pickables.cpp 25.7 KB
Newer Older
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
/*******************************************************************************
 * CGoGN: Combinatorial and Geometric modeling with Generic N-dimensional Maps  *
 * version 0.1                                                                  *
 * Copyright (C) 2009-2011, IGG Team, LSIIT, University of Strasbourg           *
 *                                                                              *
 * This library is free software; you can redistribute it and/or modify it      *
 * under the terms of the GNU Lesser General Public License as published by the *
 * Free Software Foundation; either version 2.1 of the License, or (at your     *
 * option) any later version.                                                   *
 *                                                                              *
 * This library is distributed in the hope that it will be useful, but WITHOUT  *
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or        *
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License  *
 * for more details.                                                            *
 *                                                                              *
 * You should have received a copy of the GNU Lesser General Public License     *
 * along with this library; if not, write to the Free Software Foundation,      *
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.           *
 *                                                                              *
 * Web site: http://cgogn.u-strasbg.fr/                                         *
 * Contact information: cgogn@unistra.fr                                        *
 *                                                                              *
 *******************************************************************************/

#include "Utils/pickables.h"
#include "glm/gtc/matrix_transform.hpp"
27
#include "glm/gtx/norm.hpp"
28 29 30
#include "Geometry/distances.h"
#include "Geometry/intersection.h"
#include <algorithm>
thery's avatar
thery committed
31 32
#define _USE_MATH_DEFINES
#include <math.h>
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

namespace CGoGN
{

namespace Utils
{

LineDrawable::LineDrawable()
{
	m_vboPos = new VBO();
	m_vboPos->setDataSize(3);

	m_shader = new ShaderSimpleColor();

	m_shader->setAttributePosition(m_vboPos);
	m_shader->setColor(Geom::Vec4f(1.,1.,0.,0.));
	GLSLShader::registerShader(NULL, m_shader);

	glGenBuffers(1, &m_ind);
}

LineDrawable::~LineDrawable()
{
	delete m_vboPos;
	GLSLShader::unregisterShader(NULL, m_shader);
	delete m_shader;

	glDeleteBuffers(1, &m_ind);
}


void LineDrawable::setColor(const Geom::Vec4f& col)
{
66
	m_color=col;
67 68 69
	m_shader->setColor(col);
}

70 71 72 73 74
const Geom::Vec4f&  LineDrawable::getColor()
{
	return m_color;
}

75 76 77 78 79 80 81
void LineDrawable::draw()
{
	m_shader->enableVertexAttribs();
	glDrawArrays(GL_LINES, 0, m_nb);
	m_shader->disableVertexAttribs();
}

82 83 84 85 86
void LineDrawable::getPrecisionDrawing(unsigned int& sub, unsigned int& sub2)
{
	sub = m_sub1;
	sub2 = m_sub2;
}
87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109


Pickable::Pickable(LineDrawable* ld, unsigned int id):
	m_drawable(ld),m_transfo(1.0f), m_id(id)
{
}

void Pickable::invertPV(const Geom::Vec3f& P, const Geom::Vec3f& V, const glm::mat4& transfo, Geom::Vec3f& PP, Geom::Vec3f& VV)
{
	glm::mat4 invtr = glm::inverse(transfo);
	glm::vec4 xP(P[0],P[1],P[2],1.0f);
	glm::vec4 xQ(P[0]+V[0],P[1]+V[1],P[2]+V[2],1.0f);

	glm::vec4 tP = invtr*xP;
	glm::vec4 tQ = invtr*xQ;

	PP = Geom::Vec3f(tP[0]/tP[3], tP[1]/tP[3], tP[2]/tP[3]);
	VV = Geom::Vec3f(tQ[0]/tQ[3] - PP[0], tQ[1]/tQ[3] - PP[1], tQ[2]/tQ[3]- PP[2]);
}




110
bool Pickable::pick(const Geom::Vec3f& P, const Geom::Vec3f& V,  Geom::Vec3f& I, float epsilon)
111 112 113 114 115
{
	Geom::Vec3f PP;
	Geom::Vec3f VV;
	invertPV(P,V,m_transfo,PP,VV);

116
	return m_drawable->pick(PP,VV,I,epsilon) != 0;
117 118 119 120 121 122 123 124 125 126 127

