摘要:
When an object is placed in the world using translations and rotations it becomes hard to find its world coordinates. In this section a simple technique to find the whereabouts in world coordinates of an object is presented. It is assumed that the object is rendered in the local origin. The techniqu
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posted @ 2013-04-13 00:55
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The spherical version is a simple extension to the cylindrical case. After the object is rotated using the cylindrical approach, all that is left to do is to tilt the object until it truly faces the camera.球体版本的广告牌是圆柱体广告牌的一个简单扩展。在使用圆柱广告牌技术将物体旋转之后,所剩下的工作就是使物体倾斜以达到真正面对照相机的效果。The axis of rotation is th
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posted @ 2013-04-13 00:52
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摘要:
True cylindrical billboarding constraints the objects rotation to an axis, as in the cheating version, but the look at vector from the object will be rotated in the camera's direction, restricted to the plane defined by the up vector, and the center of the local origin. The following image shows
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posted @ 2013-04-13 00:48
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