/*
 * lib.h - vector library definitions
 *
 * Version:  2.2 (11/17/87)
 * Author:  Eric Haines, 3D/Eye, Inc.
 *
 * Modified: 1 October 1992
 *           Alexander R. Enzmann
 */

/* Change this to "PARAMS(x) ()" if your compiler can't handle function 
   prototyping */
#ifndef PARAMS
#define PARAMS(x) x
#endif

#define OUTPUT_VIDEO     0
#define OUTPUT_NFF       1
#define OUTPUT_POVRAY    2
#define OUTPUT_POLYRAY   3
#define OUTPUT_VIVID     4
#define OUTPUT_QRT       5
#define OUTPUT_RAYSHADE  6
#define OUTPUT_POVRAY_15 7

#define X_AXIS  0
#define Y_AXIS  1
#define Z_AXIS  2

/* Output library definitions */
#define OUTPUT_CURVES           0       /* true curve output */
#define OUTPUT_PATCHES          1       /* polygonal patches output */

#define OUTPUT_RESOLUTION       4       /* default amount of polygonalization */

/* Basic math functions */
void lib_zero_matrix PARAMS((MATRIX mx));
void lib_create_identity_matrix PARAMS((MATRIX mx));
void lib_create_translate_matrix PARAMS((MATRIX mx, COORD4 *vec));
void lib_create_scale_matrix PARAMS((MATRIX mx, COORD4 *vec));
void lib_create_rotate_matrix PARAMS((MATRIX mx, int axis, double angle));
void lib_create_axis_rotate_matrix PARAMS((MATRIX mx, COORD4 *rvec,
					   double angle));
void lib_create_canonical_matrix PARAMS((MATRIX trans, MATRIX itrans,
					 COORD4 *origin, COORD4 *up));
void lib_create_view_transform PARAMS((COORD4 *from, COORD4 *at, COORD4 *up,
				       MATRIX T));
void lib_transform_coord PARAMS((COORD4 *vres, COORD4 *vec, MATRIX mx));
void lib_matrix_multiply PARAMS((MATRIX mxres, MATRIX mx1, MATRIX mx2));
void lib_rotate_cube_face PARAMS((COORD4 *vec, int major_axis, int mod_face));
double lib_normalize_coord3 PARAMS((COORD4 *cvec));
double lib_gauss_rand PARAMS((long iseed));

/* Library setup for IO functions */
void lib_set_output_file PARAMS((FILE *new_outfile));
void lib_set_default_texture PARAMS((char *default_texture));
void lib_set_raytracer PARAMS((int default_tracer));
void lib_set_polygonalization PARAMS((int u_steps, int v_steps));

/* Scene/object generation functions */
void lib_output_viewpoint PARAMS((COORD4 *from, COORD4 *at, COORD4 *up,
				  double fov_angle, double aspect_ratio,
				  double hither, int resx, int resy));
void lib_output_light PARAMS((COORD4 *center_pt));
void lib_output_background_color PARAMS((COORD4 *color));
char *lib_output_color PARAMS((COORD4 *color, double ka, double kd, double ks,
		               double shine, double ang,
			       double t, double i_of_r));
void lib_output_cylcone PARAMS((COORD4 *base_pt, COORD4 *apex_pt,
				int curve_format));
void lib_output_sphere PARAMS((COORD4 *center_pt, int curve_format));
void lib_output_torus PARAMS((COORD4 *center, COORD4 *normal,
			      double iradius, double oradius,
			      int curve_format));
void lib_output_box PARAMS((COORD4 *point1, COORD4 *point2));
void lib_output_polygon PARAMS((int tot_vert, COORD4 *vert));
void lib_output_polypatch PARAMS((int tot_vert, COORD4 *vert, COORD4 *norm));
void lib_output_sq_sphere PARAMS((COORD4 *center_pt, double a1, double a2,
				  double a3, double n, double e));