summaryrefslogtreecommitdiff
path: root/Build/source/utils/asymptote/drawpath3.cc
blob: b41c69a1114146daffbec13a0dbbefe4ddc3fbed (plain)
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
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
/*****
 * drawpath3.cc
 *
 * Stores a path3 that has been added to a picture.
 *****/

#include "drawpath3.h"

namespace camp {

using vm::array;
  
bool drawPath3::write(prcfile *out, unsigned int *count, array *, array *,
                      double, groupsmap&)
{
  Int n=g.length();
  if(n == 0 || invisible)
    return true;

  if(straight) {
    Triple *controls=new(UseGC) Triple[n+1];
    for(Int i=0; i <= n; ++i)
      store(controls[i],g.point(i));
    
    out->addLine(n+1,controls,color);
  } else {
    int m=3*n+1;
    Triple *controls=new(UseGC) Triple[m];
    store(controls[0],g.point((Int) 0));
    store(controls[1],g.postcontrol((Int) 0));
    size_t k=1;
    for(Int i=1; i < n; ++i) {
      store(controls[++k],g.precontrol(i));
      store(controls[++k],g.point(i));
      store(controls[++k],g.postcontrol(i));
    }
    store(controls[++k],g.precontrol(n));
    store(controls[++k],g.point(n));
    out->addBezierCurve(m,controls,color);
  }
  
  return true;
}

void drawPath3::render(GLUnurbs *nurb, double, const triple&, const triple&,
                       double, bool transparent)
{
#ifdef HAVE_GL
  Int n=g.length();
  if(n == 0 || invisible || ((color.A < 1.0) ^ transparent))
    return;

  bool havebillboard=interaction == BILLBOARD;
  
  GLfloat Diffuse[]={0.0,0.0,0.0,color.A};
  glMaterialfv(GL_FRONT,GL_DIFFUSE,Diffuse);
  
  static GLfloat Black[]={0.0,0.0,0.0,1.0};
  glMaterialfv(GL_FRONT,GL_AMBIENT,Black);
    
  GLfloat Emissive[]={color.R,color.G,color.B,color.A};
  glMaterialfv(GL_FRONT,GL_EMISSION,Emissive);
    
  glMaterialfv(GL_FRONT,GL_SPECULAR,Black);
  
  glMaterialf(GL_FRONT,GL_SHININESS,128.0);
  
  if(havebillboard) BB.init();
  
  if(straight) {
    glBegin(GL_LINE_STRIP);
    for(Int i=0; i <= n; ++i) {
      triple v=g.point(i);
      if(havebillboard) {
        static GLfloat controlpoints[3];
        BB.store(controlpoints,v,center);
        glVertex3fv(controlpoints);
      } else
        glVertex3f(v.getx(),v.gety(),v.getz());
    }
    glEnd();
  } else {
    for(Int i=0; i < n; ++i) {
      static GLfloat knots[8]={0.0,0.0,0.0,0.0,1.0,1.0,1.0,1.0};
      static GLfloat controlpoints[12];
      if(havebillboard) {
        BB.store(controlpoints,g.point(i),center);
        BB.store(controlpoints+3,g.postcontrol(i),center);
        BB.store(controlpoints+6,g.precontrol(i+1),center);
        BB.store(controlpoints+9,g.point(i+1),center);
      } else {
        store(controlpoints,g.point(i));
        store(controlpoints+3,g.postcontrol(i));
        store(controlpoints+6,g.precontrol(i+1));
        store(controlpoints+9,g.point(i+1));
      }
      
      gluBeginCurve(nurb);
      gluNurbsCurve(nurb,8,knots,3,controlpoints,4,GL_MAP1_VERTEX_3);
      gluEndCurve(nurb);
    }
  }
#endif
}

drawElement *drawPath3::transformed(const array& t)
{
  return new drawPath3(t,this);
}
  
