void OnGUI()
{
if (_showFPS)
{
float msec = fpsDeltaTime * 1000.0f;
float fps = 1.0f / fpsDeltaTime;
// Show FPS counter
GUILayout.BeginArea(GUIUtils.GetCornerRect(ScreenCorner.BottomRight, 100, 25, new Vector2(15 + fpsTexture.width, 10)));
GUILayout.Label(string.Format("{0:0.}fps ({1:0.0}ms)", fps, msec), new GUIStyle("label")
{
alignment = TextAnchor.MiddleLeft
});
GUILayout.EndArea();
if (fpsTexture == null)
{
return;
}
// Show FPS history
Color[] colors = new Color[fpsTexture.width * fpsTexture.height];
for (int i = 0; i < (fpsTexture.width * fpsTexture.height); i++)
{
colors[i] = new Color(0.0f, 0.0f, 0.0f, 0.66f); // Half-transparent background for FPS graph
}
fpsTexture.SetPixels(colors);
// Append to history storage
fpsHistory[fpsIndex] = fps;
int f = fpsIndex;
if (fps > fpsHistory.Average())
{
fpsMaximum = fps;
}
// Draw graph into texture
for (int i = fpsTexture.width - 1; i >= 0; i--)
{
float graphVal = (fpsHistory[f] > fpsMaximum) ? fpsMaximum : fpsHistory[f]; //Clamps
int height = (int)(graphVal * fpsTexture.height / (fpsMaximum + 0.1f)); //Returns the height of the desired point with a padding of 0.1f units
float p = fpsHistory[f] / fpsMaximum,
r = Mathf.Lerp(1, 1 - p, p),
g = Mathf.Lerp(p * 2, p, p);
fpsTexture.SetPixel(i, height, new Color(r, g, 0));
f--;
if (f < 0)
{
f = fpsHistory.Length - 1;
}
}
// Next entry in rolling history buffer
fpsIndex++;
if (fpsIndex >= fpsHistory.Length)
{
fpsIndex = 0;
}
// Draw texture on GUI
fpsTexture.Apply(false, false);
GUI.DrawTexture(GUIUtils.GetCornerRect(ScreenCorner.BottomRight, fpsTexture.width, fpsTexture.height, new Vector2(5, fpsTexture.height - 15)), fpsTexture);
}
}