Created
July 14, 2018 06:38
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Draw Bezier curve between two transforms/objects in Unity3D
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using System.Collections; | |
using System.Collections.Generic; | |
using UnityEngine; | |
public class Bezier : MonoBehaviour { | |
public Transform firstObject; | |
public Transform secondObject; | |
Vector2 P0; | |
public Vector2 P1; | |
public Vector2 P2; | |
Vector2 P3; | |
public LineRenderer drawer; | |
public Vector2 Evaluate(float t) | |
{ | |
float t1 = 1 - t; | |
return t1 * t1 * t1 * P0 + 3 * t * t1 * t1 * P1 + | |
3 * t * t * t1 * P2 + t * t * t * P3; | |
} | |
public void Render() | |
{ | |
P0 = new Vector2(firstObject.position.x, firstObject.position.y); | |
P3 = new Vector2(secondObject.position.x, secondObject.position.y); | |
drawer = gameObject.GetComponent<LineRenderer>(); | |
if (!drawer) { | |
gameObject.AddComponent<LineRenderer>(); | |
drawer = gameObject.GetComponent<LineRenderer>(); | |
} | |
drawer.positionCount = 0; | |
for (int i = 1; i < 50; i++) | |
{ | |
float t = (i - 1f) / 49f; | |
float t1 = i / 49f; | |
var v = Evaluate(t); | |
var v1 = Evaluate(t1); | |
drawer.SetPosition(drawer.positionCount++, v); | |
drawer.SetPosition(drawer.positionCount++, v1); | |
} | |
} | |
} |
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