mon objectif calculer longeur et point(x,y,z) d'un path pour faire déplacer via un script un objet sur ce path

mesurer longueur path: select votre path puis aller onglet script et dans la console mettre

bpy.context.object.data.splines.active.calc_length(resolution=0)

attention votre path doit pas etre scalé( faire un apply scale)

http://www.f-legrand.fr/scidoc/docmml/graphie/geometrie/bezier/bezier.html

http://www.f-legrand.fr/scidoc/srcdoc/graphie/geometrie/bezier/bezier-pdf.pdf

https://blender.stackexchange.com/questions/47926/get-length-of-bezier-curve-with-python-for-driver

https://blender.stackexchange.com/questions/93434/animation-nodes-setup-not-updating-when-rendering

https://squircleart.github.io/animation-nodes/the-essense-of-animation-nodes-preface.html

 https://docs.blender.org/api/2.70/mathutils.html

https://blenderartists.org/t/how-to-work-out-object-speed-in-game/507123/4

https://sd-5.archive-host.com/membres/up/34b7c9d586a62f04d502ed17cecc18c0aaaa725e/noel/htmlcsscanvas/jncouropenclassroom/javascriptplacementdivetcalculepathetcanvasetetincelle.js

https://blender.stackexchange.com/questions/73630/animate-curves-by-changing-spline-data-using-a-python-script

https://blenderartists.org/t/use-of-foreach-get-and-foreach-set/524646

 https://blender.stackexchange.com/questions/27465/running-a-script-for-each-frame

https://blender.stackexchange.com/questions/66293/how-to-make-python-script-check-some-value-every-frame

https://docs.blender.org/manual/fr/dev/editors/python_console.html

obj.data.splines[...].length

bpy.context.scene.objects.active = bpy.data.objects['Sphere.017']
import bpy
from mathutils import *
from bpy.props import *


#distance between 2 points
def dist(p1, p2):
 return (p2-p1).magnitude


#cuadratic bezier value
def quad(p, t):
 return p[0]*(1.0-t)**2.0 + 2.0*t*p[1]*(1.0-t) + p[2]*t**2.0



#cubic bezier value
def cubic(p, t):
 return p[0]*(1.0-t)**3.0+3.0*p[1]*t*(1.0-t)**2.0+3.0*p[2]*(t**2.0)*(1.0-t)+p[3]*t**3.0




def calct(obj, t):
 mw = obj.matrix_world
 spl = obj.data.splines.active
 points = spl.bezier_points
 nsegs =len(points)-1
 d = 1.0/nsegs
 seg = int(t/d)
 t1 = t/d - int(t/d)
 if t==1:
  seg-=1
  t1 = 1.0
 p = getbezpoints(spl,mw, seg)
 coord = cubic(p, t1)
 print(coord)
 return coord
 

#gets a bezier segment's control points on global coordinates
def getbezpoints(spl, mt, seg=0):
 points = spl.bezier_points
 p0 = mt @ points[seg].co
 p1 = mt @ points[seg].handle_right
 p2 = mt @ points[seg+1].handle_left
 p3 = mt @ points[seg+1].co
 return p0, p1, p2, p3

obj=bpy.data.objects['BezierCircle']

#bpy.context.scene.objects.active = bpy.data.objects['Sphere.017']
#obj1=bpy.data.objects['Cube']

obj.location.x += 1.0

bpy.context.object.location[0] = 0
bpy.context.object.location[1] = 0
bpy.context.object.location[2] = 0
bpy.ops.object.select_all(action='SELECT')


length = 0.0
prec = 1000 #precision
inc = 1/prec #increments
for i in range(0, prec):
 ti = i*inc
 tf = (i+1)*inc
 a = calct(obj, ti)
 print(a)
 b = calct(obj, tf)
 print(b)
 r = (b-a).magnitude
 length+=r

print(length)

https://snakify.org/fr/lessons/two_dimensional_lists_arrays/

Easy and Simple Blender Car Rig Tutorial / suspension rig<>Wheel rigging/Animation Tutorial Blender 2.78 + Dynamic Displacement.<>How to Create Tyre Treads In Blender 2.8<>Blender 2.8 Modeling for 3D Printing : Excavator Bucket<>Blender Car Rig - Feature Demo<>

Animating Curves with the Hook Modifier in Blender

j'en suis la je compte faire un modele low poly et un modele euh moyen poly

I:creer un chemin de déplacement

1/add curve circle edit mode segment subdivide(3)

2/selectionner moitie gauche ( sauf point moitié) deplacer x =-5 idem moitie droite x=+5 ensuite rectifier legerement avec y point controle m-1 et m+1

puis select moitier gauche( sauf point milieu et faire move z +5 puis regler point controle point milieu pour avoir joli courbe

3/une fois courbe fini mesurer sa longeur :

How to measure the curve length without plugins<>animation node

select the curve go to scripting tab  dans la console mettre obj.data.splines.active.calc_length(resolution=0)

II:déplacer un objet le long curve

https://theduckcow.com/dev/blender/

porte du train:

https://blender.stackexchange.com/questions/9355/is-it-possible-to-animate-a-meshs-geometry-without-using-shape-keys

how to rig valve gear in blender

learn blender+ train

Faking Smoke with Particles in Blender Cycles

Creating Roads for the bge - BGE Tutorial

Blender Tutorial Making a Train Follow a Path in the Game Engine Using Steering Actuators <>Modeling a toy train in Blender <>Low Poly Train Track + Particle System Smoke<>Blender Rigging Tutorial Rigging a Train Part 1

How to make Train in Blender<>Making a Railway Track for Train Modelling, Animation and Use in the Game Engine<>How to make a Subway Train Pt 1<>engine animation<>https://www.blendswap.com/blends/view/42846<>Blender Smoke - Moving+Adaptive Domain<>

Low-poly: Campfire

 low poly fire animation | Blender tutorial | quick and easy way | beginner tutorial

 Funky Low Poly Animation (Blender)

Low Poly Island | Beginner | Blender 2.8 Tutorial

Low-poly: Savannah Animal Pack (FREE)<> Low Poly Forest Animals - v1.0<><>

https://blenderartists.org/t/addon-lowpoly-factory-procedural-generator/666094<>https://github.com/luboslenco/add_mesh_LowPolyFactory    <> https://www.lowpolylab.net/

https://luboslenco.com/lowpolyfactory/    https://lowpolyfactory.tumblr.com/    https://blendermarket.com/products/lowpoly-factory

https://www.pinterest.fr/markr_email/low-poly-characters/          https://yandex.kz/collections/card/5a89075e215a8484a68be816/

https://www.google.fr/search?=blender+procedural+content+generator

https://github.com/topics/blender-addon

Poly Art Bears - Unity

Poly Art: Cougar, Panther and Mountain Lion for Unity

Poly Art: Tiger - Unity

Poly Art: Deer

Poly Art: Fox - Unity

Unity 2D Challenge: Community showcase

https://www.behance.net/

https://www.futura-sciences.com/tech/actualites/image-3d-photos-animees-comme-harry-potter-deviennent-realite-74441/

How much does animation cost to make?

Estimate the cost of animation projects for different mediums, styles, quality and duration using our interactive instant animation price calculator. Use this price guide to calculate a ballpark figure for your next animation project.

http://getwrightonit.com/animation-price-guide/

https://www.linkedin.com/pulse/current-reality-augmented-shelly-palmer/

casque-realite-virtuelle-oculus-france