From 28d8022265a12e5032ddb54077f90af9f1bcb4f5 Mon Sep 17 00:00:00 2001 From: Vito Caputo Date: Fri, 26 May 2017 23:46:41 -0700 Subject: ray: s/nlerp/lerp/ where normalize is unnecessary It's only necessary to normalize the direction stored vector in x_step(), the rest can simply be linearly interpolated which saves some divides. --- src/modules/ray/ray_camera.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'src/modules/ray/ray_camera.h') diff --git a/src/modules/ray/ray_camera.h b/src/modules/ray/ray_camera.h index 387f8c5..6e48839 100644 --- a/src/modules/ray/ray_camera.h +++ b/src/modules/ray/ray_camera.h @@ -67,8 +67,8 @@ static inline int ray_camera_frame_y_step(ray_camera_frame_t *frame) } frame->y_alpha += frame->y_delta; - frame->cur_w = ray_3f_nlerp(&frame->nw, &frame->sw, frame->y_alpha); - frame->cur_e = ray_3f_nlerp(&frame->ne, &frame->se, frame->y_alpha); + frame->cur_w = ray_3f_lerp(&frame->nw, &frame->sw, frame->y_alpha); + frame->cur_e = ray_3f_lerp(&frame->ne, &frame->se, frame->y_alpha); frame->ray->direction = frame->cur_w; return 1; -- cgit v1.2.3