12a43edc2d
git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk/SWIG@4141 626c5289-ae23-0410-ae9c-e8d60b6d4f22
44 lines
801 B
C
44 lines
801 B
C
/* File : vector.c */
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#include <stdlib.h>
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#include <stdio.h>
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#include "vector.h"
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Vector *createv(double x, double y, double z, double w) {
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Vector *n;
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n = (Vector *) malloc(sizeof(Vector));
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n->x = x;
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n->y = y;
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n->z = z;
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n->w = w;
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return n;
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}
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/* Destroy vector */
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void destroyv(Vector *v) {
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free(v);
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}
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/* Print a vector */
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void printv(Vector *v) {
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printf("x = %g, y = %g, z = %g, w = %g\n", v->x, v->y, v->z, v->w);
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}
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/* Do a transformation */
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void transform(double **m, Vector *v, Vector *r) {
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r->x = m[0][0]*v->x + m[0][1]*v->y + m[0][2]*v->z + m[0][3]*v->w;
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r->y = m[1][0]*v->x + m[1][1]*v->y + m[1][2]*v->z + m[1][3]*v->w;
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r->z = m[2][0]*v->x + m[2][1]*v->y + m[2][2]*v->z + m[2][3]*v->w;
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r->w = m[3][0]*v->x + m[3][1]*v->y + m[3][2]*v->z + m[3][3]*v->w;
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}
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