유니티 RectTransform

 

float canvasHei = GetComponentInParent<Canvas>().GetComponent<RectTransform>().rect.height; //현재 캔버스의 높이를 반환
float oneCentimeterPixelCount = (1 / screenHeightCentimeter) * canvasHei //1센치에 대한 캔버스 픽셀사이즈를 반환


//RectTransform계열
float wid = GetComponent<RectTransform>().sizeDelta.x; //rect.width와 동일
float wid = GetComponent<RectTransform>().rect.width; //sizeDelta.x와 동일
textUI.rectTransform.anchoredPosition.x //일반적으로 생각하는 rectTransform의 x좌표
textUI.rectTransform.localPosition.x //Anchors가 미적용된 x좌표, 가급적 사용자제
textUI.rectTransform.rect.x //작동안함, anchoredPosition써라

 

 

사이즈 조정

public GameObject board;
var rectTransform = board.GetComponent<RectTransform>();
var sizeDelta = rectTransform.sizeDelta;
sizeDelta.y = 400;
rectTransform.sizeDelta = sizeDelta;

 

 

 

Rect 사이즈를 표시

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class DrawRectSize : MonoBehaviour
{
    public Color gizmoColor=Color.white;
    void OnDrawGizmos()
    {

        // Draw a semitransparent blue cube at the transforms position
        var rectTransform = GetComponent<RectTransform>();
        if (rectTransform == null)
        {
            return;
        }
        var lossyScale = rectTransform.lossyScale;
        float wid = rectTransform.rect.width;
        float hei = rectTransform.rect.height;
        var pivot = rectTransform.pivot;

        Vector3 downPos = transform.up * lossyScale.y * hei * (pivot.y - 1);
        Vector3 upPos = transform.up * lossyScale.y * hei * pivot.y;
        Vector3 leftPos = transform.right * lossyScale.x * wid * (pivot.x - 1);
        Vector3 rightPos = transform.right * lossyScale.x * wid * pivot.x;

        Gizmos.color = gizmoColor;

        Gizmos.DrawLine(transform.position + downPos + leftPos, transform.position + upPos + leftPos);
        Gizmos.DrawLine(transform.position + downPos + rightPos, transform.position + upPos + rightPos);
        Gizmos.DrawLine(transform.position + downPos + leftPos, transform.position + downPos + rightPos);
        Gizmos.DrawLine(transform.position + upPos + leftPos, transform.position + upPos + rightPos);
    }
}

 

 

 

 

 

특정 시야각만큼 차지하는 RectSize를 가져옴

 (Canvas, Camera) GetCanvasCamera()
{
    var canvas = GetComponentInParent<Canvas>();
    var camera = canvas.worldCamera;
    if (camera == null)
    {
        camera = Camera.main;
    }
    return (canvas,camera);

}
Vector2 GetRectSize(float angle)
{
    (Canvas canvas, Camera camera) = GetCanvasCamera();
    if (camera == null)
    {
        return Vector2.zero;
    }


    var canvasSize = canvas.GetComponent<RectTransform>().rect.size;



    var worldPos = camera.transform.position + camera.transform.rotation * (Quaternion.Euler(angle, 0, 0) * Vector3.forward * 2);
    {
        //debug
        var worldPosb = camera.transform.position + camera.transform.rotation * (Quaternion.Euler(-angle, 0, 0) * Vector3.forward * 2);
        Debug.DrawLine(camera.transform.position, worldPos, Color.yellow);
        Debug.DrawLine(camera.transform.position, worldPosb, Color.yellow);
        Debug.DrawLine(worldPos, worldPosb, Color.yellow);
    }
    var screenPos = camera.WorldToScreenPoint(worldPos);
    var center = camera.ViewportToScreenPoint(Vector2.one * 0.5f);
    var screenSize = camera.ViewportToScreenPoint(Vector2.one);
    var newSize = Vector2.one * Mathf.Abs(center.y - screenPos.y) * 2;

    newSize *= canvasSize.y / screenSize.y;
    return newSize;
}

 

 

 

화면상 RectTransform의 위치

GetComponent<RectTransform>().position //절대적
GetComponent<RectTransform>().localPosition //상대적