mitchellhansen/voxel-raycaster
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Octree traversal now works perfectly, edge cases worked out

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MitchellHansen
2017-03-22 00:55:10 -07:00
parent 30959128e4
commit d1b9ecd3e5
3 changed files with 38 additions and 12 deletions
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19
include/Map.h
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@@ -95,6 +95,12 @@ public:
0x1F, 0x3F, 0x7F, 0xFF
};
//uint8_t count_mask_8[8]{
// 0xFF, 0x7F, 0x3F, 0x1F,
// 0xF, 0x7, 0x3, 0x1
//};
// With a position and the head of the stack. Traverse down the voxel hierarchy to find
// the IDX and stack position of the highest resolution (maybe set resolution?) oct
bool get_voxel(sf::Vector3i position) {
@@ -195,7 +201,16 @@ public:
// We also need to traverse to the correct child pointer
// Count the number of non-leaf octs that come before and add it to the index to get the position
int count = count_bits((uint8_t)(head >> 24) ^ count_mask_8[mask_index]);
int i1 = count_bits((uint8_t)(head >> 16) & count_mask_8[0]);
int i2 = count_bits((uint8_t)(head >> 16) & count_mask_8[1]);
int i3 = count_bits((uint8_t)(head >> 16) & count_mask_8[2]);
int i4 = count_bits((uint8_t)(head >> 16) & count_mask_8[3]);
int i5 = count_bits((uint8_t)(head >> 16) & count_mask_8[4]);
int i6 = count_bits((uint8_t)(head >> 16) & count_mask_8[5]);
int i7 = count_bits((uint8_t)(head >> 16) & count_mask_8[6]);
int i8 = count_bits((uint8_t)(head >> 16) & count_mask_8[7]);
int count = count_bits((uint8_t)(head >> 16) & count_mask_8[mask_index]);
// Because we are getting the position at the first child we need to back up one
// Or maybe it's because my count bits function is wrong...
@@ -208,7 +223,7 @@ public:
} else {
// If the oct was not valid, then no CP's exists any further
// This implicitly says that if it's non-valid then it must be a leaf!!
// It appears that the traversal is now working but I need
// to focus on how to now take care of the end condition.