Databases
StackOverflow2013
Postsdbo
PORotation an object around his center using vpython
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PORotation an object around his center using vpython
    primarykey
    data
    text
    <p>I'm making a moonlander game using VPython. The moonlander itself must be able to rotate around his own center, but he rotates around the wrong axis and/or around his original position instead. The axis and position where it has to rotate around don't change when the position of the moonlander changes. I don't know how to do this.</p> <p>The moonlander is made of curves, but I have a frame that contains the moonlander. Here is the code (sorry about the code being in dutch, I hope you understand enough):</p> <pre><code>from visual import * from math import * from random import randint maanoppervlak = curve(pos=[(-20,-2),(-18,-5)],color=color.red) maanoppervlak.append(pos=(-18,-5)) maanoppervlak.append(pos=(-15,-4),color=color.red) maanoppervlak.append(pos=(-15,-4)) maanoppervlak.append(pos=(-14,-4),color=color.red) maanoppervlak.append(pos=(-14,-4)) maanoppervlak.append(pos=(-13,-15),color=color.red) maanoppervlak.append(pos=(-13,-15), color=color.green) maanoppervlak.append(pos=(-7,-15),color=color.green) maanoppervlak.append(pos=(-7,-15),color=color.red) maanoppervlak.append(pos=(-3,4),color=color.red) maanoppervlak.append(pos=(-3,4)) maanoppervlak.append(pos=(-1,0),color=color.red) maanoppervlak.append(pos=(-1,0)) maanoppervlak.append(pos=(3,-2),color=color.red) maanoppervlak.append(pos=(3,-2),color=color.green) maanoppervlak.append(pos=(8,-2),color=color.green) maanoppervlak.append(pos=(8,-2),color=color.red) maanoppervlak.append(pos=(13,-8),color=color.red) maanoppervlak.append(pos=(13,-8)) maanoppervlak.append(pos=(16,-5),color=color.red) maanoppervlak.append(pos=(16,-5)) maanoppervlak.append(pos=(19,-12),color=color.red) maanoppervlak.append(pos=(19,-12)) maanoppervlak.append(pos=(20,-7), color=color.red) print scene.width f = frame() #maken van een frame waar de maanlander in zit f.axis = (1,0,0) f.pos = vector(-4,-10,0) maanlander = curve(frame=f, pos=[(1,1),(2,1),(1.5,1),(1.5,2),(2,2.5),(2,3.5),(2.75,3.5), (2.25,4),(2.25,4.5),(2.75,5),(3.75,5),(4.25,4.5), (4.25,4),(3.75,3.5),(4.5,3.5),(4.5,2.5),(3.5,2.5),(3.75,2), (2.75,2),(3,2.5),(2,2.5),(4.5,2.5),(5,2),(5,1),(4.5,1), (5.5,1)],color=color.blue) maanlander.accel = vector(0,0) #acceleratie van de maanlander f.accel = vector(0,0) #acceleratie van de frame (deze of die hierboven is waarschijnlijk overbodig) f.velocity = vector(0,0) #snelheid van de frame deltat = 0.005 state = true while state == true: #start van de loop rate(100) f.velocity = f.velocity + maanlander.accel*deltat #bepaalt de snelheid adhv de accel. maanlander.pos = maanlander.pos + f.velocity*deltat #bepaalt de positie adhv de snelheid if scene.kb.keys: # is there an event waiting to be processed? s = scene.kb.getkey() # obtain keyboard information if s == 'left': #er wordt op linkertoets gedrukt f.rotate(angle=pi/15., axis=(0,0,1), origin=(f.pos + vector(2.75,2.5,0))) #object moet rond zijn middden draaien (werkt nog niet) elif s == 'right': f.rotate(angle=-pi/15., axis=(0,0,1), origin=vector(2.75,2.5,0)) #zelfde als bij left, maar in omgekeerde richting elif s == 'up': #'boost' maanlander.accel = maanlander.accel + vector(0,10) </code></pre> <p>So, how can you rotate the moonlander, and also when it has a different position than its original one?</p> <p>Thanks in advance</p>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USArno Moonens
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. PORotation an object around his center using vpython
      1. USArno Moonens
      1. VTFavorite
    1. COSame as always. Translate to the origin, rotate, translate back.
      singulars
      1. PORotation an object around his center using vpython
      1. USIgnacio Vazquez-Abrams
    2. COI tried what you said, but it doesn't work. This is the code for when you push the 'left' button: if s == 'left': #left button is pushed keep = f.pos f.pos = f.pos - keep f.rotate(angle=pi/15., axis=(0,0,1), origin=(0,0,0)) f.pos = f.pos + keep
      singulars
      1. PORotation an object around his center using vpython
      1. USArno Moonens
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload