private static bool CaptureViews(
Transform root,
BillboardImposter imposter,
Snapshots[] snapshots,
Transform lightingRoot,
Shader albedoBake,
Shader normalBake,
ComputeShader processCompute)
{
Vector3 originalScale = root.localScale;
root.localScale = Vector3.one;
var prevRt = RenderTexture.active;
var baseAtlas = RenderTexture.GetTemporary(_atlasResolution, _atlasResolution, 0, RenderTextureFormat.ARGB32, RenderTextureReadWrite.Linear);
baseAtlas.enableRandomWrite = true;
baseAtlas.Create();
var packAtlas = RenderTexture.GetTemporary(_atlasResolution, _atlasResolution, 0, RenderTextureFormat.ARGB32, RenderTextureReadWrite.Linear);
packAtlas.enableRandomWrite = true;
packAtlas.Create();
var tempAtlas = RenderTexture.GetTemporary(baseAtlas.descriptor);
tempAtlas.Create();
var frameReso = _atlasResolution / imposter.Frames;
var frame = RenderTexture.GetTemporary(frameReso, frameReso, 32, RenderTextureFormat.ARGB32, RenderTextureReadWrite.Linear);
frame.enableRandomWrite = true;
frame.Create();
var packFrame = RenderTexture.GetTemporary(frameReso, frameReso, 32, RenderTextureFormat.ARGB32, RenderTextureReadWrite.Linear);
packFrame.Create();
var tempFrame = RenderTexture.GetTemporary(frame.descriptor);
tempFrame.Create();
var frameResUpscale = frameReso * 4;
var superSizedFrame = RenderTexture.GetTemporary(frameResUpscale, frameResUpscale, 32, RenderTextureFormat.ARGB32, RenderTextureReadWrite.Linear);
superSizedFrame.enableRandomWrite = true;
superSizedFrame.Create();
var superSizedFrameTemp = RenderTexture.GetTemporary(superSizedFrame.descriptor);
var superSizedAlphaMask = RenderTexture.GetTemporary(superSizedFrame.descriptor);
superSizedAlphaMask.Create();
imposter.BaseTexture = new Texture2D(baseAtlas.width, baseAtlas.height, TextureFormat.ARGB32, true, true);
imposter.PackTexture = new Texture2D(baseAtlas.width, baseAtlas.height, TextureFormat.ARGB32, true, true);
ComputeBuffer minDistancesBuffer = new ComputeBuffer(frame.width * frame.height, sizeof(float));
ComputeBuffer maxDistanceBuffer = new ComputeBuffer(1, sizeof(float));
const int layer = 30;
var clearColor = Color.clear;
var camera = new GameObject().AddComponent <Camera>();
camera.gameObject.hideFlags = HideFlags.DontSave;
camera.cullingMask = 1 << layer;
camera.clearFlags = CameraClearFlags.SolidColor;
camera.backgroundColor = clearColor;
camera.orthographic = true;
camera.nearClipPlane = 0f;
camera.farClipPlane = imposter.Radius * 2f;
camera.orthographicSize = imposter.Radius;
camera.allowMSAA = false;
camera.enabled = false;
var frameCount = imposter.Frames * imposter.Frames;
var originalLayers = new Dictionary <GameObject, int>();
StoreLayers(root, layer, ref originalLayers);
var originalLights = new Dictionary <Light, bool>();
var customLit = lightingRoot != null;
if (customLit)
{
var lights = FindObjectsOfType <Light>();
for (var i = 0; i < lights.Length; i++)
{
if (!lights[i].transform.IsChildOf(lightingRoot))
{
if (originalLights.ContainsKey(lights[i]))
{
continue;
}
originalLights.Add(lights[i], lights[i].enabled);
lights[i].enabled = false;
}
else
{
lights[i].enabled = true;
if (!originalLights.ContainsKey(lights[i]))
{
