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root/radiance/ray/src/hd/sm_geom.h
Revision: 3.13
Committed: Mon Jul 14 22:24:00 2003 UTC (20 years, 8 months ago) by schorsch
Content type: text/plain
Branch: MAIN
CVS Tags: rad3R6P1, rad3R6
Changes since 3.12: +11 -1 lines
Log Message:
Instrumented headers against multiple inclusion and for use from C++.
Moved includes in headers out of "C" scope.

File Contents

# Content
1 /* RCSid: $Id: sm_geom.h,v 3.12 2003/02/22 02:07:25 greg Exp $ */
2 /*
3 * sm_geom.h
4 */
5
6 /* Assumes included after standard.h */
7 #ifndef _RAD_SM_GEOM_H_
8 #define _RAD_SM_GEOM_H_
9
10 #include <values.h>
11
12 #ifdef __cplusplus
13 extern "C" {
14 #endif
15
16 #ifdef SMLFLT
17 #define EQUALITY_EPS 1e-6
18 #else
19 #define EQUALITY_EPS 1e-10
20 #endif
21
22 #define F_TINY 1e-10
23 #define FZERO(x) ((x) < F_TINY && (x) > -F_TINY)
24 #define FEQUAL(a,b) FZERO((a) - (b))
25
26 #define ZERO(x) ((x) < FTINY && (x) > -FTINY)
27 #define EQUAL(a,b) ZERO((a) - (b))
28
29 #ifndef TRUE
30 #define TRUE 1
31 #define FALSE 0
32 #endif
33
34 typedef struct _FPEQ {
35 FVECT n;
36 double d;
37 char x,y,z;
38 }FPEQ;
39
40 #define FP_N(f) ((f).n)
41 #define FP_D(f) ((f).d)
42 #define FP_X(f) ((f).x)
43 #define FP_Y(f) ((f).y)
44 #define FP_Z(f) ((f).z)
45
46 typedef long BCOORD;
47 typedef long BDIR;
48
49 #define BITS_BCOORD (BITS(long)-2)
50 #define SHIFT_MAXBCOORD (BITS_BCOORD-1)
51 #define MAXBCOORD ((1L << BITS_BCOORD)-1)
52 #define MAXBCOORD2 (MAXBCOORD>>1)
53 #define MAXBCOORD4 (MAXBCOORD2>>1)
54
55 #define M_2_3_PI PI*2/3
56
57 #ifndef INVALID
58 #define INVALID -1
59 #endif
60 #define IADDV3(v,a) ((v)[0] += (a)[0],(v)[1] += (a)[1],(v)[2] += (a)[2])
61 #define ISUBV3(v,a) ((v)[0] -= (a)[0],(v)[1] -= (a)[1],(v)[2] -= (a)[2])
62 #define ISCALEV3(v,a) ((v)[0] *= (a),(v)[1] *= (a),(v)[2] *= (a))
63 #define IDIVV3(v,a) ((v)[0] /= (a),(v)[1] /= (a),(v)[2] /= (a))
64
65
66 #define ADDV3(v,a,b) ((v)[0] = (a)[0]+(b)[0],(v)[1] = (a)[1]+(b)[1],\
67 (v)[2] = (a)[2]+(b)[2])
68 #define SUBV3(v,a,b) ((v)[0] = (a)[0]-(b)[0],(v)[1] = (a)[1]-(b)[1],\
69 (v)[2] = (a)[2]-(b)[2])
70 #define SUMV3(v,a,b,s) ((v)[0] = (a)[0]+(s)*(b)[0],(v)[1]=(a)[1]+(s)*(b)[1],\
71 (v)[2] = (a)[2]+(s)*(b)[2])
72 #define SCALEV3(v,a,s) ((v)[0]=(a)[0]*(s),(v)[1]=(a)[1]*(s),(v)[2]=(a)[2]*(s))
73 #define ZERO_VEC3(v) (ZERO(v[0]) && ZERO(v[1]) && ZERO(v[2]) )
