OpenGL项目：绘制简单场景

计算机图形学报告（项目一）专业：计算机科学与技术姓名：学号：班级：目录TOC\o"1-3"\h\z1．引言 11.1编写目的 11.2项目背景 12．开发结果 22.1开发环境 22.2主要功能及性能 22.3场景介绍 22.4操作介绍 22.5灯光介绍 23．总结 34．参考文献 35．代码 31．引言1.1编写目的利用OpenGL绘制一个简单的场景–包含球、正方形、网格数据–交互操作：平移、缩放、旋转–可以使用不同的灯光1.2项目背景openGL编程在计算机图形学中具有非常重要的作用，是实现计算机图形的一个重要工 具，通过openGL编程，我们能更好的学习计算机图形学，同时也能提高我们自己的实际动手能力。2．开发结果2.1开发环境Windows7旗舰版Vs20122.2主要功能及性能利用OpenGL绘制一个简单的场景–包含球、正方形、网格数据–交互操作：平移、缩放、旋转–可以使用不同的灯光2.3场景介绍绘制一个简单的场景,包含球、正方形、网格数据。如图：2.4操作介绍利用上下左右方向键进行上下左右移动，如图：利用home,end,pgup,insertj进行上下左右的旋转，如图：2.5灯光介绍包括三中灯光：环境光，漫射光，平面光利用鼠标右键进行灯光选择：漫射光如图：总结参考文献1、OpenGL超级宝典2、博客：vs2012中OpenGL配置3、计算机图像学基础5．代码//DiffuseLight.cpp//OpenGLSuperBible//Demonstratessimplediffuselighting//ProgrambyRichardS.WrightJr.#include<GLTools.h> //OpenGLtoolkit#include<GLMatrixStack.h>#include<GLFrame.h>#include<GLFrustum.h>#include<GLGeometryTransform.h>#include<StopWatch.h>#include<math.h>#ifdef__APPLE__#include<glut/glut.h>#else#defineFREEGLUT_STATIC#include<GL/glut.h>#endifGLFrameviewFrame;GLFrustumviewFrustum;GLTriangleBatchsphereBatch;//GLBatchsphereBatch;GLMatrixStackmodelViewMatrix;GLMatrixStackprojectionMatrix;GLGeometryTransformtransformPipeline;GLShaderManagershaderManager;GLuint ADSLightShader; GLint locAmbient; GLintlocDiffuse; GLintlocSpecular; GLint locLight; GLint locMVP; GLint locMV; GLint locNM; GLintlightOnOff=0;//pointsstaticconstfloatvertex_list[][3]={-0.5f,-1.5f,-0.5f,0.5f,-1.5f,-0.5f,0.5f,-0.5f,-0.5f,-0.5f,-0.5f,-0.5f,-0.5f,-1.5f,0.5f,0.5f,-1.5f,0.5f,0.5f,-0.5f,0.5f,-0.5f,-0.5f,0.5f,};//pointsconnectstaticconstGLintindex_list[][4]={{0,1,2,3},{3,2,6,7},{4,5,6,7},{0,1,5,4},{1,5,6,2},{0,4,7,3}};//drawcubevoidDrawCube(void){inti,j; glColor3f(1.0,0.0,0.0); glBegin(GL_QUADS);for(i=0;i<6;++i){for(j=0;j<4;++j){glVertex3fv(vertex_list[index_list[i][j]]);}}glEnd();}voidSetupRC(void) { //Background glClearColor(0.0f,1.0f,0.0f,1.0f); glEnable(GL_DEPTH_TEST); glEnable(GL_CULL_FACE);shaderManager.InitializeStockShaders();//viewFrame.MoveForward(4.0f);//MakethespheregltMakeSphere(sphereBatch,0.5f,26,13); ADSLightShader=shaderManager.LoadShaderPairWithAttributes("ADSGouraud.vp","ADSGouraud.fp",2,GLT_ATTRIBUTE_VERTEX,"vVertex", GLT_ATTRIBUTE_NORMAL,"vNormal"); locAmbient=glGetUniformLocation(ADSLightShader,"ambientColor"); locDiffuse=glGetUniformLocation(ADSLightShader,"diffuseColor"); locSpecular=glGetUniformLocation(ADSLightShader,"specularColor"); locLight=glGetUniformLocation(ADSLightShader,"vLightPosition"); locMVP=glGetUniformLocation(ADSLightShader,"mvpMatrix"); locMV=glGetUniformLocation(ADSLightShader,"mvMatrix"); locNM=glGetUniformLocation(ADSLightShader,"normalMatrix"); }//CleanupvoidShutdownRC(void){}voidRenderScene(void) { staticCStopWatchrotTimer; glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); modelViewMatrix.PushMatrix(viewFrame); //modelViewMatrix.Rotate(rotTimer.GetElapsedSeconds()*10.0f,0.0f,1.0f,0.0f); GLfloatvEyeLight[]={-100.0f,100.0f,100.0f}; GLfloatvAmbientColor[]={0.1f,0.1f,0.1f,1.0f}; GLfloatvDiffuseColor[]={0.0f,0.0f,1.0f,1.0f}; GLfloatvSpecularColor[]={1.0f,1.0f,1.0f,1.0f}; glUseProgram(