originalLights.Add(lights[i], false);
}
}
}
}
var tempMinMaxRT = RenderTexture.GetTemporary(frame.width, frame.height, 0, RenderTextureFormat.ARGB32);
tempMinMaxRT.Create();
Graphics.SetRenderTarget(tempMinMaxRT);
GL.Clear(true, true, Color.clear);
camera.clearFlags = CameraClearFlags.Nothing;
camera.backgroundColor = clearColor;
camera.targetTexture = tempMinMaxRT;
var min = Vector2.one * frame.width;
var max = Vector2.zero;
for (var i = 0; i < frameCount; i++)
{
if (i > snapshots.Length - 1)
{
Debug.LogError("[Imposter] snapshot data length less than frame count! this shouldn't happen!");
continue;
}
//position camera with the current snapshot info
var snap = snapshots[i];
camera.transform.position = snap.Position;
camera.transform.rotation = Quaternion.LookRotation(snap.Ray, Vector3.up);
//render alpha only
Shader.SetGlobalFloat("_ImposterRenderAlpha", 1f);
camera.RenderWithShader(albedoBake, "");
camera.ResetReplacementShader();
//render without clearing (accumulating filled pixels)
camera.Render();
//supply the root position taken into camera space
//this is for the min max, in the case root is further from opaque pixels
var viewPos = camera.WorldToViewportPoint(root.position);
var texPos = new Vector2(viewPos.x, viewPos.y) * frame.width;
texPos.x = Mathf.Clamp(texPos.x, 0f, frame.width);
texPos.y = Mathf.Clamp(texPos.y, 0f, frame.width);
min.x = Mathf.Min(min.x, texPos.x);
min.y = Mathf.Min(min.y, texPos.y);
max.x = Mathf.Max(max.x, texPos.x);
max.y = Mathf.Max(max.y, texPos.y);
}
camera.clearFlags = CameraClearFlags.SolidColor;
camera.backgroundColor = clearColor;
camera.targetTexture = null;
//now read render texture
var tempMinMaxTex = new Texture2D(tempMinMaxRT.width, tempMinMaxRT.height, TextureFormat.ARGB32, false);
RenderTexture.active = tempMinMaxRT;
tempMinMaxTex.ReadPixels(new Rect(0f, 0f, tempMinMaxRT.width, tempMinMaxRT.height), 0, 0);
tempMinMaxTex.Apply();
var tempTexC = tempMinMaxTex.GetPixels32();
//loop pixels get min max
for (var c = 0; c < tempTexC.Length; c++)
{
if (tempTexC[c].r != 0x00)
{
var texPos = Get2DIndex(c, tempMinMaxRT.width);
min.x = Mathf.Min(min.x, texPos.x);
min.y = Mathf.Min(min.y, texPos.y);
max.x = Mathf.Max(max.x, texPos.x);
max.y = Mathf.Max(max.y, texPos.y);
}
}
DestroyImmediate(tempMinMaxTex, true);
RenderTexture.ReleaseTemporary(tempMinMaxRT);
//rescale radius
var len = new Vector2(max.x - min.x, max.y - min.y);
var maxR = Mathf.Max(len.x, len.y);
var ratio = maxR / frame.width;
imposter.Radius = imposter.Radius * ratio;
camera.farClipPlane = imposter.Radius * 2f;
camera.orthographicSize = imposter.Radius;
Vector3 scaleFactor = new Vector3(root.localScale.x / originalScale.x, root.localScale.y / originalScale.y, root.localScale.z / originalScale.z);
imposter.Offset = Vector3.Scale(imposter.Offset, scaleFactor);
snapshots = UpdateSnapshots(imposter.Frames, imposter.Radius, root.position + imposter.Offset, imposter.IsHalf);
for (var frameIndex = 0; frameIndex < frameCount; frameIndex++)
{
if (frameIndex > snapshots.Length - 1)
{
Debug.LogError("[Imposter] snapshot data length less than frame count! this shouldn't happen!");
continue;
}
