| 摘要 |
A method, an apparatus, and a computer program product render a multi-dimensional digital image using raytracing in a multi-dimensional space. Variables of a multi-dimensional digital differential analyzer (DDA) are set up using multiplications only. For each axis of the multi-dimensional space, a numerator holds the progress within a cell along that axis and a denominator describes a size condition causing the DDA to step to a next cell. For a vector, a denominator of the vector for an axis is equal to a delta for a vector component, excluding the component of said axis, for two dimensions; and a product of deltas for all vector components, excluding the component of said axis, for greater than two dimensions.
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