74 #define EQUAL_VEC3(a,b) (FEQUAL(a[0],b[0])&&FEQUAL(a[1],b[1])&&FEQUAL(a[2],b[2]))
75 #define OPP_EQUAL_VEC3(a,b) (EQUAL(a[0],-b[0])&&EQUAL(a[1],-b[1])&&EQUAL(a[2],-b[2]))
76 #define FZERO_VEC3(v) (FZERO(v[0]) && FZERO(v[1]) && FZERO(v[2]) )
77 #define FEQUAL_VEC3(a,b) (FEQUAL(a[0],b[0])&&FEQUAL(a[1],b[1])&&FEQUAL(a[2],b[2]))
78 #define NEGATE_VEC3(v) ((v)[0] *= -1.0,(v)[1] *= -1.0,(v)[2] *= -1.0)
79 #define COPY_VEC2(v1,v2) ((v1)[0]=(v2)[0],(v1)[1]=(v2)[1])
80 #define DIST(a,b) (sqrt(((a)[0]-(b)[0])*((a)[0]-(b)[0]) + \
81 ((a)[1]-(b)[1])*((a)[1]-(b)[1]) + \
82 ((a)[2]-(b)[2])*((a)[2]-(b)[2])))
83 #define DIST_SQ(a,b) (((a)[0]-(b)[0])*((a)[0]-(b)[0]) + \
84 ((a)[1]-(b)[1])*((a)[1]-(b)[1]) + \
85 ((a)[2]-(b)[2])*((a)[2]-(b)[2]))
86
87 #define SIGN(x) ((x<0)?-1:1)
88 #define CROSS_VEC2(v1,v2) (((v1)[0]*(v2)[1]) - ((v1)[1]*(v2)[0]))
89 #define DOT_VEC2(v1,v2) ((v1)[0]*(v2)[0] + (v1)[1]*(v2)[1])
90
91 #define EDGE_MIDPOINT(a,v1,v2) ((a)[0]=((v1)[0]+(v2)[0])*0.5, \
92 (a)[1]=((v1)[1]+(v2)[1])*0.5,(a)[2] = ((v1)[2]+(v2)[2])*0.5)
93
94 #define MIN_VEC3(v) ((v)[0]<(v)[1]?((v)[0]<(v)[2]?(v)[0]:v[2]): \
95 (v)[1]<(v)[2]?(v)[1]:(v)[2])
96 #define MAX3(a,b,c) (((b)>(a))?((b) > (c))?(b):(c):((a)>(c))?(a):(c))
97 #define MIN3(a,b,c) (((b)<(a))?((b) < (c))?(b):(c):((a)<(c))?(a):(c))
98
99 #define MAX(a,b) (((b)>(a))?(b):(a))
100 #define MIN(a,b) (((b)<(a))?(b):(a))
101
102 #define SUM_3VEC3(r,a,b,c) ((r)[0]=(a)[0]+(b)[0]+(c)[0], \
103 (r)[1]=(a)[1]+(b)[1]+(c)[1],(r)[2]=(a)[2]+(b)[2]+(c)[2])
104
105 #define NTH_BIT(n,i) ((n) & (1<<(i)))
106 #define SET_NTH_BIT(n,i) ((n) |= (1<<(i)))
107
108 #define PT_ON_PLANE(p,peq) (DOT(FP_N(peq),p)+FP_D(peq))
109
110 /* FUNCTIONS:
111 int point_in_cone(FVECT p,a,b,c)
112 void triangle_centroid(FVECT v0,v1,v2,c)
113 double tri_normal(FVECT v0,v1,v2,n,int norm)
114 void tri_plane_equation(FVECT v0,v1,v2,FPEQ *peqptr,int norm)
115 int intersect_ray_plane(FVECT orig,dir,FPEQ peq,double *pd,FVECT r)
116 double point_on_sphere(FVECT ps,p,c)
117 int point_in_stri(FVECT v0,v1,v2,p)
118 int ray_intersect_tri(FVECT orig,dir,v0,v1,v2,pt)
119 void calculate_view_frustum(FVECT vp,hv,vv,double horiz,vert,near,far,
120 FVECT fnear[4],ffar[4])
121 void bary2d(double x1,y1,x2,y2,x3,y3,px,py,coord)
122 */
123 double tri_normal();
124 double point_on_sphere();
125
126
127 #ifdef __cplusplus
128 }
129 #endif
130 #endif /* _RAD_SM_GEOM_H_ */
131