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root/radiance/ray/src/hd/sm_geom.h
Revision: 3.12
Committed: Sat Feb 22 02:07:25 2003 UTC (21 years, 2 months ago) by greg
Content type: text/plain
Branch: MAIN
CVS Tags: rad3R5
Changes since 3.11: +23 -48 lines
Log Message: 
Changes and check-in for 3.5 release
Includes new source files and modifications not recorded for many years
See ray/doc/notes/ReleaseNotes for notes between 3.1 and 3.5 release

File Contents

# User Rev Content
1 greg 3.12 /* RCSid: $Id$ */
2 gwlarson 3.1 /*
3     * sm_geom.h
4     */
5    
6     /* Assumes included after standard.h */
7    
8 gwlarson 3.4 #include <values.h>
9    
10 greg 3.12 #ifdef SMLFLT
11     #define EQUALITY_EPS 1e-6
12     #else
13     #define EQUALITY_EPS 1e-10
14     #endif
15    
16 gwlarson 3.11 #define F_TINY 1e-10
17 gwlarson 3.6 #define FZERO(x) ((x) < F_TINY && (x) > -F_TINY)
18     #define FEQUAL(a,b) FZERO((a) - (b))
19    
20 gwlarson 3.1 #define ZERO(x) ((x) < FTINY && (x) > -FTINY)
21     #define EQUAL(a,b) ZERO((a) - (b))
22    
23     #ifndef TRUE
24     #define TRUE 1
25     #define FALSE 0
26     #endif
27 gwlarson 3.4
28 gwlarson 3.5 typedef struct _FPEQ {
29     FVECT n;
30     double d;
31     char x,y,z;
32     }FPEQ;
33    
34     #define FP_N(f) ((f).n)
35     #define FP_D(f) ((f).d)
36     #define FP_X(f) ((f).x)
37     #define FP_Y(f) ((f).y)
38     #define FP_Z(f) ((f).z)
39    
40 gwlarson 3.4 typedef long BCOORD;
41     typedef long BDIR;
42 gwlarson 3.7
43     #define BITS_BCOORD (BITS(long)-2)
44     #define SHIFT_MAXBCOORD (BITS_BCOORD-1)
45     #define MAXBCOORD ((1L << BITS_BCOORD)-1)
46 gwlarson 3.4 #define MAXBCOORD2 (MAXBCOORD>>1)
47 gwlarson 3.7 #define MAXBCOORD4 (MAXBCOORD2>>1)
48 gwlarson 3.1
49     #define M_2_3_PI PI*2/3
50    
51 gwlarson 3.5 #ifndef INVALID
52 gwlarson 3.3 #define INVALID -1
53 gwlarson 3.5 #endif
54 gwlarson 3.10 #define IADDV3(v,a) ((v)[0] += (a)[0],(v)[1] += (a)[1],(v)[2] += (a)[2])
55     #define ISUBV3(v,a) ((v)[0] -= (a)[0],(v)[1] -= (a)[1],(v)[2] -= (a)[2])
56     #define ISCALEV3(v,a) ((v)[0] *= (a),(v)[1] *= (a),(v)[2] *= (a))
57     #define IDIVV3(v,a) ((v)[0] /= (a),(v)[1] /= (a),(v)[2] /= (a))
58    
59    
60     #define ADDV3(v,a,b) ((v)[0] = (a)[0]+(b)[0],(v)[1] = (a)[1]+(b)[1],\
61     (v)[2] = (a)[2]+(b)[2])
62     #define SUBV3(v,a,b) ((v)[0] = (a)[0]-(b)[0],(v)[1] = (a)[1]-(b)[1],\
63     (v)[2] = (a)[2]-(b)[2])
64     #define SUMV3(v,a,b,s) ((v)[0] = (a)[0]+(s)*(b)[0],(v)[1]=(a)[1]+(s)*(b)[1],\
65     (v)[2] = (a)[2]+(s)*(b)[2])
66     #define SCALEV3(v,a,s) ((v)[0]=(a)[0]*(s),(v)[1]=(a)[1]*(s),(v)[2]=(a)[2]*(s))
67 gwlarson 3.1 #define ZERO_VEC3(v) (ZERO(v[0]) && ZERO(v[1]) && ZERO(v[2]) )
