Planetary-Collision-VR

Immersive 3D visualizations of planetary collisions using smoothed particle hydrodynamics and virtual reality.

This project is supported by the University of Arizona/GPSC research grant, “Virtual Reality Gives New Insights Into How Planets Form”

Getting started with Unity

1. Import our Unity Package
2. Import SteamVR plugin from Asset Store
3. Make sure HTC Vive is plugged in and SteamVR is on stand by
4. Open “DemoScene” and hit Play

All code was tested with Unity v2018.3.10

Converting Paraview Models with Blender (.x3d -> .obj)

1. Open Blender (v2.79)
2. Navigate to script editor (crtl+right arrow)x3
3. Open new script. Press button “+ New”
4. Delete the square model, if present
5. Paste code below

import bpy
import glob 
file_loc = "C:\\Users\\Kyle\\Documents\\SPH_objects\\"
files = glob.glob(file_loc+"*.x3d")
for i in range(len(files)):
    imported_object = bpy.ops.import_scene.x3d(filepath=files[i])
    obj = bpy.context.selected_objects[0]
    exported_object = bpy.ops.export_scene.obj(filepath=files[i].split('.x3d')[0]+'.obj')
    print('Imported name: ', obj.name)
    bpy.data.objects[obj.name].select = True   
    bpy.ops.object.delete()

Make sure to change the file location

Creating an animation from multiple obj files in Blender

# https://docs.blender.org/api/2.79b/info_quickstart.html
import bpy
import glob 
file_loc = "C:\\Users\\Kyle\\Documents\\Unity Projects\\SPH_Visualization\\Assets\\models\\"
files = glob.glob(file_loc+"*.x3d")
scene = bpy.context.scene
scene.objects.keys()
bpy.context.scene.render.fps = 5
bpy.context.scene.frame_start = 0
bpy.context.scene.frame_end = len(files)
objs = [] 
for i in range(len(files)):
    imported_object = bpy.ops.import_scene.x3d(filepath=files[i])
    obj = bpy.context.selected_objects[0]
    obj.hide = True
    modifier=obj.modifiers.new('Decimate 0.5','DECIMATE')
    modifier.ratio=0.5
    modifier.use_collapse_triangulate=True
    objs.append( obj)
def hide_true(objs,idx):
    for i in range(len(objs)):
        if i == idx:
            objs[i].hide = False
            objs[i].keyframe_insert(data_path="hide")
        else:
            objs[i].hide = True
            objs[i].keyframe_insert(data_path="hide")
for i in range(len(files)):
    scene.frame_set(i)    
    hide_true(objs,i)
for k in range(len(bpy.data.objects)-1,0,-1):
    if 'Face' not in bpy.data.objects[k].name:
        bpy.data.objects[k].select = True
    else: 
        bpy.data.objects[k].select = False 
bpy.ops.object.delete()