当太阳光投射到没有经过技术处理的窗户，太阳光的热量和光线全部进入到了室内。
When sunlight shines through the untreated window, it provides both light and heat.
充分的实验结果表明本文的算法达到了和传统光线投射算法相媲美的图像质量和相当高的绘制速度。
Sufficient experimentation shows that we could reach a good frame rate and a satisfied image quality, which could be compared to the result of ray casting.
把图像处理、光线投射与包围体技术有机结合，提出了一种提高成像质量和速度的三维可视化新方法。
A novel method for 3d visualization with improved image quality and speed has been developed by closely combined use of image processing, ray casting and bounding box technology.
最后，将处理后的水体和地层数据合并，并通过直接体绘制中的光线投射算法有效地实现了水声体数据的三维可视化。
Finally, the processed water and seafloor data is combined, and then the visualization of SAS volume data is achieved by the ray casting algorithm of direct volume rendering.
他们急切地想把一天中不同时间投射到物体上的光线和阴影呈呈现出来。
They were eager to show how light and shadow fell on objects at different times of day.
采用改进的光线投射法渲染烟雾和云，并将整个运算映射到GPU。
We adopt improved Ray-Casting to render smoke and cloud and map the entire arithmetic process to GPU.
光线投射法是一种重要的体绘制算法，但直线上采样点的确定和采样值计算是非常费时的，也是影响体绘制实时性的重要因素。
Ray casting is an important algorithm in direct volume rendering, but it has the disadvantages of the large amount of computation and inefficient computation of sampling-points.
光线投射法是一种重要的体绘制算法，但直线上采样点的确定和采样值计算是非常费时的，也是影响体绘制实时性的重要因素。
Ray casting is an important algorithm in direct volume rendering, but it has the disadvantages of the large amount of computation and inefficient computation of sampling-points.
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