ajout rendu texte 3D (billboard)

changement glutwin (scale remplacer par translate Z)

Apps/Tuto/tuto5.cpp

@@ -44,6 +44,7 @@
 #include "Algo/Render/topo3_vboRender.h"
 
 #include "Topology/generic/cellmarker.h"
+#include "Utils/text3d.h"
 
 //#include "testMaps.h"
 
@@ -66,6 +67,10 @@ Dart dglobal;
 unsigned int idNorm;
 unsigned int idCol;
 
+
+
+
+
 class myGlutWin: public Utils::SimpleGlutWin
 {
 public:
@@ -83,8 +88,12 @@ public:
     Algo::Render::VBO::MapRender_VBO* m_render;
     Algo::Render::VBO::topo3_VBORenderMapD* m_render_topo;
 
+    Utils::Strings3D m_strings;
+
     void updateVBO();
 
+    void storeVerticesInfo();
+
  	myGlutWin(	int* argc, char **argv, int winX, int winY):SimpleGlutWin(argc,argv,winX,winY)
     {
  	   aff_help = false;
@@ -97,6 +106,22 @@ public:
  	void myKeyboard(unsigned char keycode, int x, int y);
 };
 
+void myGlutWin::storeVerticesInfo()
+{
+
+	CellMarker mv(myMap,VERTEX_CELL);
+	for (Dart d=myMap.begin(); d!=myMap.end(); myMap.next(d))
+	{
+		if (!mv.isMarked(d))
+		{
+			mv.mark(d);
+			std::stringstream ss;
+			ss << d << " : "<< position[d];
+			m_strings.addString(ss.str(),position[d]);
+		}
+	}
+}
+
 void myGlutWin::myRedraw(void)
 {
 	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
@@ -161,6 +186,15 @@ void myGlutWin::myRedraw(void)
 
 	}
 
+//	m_strings.predraw(Geom::Vec3f(0.0,1.0,1.0));
+//	m_strings.draw(0,Geom::Vec3f(0.5,0.5,0.5));
+//	m_strings.draw(1,Geom::Vec3f(-0.5,0.5,0.5));
+//	m_strings.draw(2,Geom::Vec3f(-0.5,-0.5,0.5));
+//	m_strings.postdraw();
+
+
+	m_strings.drawAll(Geom::Vec3f(0.0,1.0,1.0));
+
     //affichage de l'aide
     if (aff_help) {
             glColor3f(1.0f,1.0f,1.0f);
@@ -503,10 +537,11 @@ int main(int argc, char **argv)
     mgw.m_render = new Algo::Render::VBO::MapRender_VBO();
     mgw.m_render_topo = new Algo::Render::VBO::topo3_VBORenderMapD();
 
-
     mgw.updateVBO();
 
-
+    mgw.m_strings.init();
+    mgw.storeVerticesInfo();
+    mgw.m_strings.sendToVBO();
 
     mgw.mainLoop();
 

include/Utils/GLSLShader.h

@@ -39,6 +39,7 @@
 #include <map>
 #include <stdlib.h>
 #include <string>
+#include <vector>
 
 namespace CGoGN
 {
@@ -128,10 +129,7 @@ protected:
 	 */
 	bool create(GLint inputGeometryPrimitive=GL_TRIANGLES,GLint outputGeometryPrimitive=GL_TRIANGLES);
 
-	/*
-	 * search file in different path
-	 */
-	std::string findFile(const std::string filename);
+
 
 	/**
 	 * get log after compiling
@@ -141,6 +139,8 @@ protected:
 	char* getInfoLog( GLhandleARB obj );
 
 
+	static std::vector<std::string> m_pathes;
+
 public:
 	/**
 	 * constructor
@@ -153,6 +153,11 @@ public:
 	 */
 	virtual ~GLSLShader();
 
+	/*
+	 * search file in different path
+	 */
+	static std::string findFile(const std::string filename);
+
 
 	/**
 	 * test support of shader
@@ -210,6 +215,9 @@ public:
 	virtual void	unbind();
 
