From ba99860760eda6ec221b15190547736407723f84 Mon Sep 17 00:00:00 2001 From: Julian T Date: Thu, 7 May 2020 09:46:56 +0200 Subject: Global illumination --- ctranslate.c | 20 +++++++++++++++++--- 1 file changed, 17 insertions(+), 3 deletions(-) (limited to 'ctranslate.c') diff --git a/ctranslate.c b/ctranslate.c index f7dfe64..8d03d39 100644 --- a/ctranslate.c +++ b/ctranslate.c @@ -1,9 +1,11 @@ #include "ctranslate.h" +#include "vector.h" #include // TODO remove dublicate pi definitions #define PI 3.14159265359 +#define DEBUG 0 void csystem_init(csystem_t *cs, vector_t *up) { @@ -11,23 +13,35 @@ void csystem_init(csystem_t *cs, vector_t *up) // Create new coordinate system where N is up. To do this we need two more vectors for the other axises. // Create the 2. by setting x or y to 0 - if (up->x > up->y) { + if (fabs(up->x) > fabs(up->y)) { vector_set(&cs->ax, up->z, 0, -up->x); } else { vector_set(&cs->ax, 0, -up->z, up->y); } // Normalice - vector_scale_inv(&cs->ax, &cs->ax, vector_len(&cs->ax)); + vector_norm(&cs->ax); + // Create the 3. axis by taking the cross of the other vector_cross(&cs->az, up, &cs->ax); +#if DEBUG == 1 + printf("up "); vector_print(up); + printf("ax "); vector_print(&cs->ax); + printf("az "); vector_print(&cs->az); +#endif } void csystem_calc_real(csystem_t *cs, vector_t *inside, vector_t *real) { - vector_set(real, inside->x * cs->ax.x + inside->y * cs->up->x + inside->z * cs->az.x, + vector_t tmp; + vector_set(&tmp, inside->x * cs->ax.x + inside->y * cs->up->x + inside->z * cs->az.x, inside->x * cs->ax.y + inside->y * cs->up->y + inside->z * cs->az.y, inside->x * cs->ax.z + inside->y * cs->up->z + inside->z * cs->az.z); + + vector_copy(real, &tmp); +#if DEBUG == 1 + printf("Haha "); vector_print(real); +#endif } void csystem_hemisphere_random(csystem_t *cs, COORD_T r1, COORD_T r2, vector_t *out) -- cgit v1.2.3