Trees don't sway correctly

FlightGear Flight Simulator: free open-source multiplatform flight sim

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#1790 Trees don't sway correctly

Milestone: None

Status: Invalid

Owner: Thorsten Renk

Labels: Weather (49) Shader (14) Enhancement (35)

Priority: Low

Updated: 2018-10-01

Created: 2015-08-31

Creator: Mihajlo

Private: No

Use advanced weather and select manual input or stormy monday. Trees still sway if your wind speed is 0kt or sway very little if you have 30kt wind. I have live weather turned on.
OS:Windows 10
GPU:Nvidia GTX650
FGFS version:3.7.0 build 2030

Discussion

Gijs - 2015-09-23

assigned_to: Thorsten Renk
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xDraconian - 2018-09-30

labels: --> Weather, Shader
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xDraconian - 2018-09-30

labels: Weather, Shader --> Weather, Shader, Enhancement
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Mihajlo - 2018-09-30

Tested again and this bug is still present. The wind was 11kt (CAVOK) and when I changed the wind setting to 0kt (calm) the trees and grass were still swaying.

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Mihajlo - 2018-09-30

On second thought this may not be a bug. The tree swaying seems to gradually slow down, after speed change. Now they are not moving anymore. Maybe because of interpolation.

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xDraconian - 2018-09-30

status: New --> Verified
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Thorsten Renk - 2018-10-01

status: Verified --> Invalid
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Thorsten Renk - 2018-10-01

For wind effects visible on the surface (waves, tree motion) FG never uses the instantaneous wind at aircraft position but a long-time filtered average wind to avoid artifacts.

If you change wind instantaneously, you'll have to wait up to a few minutes for the correct behavior to show.

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Mihajlo - 2018-10-01

Yes, that's what I thought, but when I made a ticket I didn't know this. I only realized this yesterday.

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