1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
/*****
* drawsurface.h
*
* Stores a surface that has been added to a picture.
*****/
#ifndef DRAWSURFACE_H
#define DRAWSURFACE_H
#include "drawelement.h"
#include "triple.h"
#include "arrayop.h"
#include "path3.h"
namespace camp {
class drawSurface : public drawElement {
protected:
Triple controls[16];
bool straight;
RGBAColour diffuse;
RGBAColour ambient;
RGBAColour emissive;
RGBAColour specular;
double opacity;
double shininess;
double granularity;
triple normal;
bool lighton;
bool invisible;
triple Min,Max;
static triple c3[16];
GLfloat *colors;
bool havecolors;
#ifdef HAVE_LIBGL
GLfloat c[48];
triple d; // Maximum deviation of surface from a quadrilateral.
triple dperp;
GLfloat v1[16];
GLfloat v2[16];
GLfloat Normal[3];
bool havenormal;
bool havetransparency;
#endif
void storecolor(int i, const vm::array &pens, int j) {
pen p=vm::read<camp::pen>(pens,j);
p.torgb();
colors[i]=p.red();
colors[i+1]=p.green();
colors[i+2]=p.blue();
colors[i+3]=p.opacity();
}
public:
drawSurface(const vm::array& g, bool straight, const vm::array&p,
double opacity, double shininess, double granularity,
triple normal, bool lighton, const vm::array &pens) :
straight(straight), opacity(opacity), shininess(shininess),
granularity(granularity), normal(unit(normal)), lighton(lighton) {
string wrongsize=
"Bezier surface patch requires 4x4 array of triples and array of 4 pens";
if(checkArray(&g) != 4 || checkArray(&p) != 4)
reportError(wrongsize);
pen surfacepen=vm::read<camp::pen>(p,0);
invisible=surfacepen.invisible();
diffuse=rgba(surfacepen);
ambient=rgba(vm::read<camp::pen>(p,1));
emissive=rgba(vm::read<camp::pen>(p,2));
specular=rgba(vm::read<camp::pen>(p,3));
#ifdef HAVE_LIBGL
int size=checkArray(&pens);
havecolors=size > 0;
if(havecolors) {
colors=new GLfloat[16];
if(size != 4) reportError(wrongsize);
storecolor(0,pens,0);
storecolor(4,pens,1);
storecolor(12,pens,2);
storecolor(8,pens,3);
}
#endif
size_t k=0;
for(size_t i=0; i < 4; ++i) {
vm::array *gi=vm::read<vm::array*>(g,i);
size_t gisize=checkArray(gi);
if(gisize != 4)
reportError(wrongsize);
for(size_t j=0; j < 4; ++j) {
triple v=vm::read<triple>(gi,j);
controls[k][0]=v.getx();
controls[k][1]=v.gety();
controls[k][2]=v.getz();
++k;
}
}
}
drawSurface(const vm::array& t, const drawSurface *s) :
straight(s->straight), diffuse(s->diffuse), ambient(s->ambient),
emissive(s->emissive), specular(s->specular), opacity(s->opacity),
shininess(s->shininess), granularity(s->granularity), lighton(s->lighton),
invisible(s->invisible), colors(s->colors), havecolors(s->havecolors) {
for(size_t i=0; i < 16; ++i) {
const double *c=s->controls[i];
triple v=run::operator *(t,triple(c[0],c[1],c[2]));
controls[i][0]=v.getx();
controls[i][1]=v.gety();
controls[i][2]=v.getz();
}
normal=run::multshiftless(t,s->normal);
}
bool is3D() {return true;}
void bounds(bbox3& b);
void bounds(pair &b, double (*m)(double, double),
double (*x)(const triple&, double*),
double (*y)(const triple&, double*),
double *t, bool &first);
virtual ~drawSurface() {
if(havecolors)
delete[] colors;
}
bool write(prcfile *out);
void displacement();
void render(GLUnurbs *nurb, double, const triple& Min, const triple& Max,
double perspective, bool transparent);
drawElement *transformed(const vm::array& t);
};
}
#endif
|
