
----------------

pBox   = class()

function pBox:init(w,h,mass,color)
   self.h=h
   self.w=w
   self.mass=mass
   self.color=color
   
   self.verts = {
      physics.Vect(-w/2, -h/2),
      physics.Vect(-w/2,  h/2),
      physics.Vect(w/2 ,  h/2),
      physics.Vect(w/2 , -h/2)
   }  
   
   self.body   = physics.Body(1, 1)
   self.body:setMass(mass)
   self.body:setMoment(physics.misc.momentForPoly(mass, self.verts, ZERO))
   self.body:setVel(ZERO)
   
   self.shape = physics.PolyShape(self.body, self.verts, ZERO)

   self.shape:setRestitution(0.6)
   self.shape:setFriction(0.6)
end

function pBox:paint(gc)
   local coords   = self.shape:points()
   local polycoords   = {}
   for k, vert in ipairs(coords) do
      table.insert(polycoords, vert:x())
      table.insert(polycoords, vert:y())
   end   
   local x,y=coords[1]:x(),coords[1]:y()
   table.insert(polycoords, x)
   table.insert(polycoords, y)            

   gc:setColorRGB(self.color)
   gc:fillPolygon(polycoords)
   gc:setColorRGB(0,0,0)
   gc:drawPolyLine(polycoords)
end


-----------------
-- Ball Object --
-----------------

pBall   = class()

function pBall:init(r,mass,color)
   self.r=r
   self.mass=mass
   self.color=color
   
   self.body   = physics.Body(1, 1)
   self.body:setMass(mass)
   self.body:setMoment(physics.misc.momentForCircle(mass, 0, r, ZERO))
   self.body:setVel(ZERO)
   
   self.shape = physics.CircleShape(self.body, r, ZERO)

   self.shape:setRestitution(0.6)
   self.shape:setFriction(0.6)
   --[[
   self.segment = physics.SegmentShape(self.body, physics.Vect(0,-r), physics.Vect(0,0), 1)
    self.segment:setRestitution(0)
   self.segment:setFriction(0)
   --]]
end

function pBall:added(spaceObj)
   --spaceObj.space:addShape(self.segment)
end

function pBall:paint(gc)
   local pos=self.body:pos()
   local x, y = pos:x(), pos:y()
    local r = self.r
        
    gc:setColorRGB(self.color)                          
    gc:fillArc(x-r, y-r, 2*r+1, 2*r+1, 0, 360)
    gc:setColorRGB(0)
    gc:drawArc(x-r, y-r, 2*r, 2*r, 0, 360)
    
    local x2,y2
    local angle=self.body:angle()
    x2   = math.cos(angle)*self.r+x
    y2   = math.sin(angle)*self.r+y
    gc:drawLine(x,y,x2,y2)
end



------------------
-- Terrain code --
------------------

function getMidPoint(line)
    local xdif    = math.abs(line[3]-line[1])
    local ydif    = math.abs(line[4]-line[2])
    local x    = math.min(line[3], line[1]) + xdif/2
    local y    = math.min(line[4], line[2]) + ydif/2
    return x, y
end

function terrain(bline, range, roughness, tms)
    local lines    = {bline}
    local lines2    = {}

    local midX, midY

    for times=1, tms do
        for index, line in pairs(lines) do
            midX, midY    = getMidPoint(line)
            midY    = midY + math.random(-range, range)

            table.insert(lines2, {line[1], line[2], midX, midY})
            table.insert(lines2, {midX, midY, line[3], line[4]})
        end
        lines    = lines2
        lines2    = {}
        range    = range * (roughness*2^-roughness)
    end

    return lines
end

------------------------
-- Terrain to physics --
------------------------

pTerrain   = class()

function pTerrain:init(bline, range, roughness, times)
   self.lines    = terrain(bline, range, roughness, times)
   self.segments = {}

   self.mass   = LARGE
   self.body   = physics.Body(1, 1)
   self.body:setMass(self.mass)
   
   self.inertia   = 0
   
   local a, b, ss
   for index, line in ipairs(self.lines) do
        a   = physics.Vect(line[1], line[2])
        b   = physics.Vect(line[3], line[4])
        
        self.inertia   = self.inertia + physics.misc.momentForSegment(self.mass/#self.lines, a, b)
        ss   = physics.SegmentShape(self.body, a, b, 1)
        ss:setRestitution(0)
      ss:setFriction(1)
        table.insert(self.segments, ss)
    end

