Three-dimensional shadows cast by objects
First Claim
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1. A computer-implemented method comprising:
- displaying an object on a page of a digital book over a background on a screen of an electronic device; and
displaying a shadow effect for the object on the screen of the electronic device, comprising;
simulating a three-dimensional (3D) environment encompassing the object;
simulating a light source at a specific position within the simulated 3D environment;
simulating a shadow cast by the object on the page as a result of the light source shining on the page in the simulated 3D environment; and
rendering the shadow on the screen of the electronic device;
wherein when the object is manipulated to be folded in the 3D environment such that at least a first portion of the object faces the light source and at least a second portion of the object faces away from the light source, the object is rotated such that a greater portion of the first portion that faces the light source is displayed on the screen, and a smaller portion of the second portion that faces away from the light source is displayed on the screen.
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Abstract
Particular embodiments display an object over a background on a screen of an electronic device; and display a shadow effect for the object on the screen of the electronic device, including simulating a three-dimensional (3D) environment encompassing the object; simulating a light source at a specific position within the simulated 3D environment; simulating a shadow cast by the object on the background as a result of the light source shining on the object in the simulated 3D environment; and rendering the shadow on the screen of the electronic device.
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Citations
20 Claims
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1. A computer-implemented method comprising:
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displaying an object on a page of a digital book over a background on a screen of an electronic device; and displaying a shadow effect for the object on the screen of the electronic device, comprising; simulating a three-dimensional (3D) environment encompassing the object; simulating a light source at a specific position within the simulated 3D environment; simulating a shadow cast by the object on the page as a result of the light source shining on the page in the simulated 3D environment; and rendering the shadow on the screen of the electronic device; wherein when the object is manipulated to be folded in the 3D environment such that at least a first portion of the object faces the light source and at least a second portion of the object faces away from the light source, the object is rotated such that a greater portion of the first portion that faces the light source is displayed on the screen, and a smaller portion of the second portion that faces away from the light source is displayed on the screen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. One or more computer-readable non-transitory storage media embodying software that is operable when executed by one or more processors to:
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display an object of a digital book over a background on a screen of an electronic device; and display a shadow effect for the object on the screen of the electronic device, comprising; simulate a three-dimensional (3D) environment encompassing the object on the page; simulate a light source at a specific position within the simulated 3D environment; simulate a shadow cast by the object on the page as a result of the light source shining on the page in the simulated 3D environment; and render the shadow on the screen of the electronic device; wherein when the object is manipulated to be folded in the 3D environment such that at least a first portion of the object faces the light source and at least a second portion of the object faces away from the light source, the object is rotated such that a greater portion of the first portion that faces the light source is displayed on the screen, and a smaller portion of the second portion that faces away from the light source is displayed on the screen. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A system comprising:
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one or more processors; and a memory coupled to the processors comprising instructions executable by the processors, the processors operable when executing the instructions to; display an object on a page of a digital book over a background on a screen of an electronic device; and display a shadow effect for the object on the screen of the electronic device, comprising; simulate a three-dimensional (3D) environment encompassing the object; simulate a light source at a specific position within the simulated 3D environment; simulate a shadow cast by the object on the page as a result of the light source shining on the page in the simulated 3D environment; and render the shadow on the screen of the electronic device; wherein when the object is manipulated to be folded in the 3D environment such that at least a first portion of the object faces the light source and at least a second portion of the object faces away from the light source, the object is rotated such that a greater portion of the first portion that faces the light source is displayed on the screen, and a smaller portion of the second portion that faces away from the light source is displayed on the screen. - View Dependent Claims (18, 19, 20)
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Specification