 
+	/**
+	 *
+	 */
 	GLuint 	getAttribIndex( char* attribName );
 
 	
@@ -225,20 +233,49 @@ public:
 	void bindAttrib(unsigned int att, const char* name) const;
 
 
+	/**
+	 * check shader validity width official GLSL syntax
+	 */
 	bool validateProgram();
 
+	/**
+	 * check program link status
+	 */
 	bool checkProgram();
 
+	/**
+	 * check shader compile status
+	 */
 	bool checkShader(int shaderType);
 
 public:
 
-
+	/**
+	 * set uniform shader float variable
+	 * @warning practical but less efficient that storing id (get with glGetUniformLocation) and use glUniform*fvARB
+	 * @param NB template size of variable to set
+	 * @param name name in shader
+	 * @param pointer on data to copy
+	 */
 	template<unsigned int NB>
 	void setuniformf( const char* name , float* val);
 
+	/**
+	 * set uniform shader int variable
+	 * @warning practical but less efficient that storing id (get with glGetUniformLocation) and use glUniform*ivARB
+	 * @param NB template size of variable to set
+	 * @param name name in shader
+	 * @param pointer on data to copy
+	 */
 	template<unsigned int NB>
 	void setuniformi( const char* name , int* val);
+
+	/**
+	 * add search path for file
+	 * @param path to add
+	 */
+	void addPathFileSeach(const std::string& path);
+
 };
 
 
@@ -289,13 +326,13 @@ void GLSLShader::setuniformi( const char* name , int* val)
 			glUniform1ivARB( uni, 1, val) ;
 			break;
 		case 2:
-			glUniform2ivARB( uni, 2, val) ;
+			glUniform2ivARB( uni, 1, val) ;
 			break;
 		case 3:
-			glUniform3ivARB( uni, 3, val) ;
+			glUniform3ivARB( uni, 1, val) ;
 			break;
 		case 4:
-			glUniform4ivARB( uni, 4, val) ;
+			glUniform4ivARB( uni, 1, val) ;
 			break;
 		}
 	}
@@ -305,6 +342,7 @@ void GLSLShader::setuniformi( const char* name , int* val)
 
 
 
+
 } //namespace Utils
 } //namespace CGoGN
 

include/Utils/text3d.h

+/*******************************************************************************
+* CGoGN: Combinatorial and Geometric modeling with Generic N-dimensional Maps  *
+* version 0.1                                                                  *
+* Copyright (C) 2009, 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: https://iggservis.u-strasbg.fr/CGoGN/                              *
+* Contact information: cgogn@unistra.fr                                        *
+*                                                                              *
+*******************************************************************************/
+
+#ifndef __TEXT_3D__
+#define __TEXT_3D__
+
+#include "Utils/GLSLShader.h"
+#include "Geometry/vector_gen.h"
+#include <IL/ilu.h>
+#include <IL/ilut.h>
+
+namespace CGoGN
+{
+namespace Utils
+{
+
+class Strings3D
+{
+protected:
+    static const unsigned int WIDTHFONT = 32;
+
+    static const unsigned int REALWIDTHFONT = 18;
+
+    static const unsigned int WIDTHTEXTURE = 512;
+
+    static const unsigned int HEIGHTTEXTURE = 256;
+
+    static const unsigned int CHARSPERLINE = WIDTHTEXTURE/WIDTHFONT;
+
+    static const unsigned int CHARSPERCOL = HEIGHTTEXTURE/WIDTHFONT;
+
+    ILuint m_imgName;
+
+	std::vector<std::string> m_strings;
+
+	unsigned int m_nbChars;
+
+    std::vector< std::pair<unsigned int, unsigned int> > m_strpos;
+
+    std::vector< Geom::Vec3f > m_strTranslate;
+
+    /**
+     * VBO (4f: x,y,u,v)
+     */
+    GLuint m_vbo1;
+
+    unsigned int sendOneStringToVBO(const std::string& str, float **buffer);
+
+
+    GLuint m_idTexture;
+
+    GLuint m_uniform_texture;
+
+    GLuint m_uniform_scale;
+
+    GLuint m_uniform_position;
+
+    GLuint m_uniform_color;
+
+    Utils::GLSLShader m_shader;
+
+
+public:
+	Strings3D();
+
+	~Strings3D();
+
+	/**
+	 * initialization step
+	 * OpenGL context must be opened
+	 * @param scale factor for font rendering
+	 */
+	void init(float scale=1.0f);
+
+	/**
+	 * add astring
+	 * @param string to add to pool of string
+	 * @return the id of string for rendering
+	 */
+	unsigned int addString(const std::string& str);
+
+	/**
+	 * add astring with its position
+	 * @param string to add to pool of string
+	 * @param pos the position of text
+	 * @return the id of string (future use:updating data)
+	 */
+	unsigned int addString(const std::string& str, const Geom::Vec3f& pos);
+
+	/**
+	 * once all string are stored, we must send it to the gracphic card
+	 */
+	void sendToVBO();
+
+	/**
+	 * draw on string
+	 * @param idSt the id of string
+	 * @param pos the position of text
+	 */
+	void draw(unsigned int idSt, const Geom::Vec3f& pos);
+
+	/**
+	* Draw all text stored with their position
+	* @param color the color of text
+	*/
+	void drawAll(const Geom::Vec3f& color);
+
+	/**
+	* call once before several draw(id,pos)
+	* @param color the color of text
+	*/
+	void predraw(const Geom::Vec3f& color);
+
+	/**
+	* call once after several draw(id,pos)
+	*/
+	void postdraw();
+
+	/**
+	 * set the scale for font rendering
+	 * @param scale
+	 */
+	void setScale(float scale);
+
+};
+}
+}
+#endif

