Initial commit

Assets/Materials/Scripts/ObjectAirProperties.cs

@@ -0,0 +1,90 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class ObjectAirProperties : MonoBehaviour
+{
+    [Header("Âëàñòèâîñò³")]
+    public float crossSectionArea = 0.05f;
+    public float dragCoefficient = 0.47f;
+
+    void Start()
+    {
+        AnalyzeObject();
+    }
+
+    void AnalyzeObject()
+    {
+        Renderer renderer = GetComponent<Renderer>();
+        if (renderer == null) return;
+
+        Bounds bounds = renderer.bounds;
+        Vector3 size = bounds.size;
+        float[] dimensions = new float[] { size.x, size.y, size.z };
+        System.Array.Sort(dimensions);
+        System.Array.Reverse(dimensions);
+        float largest = dimensions[0];
+        float middle = dimensions[1];
+        float smallest = dimensions[2];
+        float ratio1 = middle / largest;
+        float ratio2 = smallest / largest;
+
+        if (ratio1 > 0.8f && ratio2 > 0.8f)
+        {
+            DetectSphereOrCube(bounds);
+        }
+        else if (ratio2 < 0.3f)
+        {
+            crossSectionArea = largest * middle;
+            dragCoefficient = 1.28f;
+        }
+        else if (ratio1 > 0.7f && ratio2 < 0.7f)
+        {
+            float radius = Mathf.Max(largest, middle) * 0.5f;
+            crossSectionArea = Mathf.PI * radius * radius;
+            dragCoefficient = 0.82f;
+        }
+        else
+        {
+            crossSectionArea = Mathf.Max(
+                size.x * size.y,
+                size.x * size.z,
+                size.y * size.z
+            );
+            dragCoefficient = 1.05f;
+        }
+    }
+
+    void DetectSphereOrCube(Bounds bounds)
+    {
+        MeshFilter meshFilter = GetComponent<MeshFilter>();
+        if (meshFilter != null && meshFilter.sharedMesh != null)
+        {
+            int vertexCount = meshFilter.sharedMesh.vertexCount;
+            if (vertexCount > 100)
+            {
+                float radius = Mathf.Max(bounds.size.x, bounds.size.y, bounds.size.z) * 0.5f;
+                crossSectionArea = Mathf.PI * radius * radius;
+                dragCoefficient = 0.47f;
+            }
+            else
+            {
+                crossSectionArea = Mathf.Max(
+                    bounds.size.x * bounds.size.y,
+                    bounds.size.x * bounds.size.z,
+                    bounds.size.y * bounds.size.z
+                );
+                dragCoefficient = 1.05f;
+            }
+        }
+        else
+        {
+            crossSectionArea = Mathf.Max(
+                bounds.size.x * bounds.size.y,
+                bounds.size.x * bounds.size.z,
+                bounds.size.y * bounds.size.z
+            );
+            dragCoefficient = 1.05f;
+        }
+    }
+}