Using ray tracing for real time audio synthesis
First Claim
Patent Images
1. A method of simulating sound in a three-dimensional scene, comprising:
- generating a sound event at a first location in the three-dimensional scene;
issuing at least two rays into the three-dimensional scene originating from the first location, the at least two rays emulating a sound wave generated by the sound event,wherein a direct ray of the at least two rays has a trajectory directed towards a second location within the three-dimensional scene and wherein an indirect ray of the at least two rays has a trajectory different than the trajectory of the direct ray;
performing ray tracing with the at least two rays using a spatial index having branches and nodes corresponding to bounding volumes which partition the three-dimensional scene;
based on the results of ray tracing the at least two rays through the three-dimensional scene, determining a resulting sound at the second location; and
generating an output signal used to generate the resulting sound.
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Abstract
According to embodiments of the invention, a sound engine may determine a final sound at a listener location by emulating sound waves within a three-dimensional scene. The sound engine may emulate sound waves by issuing rays from a location of a sound event and tracing the rays through the three-dimensional scene. The rays may intersect objects within the three-dimensional scene which have sound modification factors. The sound modification factors and other factors (e.g., distance traveled by the ray, angle of intersection with the object, etc.) may be applied to the sound event to determine a final sound which is heard by the listener.
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Citations
20 Claims
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1. A method of simulating sound in a three-dimensional scene, comprising:
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generating a sound event at a first location in the three-dimensional scene; issuing at least two rays into the three-dimensional scene originating from the first location, the at least two rays emulating a sound wave generated by the sound event, wherein a direct ray of the at least two rays has a trajectory directed towards a second location within the three-dimensional scene and wherein an indirect ray of the at least two rays has a trajectory different than the trajectory of the direct ray; performing ray tracing with the at least two rays using a spatial index having branches and nodes corresponding to bounding volumes which partition the three-dimensional scene; based on the results of ray tracing the at least two rays through the three-dimensional scene, determining a resulting sound at the second location; and generating an output signal used to generate the resulting sound. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A non-transitory computer readable medium containing a program which, when executed, performs operations comprising:
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generating a sound event at a first location in a three-dimensional scene; issuing at least two rays into the three-dimensional scene originating from the first location, the at least two rays emulating a sound wave generated by the sound event, wherein a direct ray of the at least two rays has a trajectory directed towards a second location within the three-dimensional scene and wherein an indirect ray of the at least two rays has a trajectory different than the trajectory of the direct ray; performing ray tracing with the at least two rays using a spatial index having branches and nodes corresponding to bounding volumes which partition the three-dimensional scene; and based on the results of ray tracing the at least two rays through the three-dimensional scene, determining a resulting sound at the second location. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A system, comprising:
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a memory device containing a spatial index having nodes which correspond to bounding volumes which partition a three-dimensional scene; and a processing element configured to; issue at least one two rays into the three-dimensional scene originating from a first location corresponding to a sound event, the at least two rays emulating a sound wave generated by the sound event, wherein a direct ray of the at least two rays has a trajectory directed towards a second location within the three-dimensional scene and wherein an indirect ray of the at least two rays has a trajectory different than the trajectory of the direct ray, perform ray tracing with the at least two rays using a spatial index having branches and nodes corresponding to bounding volumes which partition the three-dimensional scene, and based on the results of ray tracing the at least two rays through the three-dimensional scene, determine a resulting sound at the second location. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification