| Geant4 Cross Reference |
1 // Copyright (C) 2010, Guy Barrand. All rights reserved.
2 // See the file tools.license for terms.
3
4 #ifndef tools_sg_tex_rect
5 #define tools_sg_tex_rect
6
7 // node to render an RGB tools::img_byte with ::glTexImage2D.
8
9 //#define TOOLS_SG_TEX_RECT_DEBUG
10
11 #include "node"
12 #include "render_action"
13 #include "pick_action"
14 #include "bbox_action"
15 #include "event_action"
16 #include "render_manager"
17 #include "gstos"
18 #include "base_tex"
19
20 #include "../pointer"
21 #include "../num2s"
22
23 namespace tools {
24 namespace sg {
25
26 class tex_rect : public node, public gstos, public base_tex {
27 TOOLS_NODE_NO_CAST(tex_rect,tools::sg::tex_rect,node)
28 public:
29 virtual void* cast(const std::string& a_class) const {
30 {if(void* p = cmp_cast<tex_rect>(this,a_class)) return p;}
31 {if(void* p = base_tex::cast(a_class)) return p;}
32 return parent::cast(a_class);
33 }
34 public:
35 sf<bool> show_border;
36 sf<float> height;
37 public:
38 virtual const desc_fields& node_desc_fields() const {
39 TOOLS_FIELD_DESC_NODE_CLASS(tools::sg::tex_rect)
40 static const desc_fields s_v(parent::node_desc_fields(),6, //WARNING : take care of count.
41 TOOLS_ARG_FIELD_DESC(img),
42 TOOLS_ARG_FIELD_DESC(back_color),
43 TOOLS_ARG_FIELD_DESC(expand),
44 TOOLS_ARG_FIELD_DESC(limit),
45 TOOLS_ARG_FIELD_DESC(show_border),
46 TOOLS_ARG_FIELD_DESC(height)
47 );
48 return s_v;
49 }
50 private:
51 void add_fields(){
52 add_field(&img);
53 add_field(&back_color);
54 add_field(&expand);
55 add_field(&limit);
56 add_field(&show_border);
57 add_field(&height);
58 }
59 public:
60 virtual void render(render_action& a_action) {
61 #ifdef TOOLS_SG_TEX_RECT_DEBUG
62 a_action.out() << "tools::tex_rect::render : begin : 001 : " << std::endl;
63 #endif
64
65 //NOTE : we draw border (show_border is true) and background even if
66 // gen_texture() failed.
67
68 if(touched()) {
69 #ifdef TOOLS_SG_TEX_RECT_DEBUG
70 a_action.out() << "tools::tex_rect::render : touched." << std::endl;
71 #endif
72 update_sg(a_action.out());
73 reset_touched();
74 }
75 if(m_img.is_empty()) {
76 #ifdef TOOLS_SG_TEX_RECT_DEBUG
77 a_action.out() << "tools::tex_rect::render : m_img is empty." << std::endl;
78 #endif
79 return;
80 }
81
82 #ifdef TOOLS_SG_TEX_RECT_DEBUG
83 a_action.out() << "tools::tex_rect::render : have a m_img. get_tex_id ..." << std::endl;
84 #endif
85
86 unsigned int _id = get_tex_id(a_action.out(),a_action.render_manager(),m_img,nearest.value());
87
88 #ifdef TOOLS_SG_TEX_RECT_DEBUG
89 a_action.out() << "tools::tex_rect::render : get_tex_id : " << _id << "." << std::endl;
90 #endif
91
92 const state& state = a_action.state();
93
94 //image must be 2^n,2^m in size !