lib/Shaders/text.frag

+varying vec2 tex_coord;
+uniform sampler2D FontTexture;
+uniform vec3 color;
+
+void main (void)
+{
+	float lum = texture2D(FontTexture, tex_coord).s;
+	gl_FragColor = vec4(color,0.0)*lum;
+}

lib/Shaders/text.vert

+uniform vec3 strPos;
+uniform float scale;
+
+varying vec2 tex_coord;
+
+void main()
+{	
+
+	vec4 pos = gl_ModelViewMatrix * vec4(strPos,1.0) + vec4(gl_Vertex[0]*scale,gl_Vertex[1]*scale,0.0,0.0);
+	tex_coord = vec2(gl_Vertex[2],gl_Vertex[3]);
+	gl_Position = gl_ProjectionMatrix * pos;
+}

src/Utils/GLSLShader.cpp

@@ -35,6 +35,9 @@ namespace CGoGN
 namespace Utils
 {
 
+
+std::vector<std::string> GLSLShader::m_pathes;
+
 GLSLShader::GLSLShader()
 {
 	m_vertex_shader_object = 0;
@@ -527,6 +530,20 @@ std::string GLSLShader::findFile(const std::string filename)
 	}
 	file.close();
 
+	for (std::vector<std::string>::const_iterator ipath = m_pathes.begin(); ipath != m_pathes.end(); ++ipath)
+	{
+		std::string st(*ipath);
+		st.append(filename);
+
+		std::ifstream file2;
+		file2.open(st.c_str(),std::ios::in);
+		if (!file2.fail())
+		{
+			file2.close();
+			return st;
+		}
+	}
+
 // LA MACRO SHADERPATH contient le chemin du repertoire qui contient les fichiers textes
 	std::string st(SHADERPATH);
 	st.append(filename);
@@ -684,6 +701,11 @@ void GLSLShader::bindAttrib(unsigned int att, const char* name) const
 }
 
 
+void GLSLShader::addPathFileSeach(const std::string& path)
+{
+	m_pathes.push_back(path);
+}
+
 
