Zombie just rolling around

Scripting Issues
1 
from direct.showbase.ShowBase import ShowBase
from direct.showbase.InputStateGlobal import *
from direct.gui.DirectLabel import DirectLabel
from direct.gui.DirectButton import DirectButton
from panda3d.core import *
from panda3d.bullet import *
import sys

loadPrcFile('config/Config.prc')

class Game(ShowBase):
    def __init__(self):
        ShowBase.__init__(self)
        self.menu()

    def menu(self):
        self.label = DirectLabel(text='Fight 4 Life', pos=(400, 0, -250), scale=50,  parent=self.pixel2d)
        self.singleplayer = DirectButton(text='Singleplayer', pos=(400, 0, -350), scale=50, parent=self.pixel2d, command=self.game)
        self.multiplayer = DirectButton(text='Multiplayer', pos=(400, 0, -450), scale=50, parent=self.pixel2d)
        self.multiplayer['state'] = 0

    def game(self):
        self.label.hide()
        self.singleplayer.hide()
        self.multiplayer.hide()

        self.props = WindowProperties()
        self.props.cursor_hidden = True
        self.win.requestProperties(self.props)
        self.win.setClearColor((0, 1, 1, 1))
        
        self.disableMouse()

        self.mouse_sens = 0.05
        
        inputState.watchWithModifiers('forward', 'w')
        inputState.watchWithModifiers('reverse', 's')
        inputState.watchWithModifiers('left', 'a')
        inputState.watchWithModifiers('right', 'd')

        self.accept('escape', self.exit)

        self.world = BulletWorld()
        self.world.setGravity(0, 0, -9.81)

        self.groundNode = BulletRigidBodyNode('Ground')
        self.groundShape = BulletPlaneShape(Vec3(0, 0, 1), 1)
        self.groundNode.addShape(self.groundShape)
        self.world.attachRigidBody(self.groundNode)
        self.groundNP = self.render.attachNewNode(self.groundNode)
        self.groundNP.setPos(0, 0, -2)
        self.groundModel = self.loader.loadModel('models/ground.bam')
        self.groundModel.setScale(100, 100, 100)
        self.groundModel.reparentTo(self.groundNP)

        
        self.capsuleShape = BulletBoxShape(Vec3(5, 5, 5))
        self.characterNode = BulletCharacterControllerNode(self.capsuleShape, 1.0, 'Character')
        self.world.attachCharacter(self.characterNode)
        self.characterNP = self.render.attachNewNode(self.characterNode)
        self.camera.reparentTo(self.characterNP)
        self.characterNP.setZ(100)

        self.zombieNode = BulletRigidBodyNode('Zombie')
        self.zombieShape = BulletBoxShape(Vec3(25, 25, 25))
        self.zombieNode.setMass(1.0)
        self.zombieNode.addShape(self.zombieShape)
        self.world.attachRigidBody(self.zombieNode)
        self.zombieNP = self.render.attachNewNode(self.zombieNode)
        self.zombieModel = self.loader.loadModel("models/zombie.bam")
        self.zombieModel.setScale(25, 25, 25)
        self.zombieModel.setColor(0, 0, 255)
        self.zombieModel.reparentTo(self.zombieNP)

        self.taskMgr.add(self.update, "Updates the scene")
        
    def setKey(self, key, value):
        self.keyMap[key] = value
    
    def update(self, task):
        dt = globalClock.getDt()

        speed = Vec3(0, 0, 0)

        if inputState.isSet('forward'): speed.setY( 500.0)
        if inputState.isSet('reverse'): speed.setY(-500.0)
        if inputState.isSet('left'):    speed.setX(-500.0)
        if inputState.isSet('right'):   speed.setX( 500.0)
        self.characterNode.setLinearMovement(speed, True)

        self.world.doPhysics(dt)

        md = self.win.getPointer(0)
        x = md.getX()
        y = md.getY()
        if self.win.movePointer(0, self.win.getXSize() // 2, self.win.getYSize() // 2):
            self.characterNP.setH(self.characterNP.getH() - (x - self.win.getXSize()/2)*self.mouse_sens) 
            self.characterNP.setP(self.characterNP.getP() - (y - self.win.getYSize()/2)*self.mouse_sens)
        
        return task.cont

    def exit(self):
        self.props.cursor_hidden = False
        self.win.requestProperties(self.props)
        sys.exit()
        
game = Game()
game.run()

This is my code. Whatever I do, the zombie keeps on spinning.ground.bam (2.2 KB)
model.bam (3.0 KB)
zombie.bam (23.2 KB)
ground

2

Considering the shape and size of your zombie’s collision-object, and the position of the ground, perhaps the zombie is stuck in the ground, and the physics system is struggling to resolve this situation.

What happens if you move your zombie’s starting z-coordinate to, say, 50?

3

No, it is still spinning

4

Hmm… I don’t suppose that you could post a video of the behaviour, could you? Seeing it might prompt further thoughts as to its source.

5

I think the issue is something to do with how the player model is not connected to the self.characterNP node point. But I have no idea how to do that.

I provided a video demo with my own models below.

Video link of demo: Link Broken

6

If the zombie-model is supposed to be attached to “self.characterNP”, then it should be possible to do that simply by calling “self.zombieModel.reparentTo(self.characterNP)”. (Presumably instead of reparenting it to “self.zombieNP”.)

Unless you have in mind a more complex relationship between the two nodes…? If so, could you elaborate, please?

7

That fixed the issue! Thanks @Thaumaturge! :+1:

1 Like