55 lines
1.3 KiB
Plaintext
55 lines
1.3 KiB
Plaintext
import Common;
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struct BoundingSphere
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{
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float4 centerRadius;
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float3 getCenter()
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{
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return centerRadius.xyz;
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}
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float getRadius()
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{
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return centerRadius.w;
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}
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bool insideFrustum(Frustum frustum)
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{
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bool result = true;
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for(int i = 0; i < 4 && result; ++i)
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{
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if(dot(frustum.sides[i].n, centerRadius.xyz) - frustum.sides[i].d < -getRadius())
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{
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result = false;
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}
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}
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return result;
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}
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};
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struct AABB
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{
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float3 min;
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float pad0;
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float3 max;
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float pad1;
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// modified version from https://learnopengl.com/Guest-Articles/2021/Scene/Frustum-Culling
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bool insideFrustum(Frustum frustum)
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{
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float3 center = (min + max) * 0.5;
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float3 extents = float3(max.x - center.x, max.y - center.y, max.z - center.z);
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bool result = true;
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for(int i = 0; i < 4 && result; ++i)
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{
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const float r = extents.x * abs(frustum.sides[i].n.x)
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+ extents.y * abs(frustum.sides[i].n.y)
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+ extents.z * abs(frustum.sides[i].n.z);
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const float signedDistance = dot(frustum.sides[i].n, center) - frustum.sides[i].d;
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if(signedDistance < -r)
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{
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result = false;
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}
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}
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return result;
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}
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};
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