 
 } // namespace Utils

src/Utils/glutwin.cpp

@@ -69,7 +69,7 @@ SimpleGlutWin::SimpleGlutWin(int* argc, char **argv, int winX, int winY)
 	scalefactor = 1.0f;
 	trans_x=0.;
 	trans_y=0.;
-	trans_z=-50.0f;
+	trans_z=-200.0f;
 
 
 	std::cout << "Initialisation Glut" << std::endl;
@@ -160,14 +160,11 @@ void SimpleGlutWin::recalcModelView(void)
 	glPopMatrix();
 	glPushMatrix();
 
-	glTranslatef(trans_x,trans_y,trans_z+foc);
+	glTranslatef(trans_x,trans_y,trans_z);
 
 	build_rotmatrix(m, curquat);
 	glMultMatrixf(&m[0][0]);
 
-	float sc = getScale();
-	glScalef(sc,sc,sc);
-
 	newModel = 0;
 }
 
@@ -215,12 +212,13 @@ void SimpleGlutWin::motion(int x, int y)
 		{
 			if (scaling) 
 			{
-				scalefactor = scalefactor * (1.0f + (((float) (beginy - y)) / H));
+				trans_z -= 0.1f*(x - beginx);
+				trans_z -= 0.1f*(y - beginy);
 			}
 			else if (translating) 
 			{
-				trans_x += 0.01f*(x - beginx);
-				trans_y += 0.01f*(beginy - y);
+				trans_x += 0.05f*(x - beginx);
+				trans_y += 0.05f*(beginy - y);
 			}
 			beginx = x;
 			beginy = y;

src/Utils/glutwin_atb.cpp

@@ -65,7 +65,7 @@ GlutWin_ATB::GlutWin_ATB(int* argc, char **argv, int winX, int winY)
 	scalefactor = 1.0f ;
 	trans_x = 0.0f ;
 	trans_y = 0.0f ;
-	trans_z = -50.0f ;
+	trans_z = -200.0f ;
 
 	std::cout << "Initialisation Glut" << std::endl ;
 	glutInit(argc, argv) ;
@@ -155,14 +155,11 @@ void GlutWin_ATB::recalcModelView()
 	glPopMatrix() ;
 	glPushMatrix() ;
 
-	glTranslatef(trans_x, trans_y, trans_z+focal) ;
+	glTranslatef(trans_x, trans_y, trans_z) ;
 
 	build_rotmatrix(m, curquat) ;
 	glMultMatrixf(&m[0][0]) ;
 
-	float sc = getScale() ;
-	glScalef(sc, sc, sc) ;
-
 	newModel = 0 ;
 }
 
@@ -185,14 +182,15 @@ void GlutWin_ATB::motion(int x, int y)
 	}
 	else if(scaling)
 	{
-		scalefactor = scalefactor * (1.0f + (((float) (beginy - y)) / H)) ;
+		trans_z -= 0.1f*(x - beginx);
+		trans_z -= 0.1f*(y - beginy);
 		newModel = 1 ;
 		glutPostRedisplay() ;
 	}
 	else if(translating)
 	{
-		trans_x += 0.01f * (x - beginx) ;
-		trans_y += 0.01f * (beginy - y) ;
+		trans_x += 0.05f * (x - beginx) ;
+		trans_y += 0.05f * (beginy - y) ;
 		newModel = 1 ;
 		glutPostRedisplay() ;
 	}