}


void Pickable::draw()
{
	glm::mat4 store = Utils::GLSLShader::currentTransfo();
	Utils::GLSLShader::currentTransfo() *= m_transfo;
	Utils::GLSLShader::updateCurrentMatrices();
	m_drawable->draw();
	Utils::GLSLShader::currentTransfo() = store;
128
	Utils::GLSLShader::updateCurrentMatrices();
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
}


glm::mat4&  Pickable::transfo()
{
	return m_transfo;
}

void Pickable::rotate(float angle, const Geom::Vec3f& Axis)
{
	m_transfo = glm::rotate(m_transfo, angle, glm::vec3(Axis[0],Axis[1],Axis[2]));
}
//void Pickable::rotate(float angle, const Geom::Vec3f& Axis)
//{
//	glm::mat4 tr = glm::rotate(glm::mat4(1.0f), angle, glm::vec3(Axis[0],Axis[1],Axis[2]));
//	m_transfo = tr*m_transfo;
//}

void Pickable::translate(const Geom::Vec3f& P)
{
	m_transfo = glm::translate(m_transfo, glm::vec3(P[0],P[1],P[2]));
}
//void Pickable::translate(const Geom::Vec3f& P)
//{
//	glm::mat4 tr = glm::translate(glm::mat4(1.0f), glm::vec3(P[0],P[1],P[2]));
//	m_transfo = tr*m_transfo;
//}

void Pickable::scale(const Geom::Vec3f& S)
{
	m_transfo = glm::scale(m_transfo, glm::vec3(S[0],S[1],S[2]));
}
//void Pickable::scale(const Geom::Vec3f& S)
//{
//	glm::mat4 tr = glm::scale(glm::mat4(1.0f), glm::vec3(S[0],S[1],S[2]));
//	m_transfo = tr*m_transfo;
//}


// TODO check why BUG
void Pickable::randomOrientation()
{
	Geom::Vec3f V1(float(rand() - RAND_MAX/2), float(rand() - RAND_MAX/2), float(rand() - RAND_MAX/2));
	V1.normalize();
	float angle = float(rand()%360);
	rotate(angle,V1);
}

void Pickable::randomScale(float min, float max)
{
	const unsigned int MAX_NB=10000;
	float amp = (max - min)/MAX_NB;
	float sx = float((rand()%MAX_NB))*amp + min;
	float sy = float((rand()%MAX_NB))*amp + min;
	float sz = float((rand()%MAX_NB))*amp + min;
	scale(Geom::Vec3f(sx,sy,sz));
}

void Pickable::randomUniformScale(float min, float max)
{
	const unsigned int MAX_NB=10000;
	float amp = (max - min)/MAX_NB;
	float sc = float((rand()%MAX_NB))*amp + min;

	scale(Geom::Vec3f(sc,sc,sc));
}



float Pickable::distancefrom(const Geom::Vec3f& P)
{
	Geom::Vec3f origin(m_transfo[3][0],m_transfo[3][1],m_transfo[3][2]);
	origin -= P;
	return float(origin.norm());
}


Pickable* Pickable::pick(const std::vector<Pickable*>& picks,const Geom::Vec3f& P, const Geom::Vec3f& V)
{
	float mdist = std::numeric_limits<float>::max();
	Pickable* res=NULL;
210
	Geom::Vec3f I;
211 212 213

	for (std::vector<Utils::Pickable*>::const_iterator it=picks.begin(); it != picks.end(); ++it)
	{
214
		if ((*it)->pick(P,V,I))
215
		{
216 217 218 219 220 221 222 223 224
			std::cout << "I="<<I <<std::endl;

//			float dist = (*it)->distancefrom(P);
			glm::mat4 tr = (*it)->transfo();
			glm::vec4 ii(I[0],I[1],I[2],1.0f);
			glm::vec4 IWglm = tr*ii;
			Geom::Vec3f IW(IWglm[0]/IWglm[3],IWglm[1]/IWglm[3],IWglm[2]/IWglm[3]);
			IW -= P;
			float dist = IW.norm();
225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242
			if (dist < mdist)
			{
				res = *it;
				mdist = dist;
			}
		}
	}
	return res;
}


bool Pickable::distOrder(const std::pair<float, Pickable*>& e1, const std::pair<float, Pickable*>& e2)
{
	return (e1.first < e2.first);
}

std::vector<Pickable*> Pickable::sortedPick(std::vector<Pickable*>& picks, const Geom::Vec3f& P, const Geom::Vec3f& V)
{
243
	Geom::Vec3f I;
244 245 246 247 248
	std::vector< std::pair<float, Pickable*> > sorted;
	sorted.reserve(picks.size());

	for (std::vector<Utils::Pickable*>::const_iterator it=picks.begin(); it != picks.end(); ++it)
	{
249
		if ((*it)->pick(P,V,I))
250
		{
251 252 253 254 255 256 257
//			float dist = (*it)->distancefrom(P);
			glm::mat4 tr = (*it)->transfo();
			glm::vec4 ii(I[0],I[1],I[2],1.0f);
			glm::vec4 IWglm = tr*ii;
			Geom::Vec3f IW(IWglm[0]/IWglm[3],IWglm[1]/IWglm[3],IWglm[2]/IWglm[3]);
			IW -= P;
			float dist = IW.norm();
258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274
			sorted.push_back(std::pair<float, Pickable*>(dist,*it));
		}
	}

	std::sort(sorted.begin(), sorted.end(),distOrder);

	std::vector<Pickable*> res;
	res.reserve(sorted.size());
	for (unsigned int i=0; i<sorted.size(); ++i)
	{
		res.push_back(sorted[i].second);
	}

	return res;
}


275 276 277 278
Geom::Vec3f Pickable::getPosition()
{
	return Geom::Vec3f(m_transfo[3][0],m_transfo[3][1],m_transfo[3][2]);
}
279

