57 lines
1.5 KiB
C
57 lines
1.5 KiB
C
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#include "CgeMath.h"
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#include <string.h>
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#define EPSILON 0.00001f
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#define PI 3.14159265358979323846f
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void CgeBox3fUnion(const float aMin[3], const float aMax[3],
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const float bMin[3], const float bMax[3],
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float outMin[3], float outMax[3]) {
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CgeVec3fMin(aMin, bMin, outMin);
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CgeVec3fMax(aMax, bMax, outMax);
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}
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int CgeBox3fIntersect(const float aMin[3], const float aMax[3],
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const float bMin[3], const float bMax[3],
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float outMin[3], float outMax[3]) {
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CgeVec3fMax(aMin, bMin, outMin);
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CgeVec3fMin(aMax, bMax, outMax);
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if (outMin[0] >= outMax[0] || outMin[1] >= outMax[1] || outMin[2] >= outMax[2])
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return 0;
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return 1;
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}
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int CgeBox3fContains(const float aMin[3], const float aMax[3],
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const float point[3]) {
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if (point[0] < aMin[0] || point[1] < aMin[1] || point[2] < aMin[2])
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return 0;
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if (point[0] > aMax[0] || point[1] > aMax[1] || point[2] > aMax[2])
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return 0;
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return 1;
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}
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int CgeBox3fEnclose(const float *points, size_t size, float outMin[3],
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float outMax[3]) {
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float tmp1[3], tmp2[3];
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size_t i;
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if (!size)
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return 0;
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memcpy(tmp1, points, sizeof(tmp1));
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memcpy(tmp2, points, sizeof(tmp2));
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for (i = 1; i < size; i++) {
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CgeVec3fMin(tmp1, points + i * 3, tmp1);
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CgeVec3fMax(tmp2, points + i * 3, tmp2);
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}
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memcpy(outMin, tmp1, sizeof(tmp1));
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memcpy(outMax, tmp2, sizeof(tmp2));
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return 1;
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}
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