Roaming Ralph (Position Ralph+Collsion)

Scripting Issues
1

i want to understand “Roaming Ralph” from the sample scripts: -> where can i change the hight of the model “Ralph”?
(i changed the model with my own model, but i can see only have of it, rest is below ground: how can i add +5 or something like that to the z-level?) thx

2

Look, I have made an example of ralph in a simple way which it is also able to jump (without using gravity physics)
by pressing “A” button and there you will be able to change the Z value of it too

I removed the unimportant codes, and also I removed the codes of collision with trees and rocks (that will make ralph go over the tree) but you can take it from the original code
http://www.mediafire.com/file/dl7d0377lb9x494/ralph-jump.zip

3

Ralph’s origin is at his feet, so if you don’t want to change it by code, shift your model’s origin to its feet (in the modeler).

4

thx, model is now in the right position. :slight_smile:

+new question in my learning progress:
how can i change the model “world” /how do i have to export it in blender/chicken export, so that it work with collision dedection correctly?
-> it’s not working/i get the following error-message:

5

start_point is an empty node, serves as Ralph spawn position.

6

and if you want to replace the terrain, you either have to create an empty node called “start_point” in your modeleditor. or you change the line of code which puts ralph there and hard-code it to some value.

you may also need to change the collision flag in your resulting egg file. [Ralph not Moving)

7

thx! now it seems to work: can see ralph+terrain+ralph is walking, yatta!:slight_smile:

found the solution in:
bcchang.com/immersive_blog/?p=561

→ you have to add:

  • AND change the name to “terrain” in your .egg file:

→ how can i now add objects, where ralph can’t walk through (like the trees in the original sample)/collision detection? thx

8

the download link is dead, could u post a new one plz? thx

9

[code]
Hi!

I am struggling with this problem from 2 days. please help :slight_smile:

I am changing the Roaming Ralph code by adding my own model which is an Astronaut (named ‘astro’).
I now need to test it for collision with other objects which I have introduced in the world.(say a ‘rover’)
So basically i am checking (astro-into-rover)

I added a collision sphere on asto and on the rover. but still I am not able to detect collisions.
I have pasted the imp parts of code for reference:


        self.rover = loader.loadModel("models/more/rover/rover")      
        self.rover.reparentTo(render)
        self.rover.setPos(-114,8,0.5)
        self.rover.setHpr(219.29,354.810,351.87)
        self.rover.setScale(.04)
		
        self.cNode = CollisionNode('rover')
        self.cNode.addSolid(CollisionSphere(0,0,0,80))
        self.roverC =          self.rover.attachNewNode(self.cNode)


self.astroGroundRay = CollisionRay()
        self.astroGroundRay.setOrigin(0,0,1000)
        self.astroGroundRay.setDirection(0,0,-1)
		
        self.astroGroundCol = CollisionNode('astroRay')
        self.astroGroundCol.addSolid(self.astroGroundRay)
        self.astroGroundCol.addSolid(CollisionSphere(0,0,100,50)) 
        self.astroGroundCol.setFromCollideMask(BitMask32.bit(1))
        self.astroGroundCol.setIntoCollideMask(BitMask32.allOff())
        self.astroGroundColNp = self.astro.attachNewNode(self.astroGroundCol)
        
        self.astroGroundHandler = CollisionHandlerQueue()
        self.cTrav.addCollider(self.astroGroundColNp, self.astroGroundHandler)
        self.astroGroundColNp.show()


self.accept( 'into-self.rover' ,self.collide1)

def collide1 (self,collEntry):
		print ("collision!")
10

collision detection setup always makes me have to think hard so this is only a half-baked suggestion …

  • what about the into mask on rover?
  • did you make a CollisionHandlerEvent() ?