280 281 282 283 284 285
Geom::Vec3f Pickable::getAxisScale(unsigned int ax, float& scale)
{
	Geom::Vec3f tempo(m_transfo[ax][0],m_transfo[ax][1],m_transfo[ax][2]);
	scale = tempo.normalize();
	return tempo;
}
286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318




Grid::Grid(unsigned int sub)
{
	changeTopo(sub);
}

void Grid::changeTopo(unsigned int sub)
{
	std::vector<Geom::Vec3f> points;
	points.resize((sub+1)*2*2);

	m_nb=0;

	for (unsigned int i=0; i<=sub; ++i)
	{
		float a = -1.0f + (2.0f/sub)*i;

		points[4*i] = Geom::Vec3f(a,-1.0f,0.0f);
		points[4*i+1] = Geom::Vec3f(a,1.0f,0.0f);
		points[4*i+2] = Geom::Vec3f(-1.0f,a,0.0f);
		points[4*i+3] = Geom::Vec3f(1.0f,a,0.0f);
		m_nb+=4;
	}

	m_vboPos->bind();
	glBufferData(GL_ARRAY_BUFFER, m_nb * sizeof(Geom::Vec3f), &(points[0]), GL_STREAM_DRAW);
}

void Grid::updatePrecisionDrawing(unsigned int sub, unsigned int sub2)
{
319 320
	m_sub1 = sub;
	m_sub2 = sub2;
321 322 323 324
	changeTopo(sub);
}


325
unsigned int Grid::pick(const Geom::Vec3f& P, const Geom::Vec3f& V, Geom::Vec3f& I, float epsilon)
326
{
327
	if (fabs(V[2])>=0.0000001f)
328 329
	{
		float a = -1.0f*P[2]/V[2];
330
		I = Geom::Vec3f(P+a*V);	// intersection with plane z=0
331

332
		if ( (fabs(I[0])<=1.0f) && (fabs(I[1])<=1.0f) )
333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351
			return 1;
	}

	return 0;
}






Sphere::Sphere(unsigned int par, unsigned int mer)
{
	changeTopo(par,mer);
}


void Sphere::changeTopo(unsigned int parp, unsigned int mer)
{
352 353 354 355
	if (parp<2)
		parp=2;
	if (mer<2)
		mer=2;
356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376
	// to obtain right number of slice
	unsigned int par = parp-1;

	unsigned int merfactor=1;
	unsigned int parfactor=1;

	if (mer<8)
		merfactor = 8;
	else if (mer<16)
		merfactor = 4;
	else if (mer<32)
		merfactor = 2;

	if (par<8)
		parfactor = 8;
	else if (par<16)
		parfactor = 4;
	else if (par<32)
		parfactor = 2;

	unsigned int merAll = merfactor * mer;
377
	unsigned int parAll = parfactor* (par+1);
378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413

	std::vector<Geom::Vec3f> points;
	points.reserve(parAll*merAll+2);

	for (unsigned int i=0; i<parAll; ++i)
	{
		float beta = float(i+1)*M_PI/float(parAll+1);
		float z = -cos(beta);

		float radius = sin(beta);

		for (unsigned int j=0; j<merAll; ++j)
		{
			float alpha = 2.0f*float(j)*M_PI/float(merAll);
			float x = radius*cos(alpha);
			float y = radius*sin(alpha);
			points.push_back(Geom::Vec3f(x,y,z));
		}
	}
	//poles
	unsigned int north = points.size();
	points.push_back(Geom::Vec3f(0.0f,0.0f,-1.0f));
	unsigned int south = points.size();
	points.push_back(Geom::Vec3f(0.0f,0.0f,1.0f));

	m_vboPos->bind();
	glBufferData(GL_ARRAY_BUFFER, points.size() * sizeof(Geom::Vec3f), &(points[0]), GL_STREAM_DRAW);


