Starting switch to bounding sphere

2024-03-29 08:49:03 +01:00
parent 05eff8ca6f
commit 82baf898a6
2 changed files with 28 additions and 3 deletions
@@ -0,0 +1,56 @@
+import Common;
+
+struct BoundingSphere
+{
+    float4 centerRadius;
+    float3 getCenter()
+    {
+        return centerRadius.xyz;
+    }
+    float getRadius()
+    {
+        return centerRadius.w;
+    }
+    bool pointInside(float3 p)
+    {
+        if(abs(getCenter() - p) > getRadius())
+        {
+            return false;
+        }
+        return true;
+    }
+    bool insideFrustum(float4x4 transform, Frustum frustum)
+    {
+        
+    }
+};
+
+struct AABB
+{
+	float3 min;
+    float pad0;
+	float3 max;
+    float pad1;
+	bool insideFrustum(float4x4 transform, Frustum frustum)
+	{
+		float4 corners[8];
+        corners[0] = mul(transform, float4(min.x, min.y, min.z, 1.0f));
+        corners[1] = mul(transform, float4(min.x, min.y, max.z, 1.0f));
+        corners[2] = mul(transform, float4(min.x, max.y, min.z, 1.0f));
+        corners[3] = mul(transform, float4(min.x, max.y, max.z, 1.0f));
+        corners[4] = mul(transform, float4(max.x, min.y, min.z, 1.0f));
+        corners[5] = mul(transform, float4(max.x, min.y, max.z, 1.0f));
+        corners[6] = mul(transform, float4(max.x, max.y, min.z, 1.0f));
+        corners[7] = mul(transform, float4(max.x, max.y, max.z, 1.0f));
+        for(int i = 0; i < 8; ++i)
+        {
+            float3 adjusted = corners[i].xyz / corners[i].w;
+            if(frustum.pointInside(adjusted))
+            {
+                return true;
+            }
+            
+        }
+        return false;
+	}
+};