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In analytic geometry, a line and a sphere can intersect in three ways: 1. * No intersection at all 2. * Intersection in exactly one point 3. * Intersection in two points. Methods for distinguishing these cases, and determining the coordinates for the points in the latter cases, are useful in a number of circumstances. For example, it is a common calculation to perform during ray tracing.

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  • Line–sphere intersection (en)
  • Przecięcie prostej ze sferą (pl)
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  • In analytic geometry, a line and a sphere can intersect in three ways: 1. * No intersection at all 2. * Intersection in exactly one point 3. * Intersection in two points. Methods for distinguishing these cases, and determining the coordinates for the points in the latter cases, are useful in a number of circumstances. For example, it is a common calculation to perform during ray tracing. (en)
  • W geometrii analitycznej prosta i sfera mogą mieć część wspólną w dokładnie jednym punkcie, dwóch punktach bądź wcale. Metody rozróżniania tych przypadków i ustalania punktów przecięcia są używane jako algorytm wykonywany wielokrotnie podczas operacji śledzenia promieni. (pl)
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  • http://commons.wikimedia.org/wiki/Special:FilePath/Line-Sphere_Intersection_Cropped.png
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  • In analytic geometry, a line and a sphere can intersect in three ways: 1. * No intersection at all 2. * Intersection in exactly one point 3. * Intersection in two points. Methods for distinguishing these cases, and determining the coordinates for the points in the latter cases, are useful in a number of circumstances. For example, it is a common calculation to perform during ray tracing. (en)
  • W geometrii analitycznej prosta i sfera mogą mieć część wspólną w dokładnie jednym punkcie, dwóch punktach bądź wcale. Metody rozróżniania tych przypadków i ustalania punktów przecięcia są używane jako algorytm wykonywany wielokrotnie podczas operacji śledzenia promieni. (pl)
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