	// indices
	std::vector<unsigned int> tableIndices;
	tableIndices.reserve(2*(mer*parAll + par*merAll + 8));


	for (unsigned int i=0; i<par; ++i)
	{
414
		unsigned int k = i*parfactor*merAll + parfactor*merAll;
415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444
		for (unsigned int j=0; j<merAll; ++j)
		{
			tableIndices.push_back(k+j);
			tableIndices.push_back(k+(j+1)%merAll);
		}
	}


	for (unsigned int i=0; i<mer; ++i)
	{
		tableIndices.push_back(north);
		unsigned int k=i*merfactor;
		tableIndices.push_back(k);
		for (unsigned int j=1; j<parAll; ++j)
		{
			tableIndices.push_back(k);
			k += merAll;
			tableIndices.push_back(k);
		}
		tableIndices.push_back(k);
		tableIndices.push_back(south);
	}

	m_nb=tableIndices.size();
	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_ind);
	glBufferData(GL_ELEMENT_ARRAY_BUFFER, m_nb*sizeof(GLuint), &(tableIndices[0]), GL_STREAM_DRAW);
}

void Sphere::updatePrecisionDrawing(unsigned int sub, unsigned int sub2)
{
445 446 447
	m_sub1 = sub;
	m_sub2 = sub2;

448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464
	if (sub2)
		changeTopo(sub,sub2);
	else
		changeTopo(sub,sub);
}



void Sphere::draw()
{
	m_shader->enableVertexAttribs();
	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_ind);
	glDrawElements(GL_LINES, m_nb, GL_UNSIGNED_INT, 0);
	m_shader->disableVertexAttribs();
}


465
unsigned int Sphere::pick(const Geom::Vec3f& P, const Geom::Vec3f& V, Geom::Vec3f& I, float epsilon)
466 467 468
{
	float dist = Geom::squaredDistanceLine2Point<Geom::Vec3f>(P,V,V*V, Geom::Vec3f(0.0f,0.0f,0.0f));

469 470
	if (dist > 1.0f)
		return 0;
471

472 473

	I=P;
474
	I.normalize();			// grossiere approximation TODO ameliorer approxim ?
475 476

	return 1;
477 478 479 480 481 482 483 484 485 486 487 488 489 490
}





Cone::Cone(unsigned int par, unsigned int mer)
{
	changeTopo(par,mer);
}


void Cone::changeTopo(unsigned int par, unsigned int mer)
{
491 492 493 494 495
	if (par<2)
		par=2;
	if (mer<2)
		mer=2;

496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561
	unsigned int merfactor=1;

	if (mer<8)
		merfactor = 8;
	else if (mer<16)
		merfactor = 4;
	else if (mer<32)
		merfactor = 2;

	unsigned int merAll = merfactor * mer;

	std::vector<Geom::Vec3f> points;
	points.reserve(par*merAll+2);

	for (unsigned int i=0; i<par; ++i)
	{
		float radius = 1.0f / float(par) * float(i+1);
		float z = 1.0f - 2.0f*radius;

		for (unsigned int j=0; j<merAll; ++j)
		{
			float alpha = 2.0f*float(j)*M_PI/float(merAll);
			float x = radius*cos(alpha);
			float y = radius*sin(alpha);
			points.push_back(Geom::Vec3f(x,y,z));
		}
	}
	//poles
	points.push_back(Geom::Vec3f(0.0f,0.0f,1.0f));
	points.push_back(Geom::Vec3f(0.0f,0.0f,-1.0f));

	m_vboPos->bind();
	glBufferData(GL_ARRAY_BUFFER, points.size() * sizeof(Geom::Vec3f), &(points[0]), GL_STREAM_DRAW);

	// indices
	std::vector<unsigned int> tableIndices;
	tableIndices.reserve(4*par*mer+4*mer);


	for (unsigned int i=0; i<par; ++i)
	{
		unsigned int k = i*merAll;
		for (unsigned int j=0; j<merAll; ++j)
		{
			tableIndices.push_back(k+j);
			tableIndices.push_back(k+(j+1)%merAll);
		}
	}

	for (unsigned int j=0; j<mer; ++j)
	{
		tableIndices.push_back(par*merAll);
		tableIndices.push_back(j*merfactor + (par-1)*merAll);
		tableIndices.push_back(j*merfactor + (par-1)*merAll);
		tableIndices.push_back(par*merAll+1);

	}


	m_nb=tableIndices.size();
	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_ind);
	glBufferData(GL_ELEMENT_ARRAY_BUFFER, m_nb*sizeof(GLuint), &(tableIndices[0]), GL_STREAM_DRAW);
}

void Cone::updatePrecisionDrawing(unsigned int sub, unsigned int sub2)
{
562 563 564
	m_sub1 = sub;
	m_sub2 = sub2;

565 566 567 568 569 570 571 572 573 574 575 576
	if (sub2)
		changeTopo(sub,sub2);
	else
		changeTopo(sub,sub);
}







