ray: libize raytracer core, introduces src/libs

This is the first step of breaking out all the core rendering stuffs
into reusable libraries and making modules purely compositional,
consumers of various included rendering/effects libraries.

Expect multiple modules leveraging libray for a variety of scenes and
such.  Also expect compositions mixing the various libraries for more
interesting visuals.

1 files changed, 0 insertions, 70 deletions

diff --git a/src/modules/ray/ray_camera.c b/src/modules/ray/ray_camera.c
deleted file mode 100644
index b942cf3..0000000
--- a/src/modules/ray/ray_camera.c
+++ /dev/null
@@ -1,70 +0,0 @@
-#include "fb.h"
-
-#include "ray_camera.h"
-#include "ray_euler.h"
-
-
-/* Produce a vector from the provided orientation vectors and proportions. */
-static ray_3f_t project_corner(ray_3f_t *forward, ray_3f_t *left, ray_3f_t *up, float focal_length, float horiz, float vert)
-{
-	ray_3f_t	tmp;
-	ray_3f_t	corner;
-
-	corner = ray_3f_mult_scalar(forward, focal_length);
-	tmp = ray_3f_mult_scalar(left, horiz);
-	corner = ray_3f_add(&corner, &tmp);
-	tmp = ray_3f_mult_scalar(up, vert);
-	corner = ray_3f_add(&corner, &tmp);
-
-	return ray_3f_normalize(&corner);
-}
-
-
-/* Produce vectors for the corners of the entire camera frame, used for interpolation. */
-static void project_corners(const ray_camera_t *camera, ray_camera_frame_t *frame)
-{
-	ray_3f_t	forward, left, up, right, down;
-	float		half_horiz = (float)camera->width * 0.5f;
-	float		half_vert = (float)camera->height * 0.5f;
-
-	ray_euler_basis(&camera->orientation, &forward, &up, &left);
-	right = ray_3f_negate(&left);
-	down = ray_3f_negate(&up);
-
-	frame->nw = project_corner(&forward, &left, &up, camera->focal_length, half_horiz, half_vert);
-	frame->ne = project_corner(&forward, &right, &up, camera->focal_length, half_horiz, half_vert);
-	frame->se = project_corner(&forward, &right, &down, camera->focal_length, half_horiz, half_vert);
-	frame->sw = project_corner(&forward, &left, &down, camera->focal_length, half_horiz, half_vert);
-}
-
-
-/* Prepare a frame of camera projection, initializing res_frame. */
-void ray_camera_frame_prepare(const ray_camera_t *camera, ray_camera_frame_t *res_frame)
-{
-	res_frame->camera = camera;
-
-	project_corners(camera, res_frame);
-
-	res_frame->x_delta = 1.0f / (float)camera->width;
-	res_frame->y_delta = 1.0f / (float)camera->height;
-}
-
-
-/* Begin a frame's fragment, initializing frame and ray. */
-void ray_camera_fragment_begin(ray_camera_frame_t *frame, fb_fragment_t *fb_fragment, ray_ray_t *res_ray, ray_camera_fragment_t *res_fragment)
-{
-	res_fragment->frame = frame;
-	res_fragment->fb_fragment = fb_fragment;
-	res_fragment->ray = res_ray;
-
-	res_fragment->x = res_fragment->y = 0;
-
-	res_fragment->x_alpha = frame->x_delta * (float)fb_fragment->x;
-	res_fragment->y_alpha = frame->y_delta * (float)fb_fragment->y;
-
-	res_fragment->cur_w = ray_3f_lerp(&frame->nw, &frame->sw, res_fragment->y_alpha);
-	res_fragment->cur_e = ray_3f_lerp(&frame->ne, &frame->se, res_fragment->y_alpha);
-
-	res_ray->origin = frame->camera->position;
-	res_ray->direction = ray_3f_nlerp(&res_fragment->cur_w, &res_fragment->cur_e, res_fragment->x_alpha);
-}