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Fix turbulence_noise_scale for Particle Turbulence #77631

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May 31, 2023
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Fix turbulence_noise_scale for Particle Turbulence #77631

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6 changes: 5 additions & 1 deletion scene/resources/particle_process_material.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1356,7 +1356,11 @@ float ParticleProcessMaterial::get_turbulence_noise_strength() const {

void ParticleProcessMaterial::set_turbulence_noise_scale(float p_turbulence_noise_scale) {
turbulence_noise_scale = p_turbulence_noise_scale;
float shader_turbulence_noise_scale = (pow(p_turbulence_noise_scale, 0.25) * 5.6234 / 10.0) * 4.0 - 3.0;
const float noise_frequency_when_slider_is_zero = 4.0;
const float max_slider_value = 10.0;
const float curve_exponent = 0.25;
const float curve_rescale = noise_frequency_when_slider_is_zero / pow(max_slider_value, curve_exponent);
float shader_turbulence_noise_scale = pow(p_turbulence_noise_scale, curve_exponent) * curve_rescale - noise_frequency_when_slider_is_zero;
RenderingServer::get_singleton()->material_set_param(_get_material(), shader_names->turbulence_noise_scale, shader_turbulence_noise_scale);
}

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