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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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57
shaders/debug.glsl
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@ -69,7 +69,9 @@ layout(std430, binding = 2) buffer TriangleBuffer
struct GPUBvhData
{
mat4 transform;
vec3 offset;
float scale;
int bvh_start_index;
int triangle_start_index;
@ -210,6 +212,44 @@ hitInfo traceBVH(Ray ray, GPUBvhData bvh_data, inout Stats stats)
return (hit);
}
mat3 rotateX(float angleRadians) {
float c = cos(angleRadians);
float s = sin(angleRadians);
return mat3(
1.0, 0.0, 0.0,
0.0, c, -s,
0.0, s, c
);
}
mat3 rotateY(float angleRadians) {
float c = cos(angleRadians);
float s = sin(angleRadians);
return mat3(
c, 0.0, s,
0.0, 1.0, 0.0,
-s, 0.0, c
);
}
mat3 rotateZ(float angleRadians) {
float c = cos(angleRadians);
float s = sin(angleRadians);
return mat3(
c, -s, 0.0,
s, c, 0.0,
0.0, 0.0, 1.0
);
}
mat3 createTransformMatrix(vec3 rotationAngles, float scale) {
mat3 rotMatrix = rotateZ(rotationAngles.z) *
rotateY(rotationAngles.y) *
rotateX(rotationAngles.x);
return rotMatrix * scale;
}
hitInfo traverseBVHs(Ray ray, inout Stats stats)
{
hitInfo hit;
@ -219,14 +259,25 @@ hitInfo traverseBVHs(Ray ray, inout Stats stats)
for (int i = 0; i < u_bvhNum; i++)
{
ray.origin = i == 0 ? ray.origin : ray.origin + vec3(2., 0., 0.);
hitInfo temp_hit = traceBVH(ray, BvhData[i], stats);
GPUBvhData bvh_data = BvhData[i];
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], stats);
temp_hit.t = temp_hit.t / bvh_data.scale;
if (temp_hit.t < hit.t)
{
hit.t = temp_hit.t;
hit.obj_index = temp_hit.obj_index;
hit.normal = temp_hit.normal;
hit.normal = normalize(inverseTransformMatrix * temp_hit.normal);
}
}