33 lines
1.4 KiB
Plaintext
33 lines
1.4 KiB
Plaintext
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// #include "res://addons/rokojori_action_library/Runtime/Shading/Library/Wind.gdshaderinc"
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#include "res://addons/rokojori_action_library/Runtime/Shading/Library/Math.gdshaderinc"
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#include "res://addons/rokojori_action_library/Runtime/Shading/Library/Transform.gdshaderinc"
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void applyWind(
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float _TIME,
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mat4 _MODEL_MATRIX,
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inout vec3 _VERTEX,
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float _windStrength,
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vec2 _windSpeed,
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float _windScale,
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sampler2D _windNoise,
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vec2 _windNoiseAngleOffset,
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vec2 _windNoiseStrengthOffset,
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float _windStart,
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float _windEnd,
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float _windWeightCurve,
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float _windHeightCompensation
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)
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{
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float _windAmount = normalizeToRange01( _VERTEX.y, _windStart, _windEnd );
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float rawWindAmount = _windAmount;
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_windAmount = mix( _windAmount, _windAmount * _windAmount, _windWeightCurve );
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vec3 worldVertex = localToWorld( _VERTEX, _MODEL_MATRIX );
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vec2 _windUV = _TIME * _windSpeed + worldVertex.xz * _windScale;
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float angle = texture( _windNoise, _windUV + _windNoiseAngleOffset).r * PI * 2.0;
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float strength = texture( _windNoise, _windUV + _windNoiseStrengthOffset ).r * _windStrength;
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vec2 circle = onCircle( angle ) * strength;
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_VERTEX = worldToLocal( worldVertex + vec3( circle.x, 0, circle.y ) * _windAmount, _MODEL_MATRIX );
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float minY = min( _VERTEX.y, 0 );
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_VERTEX.y = mix( _VERTEX.y, max( minY, _VERTEX.y - strength * _windAmount), _windHeightCompensation * 4.0f );
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}
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