diff options
Diffstat (limited to 'src/transform/transform.c')
-rw-r--r-- | src/transform/transform.c | 170 |
1 files changed, 0 insertions, 170 deletions
diff --git a/src/transform/transform.c b/src/transform/transform.c deleted file mode 100644 index b0f6dc9..0000000 --- a/src/transform/transform.c +++ /dev/null @@ -1,170 +0,0 @@ -#include <stdlib.h> -#include <string.h> -#include <math.h> - -#include <kalmia.h> -#include <ezxml.h> -#include "transform.h" - - -#define TWO_PI 6.2831853071796f - - -int kai_identity(ka_matrix_t *m) -{ - memset(*m, 0, sizeof(ka_matrix_t)); - (*m)[0] = 1.0f; - (*m)[5] = 1.0f; - (*m)[10] = 1.0f; - (*m)[15] = 1.0f; - - return 0; -} - - -int kai_multiply(ka_matrix_t *dest, ka_matrix_t A, ka_matrix_t B) -{ - ka_matrix_t C; - memset(C, 0, sizeof(ka_matrix_t)); - - int i, j, k; - int a_ind, b_ind, c_ind; - for (i=0; i<4; i++) { - for (j=0; j<4; j++) { - c_ind = (4*i) + j; - for (k=0; k<4; k++) { - a_ind = (4*i) + k; - b_ind = (4*k) + j; - C[c_ind] += A[a_ind] * B[b_ind]; - } - } - } - - memcpy(*dest, C, sizeof(ka_matrix_t)); - return 0; -} - - -int kai_parse_matrix(ka_matrix_t *m, ezxml_t tag) -{ - if (strcmp("matrix", ezxml_name(tag)) != 0) - return -1; - - char *str = ezxml_txt(tag); - char *end; - int i; - for (i=0; i<16; i++) { - (*m)[i] = strtod(str, &end); - str = end; - } - - return 0; -} - - -int kai_parse_rotate(ka_matrix_t *m, ezxml_t tag) -{ - if (strcmp("rotate", ezxml_name(tag)) != 0) - return -1; - - char *str = ezxml_txt(tag); - char *end; - int i; - double rot[4]; - for (i=0; i<4; i++) { - rot[i] = strtod(str, &end); - str = end; - } - - double x, y, z, angle; - x = rot[0]; - y = rot[1]; - z = rot[2]; - angle = rot[3]; - - /* normalize length */ - double axis_len = (x*x) + (y*y) + (z*z); - axis_len = sqrt(axis_len); - x /= axis_len; - y /= axis_len; - z /= axis_len; - - /* convert angle to radians */ - angle *= TWO_PI / 360; - - /* compute rotation matrix entries */ - double co = cos(angle); - double unco = 1 - co; - double si = sin(angle); - - (*m)[0] = (x*x*unco) + co; - (*m)[1] = (x*y*unco) - (z*si); - (*m)[2] = (x*z*unco) + (y*si); - (*m)[3] = 0.0f; - (*m)[4] = (y*x*unco) + (z*si); - (*m)[5] = (y*y*unco) + co; - (*m)[6] = (y*z*unco) - (x*si); - (*m)[7] = 0.0f; - (*m)[8] = (z*x*unco) - (y*si); - (*m)[9] = (z*y*unco) + (x*si); - (*m)[10] = (z*z*unco) + co; - (*m)[11] = 0.0f; - (*m)[12] = 0.0f; - (*m)[13] = 0.0f; - (*m)[14] = 0.0f; - (*m)[15] = 1.0f; - - return 0; -} - - -int kai_parse_scale(ka_matrix_t *m, ezxml_t tag) -{ - if (strcmp("scale", ezxml_name(tag)) != 0) - return -1; - - char *str = ezxml_txt(tag); - char *end; - int i; - double scale[3]; - for (i=0; i<3; i++) { - scale[i] = strtod(str, &end); - str = end; - } - - memset(*m, 0, 16*sizeof(double)); - (*m)[0] = scale[0]; - (*m)[5] = scale[1]; - (*m)[10] = scale[2]; - (*m)[15] = 1.0f; - - return 0; -} - - -int kai_parse_translate(ka_matrix_t *m, ezxml_t tag) -{ - if (strcmp("translate", ezxml_name(tag)) != 0) - return -1; - - char *str = ezxml_txt(tag); - char *end; - int i; - double move[3]; - for (i=0; i<3; i++) { - move[i] = strtod(str, &end); - str = end; - } - - memset(*m, 0, sizeof(ka_matrix_t)); - - (*m)[0] = 1.0f; - (*m)[3] = move[0]; - (*m)[5] = 1.0f; - (*m)[7] = move[1]; - (*m)[10] = 1.0f; - (*m)[11] = move[2]; - (*m)[15] = 1.0f; - - return 0; -} |