Blender 3D Mobile Plane Animation and Collision Test

Showing how to make plane moving and run it on Android and iOS.

1.model the propeller

2. add rotation to propeller in game logic

3. apply scale before testing on ogrekit, otherwise model will be out of scale

4.move plane to start point

5.using time line to add key frames

6. add the animation to plane in game logic

7. fine tune plane locations in graph editor

9. test animation on pc

10. change planes to rigid body physics

11. using box as collision bounds

12. Test on PC

13. Test on Android

14. Test on ipad

Blender 3D Mobile Enemy Plane Modelling & UV Map

Showing how to Model and UV Map a bit complicated plane for running on iOS, Android Devices using Bender 3d with Gamekit.

1. Insert your design as blender3D back ground

2. Create wing using box. Put mirror modifier. Then extrude the side face. Adjust nods on the way to form the shade. Finalize mirror modifier when finishes.

3. Create a cylinder and use extrude scale on the way to create fuselage and engines.

4. Repeat to do the back wing, join components together and give it name

5. Now to unwrap the model for texturing. Go to side ortho view and press 'B' to box select the under side half of the plane. Remove Top of wing faces from selection by Press 'Shift' and mouse right button.

6. Change to top view. Then click unwrap and use project from view.

7. Move the UV map for giving spaces for other parts' uv map.

8. Unwrap other parts of the plane

9. Overlap 2 sides of rudder for easier texturing in future.

10. export the uv map. open in Gimp2 or PhotoShop, paint plane skin

11. load image into Blender3d Texture. and Set the coordination as UV.

12. Select shadeless, for constant colouring.

13. Testing on Android and iOS, Check my other post / youtube for how to do this.

Blender3D GameKit Lua Plane Top Bottom Constraint

The top bottom constraint is a bit tricky. As camera keeps moving with plane. I used camera as a reference to calcuate the top and bottom screen edge.
1. Get camera position
2. Calculate current top edge Y location
3. Calculate current bottom edge Y location
4. Compare with current plane location, and return signals, -1 as plane too low, 1 as plane too high, 0 for plane inside the screen
5. feed the signal and mouse movement to function edgeMoveFilter, which only permit plane move toward centre if it is on edge
The code is below and red marks are comments.
******Oninit.lua****************

    --Global variable

    --set touch move parameters

    Sensitivity = 0.005

    --invert = -1 -> is inverted

    Invert = 1

    Threshold=3.5

 -- Plane Contrain

    Xmin = -0.87

    Xmax = 0.87

 -- Plane Top Bottom Constrain

    Ymin = -1.50

    Ymax = 1.30

--filter movement so plane will only move towards center if touchs edge

function edgeMoveFilter(limitSignal,oldX)

    if limitSignal == -1 and oldX > 0 then

        return oldX

    elseif limitSignal == -1 and oldX < 0 then

        return 0

    elseif limitSignal == 1 and oldX >0 then

        return 0

    elseif limitSignal ==1 and oldX <0 then

        return oldX

    end

        return 0

end   

--check if over boundary on Y axis

function YoverLimit(obj,cameraObj)

    local vec3 = obj:getPosition()

    local cameraV = cameraObj:getLinearVelocity()

    --get camero position

    local cameraP = cameraObj:getPosition()

    --calculate bottom edge ;ocation

    local nextYmin = cameraP.y+Ymin

    --calculate top edge location

    local nextYmax = cameraP.y+Ymax

    --check whether plane is on edge and return signals

    if vec3.y < nextYmin then

        return -1

    elseif vec3.y > nextYmax then

        return 1

    else 

        return 0

    end

end

--endNew-----------

function XoverLimit(obj)

    local vec3 = obj:getPosition()

    if vec3.x < Xmin then

        return -1

    elseif vec3.x > Xmax then

        return 1

    else

        return 0

    end

end

function printPosition(obj)

    local vec3 = obj:getPosition()

    dPrintf("position x: " .. vec3.x)

    dPrintf("position y: " .. vec3.y)

    dPrintf("position z: " .. vec3.z)

    

end    

function velocityCap(v,vmax)

    if (v>vmax) then

        return vmax

    elseif (v < -vmax) then

        return -vmax

    else return v

    end

end

******planeTouchMove.lua****************  

mouse=OgreKit.Mouse()

scene = OgreKit.getActiveScene()

play = scene:getObject("plane")

--new--get camera objcet

camera = scene:getObject("Camera")

--end new---------------------------

logicM = OgreKit.LogicManager()

myLogicObject = logicM:getObject("plane")

mySensor = myLogicObject:getSensor("Collision")

maxVelocity=0.08

mouse:capture()

--print current plane posistion on screen

--printPosition(play)

--using threshold to filter out unwanted small touch movement

if ((mouse.xrel>Threshold or mouse.xrel<-Threshold)or(mouse.yrel>Threshold or mouse.yrel<-Threshold)and (not(play.touchBoundary))) then

      velocityY=velocityCap((mouse.yrel) * Sensitivity, maxVelocity)

      velocityX=velocityCap((mouse.xrel) * Sensitivity, maxVelocity) 

      --new----------------------

      --check if plane over screen boundary 

      limitSignalX = XoverLimit(play)

      limitSignalY = YoverLimit(play,camera)

      --the X Y directions are swap as the screen is in landscape

      if limitSignalX==0  and limitSignalY == 0 then

      --when plane is inside boundary

        play:translate(-velocityY* Invert,-velocityX * Invert,0)

      else

      --when plane touches boundary it can only move away from boundrary

        newY = edgeMoveFilter(limitSignalX,-velocityY * Invert)

        newX = edgeMoveFilter(limitSignalY,-velocityX * Invert)

        play:translate(newY,newX,0)

      end

      --end new---------------------

end

  

    

Blender 3D Gamekit Plane Shoot Bullet IOS Android Tutorial

This is a follow up to the plane arcade game tutorial posted before. This time I added plane shooting bullet. For how to run it on real android device such as nexus 7, and ios devices, such as iPad. Please go to my youtube channel: http://www.youtube.com/user/hhhnzw. there are videos showing that.

1. if you continue from last tutorial first thing is to rename the Background image from Plane to background. it is confusing, as the aeroplane is also called plan.

2. Create an empty element. set its parent to plane. and move it to centre of the plane. and move down. so the Z axis' number is -0.1. Rename it as EmptyGunCentre.

3. Create a box, and scale smaller, it will become bullet. So pick a size as you think is proper. Rename it to bullet01.
4. Unwrap & export UV map from the box. and paint it to look like a bullet.
5.load the edited uv map in blender, and apply it to bullet element.
6. Put bullet on to layer 2, HIDDEN layer.
7. Pick the EmptyGunCentre, go to game logic editor to set it up like image below:

8. Turn on the hidden layer and pick the bullet. Then go to physics tab. Change type to dynamic. Change the min max velocity to 3.5. And lock Z axis.

9. Now pack the content in, and save the file. Test it on PC first. Then follow my other videos to run it on Android and IOS devices.

Blender file can be downloaded from link below:

https://docs.google.com/file/d/0B2dWucciRgDPZDNGMlBROW9sekE/edit?usp=sharing