Jim Cheng chengkehan

chengkehan / gist:9325affe6c2a80c3c5ad3324e303c428

Created December 10, 2022 05:06

Convert ugui anchored position to world position without RectTransform

	private Vector3 AnchoredPositionToWorldPosition(Vector2 anchoredPosition)
	{
	Vector2 canvasSize = canvasRectTransform.sizeDelta;

	Vector2 viewportPosition = new Vector2(
	(anchoredPosition.x + (canvasSize.x * 0.5f)) / canvasSize.x,
	(anchoredPosition.y + (canvasSize.y * 0.5f)) / canvasSize.y
	);
	Vector3 worldPosition = CameraManager.GetInstance().GetUICamera().ViewportToWorldPoint(viewportPosition);
	worldPosition.z = canvasRectTransform.position.z;

chengkehan / gist:e6000f98396c31d8ee82da45f47d661c

Created December 2, 2020 07:30

Check whether is in view frustum

	Vector3 pos = targetTransform.position;
	Matrix4x4 vp = mainCamera.projectionMatrix * mainCamera.worldToCameraMatrix;
	Vector4 porjPos = vp * new Vector4(pos.x, pos.y, pos.z, 1);
	// projPos.xyz / projPos.w [-1, 1] in view frustum

chengkehan / gist:edc0140c938ed2c8e1b5b36f78d37f89

Created August 12, 2020 12:42

	// rotation and transform a 2d array
	// aniticlockwise 90 degree
	Vector2[] tUV2 = new Vector2[tUV.Length];
	System.Array.Copy(tUV, 0, tUV2, 0, tUV.Length);
	for (int pi = 0; pi < h; ++pi)
	{
	for (int pj = 0; pj < w; ++pj)
	{
	Vector2 pc = tUV2[pi * w + pj];
	tUV[(w - pj - 1) * w + pi] = pc;

chengkehan / gist:4eef0cd0108996ccafc1f3f0f869ae65

Created August 12, 2020 03:21

	// Convert tiling from UnityTerrain to CustomTerrain
	material.SetTextureScale("_Splat0", new Vector2(1.0f / terrainLayer.tileSize.x * terrainData.size.x, 1.0f / terrainLayer.tileSize.y * terrainData.size.z))