   self.body:setMoment(self.inertia)
   self.body:setVel(ZERO)
   
end

function pTerrain:paint(gc)
   local a,b
    for index, ss in ipairs(self.segments) do
      a = ss:a()
      b = ss:b()
        gc:drawLine(a:x(), a:y(), b:x(), b:y())
    end
end



function on.construction()
   space   = pSpace(9.Cool
   
   timer.start(0.01)
   count=0
   
   ter   = pTerrain({0,120,318,120}, 60, 0.6, 5)
   space:addTerrainObj(ter, 0,0)
   
   ball = pBall(10, 5, 0xaaffaa)
   space:addObj(ball, 160,10)
end


function physicsUpdate()
   space:step(0.1)

   count = count + 1
   if count == 2 then
      platform.window:invalidate()
      count = 1
   end   
end

py,px=100,160

function on.paint(gc)
   space:paint(gc)
   gc:fillRect(px, py, 4, 4)
end

kaction   = {up={0,-5}, down={0,5}, left={-5,0}, right={5,0}}
function on.arrowKey(key)
   px=px+kaction[nobbc][1]
   py=py+kaction[nobbc][2]
end

function on.enterKey()
   local box   = pBox(20, 20, 5, math.random(2^16))
   space:addObj(box, px, py)
end

function on.timer()
   physicsUpdate()
end


Spoiler for A bit more advanced (motors/springs/etc):


platform.apilevel = '2.0'
require 'physics'


LARGE=physics.misc.INFINITY()
ZERO =physics.Vect(0,0)
------------------
-- Space Object --
------------------

pSpace   = class()

function pSpace:init(gravity)
   self.space = physics.Space()
         :setGravity(physics.Vect(0, gravity))
         :setSleepTimeThreshold(.5)
         --:resizeActiveHash(30, 500)
   self.objects   = {}
end

function pSpace:step(n)
   self.space:step(n)
end

function pSpace:addObj(obj, x, y)
   obj.body:setPos(physics.Vect(x, y))
   self.space:addBody(obj.body)
   
   self.space:addShape(obj.shape)
   if obj.added then obj:added(self) end
   
   table.insert(self.objects, obj)
   return self
end

function pSpace:addTerrainObj(obj, x, y)
   obj.body:setPos(physics.Vect(x, y))
   --self.space:addBody(obj.body)
   
   for _, ss in ipairs(obj.segments) do
      self.space:addStaticShape(ss)
   end
   
   table.insert(self.objects, obj)
   return self
end

function pSpace:addStaticObj(obj, x, y)
   obj.body:setPos(physics.Vect(x, y))
   --self.space:addBody(obj.body)
   self.space:addStaticShape(obj.shape)
   
   table.insert(self.objects, obj)
   return self
end

function pSpace:addComplexObj(obj, x, y)
   for _, childObj in ipairs(obj.objects) do
      self:addObj(childObj.obj, x+childObj.x, y+childObj.y)
   end
   
   for _, constraint in ipairs(obj.constraints) do
      self.space:addConstraint(constraint)
   end   
   
   table.insert(self.objects, obj)
   return self   
end

function pSpace:paint(gc)
   for _, obj in ipairs(self.objects) do
      obj:paint(gc)
   end
end

----------------
-- Box Object --
----------------

pBox   = class()

function pBox:init(w, h, mass, color, f, e, group)
   self.h=h
   self.w=w
   self.mass=mass
   self.color=color
   
   self.verts = {
      physics.Vect(-w/2, -h/2),
      physics.Vect(-w/2,  h/2),
      physics.Vect(w/2 ,  h/2),
      physics.Vect(w/2 , -h/2)
   }  
   
   self.body   = physics.Body(1, 1)
   self.body:setMass(mass)
   self.body:setMoment(physics.misc.momentForPoly(mass, self.verts, ZERO))
   self.body:setVel(ZERO)
   
   self.shape = physics.PolyShape(self.body, self.verts, ZERO)

   self.shape:setRestitution(e or 0.6)
   self.shape:setFriction(f or 0.6)
   
   if group then self.shape:setGroup(group) end
end

function pBox:paint(gc)
   local coords   = self.shape:points()
   local polycoords   = {}
   for k, vert in ipairs(coords) do
      table.insert(polycoords, vert:x())
      table.insert(polycoords, vert:y())
   end   
   local x,y=coords[1]:x(),coords[1]:y()
   table.insert(polycoords, x)
   table.insert(polycoords, y)            

   gc:setColorRGB(self.color)
   gc:fillPolygon(polycoords)
   gc:setColorRGB(0,0,0)
   gc:drawPolyLine(polycoords)
end


