bool copyAndFillOperation(OctreeElement* element, void* extraData) {
VoxelTreeElement* voxel = (VoxelTreeElement*)element;
copyAndFillArgs* args = (copyAndFillArgs*)extraData;
char outputMessage[128];
args->inCount++;
int percentDone = (100*args->inCount/args->originalCount);
// For each leaf node...
if (voxel->isLeaf()) {
// create a copy of the leaf in the copy destination
float x = voxel->getCorner().x;
float y = voxel->getCorner().y;
float z = voxel->getCorner().z;
float s = voxel->getScale();
unsigned char red = voxel->getTrueColor()[RED_INDEX];
unsigned char green = voxel->getTrueColor()[GREEN_INDEX];
unsigned char blue = voxel->getTrueColor()[BLUE_INDEX];
bool destructive = true;
args->destinationTree->createVoxel(x, y, z, s, red, green, blue, destructive);
args->outCount++;
sprintf(outputMessage,"Completed: %d%% (%lu of %lu) - Creating voxel %lu at [%f,%f,%f,%f]",
percentDone,args->inCount,args->originalCount,args->outCount,x,y,z,s);
printf("%s",outputMessage);
for (int b = 0; b < strlen(outputMessage); b++) {
printf("\b");
}
// and create same sized leafs from this leaf voxel down to zero in the destination tree
for (float yFill = y-s; yFill >= 0.0f; yFill -= s) {
args->destinationTree->createVoxel(x, yFill, z, s, red, green, blue, destructive);
args->outCount++;
sprintf(outputMessage,"Completed: %d%% (%lu of %lu) - Creating fill voxel %lu at [%f,%f,%f,%f]",
percentDone,args->inCount,args->originalCount,args->outCount,x,y,z,s);
printf("%s",outputMessage);
for (int b = 0; b < strlen(outputMessage); b++) {
printf("\b");
}
}
}
return true;
}
// will average the child colors...
void VoxelTreeElement::calculateAverageFromChildren() {
int colorArray[4] = {0,0,0,0};
float density = 0.0f;
for (int i = 0; i < NUMBER_OF_CHILDREN; i++) {
VoxelTreeElement* childAt = getChildAtIndex(i);
if (childAt && childAt->isColored()) {
for (int j = 0; j < 3; j++) {
colorArray[j] += childAt->getTrueColor()[j]; // color averaging should always be based on true colors
}
colorArray[3]++;
}
if (childAt) {
density += childAt->getDensity();
}
}
density /= (float) NUMBER_OF_CHILDREN;
//
// The VISIBLE_ABOVE_DENSITY sets the density of matter above which an averaged color voxel will
// be set. It is an important physical constant in our universe. A number below 0.5 will cause
// things to get 'fatter' at a distance, because upward averaging will make larger voxels out of
// less data, which is (probably) going to be preferable because it gives a sense that there is
// something out there to go investigate. A number above 0.5 would cause the world to become
// more 'empty' at a distance. Exactly 0.5 would match the physical world, at least for materials
// that are not shiny and have equivalent ambient reflectance.
//
const float VISIBLE_ABOVE_DENSITY = 0.10f;
nodeColor newColor = { 0, 0, 0, 0};
if (density > VISIBLE_ABOVE_DENSITY) {
// The density of material in the space of the voxel sets whether it is actually colored
for (int c = 0; c < 3; c++) {
// set the average color value
newColor[c] = colorArray[c] / colorArray[3];
}
// set the alpha to 1 to indicate that this isn't transparent
newColor[3] = 1;
}
// Set the color from the average of the child colors, and update the density
setColor(newColor);
setDensity(density);
}