diff options
Diffstat (limited to 'modules/ray/ray_camera.h')
-rw-r--r-- | modules/ray/ray_camera.h | 77 |
1 files changed, 0 insertions, 77 deletions
diff --git a/modules/ray/ray_camera.h b/modules/ray/ray_camera.h deleted file mode 100644 index 387f8c5..0000000 --- a/modules/ray/ray_camera.h +++ /dev/null @@ -1,77 +0,0 @@ -#ifndef _RAY_CAMERA_H -#define _RAY_CAMERA_H - -#include <math.h> - -#include "fb.h" - -#include "ray_3f.h" -#include "ray_euler.h" -#include "ray_ray.h" - - -typedef struct ray_camera_t { - ray_3f_t position; /* position of camera, the origin of all its rays */ - ray_euler_t orientation; /* orientation of the camera */ - float focal_length; /* controls the field of view */ - unsigned width; /* width of camera viewport in pixels */ - unsigned height; /* height of camera viewport in pixels */ -} ray_camera_t; - - -typedef struct ray_camera_frame_t { - ray_camera_t *camera; /* the camera supplied to frame_begin() */ - fb_fragment_t *fragment; /* the fragment supplied to frame_begin() */ - ray_ray_t *ray; /* the ray supplied to frame_begin(), which gets updated as we step through the frame. */ - - ray_3f_t nw, ne, sw, se; /* directions pointing through the corners of the frame fragment */ - ray_3f_t cur_w, cur_e; /* current row's west and east ends */ - float x_alpha, y_alpha; /* interpolation position along the x and y axis */ - float x_delta, y_delta; /* interpolation step delta along the x and y axis */ - unsigned x, y; /* integral position within frame fragment */ -} ray_camera_frame_t; - - -void ray_camera_frame_begin(ray_camera_t *camera, fb_fragment_t *fragment, ray_ray_t *ray, ray_camera_frame_t *frame); - - -/* Step the ray through the frame on the x axis, returns 1 when rays remain on this axis, 0 at the end. */ -/* When 1 is returned, frame->ray is left pointing through the new coordinate. */ -static inline int ray_camera_frame_x_step(ray_camera_frame_t *frame) -{ - frame->x++; - - if (frame->x >= frame->fragment->width) { - frame->x = 0; - frame->x_alpha = frame->x_delta * (float)frame->fragment->x; - return 0; - } - - frame->x_alpha += frame->x_delta; - frame->ray->direction = ray_3f_nlerp(&frame->cur_w, &frame->cur_e, frame->x_alpha); - - return 1; -} - - -/* Step the ray through the frame on the y axis, returns 1 when rays remain on this axis, 0 at the end. */ -/* When 1 is returned, frame->ray is left pointing through the new coordinate. */ -static inline int ray_camera_frame_y_step(ray_camera_frame_t *frame) -{ - frame->y++; - - if (frame->y >= frame->fragment->height) { - frame->y = 0; - frame->y_alpha = frame->y_delta * (float)frame->fragment->y; - return 0; - } - - 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->ray->direction = frame->cur_w; - - return 1; -} - -#endif |