-----------------
-- Ball Object --
-----------------

pBall   = class()

function pBall:init(r,mass,color, f, e, group)
   self.r=r
   self.mass=mass
   self.color=color
   
   self.body   = physics.Body(1, 1)
   self.body:setMass(mass)
   self.body:setMoment(physics.misc.momentForCircle(mass, 0, r, ZERO))
   self.body:setVel(ZERO)
   
   self.shape = physics.CircleShape(self.body, r, ZERO)

   self.shape:setRestitution(e or 0.6)
   self.shape:setFriction(f or 0.6)
   
   if group then self.shape:setGroup(group) end
end

function pBall:paint(gc)
   local pos=self.body:pos()
   local x, y = pos:x(), pos:y()
    local r = self.r
        
    gc:setColorRGB(self.color)                          
    gc:fillArc(x-r, y-r, 2*r+1, 2*r+1, 0, 360)
    gc:setColorRGB(0)
    gc:drawArc(x-r, y-r, 2*r, 2*r, 0, 360)
    
    local x2,y2
    local angle=self.body:angle()
    x2   = math.cos(angle)*self.r+x
    y2   = math.sin(angle)*self.r+y
    gc:drawLine(x,y,x2,y2)
end





pCar   = class()

function pCar:init()
   local group   = 5
   
   local wheelR   = 5   -- wheel Radius
   local wheelM   = 5   -- wheel Mass
   local wheelF   = 0.9   -- wheel Friction
   local wheelE   = 0.0   -- wheel Elasticity
   
   local chassisM   = 10   -- Chassis Mass
   local chassisW   = 24   -- Chassis Width
   local chassisH   = 10   -- Chassis Height
   local chassisF   = 0.7   -- Chassis Friction
   local chassisE   = 0.0   -- Chassis Elasticity
   
   self.wheel1   = pBall(wheelR, wheelM, 0x55CC55, wheelF, wheelE, group)
   self.wheel2   = pBall(wheelR, wheelM+8, 0x55CC55, wheelF, wheelE, group)
   
   self.chassis   = pBox(chassisW, chassisH, chassisM, 0x5555CC, chassisF, chassisE, group)
   
   self.joint1   = physics.GrooveJoint(self.chassis.body, self.wheel1.body, physics.Vect(-10, 5), physics.Vect(-10, 25), ZERO)
   self.joint2   = physics.GrooveJoint(self.chassis.body, self.wheel2.body, physics.Vect( 10, 5), physics.Vect( 10, 25), ZERO)
   
   self.spring1   = physics.DampedSpring(self.chassis.body, self.wheel1.body, physics.Vect(-10, 0), ZERO, 17, 10, 10)
   self.spring2   = physics.DampedSpring(self.chassis.body, self.wheel2.body, physics.Vect( 10, 0), ZERO, 17, 10, 10)
   
   self.Fmotor   = physics.SimpleMotor(self.chassis.body, self.wheel2.body, 0):setMaxForce(1000)
   self.Pmotor   = physics.SimpleMotor(self.chassis.body, self.wheel2.body, 0):setMaxForce(1000)
   self.gear   = physics.GearJoint(self.wheel1.body, self.wheel2.body, 0, 1)
   
   self.objects   = {
      {obj = self.wheel1 , x = -10 ,y = 7},
      {obj = self.wheel2 , x = 10  , y = 7},
      {obj = self.chassis, x = 0 ,y = -7},
   }
   
   self.constraints   = {self.joint1, self.joint2, self.spring1, self.spring2, self.Fmotor, self.Pmotor, self.gear}   
end

function pCar:paint(gc)
   self.wheel1:paint(gc)
   self.wheel2:paint(gc)
   self.chassis:paint(gc)
end






