Hunting down some bugs and verfiying correct oct-tree traversal, not quite there yet but close

include/Map.h

@@ -84,9 +84,10 @@ public:
 	uint8_t idx_set_y_mask = 0x2;
 	uint8_t idx_set_z_mask = 0x4;
 
+	// Mask for 
 	uint8_t mask_8[8] = {
-		0x0, 0x1, 0x2, 0x3,
-		0x4, 0x5, 0x6, 0x7
+		0x1,  0x2,  0x4,  0x8,
+		0x10, 0x20, 0x40, 0x80
 	};
 
 	uint8_t count_mask_8[8]{
@@ -98,29 +99,38 @@ public:
 	// the IDX and stack position of the highest resolution (maybe set resolution?) oct
 	bool get_voxel(sf::Vector3i position) {
 
-		// Init the parent stack and push the head node
-		//std::queue<uint64_t> parent_stack;
-
+		// Init the parent stack 
 		int parent_stack_position = 0;
 		uint64_t parent_stack[32] = {0};
 		
+		// and push the head node
 		uint64_t head = block_stack.front()[stack_pos];
 		parent_stack[parent_stack_position] = head;
 		
-
 		// Get the index of the first child of the head node
 		uint64_t index = head & child_pointer_mask;
 
+		// Init the idx stack
 		uint8_t scale = 0;
 		uint8_t idx_stack[32] = {0};
 
-		// Init the idx stack
+		// Init the idx stack (DEBUG)
 		std::vector<std::bitset<3>> scale_stack(static_cast<uint64_t>(log2(OCT_DIM)));
 
-		// Set our initial dimension and the position we use to keep track what oct were in
+		// Set our initial dimension and the position at the corner of the oct to keep track of our position
 		int dimension = OCT_DIM;
 		sf::Vector3i quad_position(0, 0, 0);
 
+		// While we are not at the required resolution
+		//		Traverse down by setting the valid/leaf mask to the subvoxel
+		//		Check to see if it is valid
+		//			Yes? 
+		//				Check to see if it is a leaf
+        //				No? Break
+		//				Yes? Scale down to the next hierarchy, push the parent to the stack
+		//		
+		//			No?
+		//				Break
 		while (dimension > 1) {
 			
 			// So we can be a little bit tricky here and increment our
@@ -159,11 +169,14 @@ public:
 				quad_position.z += (dimension / 2);
 
 				mask_index += 4;
-
+				
 				idx_stack[scale] |= idx_set_z_mask;
 				scale_stack.at(static_cast<uint64_t>(log2(OCT_DIM) - log2(dimension))).set(2);
 			}
 
+			uint64_t out1 = (head >> 16) & mask_8[mask_index];
+			uint64_t out2 = (head >> 24) & mask_8[mask_index];
+
 			// Check to see if we are on a valid oct
 			if ((head >> 16) & mask_8[mask_index]) {
 				
@@ -171,6 +184,7 @@ public:
 				if ((head >> 24) & mask_8[mask_index]) {
 
 					// If it is, then we cannot traverse further as CP's won't have been generated
+					return true;
 					break;
 				}
 
@@ -180,10 +194,14 @@ 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 current parent stack position
+				// 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 index = static_cast<int>((parent_stack[parent_stack_position] & child_pointer_mask) + count);
-				
+
+				// 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...
+				index = (head & child_pointer_mask) + count - 1;
+				head = block_stack.front()[index];
+
 				// Increment the parent stack position and put the new oct node as the parent
 				parent_stack_position++;
 				parent_stack[parent_stack_position] = block_stack.front()[index];
@@ -196,6 +214,7 @@ public:
 				// to focus on how to now take care of the end condition.
 				// Currently it adds the last parent on the second to lowest
 				// oct CP. Not sure if thats correct
+				return false;
 				break;
 			}
 		}
@@ -226,17 +245,14 @@ private:
 	const uint64_t contour_pointer_mask = 0xFFFFFF00000000;
 	const uint64_t contour_mask = 0xFF00000000000000;
 
-	
-	
-
 };
 
 
 class Map {
 public: 
 
-
-	Map(sf::Vector3i dim);
+	
+	Map(sf::Vector3i position);
 	void generate_octree();
 
 	void load_unload(sf::Vector3i world_position);
@@ -250,10 +266,12 @@ public:
 
 	char getVoxelFromOctree(sf::Vector3i position);
 
-	void moveLight(sf::Vector2f in);
+	bool getVoxel(sf::Vector3i pos);
+	Octree a;
+
 	sf::Vector3f global_light;
 
-	Octree a;
+	void test_map();
 
 protected:
 
@@ -261,7 +279,7 @@ private:
 
 	// DEBUG
 	int counter = 0;
-	std::stringstream ss;
+	std::stringstream output_stream;
 
 	// !DEBUG
 
@@ -269,7 +287,6 @@ private:
 	uint64_t generate_children(sf::Vector3i pos, int dim);
 
