mitchellhansen/voxel-raycaster
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

256^3 rendering at 15FPS WITHOUT THE TRAVERSAL ALGORITHM! This thing's gonna FLY!

Browse Source
This commit is contained in:
MitchellHansen
2017-10-12 00:15:56 -07:00
parent b9c1bef7bc
commit 77e283a4ce
4 changed files with 17 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
kernels/ray_caster_kernel.cl
View File

@@ -126,7 +126,7 @@ bool get_oct_vox(
parent_stack[parent_stack_position] = head;
// Set our initial dimension and the position at the corner of the oct to keep track of our position
int dimension = 128;
int dimension = OCTDIM;
int3 quad_position = zeroed_int3;
// While we are not at the required resolution
@@ -192,16 +192,17 @@ bool get_oct_vox(
// Negate it by one as it counts itself
int count = popcount((uchar)(head >> 16) & count_mask_8[mask_index]) - 1;
//bool jumping = false;
//if (far_bit_mask & descriptor_buffer[current_index])
// jumping = true;
// access the far point at which the head points too. Determine it's value, and add
// a count of the valid bits to the index
if (far_bit_mask & octree_descriptor_buffer[current_index]) {
int far_pointer_index = current_index + (head & child_pointer_mask);
current_index = octree_descriptor_buffer[far_pointer_index] + count;
}
// access the element at which head points to and then add the specified number of indices
// to get to the correct child descriptor
else {
current_index = current_index + (head & child_pointer_mask) + count;
//if (jumping == true)
// current_index = descriptor_buffer[current_index];
}
head = octree_descriptor_buffer[current_index];
// Increment the parent stack position and put the new oct node as the parent
@@ -323,7 +324,7 @@ __kernel void raycaster(
break;
}
constant int vox_dim = 128;
constant int vox_dim = OCTDIM;
// If we hit a voxel
if (voxel.x < vox_dim && voxel.y < vox_dim && voxel.z < vox_dim){

2
src/Application.cpp
View File

@@ -37,7 +37,7 @@ bool Application::init_clcaster() {
// Init the raycaster with a specified dimension and a pointer to the source
// array style data
octree = std::make_shared<Map>(128, map.get());
octree = std::make_shared<Map>(256, map.get());
raycaster->assign_octree(octree);

6
src/CLCaster.cpp
View File

@@ -706,7 +706,11 @@ bool CLCaster::compile_kernel(std::string kernel_source, bool is_path, std::stri
// Try and build the program
// "-cl-finite-math-only -cl-fast-relaxed-math -cl-unsafe-math-optimizations"
error = clBuildProgram(program, 1, &device_id, "-cl-finite-math-only -cl-fast-relaxed-math -cl-unsafe-math-optimizations", NULL, NULL);
// need a ref to the oct dimensions
//std::string oct_dimensions = std::to_string(map->getDimensions().x);
std::string build_string = "-DOCTDIM=256 -cl-finite-math-only -cl-fast-relaxed-math -cl-unsafe-math-optimizations";
error = clBuildProgram(program, 1, &device_id, build_string.c_str(), NULL, NULL);
// Check to see if it error'd out
if (cl_assert(error)) {

3
src/map/Octree.cpp
View File

@@ -246,9 +246,6 @@ std::tuple<uint64_t, uint64_t> Octree::GenerationRecursion(char* data, sf::Vecto
}
}
if (voxel_scale == 64)
std::cout << "WHoA";
// We are working bottom up so we need to subtract from the stack position
// the amount of elements we want to use. In the worst case this will be
// a far pointer for ever descriptor (size * 2)