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~ | TopLevelBVH

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RedShip
2025-01-22 19:33:18 +01:00
parent 594903029f
commit cd65cff03f
10 changed files with 305 additions and 115 deletions
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139
shaders/trace.glsl
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@ -99,8 +99,8 @@ hitInfo traceBVH(Ray ray, GPUBvhData bvh_data)
left_hit.t = 1e30;
right_hit.t = 1e30;
bool left_bool = intersectRayBVH(ray, left_node, left_hit);
bool right_bool = intersectRayBVH(ray, right_node, right_hit);
bool left_bool = intersectRayBVH(ray, left_node.min, left_node.max, left_hit);
bool right_bool = intersectRayBVH(ray, right_node.min, left_node.max, right_hit);
if (left_hit.t > right_hit.t)
{
@ -118,70 +118,97 @@ hitInfo traceBVH(Ray ray, GPUBvhData bvh_data)
return (hit);
}
// hitInfo traverseBVHs(Ray ray)
// {
// hitInfo hit;
// hit.t = 1e30;
// hit.obj_index = -1;
// for (int i = 0; i < u_bvhNum; i++)
// {
// GPUBvhData bvh_data = BvhData[i];
// ray.origin -= bvh_data.offset;
// hitInfo temp_hit = traceBVH(ray, bvh_data);
// if (temp_hit.t < hit.t)
// {
// hit.t = temp_hit.t;
// hit.last_t = temp_hit.last_t;
// hit.obj_index = temp_hit.obj_index;
// hit.mat_index = temp_hit.mat_index;
// hit.position = temp_hit.position;
// hit.normal = temp_hit.normal;
// }
// ray.origin += bvh_data.offset;
// }
// return (hit);
// }
hitInfo traverseBVHs(Ray ray)
hitInfo traverseBVHs(Ray ray, GPUBvhData bvh_data)
{
hitInfo hit;
hit.t = 1e30;
hit.obj_index = -1;
for (int i = 0; i < u_bvhNum; i++)
{
GPUBvhData bvh_data = BvhData[i];
mat3 transformMatrix = mat3(bvh_data.transform);
mat3 inverseTransformMatrix = inverse(transformMatrix);
mat3 transformMatrix = mat3(bvh_data.transform);
mat3 inverseTransformMatrix = inverse(transformMatrix);
Ray transformedRay;
transformedRay.direction = normalize(transformMatrix * ray.direction);
transformedRay.origin = transformMatrix * (ray.origin - bvh_data.offset);
transformedRay.inv_direction = (1. / transformedRay.direction);
hitInfo temp_hit = traceBVH(transformedRay, BvhData[i]);
Ray transformedRay;
transformedRay.direction = normalize(transformMatrix * ray.direction);
transformedRay.origin = transformMatrix * (ray.origin - bvh_data.offset);
transformedRay.inv_direction = (1. / transformedRay.direction);
hit = traceBVH(transformedRay, BvhData[i]);
temp_hit.t = temp_hit.t / bvh_data.scale;
if (hit.obj_index == -1)
return (hit);
if (temp_hit.t < hit.t)
hit.t = hit.t / bvh_data.scale;
hit.last_t = hit.last_t / bvh_data.scale;
hit.obj_index = hit.obj_index;
hit.mat_index = hit.mat_index;
hit.position = inverseTransformMatrix * hit.position + bvh_data.offset;
hit.normal = normalize(inverseTransformMatrix * hit.normal);
return (hit);
}
hitInfo traceTopBVH(Ray ray)
{
hitInfo hit;
hitInfo hit_bvh;
hit.t = 1e30;
hit.obj_index = -1;
int stack[32];
int stack_ptr = 0;
stack[0] = 0;
while (stack_ptr >= 0)
{
int current_index = stack[stack_ptr--];
GPUTopBvh node = TopBvh[current_index];
if (node.is_leaf != 0)
{
hit.t = temp_hit.t;
hit.last_t = temp_hit.last_t / bvh_data.scale;
hit.obj_index = temp_hit.obj_index;
hit.mat_index = temp_hit.mat_index;
hit.position = inverseTransformMatrix * temp_hit.position + bvh_data.offset;
hit.normal = normalize(inverseTransformMatrix * temp_hit.normal);
for (int i = 0; i < node.bvh_count; i++)
{
GPUBvhData bvh_data = bvh_data[node.first_bvh + i];
hitInfo temp_hit = traverseBVHs(ray, bvh_data);
if (temp_hit.obj_index != -1 && temp_hit.t < hit.t)
{
hit.t = temp_hit.t;
hit.last_t = temp_hit.last_t;
hit.obj_index = bvh_data.triangle_start_index + node.first_primitive + i;
hit.mat_index = obj.mat_index;
hit.position = temp_hit.position;
hit.normal = temp_hit.normal;
}
}
}
}
else
{
GPUTopBvh left_node = TopBvh[node.left_index];
GPUTopBvh right_node = TopBvh[node.right_index];
hitInfo left_hit;
hitInfo right_hit;
left_hit.t = 1e30;
right_hit.t = 1e30;
bool left_bool = intersectRayBVH(ray, left_node.min, left_node.max, left_hit);
bool right_bool = intersectRayBVH(ray, right_node.min, left_mode.max, right_hit);
if (left_hit.t > right_hit.t)
{
if (left_hit.t < hit.t && left_bool) stack[++stack_ptr] = node.left_index;
if (right_hit.t < hit.t && right_bool) stack[++stack_ptr] = node.right_index;
}
else
{
if (right_hit.t < hit.t && right_bool) stack[++stack_ptr] = node.right_index;
if (left_hit.t < hit.t && left_bool) stack[++stack_ptr] = node.left_index;
}
}
}
return (hit);
}
@ -193,7 +220,7 @@ hitInfo traceRay(Ray ray)
for (int i = 0; i < 10; i++) // portal ray
{
hitBVH = traverseBVHs(ray);
hitBVH = traceTopBVH(ray);
hitScene = traceScene(ray);
hit = hitBVH.t < hitScene.t ? hitBVH : hitScene;