diff options
Diffstat (limited to 'intern/cycles/util/math_intersect.h')
| -rw-r--r-- | intern/cycles/util/math_intersect.h | 37 |
1 files changed, 20 insertions, 17 deletions
diff --git a/intern/cycles/util/math_intersect.h b/intern/cycles/util/math_intersect.h index b0de0b25a45..c5b1cd51030 100644 --- a/intern/cycles/util/math_intersect.h +++ b/intern/cycles/util/math_intersect.h @@ -10,7 +10,8 @@ CCL_NAMESPACE_BEGIN ccl_device bool ray_sphere_intersect(float3 ray_P, float3 ray_D, - float ray_t, + float ray_tmin, + float ray_tmax, float3 sphere_P, float sphere_radius, ccl_private float3 *isect_P, @@ -33,7 +34,7 @@ ccl_device bool ray_sphere_intersect(float3 ray_P, return false; } const float t = tp - sqrtf(radiussq - dsq); /* pythagoras */ - if (t < ray_t) { + if (t > ray_tmin && t < ray_tmax) { *isect_t = t; *isect_P = ray_P + ray_D * t; return true; @@ -44,7 +45,8 @@ ccl_device bool ray_sphere_intersect(float3 ray_P, ccl_device bool ray_aligned_disk_intersect(float3 ray_P, float3 ray_D, - float ray_t, + float ray_tmin, + float ray_tmax, float3 disk_P, float disk_radius, ccl_private float3 *isect_P, @@ -59,7 +61,7 @@ ccl_device bool ray_aligned_disk_intersect(float3 ray_P, } /* Compute t to intersection point. */ const float t = -disk_t / div; - if (t < 0.0f || t > ray_t) { + if (!(t > ray_tmin && t < ray_tmax)) { return false; } /* Test if within radius. */ @@ -74,7 +76,8 @@ ccl_device bool ray_aligned_disk_intersect(float3 ray_P, ccl_device bool ray_disk_intersect(float3 ray_P, float3 ray_D, - float ray_t, + float ray_tmin, + float ray_tmax, float3 disk_P, float3 disk_N, float disk_radius, @@ -92,7 +95,8 @@ ccl_device bool ray_disk_intersect(float3 ray_P, } float3 P = ray_P + t * ray_D; float3 T = P - disk_P; - if (dot(T, T) < sqr(disk_radius) /*&& t > 0.f*/ && t <= ray_t) { + + if (dot(T, T) < sqr(disk_radius) && (t > ray_tmin && t < ray_tmax)) { *isect_P = ray_P + t * ray_D; *isect_t = t; return true; @@ -103,7 +107,8 @@ ccl_device bool ray_disk_intersect(float3 ray_P, ccl_device_forceinline bool ray_triangle_intersect(float3 ray_P, float3 ray_dir, - float ray_t, + float ray_tmin, + float ray_tmax, const float3 tri_a, const float3 tri_b, const float3 tri_c, @@ -149,16 +154,14 @@ ccl_device_forceinline bool ray_triangle_intersect(float3 ray_P, /* Perform depth test. */ const float T = dot3(v0, Ng); - const int sign_den = (__float_as_int(den) & 0x80000000); - const float sign_T = xor_signmask(T, sign_den); - if ((sign_T < 0.0f) || (sign_T > ray_t * xor_signmask(den, sign_den))) { + const float t = T / den; + if (!(t >= ray_tmin && t <= ray_tmax)) { return false; } - const float inv_den = 1.0f / den; - *isect_u = U * inv_den; - *isect_v = V * inv_den; - *isect_t = T * inv_den; + *isect_u = U / den; + *isect_v = V / den; + *isect_t = t; return true; #undef dot3 @@ -171,8 +174,8 @@ ccl_device_forceinline bool ray_triangle_intersect(float3 ray_P, */ ccl_device bool ray_quad_intersect(float3 ray_P, float3 ray_D, - float ray_mint, - float ray_maxt, + float ray_tmin, + float ray_tmax, float3 quad_P, float3 quad_u, float3 quad_v, @@ -185,7 +188,7 @@ ccl_device bool ray_quad_intersect(float3 ray_P, { /* Perform intersection test. */ float t = -(dot(ray_P, quad_n) - dot(quad_P, quad_n)) / dot(ray_D, quad_n); - if (t < ray_mint || t > ray_maxt) { + if (!(t > ray_tmin && t < ray_tmax)) { return false; } const float3 hit = ray_P + t * ray_D; |