------------------
-- Terrain code --
------------------

function getMidPoint(line)
    local xdif    = math.abs(line[3]-line[1])
    local ydif    = math.abs(line[4]-line[2])
    local x    = math.min(line[3], line[1]) + xdif/2
    local y    = math.min(line[4], line[2]) + ydif/2
    return x, y
end

function terrain(bline, range, roughness, tms)
    local lines    = {bline}
    local lines2    = {}

    local midX, midY

    for times=1, tms do
        for index, line in pairs(lines) do
            midX, midY    = getMidPoint(line)
            midY    = midY + math.random(-range, range)

            table.insert(lines2, {line[1], line[2], midX, midY})
            table.insert(lines2, {midX, midY, line[3], line[4]})
        end
        lines    = lines2
        lines2    = {}
        range    = range * (roughness*2^-roughness)
    end

    return lines
end

------------------------
-- Terrain to physics --
------------------------

pTerrain   = class()

function pTerrain:init(bline, range, roughness, times)
   self.lines    = terrain(bline, range, roughness, times)
   self.segments = {}

   self.mass   = LARGE
   self.body   = physics.Body(1, 1)
   self.body:setMass(self.mass)
   
   self.inertia   = 0
   
   local a, b, ss
   for index, line in ipairs(self.lines) do
        a   = physics.Vect(line[1], line[2])
        b   = physics.Vect(line[3], line[4])
        
        self.inertia   = self.inertia + physics.misc.momentForSegment(self.mass/#self.lines, a, b)
        ss   = physics.SegmentShape(self.body, a, b, 1)
        ss:setRestitution(0)
      ss:setFriction(1)
        table.insert(self.segments, ss)
    end

   self.body:setMoment(self.inertia)
   self.body:setVel(ZERO)
   
end

function pTerrain:paint(gc)
   local a,b
    for index, ss in ipairs(self.segments) do
      a = ss:a()
      b = ss:b()
        gc:drawLine(a:x(), a:y(), b:x(), b:y())
    end
end













function on.construction()
   space   = pSpace(9.Cool
   
   timer.start(0.02)
   count=0
   
   --[[
   floor   = pBox(300, 20, LARGE, 0xCC5555, 0.9)
   space:addStaticObj(floor, 150, 200)
   --]]
   
   ter   = pTerrain({0,120,318,120}, 60, 0.6, 5)
   space:addTerrainObj(ter, 0,0)
   
   car   = pCar()
   space:addComplexObj(car, 50, 50)
end


function on.tabKey()
   car.Pmotor:setMaxForce(10000)
   car.Pmotor:setRate(car.Pmotor:rate()-0.3)
end

function on.escapeKey()
   car.Pmotor:setMaxForce(0)
   car.Pmotor:setRate(0)   
end

function physicsUpdate()
   space:step(0.1)

   count = count + 1
   if count == 2 then
      platform.window:invalidate()
      count = 1
   end   
end

py,px=100,160

function on.paint(gc)
   local f   = math.abs(car.Pmotor:rate())
   gc:drawString("Force: " .. f, 2, 2, "top")
   space:paint(gc)
   gc:fillRect(px, py, 4, 4)
end

kaction   = {up={0,-5}, down={0,5}, left={-5,0}, right={5,0}}
function on.arrowKey(key)
   px=px+kaction[nobbc][1]
   py=py+kaction[nobbc][2]
end

function on.enterKey()
   local box   = pBox(20, 20, 5, math.random(2^16))
   space:addObj(box, px, py)
end

function on.timer()
   physicsUpdate()
end


I spend some time making this code, so please take care of it  Wink

5. Take a look at other exisiting activities for the TI-Nspire that use the physics engine
http://education.ti.com/calculators/tisciencenspired/US/Activities/Detail?sa=5029&id=17888

And last but not least ...
Have fun !
« Last Edit: 01 August, 2012, 10:23:37 by jimbauwens » Logged


TI-Nspire projects of me:
nCreator | PCspire | Klondike Lua | LogoMagic | EEPro for the TI-Nspire | Pegs | General math definitions
leafy
Coder Of Tomorrow
LV10 31337 u53r (Next: 2000)
*
Offline Offline

Gender: Male
Last Login: Yesterday at 19:46:01
Date Registered: 26 December, 2010, 05:27:03
Location: the ninth circle of hell
Posts: 1555


Total Post Ratings: +372

View Profile WWW
« Reply #1 on: 26 July, 2012, 22:03:21 »
0
Wow, that's fantastic! I still find it amazing that Chipmunk can even run on a calculator, so this is all very cool stuff Cheesy I'm more familiar with Box2D myself, but I've heard that Chipmunk is better at handling large numbers of objects, so it should be interesting to see what people can come up with.
Logged
In-progress: Blastlabs, TMJO, qb?, VVVVVV?
Finished: Tag, Tap, MFQT, Nyan
Dead: Graviter
Jim Bauwens
Lua! Nspire! Linux!
Editor
LV10 31337 u53r (Next: 2000)
*
Offline Offline

