Цифровое моделирование на C#. Дмитрий ПавловЧитать онлайн книгу.

острым). Это условие может быть сформулировано по другому – треугольник виден наблюдателю в случае, если скалярное произведение вектора нормали и вектора, направленного на наблюдателя, больше нуля. Если для определенности предположить, что вектор на наблюдателя имеет следующие координаты (0, 0, -1), то условие видимости треугольника принимает очень простой вид: треугольник виден наблюдателю тогда и только тогда, когда Z-координата его вектора нормали меньше нуля.

Конец ознакомительного фрагмента.

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