15 lines
356 B
C++
15 lines
356 B
C++
#include "../math.hpp"
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namespace hpr::geometry
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{
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vec2 circumCentre(vec2 p1, vec2 p2, vec2 p3)
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{
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vec2 pb1 {(p1 + p2) * 0.5};
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vec2 pb2 {(p2 + p3) * 0.5};
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scalar s1 = (p2[1] - p1[1]) / (p2[0] - p1[0]);
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scalar s2 = (p3[1] - p2[1]) / (p3[0] - p2[0]);
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return vec2(pb1[0] + s1 * pb1[1], pb2[0] + s2 * pb2[1]) * mat2(1, s1, 1, s2).inv();
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}
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} |