Row Your Boat Part 1

Row Your Boat (Part 1)

This series is about making animations in Grasshopper. In this video we build a component that makes creating animations very easy—a component that produces a list of counters. These counters can be connected to any inputs on your canvas to create motion and/or simulate the passage of time for presentations or to generate geometry.

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Row Part 1.gh

Code

Below is the C# script we used to make the Row Your Boat component. This is all of the code from our scripting component.

    
// Grasshopper Script Instance
#region Usings
using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
using System.Drawing;

using Rhino;
using Rhino.Geometry;

using Grasshopper;
using Grasshopper.Kernel;
using Grasshopper.Kernel.Data;
using Grasshopper.Kernel.Types;
#endregion

public class Script_Instance : GH_ScriptInstance
{

    private void RunScript(
	bool reset,
	int counters,
	double speed,
	double waitFor,
	ref object a,
	ref object b)
    {
        if (reset){
            counterList.Clear();
            file_number = 0;
            justReset = true;
        }
        else{
            file_number++;

            if (counterList.Count < counters){
                // Initializing all counters to 0
                while (counterList.Count < counters){
                    counterList.Add(0.0);
                }
            }
            if (justReset){
                justReset = false;
            }
            else{
                for (int i = 0; i < counterList.Count; i++){
                    if (i==0 || counterList[i-1] >= waitFor){
                        if (counterList[i] < 1){
                            counterList[i] += speed;
                            if (counterList[i] > 1){
                                counterList[i] = 1;
                            }
                        }
                    }
                }
            }

        }

        a = counterList;
        b = file_number;
    }

    private List<double> counterList = new List<double>();
    private int file_number = 0;
    private bool justReset = false; // Flag that indicates if the script was just reset
}