 
-	char getVoxel(sf::Vector3i pos);
 	char* voxel_data = new char[OCT_DIM * OCT_DIM * OCT_DIM];
 
 	//std::unordered_map<sf::Vector3i, Chunk, XYZHasher> chunk_map;

include/raycaster/Hardware_Caster.h

@@ -38,6 +38,7 @@ struct device {
 	cl_uint comp_units;
 	char extensions[1024];
 	char name[256];
+	cl_bool is_little_endian = false;
 	bool cl_gl_sharing = false;
 };
 

notes/notes.cpp

@@ -2,40 +2,9 @@
 
 /*
 
-OpenCL:
-	- Add phong lighting / fix the current implementation
-	- Switch to switch lighting models
-	- Separate out into a part of the rendering module
-
-Map:
-	- Implement the new octree structure
-		- storing the pre-octree volumetric data
-		- determining when to load volumetric data into the in-memory structure
-		- building the octree from that raw volumetric data
-		- combining with other octree nodes to allow streaming of leafs
-		- passing that data into the renderer
-			- renderer needs to then traverse the octree
-	- Terrain generation for real this time
-	- Loader of 3rd party voxel data
-
-Renderer:
-	- Determine when to switch between the cpu and gpu rendering 
-	- call to the map to make sure that the gpu/cpu has an up to date copy
-	  of the volumetric data
-
-
-	  
-	  
-	  
-	  
-	  
-	  
-	  
-	  
 Build:
-	Z:\Cpp_Libs\SFML-Visual_Studio2015RCx64
+	Z:\Cpp_Libs\SFML-2.4.2
 	Z:/Cpp_Libs/glew-2.0.0/lib/Release/x64/glew32s.lib
 	Z:/Cpp_Libs/glew-2.0.0/include
-	  
-*/
 
+*/

src/Map.cpp

@@ -1,7 +1,5 @@
 #include "Map.h"
 
-
-
 void SetBit(int position, char* c) {
 	*c |= (uint64_t)1 << position;
 }
@@ -70,33 +68,38 @@ bool IsLeaf(const uint64_t descriptor) {
 
 Map::Map(sf::Vector3i position) {
 
+	srand(time(NULL));
+
 	load_unload(position);
 
 	for (int i = 0; i < OCT_DIM * OCT_DIM * OCT_DIM; i++) {
-		if (rand() % 8 > 2)
+		if (rand() % 2 == 1)
 			voxel_data[i] = 0;
 		else
 			voxel_data[i] = 1;
 	}
+
+	voxel_data[0 + OCT_DIM * (0 + OCT_DIM * 0)] = 1;
+
 }
 
-uint64_t Map::generate_children(sf::Vector3i pos, int dim) {
+uint64_t Map::generate_children(sf::Vector3i pos, int voxel_scale) {
 
 
 	// The 8 subvoxel coords starting from the 1th direction, the direction of the origin of the 3d grid
 	// XY, Z++, XY
 	std::vector<sf::Vector3i> v = { 
 		sf::Vector3i(pos.x      , pos.y      , pos.z),
-		sf::Vector3i(pos.x + dim, pos.y      , pos.z),
-		sf::Vector3i(pos.x      , pos.y + dim, pos.z),
-		sf::Vector3i(pos.x + dim, pos.y + dim, pos.z),
-		sf::Vector3i(pos.x      , pos.y      , pos.z + dim),
-		sf::Vector3i(pos.x + dim, pos.y      , pos.z + dim),
-		sf::Vector3i(pos.x      , pos.y + dim, pos.z + dim),
-		sf::Vector3i(pos.x + dim, pos.y + dim, pos.z + dim) 
+		sf::Vector3i(pos.x + voxel_scale, pos.y      , pos.z),
+		sf::Vector3i(pos.x      , pos.y + voxel_scale, pos.z),
+		sf::Vector3i(pos.x + voxel_scale, pos.y + voxel_scale, pos.z),
+		sf::Vector3i(pos.x      , pos.y      , pos.z + voxel_scale),
+		sf::Vector3i(pos.x + voxel_scale, pos.y      , pos.z + voxel_scale),
+		sf::Vector3i(pos.x      , pos.y + voxel_scale, pos.z + voxel_scale),
+		sf::Vector3i(pos.x + voxel_scale, pos.y + voxel_scale, pos.z + voxel_scale) 
 	};
 
-	if (dim == 1) {
+	if (voxel_scale == 1) {
 
 		// Return the base 2x2 leaf node
 		uint64_t tmp = 0;
@@ -126,10 +129,11 @@ uint64_t Map::generate_children(sf::Vector3i pos, int dim) {
 		for (int i = 0; i < v.size(); i++) {
 
 			// Get the child descriptor from the i'th to 8th subvoxel
-			child = generate_children(v.at(i), dim / 2);
+			child = generate_children(v.at(i), voxel_scale / 2);
 
