This has been bugging me for ages but I finally found a way. Here is my modified drawing line function which works for me. It is based off the one on the wiki and also includes some commands for drawing in 3D space. Enjoy
using System;
using UnityEngine;
public class Drawing
{
public static Texture2D lineTex;
public static void DrawLine(Camera cam, Vector3 pointA, Vector3 pointB) { DrawLine(cam,pointA,pointB, GUI.contentColor, 1.0f); }
public static void DrawLine(Camera cam, Vector3 pointA, Vector3 pointB, Color color) { DrawLine(cam,pointA,pointB, color, 1.0f); }
public static void DrawLine(Camera cam, Vector3 pointA, Vector3 pointB, float width) { DrawLine(cam,pointA,pointB, GUI.contentColor, width); }
public static void DrawLine(Camera cam, Vector3 pointA, Vector3 pointB, Color color, float width){
Vector2 p1 = Vector2.zero;
p1.x = cam.WorldToScreenPoint(pointA).x;
p1.y = cam.WorldToScreenPoint(pointA).y;
Vector2 p2 = Vector2.zero;
p2.x = cam.WorldToScreenPoint(pointB).x;
p2.y = cam.WorldToScreenPoint(pointB).y;
DrawLine(p1,p2,color,width);
}
public static void DrawLine(Rect rect) { DrawLine(rect, GUI.contentColor, 1.0f); }
public static void DrawLine(Rect rect, Color color) { DrawLine(rect, color, 1.0f); }
public static void DrawLine(Rect rect, float width) { DrawLine(rect, GUI.contentColor, width); }
public static void DrawLine(Rect rect, Color color, float width) { DrawLine(new Vector2(rect.x, rect.y), new Vector2(rect.x + rect.width, rect.y + rect.height), color, width); }
public static void DrawLine(Vector2 pointA, Vector2 pointB) { DrawLine(pointA, pointB, GUI.contentColor, 1.0f); }
public static void DrawLine(Vector2 pointA, Vector2 pointB, Color color) { DrawLine(pointA, pointB, color, 1.0f); }
public static void DrawLine(Vector2 pointA, Vector2 pointB, float width) { DrawLine(pointA, pointB, GUI.contentColor, width); }
public static void DrawLine(Vector2 pointA, Vector2 pointB, Color color, float width)
{
pointA.x = (int)pointA.x; pointA.y = (int)pointA.y;
pointB.x = (int)pointB.x; pointB.y = (int)pointB.y;
if (!lineTex) { lineTex = new Texture2D(1, 1); }
Color savedColor = GUI.color;
GUI.color = color;
Matrix4x4 matrixBackup = GUI.matrix;
float angle = Mathf.Atan2(pointB.y-pointA.y, pointB.x-pointA.x)*180f/Mathf.PI;
float length = (pointA-pointB).magnitude;
GUIUtility.RotateAroundPivot(angle, pointA);
GUI.DrawTexture(new Rect(pointA.x, pointA.y, length, width), lineTex);
GUI.matrix = matrixBackup;
GUI.color = savedColor;
}
}
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