Minor changes

2026-03-13 22:30:46 +01:00
parent 661c91401f
commit df5b2b6795
5 changed files with 51 additions and 62 deletions
@@ -0,0 +1,47 @@
+struct Plane
+{
+    float4 nd;
+    float3 getNormal()
+    {
+        return nd.xyz;
+    }
+    float getDistance()
+    {
+        return nd.w;
+    }
+    bool pointInside(float3 point)
+    {
+        return dot(getNormal(), point) - getDistance() > 0.0f;
+    }
+};
+
+struct Frustum
+{
+    Plane sides[4];
+    bool pointInside(float3 point)
+    {
+        for(int p = 0; p < 4; ++p)
+        {
+            if(!sides[p].pointInside(point))
+            {
+                return false;
+            }
+        }
+        return true;
+    }
+};
+Plane computePlane(float3 p0, float3 p1, float3 p2)
+{
+    Plane plane;
+
+    float3 v0 = p1 - p0;
+    float3 v2 = p2 - p0;
+
+    float3 n = normalize(cross(v0, v2));
+
+    float d = dot(n, p0);
+
+    plane.nd = float4(n, d);
+
+    return plane;
+}