public virtual void OnSceneGUI()
{
if (!target)
{
return;
}
var c = (Camera)target;
if (!CameraEditorUtils.IsViewportRectValidToRender(c.rect))
{
return;
}
Vector2 currentMainGameViewTargetSize = PreviewEditorWindow.GetMainPreviewTargetSize();
if (s_PreviousMainGameViewTargetSize != currentMainGameViewTargetSize)
{
// a gameView size change can affect horizontal FOV, refresh the inspector when that happens.
Repaint();
s_PreviousMainGameViewTargetSize = currentMainGameViewTargetSize;
}
SceneViewOverlay.Window(EditorGUIUtility.TrTextContent("Camera Preview"), OnOverlayGUI, (int)SceneViewOverlay.Ordering.Camera, target, SceneViewOverlay.WindowDisplayOption.OneWindowPerTarget);
CameraEditorUtils.HandleFrustum(c, referenceTargetIndex);
}
internal static float GetGameViewAspectRatio()
{
Vector2 gameViewSize = PreviewEditorWindow.GetMainPreviewTargetSize();
if (gameViewSize.x < 0f)
{
// Fallback to Scene View of not a valid game view size
gameViewSize.x = Screen.width;
gameViewSize.y = Screen.height;
}
return(gameViewSize.x / gameViewSize.y);
}
internal static Vector2 GetMainPreviewSize()
{
return(PreviewEditorWindow.GetMainPreviewTargetSize());
}
public virtual void OnOverlayGUI(Object target, SceneView sceneView)
{
if (target == null)
{
return;
}
var c = (Camera)target;
// Do not render the Camera Preview overlay if the target camera is not part of the stage the SceneView is rendering
var targetStage = StageUtility.GetStageHandle(c.gameObject);
var sceneViewStage = StageUtility.GetStageHandle(sceneView.customScene);
if (targetStage != sceneViewStage)
{
return;
}
Vector2 previewSize = c.targetTexture ? new Vector2(c.targetTexture.width, c.targetTexture.height) : PreviewEditorWindow.GetMainPreviewTargetSize();
if (previewSize.x < 0f)
{
// Fallback to Scene View of not a valid game view size
previewSize.x = sceneView.position.width;
previewSize.y = sceneView.position.height;
}
// Apply normalizedviewport rect of camera
Rect normalizedViewPortRect = c.rect;
// clamp normalized rect in [0,1]
normalizedViewPortRect.xMin = Math.Max(normalizedViewPortRect.xMin, 0f);
normalizedViewPortRect.yMin = Math.Max(normalizedViewPortRect.yMin, 0f);
normalizedViewPortRect.xMax = Math.Min(normalizedViewPortRect.xMax, 1f);
normalizedViewPortRect.yMax = Math.Min(normalizedViewPortRect.yMax, 1f);
previewSize.x *= Mathf.Max(normalizedViewPortRect.width, 0f);
previewSize.y *= Mathf.Max(normalizedViewPortRect.height, 0f);
// Prevent using invalid previewSize
if (previewSize.x < 1f || previewSize.y < 1f)
{
return;
}
float aspect = previewSize.x / previewSize.y;
// Scale down (fit to scene view)
previewSize.y = kPreviewNormalizedSize * sceneView.position.height;
previewSize.x = previewSize.y * aspect;
if (previewSize.y > sceneView.position.height * 0.5f)
{
previewSize.y = sceneView.position.height * 0.5f;
previewSize.x = previewSize.y * aspect;
}
if (previewSize.x > sceneView.position.width * 0.5f)
{
previewSize.x = sceneView.position.width * 0.5f;
previewSize.y = previewSize.x / aspect;
}
// Get and reserve rect
Rect cameraRect = GUILayoutUtility.GetRect(previewSize.x, previewSize.y);
if (Event.current.type == EventType.Repaint)
{
// setup camera and render
previewCamera.CopyFrom(c);
// make sure the preview camera is rendering the same stage as the SceneView is
previewCamera.scene = sceneView.customScene;
// also make sure to sync any Skybox component on the preview camera
var dstSkybox = previewCamera.GetComponent <Skybox>();
if (dstSkybox)
{
var srcSkybox = c.GetComponent <Skybox>();
if (srcSkybox && srcSkybox.enabled)
{
dstSkybox.enabled = true;
dstSkybox.material = srcSkybox.material;
}
else
{
dstSkybox.enabled = false;
}
}
var previewTexture = GetPreviewTextureWithSize((int)cameraRect.width, (int)cameraRect.height);
previewTexture.antiAliasing = Mathf.Max(1, QualitySettings.antiAliasing);
previewCamera.targetTexture = previewTexture;
previewCamera.pixelRect = new Rect(0, 0, cameraRect.width, cameraRect.height);
Handles.EmitGUIGeometryForCamera(c, previewCamera);
if (c.usePhysicalProperties)
{
// when sensor size is reduced, the previous frame is still visible behing so we need to clear the texture before rendering.
RenderTexture rt = RenderTexture.active;
RenderTexture.active = previewTexture;
GL.Clear(false, true, Color.clear);
RenderTexture.active = rt;
}
previewCamera.Render();
Graphics.DrawTexture(cameraRect, previewTexture, new Rect(0, 0, 1, 1), 0, 0, 0, 0, GUI.color, EditorGUIUtility.GUITextureBlit2SRGBMaterial);
}
}