95 // exa : 128x64
96
97 f12 xyzs;
98
99 if(show_border.value()) {
100 #ifdef TOOLS_SG_TEX_RECT_DEBUG
101 a_action.out() << "tools::tex_rect::render : show_border." << std::endl;
102 #endif
103 f12 nms;
104 _front(xyzs,nms,0.01f);
105
106 a_action.color4f(1,0,0,1);
107 a_action.line_width(4);
108
109 a_action.draw_vertex_array(gl::line_loop(),12,xyzs);
110
111 //pushes back the filled polygons to avoid z-fighting with lines
112 a_action.set_polygon_offset(true);
113
114 a_action.color4f(state.m_color);
115 a_action.line_width(state.m_line_width);
116 }
117
118 #ifdef TOOLS_SG_TEX_RECT_DEBUG
119 a_action.out() << "tools::tex_rect::render : draw back face." << std::endl;
120 #endif
121
122 //draw a back face pointing toward negative z :
123 {a_action.color4f(back_color.value());
124 f18 tris,nms;
125 _tris(tris,nms);
126 a_action.draw_vertex_normal_array(gl::triangles(),18,tris,nms);
127 a_action.color4f(state.m_color);}
128
129 if(_id) {
130 #ifdef TOOLS_SG_TEX_RECT_DEBUG
131 a_action.out() << "tools::tex_rect::render : draw_vertex_normal_array_texture." << std::endl;
132 #endif
133 f12 nms;
134 _front(xyzs,nms);
135 float tcs[8];
136 set_tcs(tcs);
137 a_action.draw_vertex_normal_array_texture(gl::triangle_fan(),12,xyzs,nms,_id,tcs);
138 }
139 a_action.set_polygon_offset(state.m_GL_POLYGON_OFFSET_FILL);
140 }
141 virtual void pick(pick_action& a_action) {
142 if(touched()) {
143 update_sg(a_action.out());
144 reset_touched();
145 }
146 if(m_img.is_empty()) return;
147 f12 xyzs,nms;
148 _front(xyzs,nms);
149 a_action.add__primitive(*this,gl::triangle_fan(),12,xyzs,true);
150 }
151
152 virtual void bbox(bbox_action& a_action) {
153 if(touched()) {
154 update_sg(a_action.out());
155 reset_touched();
156 }
157 if(m_img.is_empty()) return;
158 f12 xyzs,nms;
159 _front(xyzs,nms);
160 a_action.add_points(12,xyzs);
161 }
162 public:
163 virtual bool intersect_value(std::ostream&,intersect_type,const line<vec3f>& a_line,std::string& a_s) const {
164 // a_line is in local world coordinate.
165
166 const img_byte& _img = img.value();
167 if(_img.is_empty()) {a_s.clear();return false;}
168
169 float aspect = float(_img.width())/float(_img.height());
170 float h2 = height.value()*0.5f;
171 float w2 = aspect*h2;
172
173 plane<vec3f> plane(vec3f(w2,h2,0),vec3f(-w2,h2,0),vec3f(-w2,-h2,0));
174 vec3f p;
175 if(!plane.intersect(a_line,p)) {a_s.clear();return false;}
176
177 float imw = (float)_img.width();
178 float imh = (float)_img.height();
179
180 //image coordinates :
181 int ix = int((imw*p.x()/w2+imw)*0.5f);
182 int iy = int((imh*p.y()/h2+imh)*0.5f);
183
184 //rgb of pixel :
185 std::vector<unsigned char> pixel;
186 if((ix<0)||(iy<0)||!_img.pixel(ix,iy,pixel)) {a_s.clear();return false;}
187
188 a_s.clear();
189 for(unsigned int ipix=0;ipix<pixel.size();ipix++) {
190 if(ipix) a_s += " ";
191 if(!numas<float>(float(pixel[ipix])/255.0f,a_s)){}
192 }
193
194 return true;
195 }
196 public:
197 tex_rect()
198 :parent()
199 ,base_tex()
200 ,show_border(false)
201 ,height(1)
202 {
203 add_fields();
204 }
205 virtual ~tex_rect(){}
206 public:
207 tex_rect(const tex_rect& a_from)
208 :parent(a_from)
209 ,gstos(a_from)
210 ,base_tex(a_from)
211 ,show_border(a_from.show_border)
212 ,height(a_from.height)
213 {
214 add_fields();
215 }
216 tex_rect& operator=(const tex_rect& a_from){
217 parent::operator=(a_from);
218 gstos::operator=(a_from);
219 base_tex::operator=(a_from);
220 if(&a_from==this) return *this;
221 show_border = a_from.show_border;
222 height = a_from.height;
223 return *this;
224 }
225 public:
226
227 //const img_byte& rendered_img() const {return m_img;}
228
229 void rendered_size(std::ostream& a_out,unsigned int& a_w,unsigned int& a_h) {
230 update_sg(a_out);
231 reset_touched();
232 a_w = m_img.width();
233 a_h = m_img.height();
234 }
235
236 protected:
237 //virtual //NOTE : virtual for diaporama node. (but warning with clang -g4flags).