Gender: Male
Last Login: Today at 11:19:08
Date Registered: 28 February, 2011, 22:32:12
Location: Belgium
Posts: 1736


Topic starter
Total Post Ratings: +180

View Profile WWW
« Reply #2 on: 26 July, 2012, 22:08:13 »
0
Yeah, it's indeed a very nice addition Smiley

However, don't expect super complex and graphically advanced games to be possible Tongue
It's still a calculator, and the Lua bindings are of course a bit slower than the C one. (This is why Ndless 3.2 will be awesome Cheesy).
But a (good functioning) Angry Birds clone should be possible.
« Last Edit: 26 July, 2012, 22:08:56 by jimbauwens » Logged


TI-Nspire projects of me:
nCreator | PCspire | Klondike Lua | LogoMagic | EEPro for the TI-Nspire | Pegs | General math definitions
3rik
LV3 Member (Next: 100)
***
Offline Offline

Gender: Male
Last Login: 02 April, 2013, 22:45:02
Date Registered: 09 August, 2011, 04:04:54
Location: Right over there.
Posts: 92


Total Post Ratings: +8

View Profile
« Reply #3 on: 26 July, 2012, 22:36:17 »
0
Thanks for gathering these resources!  Smiley


space = pSpace(9.8)

got turned into

space = pSpace(9.Cool

in your code.
Logged
Userbars
cyanophycean314
LV6 Super Member (Next: 500)
******
Offline Offline

Gender: Male
Last Login: 03 May, 2013, 19:28:34
Date Registered: 07 December, 2011, 02:44:32
Location: Somewhere?
Posts: 363


Total Post Ratings: +42

View Profile
« Reply #4 on: 26 July, 2012, 23:44:40 »
0
I'm not sure if I'm going to give this a try in my programs, but it is interesting.

Quote from: 3rik on 26 July, 2012, 22:36:17
Thanks for gathering these resources!  Smiley


space = pSpace(9.8)

got turned into

space = pSpace(9.Cool

in your code.

Yeah, I saw that.  Cool
Logged
Programs (Nspire Lua)
Hangman | Checkers | Rush Hour | Base Converter | Flashlight, Mempi, and Strategy Steps | Jumper | Scramble/Boggle
Nick
LV9 Veteran (Next: 1337)
*********
Offline Offline

Gender: Male
Last Login: 28 May, 2013, 18:19:14
Date Registered: 05 June, 2011, 20:01:07
Location: 51° 12′ 34″ N, 3° 13′ 31″ E
Posts: 1179


Total Post Ratings: +158

View Profile WWW
« Reply #5 on: 07 January, 2013, 13:21:53 »
0
So, I looked into the documentation, and could not find any sign of liquidsimulation. Is this present in the physics lib or not?
It's sad to see that noone has made a game with it yet, someone should try this out Smiley
Logged
Levak
LV8 Addict (Next: 1000)
********
Online Online

Gender: Male
Last Login: Today at 12:19:37
Date Registered: 04 April, 2010, 23:42:49
Location: France
Posts: 858


Total Post Ratings: +150

View Profile WWW
« Reply #6 on: 07 January, 2013, 13:43:19 »
0
Quote from: Nick on 07 January, 2013, 13:21:53
So, I looked into the documentation, and could not find any sign of liquidsimulation. Is this present in the physics lib or not?
It's sad to see that noone has made a game with it yet, someone should try this out Smiley
It is so laggy that you could not make any complex nor simple game with it.
Adriweb, Jim and me tried the basic samples of Chipmunk demo. None of them can run smoothly on the handheld. It seems TI Enginners are only taking care of the PC version witch is a shame.
Sad to say but better recode it your own physic engine...
« Last Edit: 07 January, 2013, 13:43:31 by Levak » Logged
Human always wants to survive and that's why he will fall one day.
My website - TI-Planet - iNspired-Lua
Nick
LV9 Veteran (Next: 1337)
*********
Offline Offline

Gender: Male
Last Login: 28 May, 2013, 18:19:14
Date Registered: 05 June, 2011, 20:01:07
Location: 51° 12′ 34″ N, 3° 13′ 31″ E
Posts: 1179