577
unsigned int Cone::pick(const Geom::Vec3f& P, const Geom::Vec3f& V, Geom::Vec3f& I, float epsilon)
578 579 580 581 582 583 584 585 586
{
	Geom::Vec3f Z,Q;
	if (Geom::lineLineClosestPoints<Geom::Vec3f>(P, V, Geom::Vec3f(0.0f,0.0f,0.0f), Geom::Vec3f(0.0f,0.0f,1.0f), Q, Z))
	{
		if ((Q[2]>=-1.0f)&&(Q[2]<=1.0f))
		{
			float dist = Q[0]*Q[0] + Q[1]*Q[1];
			float cdist = (1.0f - Q[2])/2.0f;
			if (dist <= cdist*cdist) // squared !!
587 588
			{
				I = Q; 					// WARNING VERY BAD APPROXIMATON : TODO better approxim.
589
				return 1;
590 591
			}

592 593 594 595
		}
		// else check inter with base
		// Z=-1
		float a = (-1.0f - P[2]) / V[2];
596 597 598 599 600
		I = Geom::Vec3f(P+a*V);
		float dist = I[0]*I[0] + I[1]*I[1];
		if (dist > 1.0f)
			return 0;
		return 1;
601 602 603 604
	}

	// ray in Z direction
	float dist = P[0]*P[0] + P[1]*P[1];
605 606 607 608 609
	if (dist > 1.0f)
		return 0;
	I=P;
	I[2]=-1.0f;
	return 1;
610 611 612 613 614 615 616 617 618 619 620 621 622
}




Cylinder::Cylinder(unsigned int par, unsigned int mer)
{
	changeTopo(par,mer);
}


void Cylinder::changeTopo(unsigned int parp, unsigned int mer)
{
623 624 625 626 627
	if (parp<2)
		parp=2;
	if (mer<2)
		mer=2;

628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698
	// to obtain right number of slice (with almost same code as sphere)
	unsigned int par = parp+1;

	unsigned int merfactor=1;

	if (mer<8)
		merfactor = 8;
	else if (mer<16)
		merfactor = 4;
	else if (mer<32)
		merfactor = 2;

	unsigned int merAll = merfactor * mer;

	std::vector<Geom::Vec3f> points;
	points.reserve(par*merAll+2);

	for (unsigned int i=0; i<par; ++i)
	{
		float z = -1.0f + 2.0f/float(par-1) * float(i);

		for (unsigned int j=0; j<merAll; ++j)
		{
			float alpha = 2.0f*float(j)*M_PI/float(merAll);
			float x = cos(alpha);
			float y = sin(alpha);
			points.push_back(Geom::Vec3f(x,y,z));
		}
	}
	//poles
	points.push_back(Geom::Vec3f(0.0f,0.0f,1.0f));
	points.push_back(Geom::Vec3f(0.0f,0.0f,-1.0f));

	m_vboPos->bind();
	glBufferData(GL_ARRAY_BUFFER, points.size() * sizeof(Geom::Vec3f), &(points[0]), GL_STREAM_DRAW);

	// indices
	std::vector<unsigned int> tableIndices;
	tableIndices.reserve(4*par*mer+4*mer);


	for (unsigned int i=0; i<par; ++i)
	{
		unsigned int k = i*merAll;
		for (unsigned int j=0; j<merAll; ++j)
		{
			tableIndices.push_back(k+j);
			tableIndices.push_back(k+(j+1)%merAll);
		}
	}

	for (unsigned int j=0; j<mer; ++j)
	{
		tableIndices.push_back(par*merAll);
		tableIndices.push_back(j*merfactor + (par-1)*merAll);
		tableIndices.push_back(j*merfactor + (par-1)*merAll);
		tableIndices.push_back(j*merfactor );
		tableIndices.push_back(j*merfactor );
		tableIndices.push_back(par*merAll+1);

	}


	m_nb=tableIndices.size();
	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_ind);
	glBufferData(GL_ELEMENT_ARRAY_BUFFER, m_nb*sizeof(GLuint), &(tableIndices[0]), GL_STREAM_DRAW);

}

void Cylinder::updatePrecisionDrawing(unsigned int sub, unsigned int sub2)
{
699 700 701
	m_sub1 = sub;
	m_sub2 = sub2;

702 703 704 705 706 707 708 709
	if (sub2)
		changeTopo(sub,sub2);
	else
		changeTopo(sub,sub);
}



710
unsigned int Cylinder::pick(const Geom::Vec3f& P, const Geom::Vec3f& V,  Geom::Vec3f& I, float epsilon)
711 712 713 714 715 716 717 718
{
	Geom::Vec3f Z,Q;
	if (Geom::lineLineClosestPoints<Geom::Vec3f>(P, V, Geom::Vec3f(0.0f,0.0f,0.0f), Geom::Vec3f(0.0f,0.0f,1.0f), Q, Z))
	{
		if ((Q[2]>=-1.0f)&&(Q[2]<=1.0f))
		{
			float dist = Q[0]*Q[0] + Q[1]*Q[1];
			if (dist < 1.0f)
719 720
			{
				I = Q; 					// WARNING VERY BAD APPROXIMATON : TODO better approxim.
721
				return 1;
722 723
			}

