APP ColAR Mix 解析 - ARinChina-增强现实中国技术论坛

using System;
using UnityEngine;
public class BGRenderingBehaviour : MonoBehaviour
{
//
// Fields
//
private int mScreenWidth;
private int mScreenHeight;
private bool mFlipHorizontally;
public Camera Camera;
private QCARRenderer.VideoTextureInfo mTextureInfo;
private ScreenOrientation mScreenOrientation;
//
// Methods
//
public void CheckAndSetActive (bool isActive)
{
if (this.Camera.gameObject.active != isActive)
{
this.Camera.gameObject.SetActiveRecursively (isActive);
}
}
private Mesh CreateVideoMesh ()
{
Mesh mesh = new Mesh ();
mesh.vertices = new Vector3[4];
Vector3[] vertices = mesh.vertices;
for (int i = 0; i < 2; i++)
{
for (int j = 0; j < 2; j++)
{
float num = (float)j / 1f - 0.5f;
float num2 = 1f - (float)i / 1f - 0.5f;
vertices [i * 2 + j].x = num * 2f;
vertices [i * 2 + j].y = 0f;
vertices [i * 2 + j].z = num2 * 2f;
}
}
mesh.vertices = vertices;
mesh.triangles = new int[24];
int num3 = 0;
float num4 = (float)this.mTextureInfo.imageSize.x / (float)this.mTextureInfo.textureSize.x;
float num5 = (float)this.mTextureInfo.imageSize.y / (float)this.mTextureInfo.textureSize.y;
mesh.uv = new Vector2[4];
int[] triangles = mesh.triangles;
Vector2[] uv = mesh.uv;
for (int k = 0; k < 1; k++)
{
for (int l = 0; l < 1; l++)
{
int num6 = k * 2 + l;
int num7 = k * 2 + l + 2 + 1;
int num8 = k * 2 + l + 2;
int num9 = k * 2 + l + 1;
triangles [num3++] = num6;
triangles [num3++] = num7;
triangles [num3++] = num8;
triangles [num3++] = num7;
triangles [num3++] = num6;
triangles [num3++] = num9;
uv [num6] = new Vector2 ((float)l / 1f * num4, (float)k / 1f * num5);
uv [num7] = new Vector2 ((float)(l + 1) / 1f * num4, (float)(k + 1) / 1f * num5);
uv [num8] = new Vector2 ((float)l / 1f * num4, (float)(k + 1) / 1f * num5);
uv [num9] = new Vector2 ((float)(l + 1) / 1f * num4, (float)k / 1f * num5);
if (this.mFlipHorizontally)
{
uv [num6].x = 1f - uv [num6].x;
uv [num7].x = 1f - uv [num7].x;
uv [num8].x = 1f - uv [num8].x;
uv [num9].x = 1f - uv [num9].x;
}
}
}
mesh.triangles = triangles;
mesh.uv = uv;
mesh.normals = new Vector3[mesh.vertices.Length];
mesh.RecalculateNormals ();
return mesh;
}
private void PositionVideoMesh ()
{
this.mScreenOrientation = QCARRuntimeUtilities.ScreenOrientation;
this.mScreenWidth = Screen.width;
this.mScreenHeight = Screen.height;
base.gameObject.transform.localRotation = Quaternion.AngleAxis (270f, Vector3.right);
if (this.mScreenOrientation == ScreenOrientation.LandscapeLeft)
{
base.gameObject.transform.localRotation *= Quaternion.identity;
}
else
{
if (this.mScreenOrientation == ScreenOrientation.Portrait)
{
base.gameObject.transform.localRotation *= Quaternion.AngleAxis (90f, Vector3.up);
}
else
{
if (this.mScreenOrientation == ScreenOrientation.LandscapeRight)
{
base.gameObject.transform.localRotation *= Quaternion.AngleAxis (180f, Vector3.up);
}
else
{
if (this.mScreenOrientation == ScreenOrientation.PortraitUpsideDown)
{
base.gameObject.transform.localRotation *= Quaternion.AngleAxis (270f, Vector3.up);
}
}
}
}
base.gameObject.transform.localScale = new Vector3 (1f, 1f, 1f * (float)this.mTextureInfo.imageSize.y / (float)this.mTextureInfo.imageSize.x);
this.Camera.orthographic = true;
float orthographicSize;
if (this.ShouldFitWidth ())
{
if (QCARRuntimeUtilities.IsPortraitOrientation)
{
orthographicSize = (float)this.mTextureInfo.imageSize.y / (float)this.mTextureInfo.imageSize.x * ((float)this.mScreenHeight / (float)this.mScreenWidth);
}
else
{
orthographicSize = (float)this.mScreenHeight / (float)this.mScreenWidth;
}
}
else
{
if (QCARRuntimeUtilities.IsPortraitOrientation)
{
orthographicSize = 1f;
}
else
{
orthographicSize = (float)this.mTextureInfo.imageSize.y / (float)this.mTextureInfo.imageSize.x;
}
}
this.Camera.orthographicSize = orthographicSize;
}
public void SetFlipHorizontally (bool flip)
{
this.mFlipHorizontally = flip;
}
public void SetTexture (Texture texture)
{
base.renderer.material.mainTexture = texture;
}
private bool ShouldFitWidth ()
{
float num = (float)this.mScreenWidth / (float)this.mScreenHeight;
float num2;
if (QCARRuntimeUtilities.IsPortraitOrientation)
{
num2 = (float)this.mTextureInfo.imageSize.y / (float)this.mTextureInfo.imageSize.x;
}
else
{
num2 = (float)this.mTextureInfo.imageSize.x / (float)this.mTextureInfo.imageSize.y;
}
return num >= num2;
}
private void Start ()
{
if (this.Camera == null)
{
this.Camera = Camera.main;
}
}
private void Update ()
{
if (QCARRenderer.Instance.IsVideoBackgroundInfoAvailable ())
{
QCARRenderer.VideoTextureInfo videoTextureInfo = QCARRenderer.Instance.GetVideoTextureInfo ();
if (!this.mTextureInfo.imageSize.Equals (videoTextureInfo.imageSize) || !this.mTextureInfo.textureSize.Equals (videoTextureInfo.textureSize))
{
this.mTextureInfo = videoTextureInfo;
Debug.Log (string.Concat (new object[]
{
"VideoTextureInfo ",
videoTextureInfo.textureSize.x,
" ",
videoTextureInfo.textureSize.y,
" ",
videoTextureInfo.imageSize.x,
" ",
videoTextureInfo.imageSize.y
}));
MeshFilter meshFilter = base.GetComponent<MeshFilter> ();
if (meshFilter == null)
{
meshFilter = base.gameObject.AddComponent<MeshFilter> ();
}
meshFilter.mesh = this.CreateVideoMesh ();
this.PositionVideoMesh ();
}
else
{
if (this.mScreenOrientation != QCARRuntimeUtilities.ScreenOrientation || this.mScreenWidth != Screen.width || this.mScreenHeight != Screen.height)
{
this.PositionVideoMesh ();
}
}
}
}
}

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