var snap = snapshots[frameIndex];
camera.transform.position = snap.Position;
camera.transform.rotation = Quaternion.LookRotation(snap.Ray, Vector3.up);
clearColor = Color.clear;
//target and clear base frame
Graphics.SetRenderTarget(superSizedFrame);
GL.Clear(true, true, clearColor);
Graphics.SetRenderTarget(superSizedFrameTemp);
GL.Clear(true, true, clearColor);
camera.targetTexture = superSizedFrameTemp;
camera.backgroundColor = clearColor;
if (!customLit)
{
Shader.SetGlobalFloat("_ImposterRenderAlpha", 0f);
camera.RenderWithShader(albedoBake, "");
camera.ResetReplacementShader();
}
else
{
camera.Render();
}
camera.targetTexture = superSizedAlphaMask;
camera.backgroundColor = clearColor;
camera.Render();
Graphics.Blit(superSizedAlphaMask, superSizedFrame, _processingMat, 3);
Graphics.Blit(superSizedFrame, superSizedAlphaMask);
_processingMat.SetTexture("_MainTex", superSizedFrameTemp);
_processingMat.SetTexture("_MainTex2", superSizedAlphaMask);
_processingMat.SetFloat("_Step", 1f);
Graphics.Blit(superSizedFrameTemp, superSizedFrame, _processingMat, 1);
Graphics.SetRenderTarget(frame);
GL.Clear(true, true, clearColor);
Graphics.Blit(superSizedFrame, frame);
Graphics.SetRenderTarget(superSizedFrameTemp);
GL.Clear(true, true, clearColor);
Graphics.SetRenderTarget(superSizedFrame);
GL.Clear(true, true, clearColor);
clearColor = new Color(0.0f, 0.0f, 0.0f, 0.5f);
camera.targetTexture = superSizedFrame;
camera.backgroundColor = clearColor;
camera.RenderWithShader(normalBake, "");
camera.ResetReplacementShader();
Graphics.SetRenderTarget(packFrame);
GL.Clear(true, true, clearColor);
Graphics.Blit(superSizedFrame, packFrame);
Graphics.SetRenderTarget(tempFrame);
GL.Clear(true, true, Color.clear);
int threadsX, threadsY, threadsZ;
CalcWorkSize(packFrame.width * packFrame.height, out threadsX, out threadsY, out threadsZ);
processCompute.SetTexture(0, "Source", packFrame);
processCompute.SetTexture(0, "SourceMask", frame);
processCompute.SetTexture(0, "Result", tempFrame);
processCompute.SetBool("AllChannels", true);
processCompute.SetBool("NormalsDepth", true);
processCompute.Dispatch(0, threadsX, threadsY, threadsZ);
Graphics.Blit(tempFrame, packFrame);
Graphics.SetRenderTarget(tempFrame);
GL.Clear(true, true, Color.clear);
CalcWorkSize(frame.width * frame.height, out threadsX, out threadsY, out threadsZ);
processCompute.SetTexture(0, "Source", frame);
processCompute.SetTexture(0, "SourceMask", frame);
processCompute.SetTexture(0, "Result", tempFrame);
processCompute.SetBool("AllChannels", false);
processCompute.SetBool("NormalsDepth", false);
processCompute.Dispatch(0, threadsX, threadsY, threadsZ);
Graphics.Blit(tempFrame, frame);
Graphics.SetRenderTarget(tempFrame);
GL.Clear(true, true, Color.clear);
CalcWorkSize(frame.width * frame.height, out threadsX, out threadsY, out threadsZ);
processCompute.SetTexture(1, "Source", frame);
processCompute.SetTexture(1, "SourceMask", frame);
processCompute.SetBuffer(1, "MinDistances", minDistancesBuffer);
processCompute.Dispatch(1, threadsX, threadsY, threadsZ);
processCompute.SetInt("MinDistancesLength", minDistancesBuffer.count);
processCompute.SetBuffer(2, "MaxOfMinDistances", maxDistanceBuffer);