724 725 726 727
		}
		// else check inter with bases
		// Z=1
		float a = (1.0f - P[2]) / V[2];
728 729
		I = Geom::Vec3f(P+a*V);
		float dist = I[0]*I[0] + I[1]*I[1];
730 731 732 733
		if (dist < 1.0f)
			return 1;
		// Z=-1
		a = (-1.0f - P[2]) / V[2];
734 735
		I = Geom::Vec3f(P+a*V);
		dist = I[0]*I[0] + I[1]*I[1];
736 737 738 739 740 741 742 743
		if (dist < 1.0f)
			return 1;
		//else no inter
		return 0;
	}

	// ray in Z direction
	float dist = P[0]*P[0] + P[1]*P[1];
744 745 746 747 748 749 750 751
	if (dist > 1.0f)
		return 0;
	I=P;
	if (V[2]<0.0f)
		I[2]=-1.0f;
	else
		I[2]=1.0f;
	return 1;
752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836
}







Cube::Cube(unsigned int sub)
{
	changeTopo(sub);
}

void Cube::changeTopo(unsigned int sub)
{
	// subdiv = number of internal points on each edge
	unsigned int subdiv = sub-1;
	std::vector<Geom::Vec3f> points;
	points.reserve(8+12*subdiv);

	points.push_back(Geom::Vec3f(-1.0f,-1.0f,-1.0f));
	points.push_back(Geom::Vec3f( 1.0f,-1.0f,-1.0f));
	points.push_back(Geom::Vec3f( 1.0f, 1.0f,-1.0f));
	points.push_back(Geom::Vec3f(-1.0f, 1.0f,-1.0f));
	points.push_back(Geom::Vec3f(-1.0f,-1.0f, 1.0f));
	points.push_back(Geom::Vec3f( 1.0f,-1.0f, 1.0f));
	points.push_back(Geom::Vec3f( 1.0f, 1.0f, 1.0f));
	points.push_back(Geom::Vec3f(-1.0f, 1.0f, 1.0f));

	for (unsigned int i=0; i< subdiv; ++i)
	{
		float v = -1.0f + float(2*i+2)/float(subdiv+1);

		points.push_back(Geom::Vec3f(-1.0f,-1.0f, v));
		points.push_back(Geom::Vec3f(-1.0f, 1.0f, v));
		points.push_back(Geom::Vec3f( 1.0f, 1.0f, v));
		points.push_back(Geom::Vec3f( 1.0f,-1.0f, v));

		points.push_back(Geom::Vec3f(-1.0f, v,-1.0f));
		points.push_back(Geom::Vec3f(-1.0f, v, 1.0f));
		points.push_back(Geom::Vec3f( 1.0f, v, 1.0f));
		points.push_back(Geom::Vec3f( 1.0f, v,-1.0f));

		points.push_back(Geom::Vec3f(v,-1.0f,-1.0f));
		points.push_back(Geom::Vec3f(v,-1.0f, 1.0f));
		points.push_back(Geom::Vec3f(v, 1.0f, 1.0f));
		points.push_back(Geom::Vec3f(v, 1.0f,-1.0f));
	}

	m_vboPos->bind();
	glBufferData(GL_ARRAY_BUFFER, points.size() * sizeof(Geom::Vec3f), &(points[0]), GL_STREAM_DRAW);

	// indices
	std::vector<unsigned int> tableIndices;
	tableIndices.reserve(24+24*subdiv);

	for (unsigned int i=0; i<4; ++i)
	{
		tableIndices.push_back(i);
		tableIndices.push_back((i+1)%4);
		tableIndices.push_back(4 + i);
		tableIndices.push_back(4 + (i+1)%4);
		tableIndices.push_back(i);
		tableIndices.push_back(4 + i);
	}
	for (unsigned int i=0; i< subdiv; ++i)
	{
		for (unsigned int j=0; j< 3; ++j) // direction X Y Z (or edge)
		{
			for (unsigned int k=0; k< 4; ++k)	// turn around cube
			{
				tableIndices.push_back(8 + i*12 + (j*4) + k);
				tableIndices.push_back(8 + i*12 + (j*4) + (k+1)%4);
			}
		}
	}

	m_nb=tableIndices.size();
	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_ind);
	glBufferData(GL_ELEMENT_ARRAY_BUFFER, m_nb*sizeof(GLuint), &(tableIndices[0]), GL_STREAM_DRAW);
}


void Cube::updatePrecisionDrawing(unsigned int sub, unsigned int sub2)
{
837 838 839
	m_sub1 = sub;
	m_sub2 = sub2;