238 void update_sg(std::ostream& a_out) {
239 clean_gstos(); //must reset for all render_manager.
240 if(height.value()<=0) {
241 m_img.make_empty();
242 return;
243 }
244 base_tex::_update_sg_(a_out);
245 }
246 protected:
247
248 typedef float f12[12];
249 void _front(f12& front,f12& nms,float a_epsil = 0.0f) { //[12]
250 float aspect = float(img.value().width())/float(img.value().height());
251 float h2 = height*0.5f;
252 float w2 = aspect*h2;
253
254 h2 += a_epsil;
255 w2 += a_epsil;
256
257 front[0] = -w2;
258 front[1] = -h2;
259 front[2] = 0;
260
261 front[3] = w2;
262 front[4] = -h2;
263 front[5] = 0;
264
265 front[6] = w2;
266 front[7] = h2;
267 front[8] = 0;
268
269 front[ 9] = -w2;
270 front[10] = h2;
271 front[11] = 0;
272
273 nms[0] = 0;
274 nms[1] = 0;
275 nms[2] = 1;
276
277 nms[3] = 0;
278 nms[4] = 0;
279 nms[5] = 1;
280
281 nms[6] = 0;
282 nms[7] = 0;
283 nms[8] = 1;
284
285 nms[9] = 0;
286 nms[10] = 0;
287 nms[11] = 1;
288 }
289
290 void _back(f12& back) { //[12]
291 float aspect = float(img.value().width())/float(img.value().height());
292 float h2 = height*0.5f;
293 float w2 = aspect*h2;
294 float d2 = 0;
295
296 back[0] = w2;back[ 1] = -h2;back[ 2] = d2;
297 back[3] = -w2;back[ 4] = -h2;back[ 5] = d2;
298 back[6] = -w2;back[ 7] = h2;back[ 8] = d2;
299 back[9] = w2;back[10] = h2;back[11] = d2;
300 }
301
302 typedef float f18[18];
303 void _tris(f18& tris,f18& nms){
304 f12 back;
305 _back(back);
306
307 tris[0] = back[0];
308 tris[1] = back[1];
309 tris[2] = back[2];
310
311 tris[3] = back[3];
312 tris[4] = back[4];
313 tris[5] = back[5];
314
315 tris[6] = back[6];
316 tris[7] = back[7];
317 tris[8] = back[8];
318 //
319 tris[9] = back[6];
320 tris[10] = back[7];
321 tris[11] = back[8];
322
323 tris[12] = back[9];
324 tris[13] = back[10];
325 tris[14] = back[11];
326
327 tris[15] = back[0];
328 tris[16] = back[1];
329 tris[17] = back[2];
330
331 ///////////////////// back
332 nms[0] = 0;
333 nms[1] = 0;
334 nms[2] = -1;
335
336 nms[3] = 0;
337 nms[4] = 0;
338 nms[5] = -1;
339
340 nms[6] = 0;
341 nms[7] = 0;
342 nms[8] = -1;
343 //
344 nms[9] = 0;
345 nms[10] = 0;
346 nms[11] = -1;
347
348 nms[12] = 0;
349 nms[13] = 0;
350 nms[14] = -1;
351
352 nms[15] = 0;
353 nms[16] = 0;
354 nms[17] = -1;
355 }
356 };
357
358 }}
359
360 #endif