| 摘要 |
An image generation apparatus, method and recording medium capable of expressing natural shadows with respect to changes of the motion of the character and creating shadows with less load on the CPU. It is possible to express a natural shadow with respect to changes of a motion of a character by changing density, degree of transparency and scale of a shadow object according to the positional relationship, speed relationship between a three-dimensional body and topographical object or environment surrounding the observing point etc. Even if the character has at least two legs (reference legs) and moves these legs, it is possible to determine the scale of the shadow object after the motion and display the shadow object based on desired reference points. The reference points can be obtained by assigning predetermined weights to a projection point Pc of a lumbar part c parallel-projected onto a topographical object, a projection point Pa corresponding to a right leg a and a projection point Pb corresponding to a left leg b.
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