840 841 842 843 844 845 846 847 848 849 850 851 852 853
	changeTopo(sub);
}



void Cube::draw()
{
	m_shader->enableVertexAttribs();
	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_ind);
	glDrawElements(GL_LINES, m_nb, GL_UNSIGNED_INT, 0);
	m_shader->disableVertexAttribs();
}


854
unsigned int Cube::pick(const Geom::Vec3f& P, const Geom::Vec3f& V, Geom::Vec3f& I, float epsilon)
855 856 857 858 859 860 861
{

//	// firs quick picking with bounding sphere
	float dist2 = Geom::squaredDistanceLine2Point<Geom::Vec3f>(P,V,V*V, Geom::Vec3f(0.0f,0.0f,0.0f));
	if (dist2 > 3.0f)
		return 0;

862 863 864 865 866
	I=P;
	I.normalize();			// grossiere approximation TODO amelioerer approxim ?

	std::vector<Geom::Vec3f> intersections;

867 868
	for (unsigned int i=0; i<3; ++i)
	{
869
		if (fabs(V[i])>=0.0000001f)
870 871 872
		{
			float a = (-1.0f-P[i])/V[i];
			Geom::Vec3f Q = Geom::Vec3f(P+a*V);	// intersection with plane z=0
873
			if ( (fabs(Q[(i+1)%3])<=1.0f) && (fabs(Q[(i+2)%3])<=1.0f) )
874 875 876
				return 1;
			a = (1.0f-P[i])/V[i];
			Q = Geom::Vec3f(P+a*V);	// intersection with plane z=0
877
			if ( (fabs(Q[(i+1)%3])<=1.0f) && (fabs(Q[(i+2)%3])<=1.0f) )
878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948
				return 1;
		}
	}

	return 0;
}




IcoSphere::IcoSphere(unsigned int sub):
		m_sub(0xffffffff)
{
	changeTopo(sub);
}

unsigned int IcoSphere::insertPoint(std::vector<Geom::Vec3f>& points, const Geom::Vec3f& P)
{
	for (unsigned int i=0; i< points.size();++i)
		if (((P-points[i]).norm2())< 0.00000001f)
			return i;
	points.push_back(P);
	return points.size()-1;
}

void IcoSphere::subdivide(std::vector<unsigned int>& triangles, std::vector<Geom::Vec3f>& points)
{
	std::vector<unsigned int> newTriangles;
	newTriangles.reserve(triangles.size()*4);

	unsigned int nbtris = triangles.size()/3;

	for(unsigned int t=0; t<nbtris;++t)
	{
		const Geom::Vec3f& Pa =points[triangles[3*t]];
		const Geom::Vec3f& Pb =points[triangles[3*t+1]];
		const Geom::Vec3f& Pc =points[triangles[3*t+2]];

		Geom::Vec3f Pab =(Pa+Pb)/2.0f;
		Pab.normalize();
		Geom::Vec3f Pac =(Pa+Pc)/2.0f;
		Pac.normalize();
		Geom::Vec3f Pbc =(Pb+Pc)/2.0f;
		Pbc.normalize();

		unsigned int iAB = insertPoint(points,Pab);
		unsigned int iAC = insertPoint(points,Pac);
		unsigned int iBC = insertPoint(points,Pbc);

		newTriangles.push_back(triangles[3*t]); //Pa
		newTriangles.push_back(iAB); //Pab
		newTriangles.push_back(iAC); //Pac

		newTriangles.push_back(triangles[3*t+1]); //Pb
		newTriangles.push_back(iBC); //Pbc
		newTriangles.push_back(iAB); //Pab

		newTriangles.push_back(triangles[3*t+2]); //Pc
		newTriangles.push_back(iAC); //Pac
		newTriangles.push_back(iBC); //Pbc

		newTriangles.push_back(iAB); //Pab
		newTriangles.push_back(iBC); //Pbc
		newTriangles.push_back(iAC); //Pac
	}

	triangles.swap(newTriangles);
}

void IcoSphere::changeTopo(unsigned int sub)
{
949 950
	if (sub<2)
		sub=2;
thery's avatar
thery committed
951
	int subd = int(log(0.5*sub)/log(2.0))-1;
952 953 954 955 956 957 958 959 960 961 962 963 964
	if (subd<0)
		subd=0;

	changeTopoSubdivision(subd);
}

void IcoSphere::changeTopoSubdivision(unsigned int sub)
{
	if (m_sub == sub)
		return;

	m_sub = sub;

thery's avatar
thery committed
965
	unsigned int subEdge = (unsigned int)(powf(2.0f,4.0f-sub));
966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104

	std::vector<Geom::Vec3f> points;
	points.reserve(10000);

	unsigned int uitriangles[60]={0, 11, 5, 0, 5, 1, 0, 1, 7, 0, 7, 10, 0, 10, 11,
			1, 5, 9, 5, 11, 4, 11, 10, 2, 10, 7, 6, 7, 1, 8,
			3, 9, 4, 3, 4, 2, 3, 2, 6, 3, 6, 8, 3, 8, 9,
			4, 9, 5, 2, 4, 11, 6, 2, 10, 8, 6, 7, 9, 8, 1 };

	std::vector<unsigned int> triangles;
	triangles.reserve(60);
	for (unsigned int i=0; i<60; ++i)
		triangles.push_back(uitriangles[i]);


