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/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
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/* SCCSid "$SunId$ SGI" */ |
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|
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/* |
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* sm_geom.h |
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*/ |
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|
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/* Assumes included after standard.h */ |
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#include <values.h> |
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|
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#define ZERO(x) ((x) < FTINY && (x) > -FTINY) |
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#define EQUAL(a,b) ZERO((a) - (b)) |
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#ifndef TRUE |
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#define TRUE 1 |
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#define FALSE 0 |
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#endif |
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|
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typedef struct _FPEQ { |
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FVECT n; |
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double d; |
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char x,y,z; |
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}FPEQ; |
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|
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#define FP_N(f) ((f).n) |
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#define FP_D(f) ((f).d) |
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#define FP_X(f) ((f).x) |
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#define FP_Y(f) ((f).y) |
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#define FP_Z(f) ((f).z) |
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typedef long BCOORD; |
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typedef long BDIR; |
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typedef long TINT; |
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#define BITS_BCOORD (BITS(long)>>1) |
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#define SHIFT_MAXBCOORD (BITS_BCOORD-2) |
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#define MAXBCOORD (1L << SHIFT_MAXBCOORD) |
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#define MAXBCOORD2 (MAXBCOORD>>1) |
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#define MAXBDIR MAXBCOORD |
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#define MAXT MAXBCOORD |
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#define HUGET MAXLONG |
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|
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#define M_2_3_PI PI*2/3 |
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#ifndef INVALID |
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#define INVALID -1 |
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#endif |
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|
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#define GT_INVALID 0 |
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#define GT_VERTEX 1 |
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#define GT_EDGE 2 |
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#define GT_FACE 4 |
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#define GT_INTERIOR 8 |
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#define GT_INTERSECT 16 |
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#define GT_ADJACENT 32 |
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#define GT_OUT 64 |
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#define ZERO_VEC3(v) (ZERO(v[0]) && ZERO(v[1]) && ZERO(v[2]) ) |
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#define EQUAL_VEC3(a,b) (EQUAL(a[0],b[0])&&EQUAL(a[1],b[1])&&EQUAL(a[2],b[2])) |
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#define NEGATE_VEC3(v) ((v)[0] *= -1.0,(v)[1] *= -1.0,(v)[2] *= -1.0) |
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#define COPY_VEC2(v1,v2) ((v1)[0]=(v2)[0],(v1)[1]=(v2)[1]) |
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#define DIST(a,b) (sqrt(((a)[0]-(b)[0])*((a)[0]-(b)[0]) + \ |
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((a)[1]-(b)[1])*((a)[1]-(b)[1]) + \ |
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((a)[2]-(b)[2])*((a)[2]-(b)[2]))) |
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#define DIST_SQ(a,b) (((a)[0]-(b)[0])*((a)[0]-(b)[0]) + \ |
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((a)[1]-(b)[1])*((a)[1]-(b)[1]) + \ |
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((a)[2]-(b)[2])*((a)[2]-(b)[2])) |
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#define CROSS_VEC2(v1,v2) (((v1)[0]*(v2)[1]) - ((v1)[1]*(v2)[0])) |
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#define DOT_VEC2(v1,v2) ((v1)[0]*(v2)[0] + (v1)[1]*(v2)[1]) |
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#define EDGE_MIDPOINT_VEC3(a,v1,v2) ((a)[0]=((v1)[0]+(v2)[0])*0.5, \ |
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(a)[1]=((v1)[1]+(v2)[1])*0.5,(a)[2] = ((v1)[2]+(v2)[2])*0.5) |
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#define MIN_VEC3(v) ((v)[0]<(v)[1]?((v)[0]<(v)[2]?(v)[0]:v[2]): \ |
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(v)[1]<(v)[2]?(v)[1]:(v)[2]) |
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#define MAX3(a,b,c) (((b)>(a))?((b) > (c))?(b):(c):((a)>(c))?(a):(c)) |
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#define MIN3(a,b,c) (((b)<(a))?((b) < (c))?(b):(c):((a)<(c))?(a):(c)) |
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#define MAX(a,b) (((b)>(a))?(b):(a)) |
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#define MIN(a,b) (((b)<(a))?(b):(a)) |
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#define SUM_3VEC3(r,a,b,c) ((r)[0]=(a)[0]+(b)[0]+(c)[0], \ |
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(r)[1]=(a)[1]+(b)[1]+(c)[1],(r)[2]=(a)[2]+(b)[2]+(c)[2]) |
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#define NTH_BIT(n,i) ((n) & (1<<(i))) |
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#define SET_NTH_BIT(n,i) ((n) |= (1<<(i))) |
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/* int convex_angle(FVECT v0,FVECT v1,FVECT v2) */ |
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/* void triangle_centroid(FVECT v0,FVECT v1,FVECT v2,FVECT c) */ |
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/* void triangle_plane_equation(FVECT v0,FVECT v1,FVECT v2,FVECT n,double *nd, |
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char norm) */ |
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/* int vec3_equal(FVECT v1,v2) */ |
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/* int point_relative_to_plane(FVECT p,FVECT n, double nd) */ |
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/* int point_in_circle(FVECT p,FVECT p0,FVECT p1) */ |
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/* int intersect_line_plane(FVECT r,FVECT p1,FVECT p2,float *plane) */ |
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/* int point_in_cone(FVECT p,FVECT p1,FVECT p2,FVECT p3,FVECT p4) */ |
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/* void point_on_sphere(FVECT ps,FVECT p,FVECT c) */ |
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/* int test_point_against_spherical_tri(FVECT v0,FVECT v1,FVECT v2,FVECT p, |
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FVECT n,char *nset,char *which,char sides[3]) */ |
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/* int test_single_point_against_spherical_tri(FVECT v0,FVECT v1,FVECT v2, |
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FVECT p,char *which )*/ |
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/* int test_vertices_for_tri_inclusion(FVECT tri[3],FVECT pts[3],char *nset, |
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FVECT n[3],FVECT avg,char pt_sides[3][3]); */ |
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/* void set_sidedness_tests(FVECT tri[3],FVECT pts[3],char test[3], |
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char sides[3][3],char nset,FVECT n[3]) |
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*/ |
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/* int cs_spherical_edge_edge_test(FVECT n[2][3],int i,int j,FVECT avg[2]) */ |
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/* int spherical_tri_tri_intersect(FVECT a1,FVECT a2,FVECT a3, |
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FVECT b1,FVECT b2,FVECT b3) */ |
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/* void calculate_view_frustum(FVECT vp,hv,vv,double horiz,vert,near,far, |
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FVECT fnear[4],FVECT ffar[4]) |
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*/ |
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/* double triangle_normal_Newell(FVECT v0,FVECT v1,FVECT v2,FVECT n,char n)*/ |
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double tri_normal(); |
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/* double spherical_edge_normal(FVECT v0,FVECT v1,FVECT n,char norm) */ |
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double spherical_edge_normal(); |
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#define point_in_stri_n(n0,n1,n2,p) \ |
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((DOT(n0,p)<=0.0)&&(DOT(n1,p)<=0.0)&&(DOT(n2,p)<=0.0)) |
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#define PT_ON_PLANE(p,peq) (DOT(FP_N(peq),p)+FP_D(peq)) |