-			PrettyPrintUINT64(child, &ss);
-			ss << "    " << dim << "    " << counter++ << std::endl;
+			// 
+			PrettyPrintUINT64(child, &output_stream);
+			output_stream << "    " << voxel_scale << "    " << counter++ << std::endl;
 
 			if (IsLeaf(child)) {
 				if (CheckLeafSign(child))
@@ -168,8 +172,8 @@ void Map::generate_octree() {
 	uint64_t root_node = generate_children(sf::Vector3i(0, 0, 0), OCT_DIM/2);
 	uint64_t tmp = 0;
 
-	PrettyPrintUINT64(root_node, &ss);
-	ss << "    " << OCT_DIM << "    " << counter++ << std::endl;
+	PrettyPrintUINT64(root_node, &output_stream);
+	output_stream << "    " << OCT_DIM << "    " << counter++ << std::endl;
 
 	if (IsLeaf(root_node)) {
 		if (CheckLeafSign(root_node))
@@ -185,7 +189,7 @@ void Map::generate_octree() {
 
 	tmp |= a.copy_to_stack(std::vector<uint64_t>{root_node});
 
-	DumpLog(&ss, "raw_output.txt");
+	DumpLog(&output_stream, "raw_output.txt");
 
 	a.print_block(0);
 
@@ -246,7 +250,35 @@ char Map::getVoxelFromOctree(sf::Vector3i position)
 	return a.get_voxel(position);
 }
 
-char Map::getVoxel(sf::Vector3i pos){
+bool Map::getVoxel(sf::Vector3i pos){
+
+	if (voxel_data[pos.x + OCT_DIM * (pos.y + OCT_DIM * pos.z)]) {
+		return true;
+	} else {
+		return false;
+	}
+}
+
+void Map::test_map() {
+
+	for (int x = 0; x < OCT_DIM; x++) {
+		for (int y = 0; y < OCT_DIM; y++) {
+			for (int z = 0; z < OCT_DIM; z++) {
+
+				sf::Vector3i pos(x, y, z);
+
+				bool arr1 = getVoxel(pos);
+				bool arr2 = getVoxelFromOctree(pos);
+
+				if (arr1 != arr2) {
+					std::cout << "MISMATCH" << std::endl;
+				}
+
+			}
+		}
+	}
+
+
+	std::cout << "\nGOOD" << std::endl;
 
-	return voxel_data[pos.x + OCT_DIM * (pos.y + OCT_DIM * pos.z)];
 }

src/main.cpp

@@ -93,10 +93,13 @@ int main() {
 	// ni.stop_listening_for_clients();
 
 	// =============================
-	// Map _map(sf::Vector3i(0, 0, 0));
-	// _map.generate_octree();
-	// _map.a.get_voxel(sf::Vector3i(5, 5, 0));
-	// return 0;
+	Map _map(sf::Vector3i(0, 0, 0));
+	_map.generate_octree();
+	std::cout << _map.a.get_voxel(sf::Vector3i(5, 5, 0));
+	std::cout << _map.getVoxel(sf::Vector3i(5, 5, 0));
+	_map.test_map();
+	std::cin.get();
+	return 0;
 	// =============================
 
     sf::RenderWindow window(sf::VideoMode(WINDOW_X, WINDOW_Y), "SFML");

src/raycaster/Hardware_Caster.cpp

@@ -11,7 +11,6 @@ Hardware_Caster::~Hardware_Caster() {
 int Hardware_Caster::init() {
 
 	// Initialize opencl up to the point where we start assigning buffers
-
 	error = acquire_platform_and_device();
 	if(vr_assert(error, "aquire_platform_and_device"))
 		return error;
@@ -316,6 +315,7 @@ int Hardware_Caster::acquire_platform_and_device() {
 			clGetDeviceInfo(d.id, CL_DEVICE_MAX_COMPUTE_UNITS, sizeof(cl_uint), &d.comp_units, NULL);
 			clGetDeviceInfo(d.id, CL_DEVICE_EXTENSIONS, 1024, &d.extensions, NULL);
 			clGetDeviceInfo(d.id, CL_DEVICE_NAME, 256, &d.name, NULL);
+			clGetDeviceInfo(d.id, CL_DEVICE_ENDIAN_LITTLE, sizeof(cl_bool), &d.is_little_endian, NULL);
 
 			std::cout << "Device: " << q << std::endl;
 			std::cout << "Device Name : " << d.name << std::endl;
@@ -335,6 +335,7 @@ int Hardware_Caster::acquire_platform_and_device() {
 
 			std::cout << "Max clock frequency : " << d.clock_frequency << std::endl;
 			std::cout << "Max compute units   : " << d.comp_units << std::endl;
+			std::cout << "Is little endian    : " << std::boolalpha << static_cast<bool>(d.is_little_endian) << std::endl;
 
 			std::cout << "cl_khr_gl_sharing supported: ";
 			if (std::string(d.extensions).find("cl_khr_gl_sharing") == std::string::npos &&