tracer: image.impl Source File

00001 /*
00002  * Implementation of ImageBuffer
00003  */
00004 
00005 template <unsigned int n>
00006 ImageBuffer<n>::ImageBuffer (unsigned int ndims[n]) {
00007     assert (n > 0);
00008     for (unsigned int i = 0; i < n; i ++) {
00009         dims[i] = ndims[i];
00010         assert (dims[i] > 0);
00011     }
00012     count[n] = 1;
00013     for (unsigned int i = n; i > 0; i --)
00014         count[i-1] = count[i] * dims[i-1];
00015     data = new Color[count[0]];
00017     assert (data != NULL);
00018 }
00019 
00020 template <unsigned int n>
00021 unsigned int ImageBuffer<n>::getSize (unsigned int d) const {
00022     assert (d < n);
00023     return dims[d];
00024 }
00025 
00026 template <unsigned int n>
00027 const Color& ImageBuffer<n>::getColor (unsigned int pos[n]) const {
00028     int offset = 0;
00029     for (unsigned int i = 0; i < n; i ++) {
00030         assert (pos[i] < dims[i]);
00031         offset += count[i+1] * pos[i];
00032     }
00033     return data[offset];
00034 }
00035 
00036 template <unsigned int n>
00037 void ImageBuffer<n>::setColor (unsigned int pos[n], const Color &c) {
00038     int offset = 0;
00039     for (unsigned int i = 0; i < n; i ++) {
00040         assert (pos[i] < dims[i]);
00041         offset += count[i+1] * pos[i];
00042     }
00043     data[offset] = c;
00044 }