diff options
Diffstat (limited to 'intern/cycles/util')
| -rw-r--r-- | intern/cycles/util/util_transform.h | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/intern/cycles/util/util_transform.h b/intern/cycles/util/util_transform.h index e4897ee6787..b460c4c87a2 100644 --- a/intern/cycles/util/util_transform.h +++ b/intern/cycles/util/util_transform.h @@ -61,16 +61,20 @@ __device_inline float3 transform_perspective(const Transform *t, const float3 a) __device_inline float3 transform_point(const Transform *t, const float3 a) { - float4 b = make_float4(a.x, a.y, a.z, 1.0f); - float3 c = make_float3(dot(t->x, b), dot(t->y, b), dot(t->z, b)); + float3 c = make_float3( + a.x*t->x.x + a.y*t->x.y + a.z*t->x.z + t->x.w, + a.x*t->y.x + a.y*t->y.y + a.z*t->y.z + t->y.w, + a.x*t->z.x + a.y*t->z.y + a.z*t->z.z + t->z.w); return c; } __device_inline float3 transform_direction(const Transform *t, const float3 a) { - float4 b = make_float4(a.x, a.y, a.z, 0.0f); - float3 c = make_float3(dot(t->x, b), dot(t->y, b), dot(t->z, b)); + float3 c = make_float3( + a.x*t->x.x + a.y*t->x.y + a.z*t->x.z, + a.x*t->y.x + a.y*t->y.y + a.z*t->y.z, + a.x*t->z.x + a.y*t->z.y + a.z*t->z.z); return c; } |