From b5bc962e834992eeba2abdd10f6e37ee2ba20295 Mon Sep 17 00:00:00 2001 From: Vito Caputo Date: Mon, 19 Mar 2018 21:39:09 -0700 Subject: 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. --- src/modules/ray/ray_camera.c | 70 -------------------------------------------- 1 file changed, 70 deletions(-) delete mode 100644 src/modules/ray/ray_camera.c (limited to 'src/modules/ray/ray_camera.c') 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); -} -- cgit v1.2.3