src/Utils/text3d.cpp

+/*******************************************************************************
+* CGoGN: Combinatorial and Geometric modeling with Generic N-dimensional Maps  *
+* version 0.1                                                                  *
+* Copyright (C) 2009, 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: https://iggservis.u-strasbg.fr/CGoGN/                              *
+* Contact information: cgogn@unistra.fr                                        *
+*                                                                              *
+*******************************************************************************/
+
+#include "Utils/text3d.h"
+
+namespace CGoGN
+{
+namespace Utils
+{
+
+Strings3D::Strings3D():
+	m_nbChars(0)
+{ }
+
+void Strings3D::init(float scale)
+{
+	glGenBuffersARB(1, &m_vbo1);
+	m_shader.loadShaders("text.vert", "text.frag");
+	m_shader.bind();
+	m_uniform_position = glGetUniformLocationARB(m_shader.program_handler(),"strPos");
+	m_uniform_color = glGetUniformLocationARB(m_shader.program_handler(),"color");
+	m_uniform_scale = glGetUniformLocationARB(m_shader.program_handler(),"scale");
+	glUniform1f(m_uniform_scale, scale);
+	m_shader.unbind();
+
+	// load texture
+	std::string font_finename = Utils::GLSLShader::findFile("font_cgogn.png");
+	ilInit();
+	ilOriginFunc(IL_ORIGIN_UPPER_LEFT);
+	ilEnable(IL_ORIGIN_SET);
+
+	ilGenImages(1,&m_imgName);
+	ilBindImage(m_imgName);
+	ilLoadImage(font_finename.c_str());
+
+	glGenTextures( 1, &m_idTexture);
+	glBindTexture(GL_TEXTURE_2D, m_idTexture);
+	glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE, WIDTHTEXTURE, HEIGHTTEXTURE, 0, GL_LUMINANCE,  GL_UNSIGNED_BYTE, (GLvoid*)(ilGetData()));
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+	m_uniform_texture = glGetUniformLocationARB(m_shader.program_handler(),"FontTexture");
+}
+
+
+void Strings3D::setScale(float scale)
+{
+	m_shader.bind();
+	glUniform1f(m_uniform_scale, scale);
+	m_shader.unbind();
+}
+
+Strings3D::~Strings3D()
+{
+	ilDeleteImages(1,&m_imgName);
+	glDeleteBuffers(1, &m_vbo1);
+}
+
+unsigned int Strings3D::addString(const std::string& str)
+{
+	unsigned int id=m_strings.size();
+	m_strings.push_back(str);
+	m_nbChars += str.length();
+	return id;
+}
+
+unsigned int Strings3D::addString(const std::string& str, const Geom::Vec3f& pos)
+{
+	unsigned int id=m_strings.size();
+	m_strings.push_back(str);
+	m_nbChars += str.length();
+	m_strTranslate.push_back(pos);
+	return id;
+}
+
+unsigned int Strings3D::sendOneStringToVBO(const std::string& str, float **buffervbo)
+{
+	unsigned int nbc = str.length();
+
+	float x=0.0f;
+
+	float* buffer = *buffervbo;
+
+	for(unsigned int j=0; j< nbc;++j)
+	{
+		unsigned int ci = str[j]-32;
+		float u  = float(ci%CHARSPERLINE)/float(CHARSPERLINE);
+		float v  = float(ci/CHARSPERLINE)/float(CHARSPERCOL)+ 1.0f/HEIGHTTEXTURE;
+		float u2 = u + float(REALWIDTHFONT)/float(WIDTHTEXTURE);
+		float v2 = v + float(WIDTHFONT-1)/float(HEIGHTTEXTURE);
+
+		*buffer++ = x;
+		*buffer++ = 0;
+		*buffer++ = u;
+		*buffer++ = v2;
+
+		float xf = x+float(REALWIDTHFONT)/25.f;
+
+		*buffer++ = xf;
+		*buffer++ = 0;
+		*buffer++ = u2;
+		*buffer++ = v2;
+
+		*buffer++ = xf;
+		*buffer++ = float(WIDTHFONT)/25.f;
+		*buffer++ = u2;
+		*buffer++ = v;
+
+		*buffer++ = x;
+		*buffer++ = float(WIDTHFONT)/25.f;
+		*buffer++ = u;
+		*buffer++ = v;
+
+		x = xf; // + space ?
+	}
+
+	*buffervbo = buffer;
+
+	return 4*nbc;
+}
+
+void Strings3D::sendToVBO()
+{
+	// send coord / texcoord of strings
+
+	// alloc buffer
+	glBindBufferARB(GL_ARRAY_BUFFER, m_vbo1);
+	glBufferDataARB(GL_ARRAY_BUFFER, m_nbChars*16*sizeof(float), 0, GL_STREAM_DRAW);
+	float* buffer =  reinterpret_cast<float*>(glMapBufferARB(GL_ARRAY_BUFFER, GL_READ_WRITE));
+
+	// fill buffer