景物空间的镜面反射(折射)现象绘制方法

为了提高视点相关的镜面反射(折射)现象的绘制速度和绘制质量,提出了计算任意曲面反射(折射)光学映射虚物体的方法。该方法根据实际物体在反射/折射体中所成的像创建虚物体,利用图形加速硬件像处理实际三维物体一样绘制这些虚物体,将得到的关于虚物体的图像与实际反射/折射体的图像相混合,就可以得到有反射/折射效果的最终图像。实验结果表明:该方法可以克服光线跟踪方法当空间点采样不足时所带来的走样问题。该方法利用图形硬件加速,提高了绘制的速度。

Rendering reflections and refractions in object space

Geometric optical theory and the tessellate scheme were used to develop an algorithm for creating virtual optical-mapping objects for both reflections and refractions that can render specular reflections and refractions in object space. The algorithm eliminates aliasing caused by ray tracing because of under-sampling in the image space. The virtual objects are then rendered in the same way as real objects by the computer graphics hardware so the method simultaneously utilizes both the CPU and the graphics processor to achieve high performance anti-aliasing and rendering.