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17 lines
416 B
Text
17 lines
416 B
Text
function d3_normalize(vec) {
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var vx = vec[0], vy = vec[1], vz = vec[2];
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var mag = sqrt(vx * vx + vy * vy + vz * vz);
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vec[0] = vx / mag;
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vec[1] = vy / mag;
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vec[2] = vz / mag;
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return vec;
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}
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function d3_cross_product(a, b, result) {
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var ax = a[0], ay = a[1], az = a[2],
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bx = b[0], by = b[1], bz = b[2];
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result[@ 0] = ay * bz - az * by;
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result[@ 1] = az * bx - ax * bz;
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result[@ 2] = ax * by - ay * bx;
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}
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