Total Post Ratings: +158

View Profile WWW
« Reply #7 on: 07 January, 2013, 14:26:25 »
0
hmm, thanks for that fast reply Smiley

well, that's sad indeed.. Isn't there any speed improvement with the non-physics Lua on the handheld? (I haven't upgraded, and I won't)
That might be an idea, I guess a Lua physics engine would run smoother then, but that's a massive amount of work, especially the colission detection, how do you even do that with polygons?
Logged
Augs
LV5 Advanced (Next: 300)
*****
Offline Offline

Gender: Male
Last Login: Yesterday at 21:47:48
Date Registered: 11 July, 2012, 18:29:00
Location: UK
Posts: 298


Total Post Ratings: 0

View Profile
« Reply #8 on: 07 January, 2013, 21:37:14 »
0
Sounds interesting, any one have a video?
Logged
ElementCoder
LV6 Super Member (Next: 500)
******
Offline Offline

Gender: Male
Last Login: Today at 11:58:11
Date Registered: 22 May, 2011, 17:28:58
Location: Netherlands, Drachten
Posts: 430


Total Post Ratings: +26

View Profile
« Reply #9 on: 08 January, 2013, 17:55:21 »
0
@Nick My eat nethams game seems to run somewhat faster on 3.2 than it did on 3.1. The lobsters definitely fall smoother when setting it to the 100% spawn rate. It's not much of an improvement, but to me it seems to be something like 5-10%. It also could be I'm just imagining it, sadly I do not own 2 CXes so I can't test :p
Logged
Calculators owned: TI-Nspire ClickPad (no batteries though Tongue); TI-Nspire CX
Known languages: TI BASIC (Nspire); Java; Lua; C++
Spoiler for Random stuff:

NerdTests.com says I'm a Nerd God.  Click here to take the Nerd Test, get nerdy images and jokes, and write on the nerd forum!


Omni search is down, use http://megapowers.net/v/search.htm instead.
Nick
LV9 Veteran (Next: 1337)
*********
Offline Offline

Gender: Male
Last Login: 28 May, 2013, 18:19:14
Date Registered: 05 June, 2011, 20:01:07
Location: 51° 12′ 34″ N, 3° 13′ 31″ E
Posts: 1179


Total Post Ratings: +158

View Profile WWW
« Reply #10 on: 08 January, 2013, 19:09:09 »
0
Quote from: Augs on 07 January, 2013, 21:37:14
Sounds interesting, any one have a video?
A video of the chipmunk engine? Well, if you have the student software a handheld, you could try the code Jim posted above (they're really nice tbh)

Quote from: ElementCoder on 08 January, 2013, 17:55:21
@Nick My eat nethams game seems to run somewhat faster on 3.2 than it did on 3.1. The lobsters definitely fall smoother when setting it to the 100% spawn rate. It's not much of an improvement, but to me it seems to be something like 5-10%. It also could be I'm just imagining it, sadly I do not own 2 CXes so I can't test :p
That's what I hoped, that it would be faster, but still Shocked pff, I guess we could never expect it to be superlightningthunderboltfast, but at least a little afster than now xs but yeah, any improvement is nice..
Logged
Rhombicuboctahedron
LV6 Super Member (Next: 500)
******
Offline Offline

Gender: Male
Last Login: 13 June, 2013, 04:39:46
Date Registered: 11 October, 2012, 04:11:39
Location: Texas
Posts: 437


Total Post Ratings: +36

View Profile
« Reply #11 on: 09 January, 2013, 02:55:43 »
0
Quote from: Nick on 08 January, 2013, 19:09:09
Quote from: Augs on 07 January, 2013, 21:37:14
Sounds interesting, any one have a video?
A video of the chipmunk engine? Well, if you have the student software a handheld, you could try the code Jim posted above (they're really nice tbh)

Or watch this
Logged
Pages: [1]   Go Up
  Print  
 
Jump to:  

Powered by EzPortal
Powered by MySQL Powered by SMF 1.1.18 | SMF © 2013, Simple Machines Powered by PHP
Page created in 0.678 seconds with 30 queries.
Skin by DJ Omnimaga edited from SMF default theme with the help of tr1p1ea.
All programs, games and songs avaliable on this website are property of their respective owners.
Best viewed in Opera, Firefox, Chrome and Safari with a resolution of 1024x768 or above.