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Modify humanoid dimensions for calculation of drag

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This commit is contained in:
Ludvig Böklin 2021-05-19 19:58:38 +02:00
parent b1a2b21900
commit 8ba1b16982
1 changed files with 3 additions and 1 deletions
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4
common/src/comp/fluid_dynamics.rs
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@ -184,13 +184,15 @@ impl Body {
/// Skin friction is the drag arising from the shear forces between a fluid /// Skin friction is the drag arising from the shear forces between a fluid
/// and a surface, while pressure drag is due to flow separation. Both are /// and a surface, while pressure drag is due to flow separation. Both are
/// viscous effects. /// viscous effects.
///
/// This coefficient includes the reference area.
fn parasite_drag_coefficient(&self, wings: Option<&Wings>) -> f32 { fn parasite_drag_coefficient(&self, wings: Option<&Wings>) -> f32 {
// Reference area and drag coefficient assumes best-case scenario of the // Reference area and drag coefficient assumes best-case scenario of the
// orientation producing least amount of drag // orientation producing least amount of drag
match self { match self {
// Cross-section, head/feet first // Cross-section, head/feet first
Body::BipedLarge(_) | Body::BipedSmall(_) | Body::Golem(_) | Body::Humanoid(_) => { Body::BipedLarge(_) | Body::BipedSmall(_) | Body::Golem(_) | Body::Humanoid(_) => {
let dim = self.dimensions().xy().map(|a| a * 0.5); let dim = self.dimensions().xy().map(|a| 0.7 * a * 0.5);
const CD: f32 = 0.7; const CD: f32 = 0.7;
CD * PI * dim.x * dim.y CD * PI * dim.x * dim.y
}, },