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+ | Handling transformation objects

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TheRedShip
2025-01-21 00:02:12 +01:00
parent fc9f8b9d91
commit da49d10ec5
13 changed files with 135 additions and 27 deletions
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51
shaders/trace.glsl
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@ -118,6 +118,36 @@ 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 hit;
@ -128,21 +158,28 @@ hitInfo traverseBVHs(Ray ray)
for (int i = 0; i < u_bvhNum; i++)
{
GPUBvhData bvh_data = BvhData[i];
mat3 transformMatrix = mat3(bvh_data.transform);
mat3 inverseTransformMatrix = inverse(transformMatrix);
ray.origin -= bvh_data.offset;
hitInfo temp_hit = traceBVH(ray, bvh_data);
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]);
temp_hit.t = temp_hit.t / bvh_data.scale;
if (temp_hit.t < hit.t)
{
hit.t = temp_hit.t;
hit.last_t = temp_hit.last_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 = temp_hit.position;
hit.normal = temp_hit.normal;
hit.position = inverseTransformMatrix * temp_hit.position + bvh_data.offset;
hit.normal = normalize(inverseTransformMatrix * temp_hit.normal);
}
ray.origin += bvh_data.offset;
}
return (hit);