processCompute.SetBuffer(2, "MinDistances", minDistancesBuffer);
processCompute.Dispatch(2, 1, 1, 1);
CalcWorkSize(frame.width * frame.height, out threadsX, out threadsY, out threadsZ);
processCompute.SetTexture(3, "Source", frame);
processCompute.SetTexture(3, "SourceMask", frame);
processCompute.SetTexture(3, "Result", tempFrame);
processCompute.SetBuffer(3, "MinDistances", minDistancesBuffer);
processCompute.SetBuffer(3, "MaxOfMinDistances", maxDistanceBuffer);
processCompute.Dispatch(3, threadsX, threadsY, threadsZ);
Graphics.Blit(tempFrame, frame);
int x;
int y;
XYFromIndex(frameIndex, imposter.Frames, out x, out y);
x *= frame.width;
y *= frame.height;
Graphics.CopyTexture(frame, 0, 0, 0, 0, frame.width, frame.height, baseAtlas, 0, 0, x, y);
Graphics.CopyTexture(packFrame, 0, 0, 0, 0, packFrame.width, packFrame.height, packAtlas, 0, 0, x, y);
}
Graphics.SetRenderTarget(packAtlas);
imposter.PackTexture.ReadPixels(new Rect(0f, 0f, packAtlas.width, packAtlas.height), 0, 0);
Graphics.SetRenderTarget(baseAtlas);
imposter.BaseTexture.ReadPixels(new Rect(0f, 0f, baseAtlas.width, baseAtlas.height), 0, 0);
RenderTexture.active = prevRt;
baseAtlas.Release();
frame.Release();
packAtlas.Release();
packFrame.Release();
RenderTexture.ReleaseTemporary(baseAtlas);
RenderTexture.ReleaseTemporary(packAtlas);
RenderTexture.ReleaseTemporary(tempAtlas);
RenderTexture.ReleaseTemporary(frame);
RenderTexture.ReleaseTemporary(packFrame);
RenderTexture.ReleaseTemporary(tempFrame);
RenderTexture.ReleaseTemporary(superSizedFrame);
RenderTexture.ReleaseTemporary(superSizedAlphaMask);
RenderTexture.ReleaseTemporary(superSizedFrameTemp);
minDistancesBuffer.Dispose();
maxDistanceBuffer.Dispose();
DestroyImmediate(camera.gameObject, true);
//restore layers
RestoreLayers(originalLayers);
//restore lights
var enumerator2 = originalLights.Keys.GetEnumerator();
while (enumerator2.MoveNext())
{
var light = enumerator2.Current;
if (light != null)
{
light.enabled = originalLights[light];
}
}
enumerator2.Dispose();
originalLights.Clear();
var savePath = "";
var file = "";
var filePrefab = "";
if (imposter.AssetReference != null)
{
savePath = AssetDatabase.GetAssetPath(imposter.AssetReference);
var lastSlash = savePath.LastIndexOf("/", StringComparison.Ordinal);
var folder = savePath.Substring(0, lastSlash);
file = savePath.Substring(lastSlash + 1, savePath.LastIndexOf(".", StringComparison.Ordinal) - lastSlash - 1);
filePrefab = file;
savePath = folder + "/" + file + "_Imposter" + ".asset";
}
else //no prefab, ask where to save
{
file = root.name;
savePath = EditorUtility.SaveFilePanelInProject("Save Billboard Imposter", file + "_Imposter", "asset", "Select save location");
}
imposter.PrefabSuffix = _suffix;
imposter.name = file;
AssetDatabase.CreateAsset(imposter, savePath);
imposter.Save(savePath, file, _createUnityBillboard);
//spawn
var spawned = imposter.Spawn(root.position, true, filePrefab);
spawned.transform.position = root.position + new Vector3(2f, 0f, 2f);
spawned.transform.rotation = root.rotation;
spawned.transform.localScale = originalScale;
root.localScale = originalScale;
return(true);
}
