Difference between revisions of "IC Python API:Basic Animation"

Revision as of 18:44, 12 May 2019

Main article: RL Python Samples.

This article will focus on basic animation with the standard interface of setting the data bloc for the transform controller. However, we will attempt to spice it up with an algorithm for parametric animation.

Preparing the Scene

Prepare an iClone scene for this lesson with the following steps:

1. Create a new iClone scene
2. Create a ball: Create > Primitive Shape > Sphere.
3. Create a cylinder: Create > Primitive Shape > Cylinder.

Required Modules

Only the standard RLPY module is required for this lesson.

import RLPy

Parametric Algorithm

Parametric equations are commonly used to express the coordinates of the points that make up a geometric object such as a curve or surface. In this example, we'll use the following formula to travel along the parameter of a circle:

point.x = origin.x + radius * Cosine( angle )
point.y = origin.y + radius * Sine( angle )

⚠ Angle is in radians.

The Code

def parametric_point(center_point, radius, angle):
    # Convert angle to radians
    a = RLPy.RMath.CONST_DEG_TO_RAD * angle
    # Calculate the point on the circumference of a circle
    x = center_point.x + radius * RLPy.RMath.Cos(a)
    y = center_point.y + radius * RLPy.RMath.Sin(a)

    return RLPy.RVector2(x, y)