68 gwlarson 3.8 #define EQUAL_VEC3(a,b) (FEQUAL(a[0],b[0])&&FEQUAL(a[1],b[1])&&FEQUAL(a[2],b[2]))
69 gwlarson 3.7 #define OPP_EQUAL_VEC3(a,b) (EQUAL(a[0],-b[0])&&EQUAL(a[1],-b[1])&&EQUAL(a[2],-b[2]))
70 gwlarson 3.6 #define FZERO_VEC3(v) (FZERO(v[0]) && FZERO(v[1]) && FZERO(v[2]) )
71     #define FEQUAL_VEC3(a,b) (FEQUAL(a[0],b[0])&&FEQUAL(a[1],b[1])&&FEQUAL(a[2],b[2]))
72 gwlarson 3.1 #define NEGATE_VEC3(v) ((v)[0] *= -1.0,(v)[1] *= -1.0,(v)[2] *= -1.0)
73     #define COPY_VEC2(v1,v2) ((v1)[0]=(v2)[0],(v1)[1]=(v2)[1])
74     #define DIST(a,b) (sqrt(((a)[0]-(b)[0])*((a)[0]-(b)[0]) + \
75     ((a)[1]-(b)[1])*((a)[1]-(b)[1]) + \
76     ((a)[2]-(b)[2])*((a)[2]-(b)[2])))
77 gwlarson 3.3 #define DIST_SQ(a,b) (((a)[0]-(b)[0])*((a)[0]-(b)[0]) + \
78     ((a)[1]-(b)[1])*((a)[1]-(b)[1]) + \
79     ((a)[2]-(b)[2])*((a)[2]-(b)[2]))
80 gwlarson 3.1
81 gwlarson 3.7 #define SIGN(x) ((x<0)?-1:1)
82 gwlarson 3.1 #define CROSS_VEC2(v1,v2) (((v1)[0]*(v2)[1]) - ((v1)[1]*(v2)[0]))
83     #define DOT_VEC2(v1,v2) ((v1)[0]*(v2)[0] + (v1)[1]*(v2)[1])
84    
85 gwlarson 3.7 #define EDGE_MIDPOINT(a,v1,v2) ((a)[0]=((v1)[0]+(v2)[0])*0.5, \
86 gwlarson 3.1 (a)[1]=((v1)[1]+(v2)[1])*0.5,(a)[2] = ((v1)[2]+(v2)[2])*0.5)
87    
88     #define MIN_VEC3(v) ((v)[0]<(v)[1]?((v)[0]<(v)[2]?(v)[0]:v[2]): \
89     (v)[1]<(v)[2]?(v)[1]:(v)[2])
90 gwlarson 3.5 #define MAX3(a,b,c) (((b)>(a))?((b) > (c))?(b):(c):((a)>(c))?(a):(c))
91 greg 3.12 #define MIN3(a,b,c) (((b)<(a))?((b) < (c))?(b):(c):((a)<(c))?(a):(c))
92    
93 gwlarson 3.5 #define MAX(a,b) (((b)>(a))?(b):(a))
94     #define MIN(a,b) (((b)<(a))?(b):(a))
95 gwlarson 3.2
96 gwlarson 3.1 #define SUM_3VEC3(r,a,b,c) ((r)[0]=(a)[0]+(b)[0]+(c)[0], \
97     (r)[1]=(a)[1]+(b)[1]+(c)[1],(r)[2]=(a)[2]+(b)[2]+(c)[2])
98    
99     #define NTH_BIT(n,i) ((n) & (1<<(i)))
100     #define SET_NTH_BIT(n,i) ((n) |= (1<<(i)))
101    
102 greg 3.12 #define PT_ON_PLANE(p,peq) (DOT(FP_N(peq),p)+FP_D(peq))
103 gwlarson 3.1
104 greg 3.12 /* FUNCTIONS:
105     int point_in_cone(FVECT p,a,b,c)
106     void triangle_centroid(FVECT v0,v1,v2,c)
107     double tri_normal(FVECT v0,v1,v2,n,int norm)
108     void tri_plane_equation(FVECT v0,v1,v2,FPEQ *peqptr,int norm)
109     int intersect_ray_plane(FVECT orig,dir,FPEQ peq,double *pd,FVECT r)
110     double point_on_sphere(FVECT ps,p,c)
111     int point_in_stri(FVECT v0,v1,v2,p)
112     int ray_intersect_tri(FVECT orig,dir,v0,v1,v2,pt)
113     void calculate_view_frustum(FVECT vp,hv,vv,double horiz,vert,near,far,
114     FVECT fnear[4],ffar[4])
115     void bary2d(double x1,y1,x2,y2,x3,y3,px,py,coord)
116     */
117 gwlarson 3.1 double tri_normal();
118 gwlarson 3.7 double point_on_sphere();
119 gwlarson 3.1
120    
121 gwlarson 3.7