52 lines
1.2 KiB
HLSL
52 lines
1.2 KiB
HLSL
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#ifndef COLLISIONMETHODS_HLSL
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#define COLLISIONMETHODS_HLSL
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struct Sphere
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{
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float3 center;
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float radius;
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};
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struct Plane
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{
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float3 normal;
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float phasing;
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};
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struct Frustrum
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{
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Plane leftPlane, rightPlane, bottomPlane, topPlane, nearPlane, farPlane;
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};
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bool intersects( uniform Frustrum f, uniform Sphere s )
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{
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float connectOffset;
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connectOffset = dot( f.leftPlane.normal, s.center );
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connectOffset += f.leftPlane.phasing;
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if( connectOffset < -s.radius ) return false;
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connectOffset = dot( f.rightPlane.normal, s.center );
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connectOffset += f.rightPlane.phasing;
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if( connectOffset < -s.radius ) return false;
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connectOffset = dot( f.bottomPlane.normal, s.center );
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connectOffset += f.bottomPlane.phasing;
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if( connectOffset < -s.radius ) return false;
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connectOffset = dot( f.topPlane.normal, s.center );
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connectOffset += f.topPlane.phasing;
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if( connectOffset < -s.radius ) return false;
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connectOffset = dot( f.nearPlane.normal, s.center );
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connectOffset += f.nearPlane.phasing;
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if( connectOffset < -s.radius ) return false;
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connectOffset = dot( f.farPlane.normal, s.center );
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connectOffset += f.farPlane.phasing;
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if( connectOffset < -s.radius ) return false;
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return true;
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}
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#endif
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