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added tunnings for aobench

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This commit is contained in:
Evghenii
2014-02-06 10:13:18 +01:00
parent 9e1ab7c6b6
commit 9ecb4f4ac8
4 changed files with 82 additions and 15 deletions
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58
examples_ptx/aobench/ao.cu
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@@ -189,7 +189,8 @@ ray_plane_intersect(Isect &isect,const Ray &ray, const Plane &plane) {
float d = -dot(plane.p, plane.n);
float v = dot(ray.dir, plane.n);
if (abs(v) < 1.0e-17)
#if 0
if (abs(v) < 1.0f-17)
return;
else {
float t = -(dot(ray.org, plane.n) + d) / v;
@@ -201,6 +202,17 @@ ray_plane_intersect(Isect &isect,const Ray &ray, const Plane &plane) {
isect.n = plane.n;
}
}
#else
if (abs(v) <= 1.0e-17)
return;
float t = -(dot(ray.org, plane.n) + d) / v;
if ((t > 0.0) && (t < isect.t)) {
isect.t = t;
isect.hit = 1;
isect.p = ray.org + ray.dir * t;
isect.n = plane.n;
}
#endif
}
@@ -213,6 +225,7 @@ ray_sphere_intersect(Isect &isect,const Ray &ray, const Sphere &sphere) {
float C = dot(rs, rs) - sphere.radius * sphere.radius;
float D = B * B - C;
#if 0
if (D > 0.) {
float t = -B - sqrt(D);
@@ -224,6 +237,21 @@ ray_sphere_intersect(Isect &isect,const Ray &ray, const Sphere &sphere) {
vnormalize(isect.n);
}
}
#else
if (D <= 0.0f)
return;
float t = -B - sqrt(D);
if ((t > 0.0) && (t < isect.t)) {
isect.t = t;
isect.hit = 1;
isect.p = ray.org + ray.dir * t;
isect.n = isect.p - sphere.center;
vnormalize(isect.n);
}
#endif
}
@@ -231,16 +259,16 @@ __device__
static inline void
orthoBasis(vec basis[3], vec n) {
basis[2] = n;
basis[1].x = 0.0; basis[1].y = 0.0; basis[1].z = 0.0;
basis[1].x = 0.0f; basis[1].y = 0.0f; basis[1].z = 0.0f;
if ((n.x < 0.6) && (n.x > -0.6)) {
basis[1].x = 1.0;
} else if ((n.y < 0.6) && (n.y > -0.6)) {
basis[1].y = 1.0;
} else if ((n.z < 0.6) && (n.z > -0.6)) {
basis[1].z = 1.0;
if ((n.x < 0.6f) && (n.x > -0.6f)) {
basis[1].x = 1.0f;
} else if ((n.y < 0.6f) && (n.y > -0.6f)) {
basis[1].y = 1.0f;
} else if ((n.z < 0.6f) && (n.z > -0.6f)) {
basis[1].z = 1.0f;
} else {
basis[1].x = 1.0;
basis[1].x = 1.0f;
}
basis[0] = vcross(basis[1], basis[2]);
@@ -258,7 +286,7 @@ ambient_occlusion(Isect &isect, const Plane &plane, const Sphere spheres[3],
float eps = 0.0001f;
vec p; //, n;
vec basis[3];
float occlusion = 0.0;
float occlusion = 0.0f;
p = isect.p + isect.n * eps;
@@ -275,7 +303,7 @@ ambient_occlusion(Isect &isect, const Plane &plane, const Sphere spheres[3],
float phi = 2.0f * M_PI * frandom(&rngstate);
float x = cos(phi) * theta;
float y = sin(phi) * theta;
float z = sqrt(1.0 - theta * theta);
float z = sqrtf(1.0f - theta * theta);
// local . global
float rx = x * basis[0].x + y * basis[1].x + z * basis[2].x;
@@ -287,14 +315,14 @@ ambient_occlusion(Isect &isect, const Plane &plane, const Sphere spheres[3],
ray.dir.y = ry;
ray.dir.z = rz;
occIsect.t = 1.0e+17;
occIsect.t = 1.0f+17;
occIsect.hit = 0;
for ( int snum = 0; snum < 3; ++snum)
ray_sphere_intersect(occIsect, ray, spheres[snum]);
ray_plane_intersect (occIsect, ray, plane);
if (occIsect.hit) occlusion += 1.0;
if (occIsect.hit) occlusion += 1.0f;
}
}
@@ -360,8 +388,8 @@ static inline void ao_tiles(
// Note use of 'coherent' if statement; the set of rays we
// trace will often all hit or all miss the scene
if (isect.hit) {
ret = ambient_occlusion(isect, plane, spheres, rngstate);
if (any(isect.hit)) {
ret = isect.hit*ambient_occlusion(isect, plane, spheres, rngstate);
ret *= invSamples * invSamples;
res += ret;
}