	// create 12 vertices of an icosahedron
	float t = (1.0f + sqrtf(5.0f)) / 2.0f;

	points.push_back(Geom::Vec3f(-1,  t,  0));
	points.push_back(Geom::Vec3f( 1,  t,  0));
	points.push_back(Geom::Vec3f(-1, -t,  0));
	points.push_back(Geom::Vec3f( 1, -t,  0));
	points.push_back(Geom::Vec3f( 0, -1,  t));
	points.push_back(Geom::Vec3f( 0,  1,  t));
	points.push_back(Geom::Vec3f( 0, -1, -t));
	points.push_back(Geom::Vec3f( 0,  1, -t));
	points.push_back(Geom::Vec3f( t,  0, -1));
	points.push_back(Geom::Vec3f( t,  0,  1));
	points.push_back(Geom::Vec3f(-t,  0, -1));
	points.push_back(Geom::Vec3f(-t,  0,  1));

	for (std::vector<Geom::Vec3f>::iterator pt=points.begin(); pt!=points.end(); ++pt)
		pt->normalize();

	// subdivide
	for (unsigned int i=0; i<sub; ++i)
		subdivide(triangles, points);


	// add some vertices on edges for nice round edges
	unsigned int idxNewPoints=points.size();

	for (unsigned int i=0; i<triangles.size()/3; ++i)
	{
		unsigned int a = triangles[3*i];
		unsigned int b = triangles[3*i+1];
		unsigned int c = triangles[3*i+2];

		if (a < b)
		{
			for(unsigned int i=0; i < subEdge; ++i)
			{
				float x = float(i+1)/float(subEdge+1);
				Geom::Vec3f P(x*points[b] + (1.0f-x)*points[a]);
				P.normalize();
				points.push_back(P);
			}
		}
		if (b < c)
		{
			for(unsigned int i=0; i < subEdge; ++i)
			{
				float x = float(i+1)/float(subEdge+1);
				Geom::Vec3f P(x*points[c] + (1.0f-x)*points[b]);
				P.normalize();
				points.push_back(P);
			}

		}
		if (c < a)
		{
			for(unsigned int i=0; i < subEdge; ++i)
			{
				float x = float(i+1)/float(subEdge+1);
				Geom::Vec3f P(x*points[a] + (1.0f-x)*points[c]);
				P.normalize();
				points.push_back(P);
			}
		}
	}

	// send buffer
	m_vboPos->bind();
	glBufferData(GL_ARRAY_BUFFER, points.size() * sizeof(Geom::Vec3f), &(points[0]), GL_STREAM_DRAW);

	// indices
	std::vector<unsigned int> tableIndices;
	tableIndices.reserve(triangles.size()/2 + 1000);

	unsigned int k=0;
	for (unsigned int i=0; i<triangles.size()/3; ++i)
	{
		unsigned int a = triangles[3*i];
		unsigned int b = triangles[3*i+1];
		unsigned int c = triangles[3*i+2];

		if (a < b)
		{
			tableIndices.push_back(a);
			for(unsigned int j=0; j < subEdge; ++j)
			{
				tableIndices.push_back(idxNewPoints+subEdge*k+j);
				tableIndices.push_back(idxNewPoints+subEdge*k+j);
			}
			tableIndices.push_back(b);
			k++;
		}
		if (b < c)
		{
			tableIndices.push_back(b);
			for(unsigned int j=0; j < subEdge; ++j)
			{
				tableIndices.push_back(idxNewPoints+subEdge*k+j);
				tableIndices.push_back(idxNewPoints+subEdge*k+j);
			}
			tableIndices.push_back(c);
			k++;
		}
		if (c < a)
		{
			tableIndices.push_back(c);
			for(unsigned int j=0; j < subEdge; ++j)
			{
				tableIndices.push_back(idxNewPoints+subEdge*k+j);
				tableIndices.push_back(idxNewPoints+subEdge*k+j);
			}
			tableIndices.push_back(a);
			k++;
		}
	}

	m_nb=tableIndices.size();
	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_ind);
	glBufferData(GL_ELEMENT_ARRAY_BUFFER, m_nb*sizeof(GLuint), &(tableIndices[0]), GL_STREAM_DRAW);
}


void IcoSphere::updatePrecisionDrawing(unsigned int sub, unsigned int sub2)
{
1105 1106
	m_sub1 = sub;
	m_sub2 = sub2;
1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121
	changeTopo(sub);
}



}
}