bool drawNurbsPath3::write(prcfile *out, unsigned int *count, array *index,
                           array *origin, double, groupsmap&)
{
  if(invisible)
    return true;

  out->addCurve(degree,n,controls,knots,color,weights);
  
  return true;
}

// Approximate bounds by bounding box of control polyhedron.
void drawNurbsPath3::bounds(bbox3& b)
{
  double *v=controls[0];
  double x=v[0];
  double y=v[1];
  double z=v[2];
  double X=x;
  double Y=y;
  double Z=z;
  for(size_t i=1; i < n; ++i) {
    double *v=controls[i];
    double vx=v[0];
    x=min(x,vx);
    X=max(X,vx);
    double vy=v[1];
    y=min(y,vy);
    Y=max(Y,vy);
    double vz=v[2];
    z=min(z,vz);
    Z=max(Z,vz);
  }

  Min=triple(x,y,z);
  Max=triple(X,Y,Z);
  b.add(Min);
  b.add(Max);
}

drawElement *drawNurbsPath3::transformed(const array& t)
{
  return new drawNurbsPath3(t,this);
}

void drawNurbsPath3::ratio(pair &b, double (*m)(double, double), double,
                           bool &first)
{
  if(first) {
    first=false;
    double *ci=controls[0];
    triple v=triple(ci[0],ci[1],ci[2]);
    b=pair(xratio(v),yratio(v));
  }
  
  double x=b.getx();
  double y=b.gety();
  for(size_t i=0; i < n; ++i) {
    double *ci=controls[i];
    triple v=triple(ci[0],ci[1],ci[2]);
    x=m(x,xratio(v));
    y=m(y,yratio(v));
  }
  b=pair(x,y);
}

void drawNurbsPath3::displacement()
{
#ifdef HAVE_GL
  size_t nknots=degree+n+1;
  if(Controls == NULL) {
    Controls=new(UseGC)  GLfloat[(weights ? 4 : 3)*n];
    Knots=new(UseGC) GLfloat[nknots];
  }
  if(weights)
    for(size_t i=0; i < n; ++i)
      store(Controls+4*i,controls[i],weights[i]);
  else
    for(size_t i=0; i < n; ++i)
      store(Controls+3*i,controls[i]);
  
  for(size_t i=0; i < nknots; ++i)
    Knots[i]=knots[i];
#endif  
}

void drawNurbsPath3::render(GLUnurbs *nurb, double, const triple&,
                            const triple&, double, bool transparent)
{
#ifdef HAVE_GL
  if(invisible || ((color.A < 1.0) ^ transparent))
    return;
  
  GLfloat Diffuse[]={0.0,0.0,0.0,color.A};
  glMaterialfv(GL_FRONT,GL_DIFFUSE,Diffuse);
  
  static GLfloat Black[]={0.0,0.0,0.0,1.0};
  glMaterialfv(GL_FRONT,GL_AMBIENT,Black);
    
  GLfloat Emissive[]={color.R,color.G,color.B,color.A};
  glMaterialfv(GL_FRONT,GL_EMISSION,Emissive);
    
  glMaterialfv(GL_FRONT,GL_SPECULAR,Black);
  
  glMaterialf(GL_FRONT,GL_SHININESS,128.0);
  
  if(weights)
    gluNurbsCallback(nurb,GLU_NURBS_VERTEX,(_GLUfuncptr) glVertex4fv);
  else gluNurbsCallback(nurb,GLU_NURBS_VERTEX,(_GLUfuncptr) glVertex3fv);

  gluBeginCurve(nurb);
  int order=degree+1;
  gluNurbsCurve(nurb,order+n,Knots,weights ? 4 : 3,Controls,order,
                weights ? GL_MAP1_VERTEX_4 : GL_MAP1_VERTEX_3);
  gluEndCurve(nurb);
  
  if(weights)
    gluNurbsCallback(nurb,GLU_NURBS_VERTEX,(_GLUfuncptr) glVertex3fv);
#endif
}

} //namespace camp