ADSLightShader); if(lightOnOff==1) glUniform4fv(locAmbient,1,vAmbientColor); if(lightOnOff==2) glUniform4fv(locDiffuse,1,vDiffuseColor); if(lightOnOff==3) glUniform4fv(locSpecular,1,vSpecularColor); glUniform3fv(locLight,1,vEyeLight); glUniformMatrix4fv(locMVP,1,GL_FALSE,transformPipeline.GetModelViewProjectionMatrix()); glUniformMatrix4fv(locMV,1,GL_FALSE,transformPipeline.GetModelViewMatrix()); glUniformMatrix3fv(locNM,1,GL_FALSE,transformPipeline.GetNormalMatrix()); sphereBatch.Draw(); glColor3f(1.0,1.0,0.0); glRectf(-1.0,-1.0,1.0,1.0); GLfloatj=-3.0; for(inti=0;i<=30;i++) { glBegin(GL_LINES); glVertex2f(j,-3.0f); glVertex2f(j,3.0f); glEnd(); glBegin(GL_LINES); glVertex2f(-3.0f,j); glVertex2f(3.0f,j); glEnd(); j=j+0.2; } DrawCube();modelViewMatrix.PopMatrix();glutSwapBuffers(); glutPostRedisplay(); }voidChangeSize(intw,inth) { //Preventadividebyzero if(h==0) h=1; //SetViewporttowindowdimensionsglViewport(0,0,w,h);viewFrustum.SetPerspective(35.0f,float(w)/float(h),1.0f,100.0f);projectionMatrix.LoadMatrix(viewFrustum.GetProjectionMatrix());transformPipeline.SetMatrixStacks(modelViewMatrix,projectionMatrix); }voidSpecialKeys(intkey,intx,inty){ GLfloatstepSize=0.1f; GLfloatinitx=0.0; GLfloatinity=0.0; if(key==GLUT_KEY_UP) inity+=stepSize; if(key==GLUT_KEY_DOWN) inity-=stepSize; if(key==GLUT_KEY_LEFT) initx-=stepSize; if(key==GLUT_KEY_RIGHT) initx+=stepSize; viewFrame.TranslateWorld(initx,inity,0); if(key==GLUT_KEY_HOME) viewFrame.RotateWorld(m3dDegToRad(-5.0),1.0f,0.0f,0.0f); if(key==GLUT_KEY_END) viewFrame.RotateWorld(m3dDegToRad(5.0),1.0f,0.0f,0.0f); if(key==GLUT_KEY_INSERT) viewFrame.RotateWorld(m3dDegToRad(-5.0),0.0f,1.0f,0.0f); if(key==GLUT_KEY_PAGE_UP) viewFrame.RotateWorld(m3dDegToRad(5.0),0.0f,1.0f,0.0f); if(key==GLUT_KEY_F1) viewFrame.MoveForward(1.0f); if(key==GLUT_KEY_F2) viewFrame.MoveForward(-1.0f); glutPostRedisplay(); }voidright_menu(intid){switch(id){ case0:lightOnOff=0; break; case1:lightOnOff=1; break; case2:lightOnOff=2; break; case3:lightOnOff=3; break; default: break; } SetupRC(); glutPostRedisplay();}///////////////////////////////////////////////////////////////////////////////intmain(intargc,char*argv[]){ gltSetWorkingDirectory(argv[0]); glutInit(&argc,argv); glutInitDisplayMode(GLUT_DOUBLE|GLUT_RGBA|GLUT_DEPTH|GLUT_STENCIL); glutInitWindowSize(800,600); glutCreateWindow("ADSLighting,GouraudShading");glutReshapeFunc(ChangeSize);glutDisplayFunc(RenderScene); glutSpecialFunc(SpecialKeys); glutCreateMenu(right_menu);glutAddMenuEntry("off",0);glutAddMenuEntry("ambient",1);glutAddMenuEntry("diffuse",2); glutAddMenuEntry("specular",3);glutAttachMenu(GLUT_RIGHT_BUTTON); GLenumerr=glewInit(); if(GLEW_OK!=err){ fprintf(stderr,"GLEWError:%s\n",glewGetErrorString(err)); return1;} SetupRC(); glutMainLoop(); ShutdownRC(); return0;}.vp#version130//Incomingpervertex...positionandnormalinvec4vVertex;invec3vNormal;//Setperbatchuniformvec4ambientColor;uniformvec4diffuseColor; uniformvec4specularColor;uniformvec3 vLightPosition;uniformmat4 mvpMatrix;uniformmat4 mvMatrix;uniformmat3 normalMatrix;//Colortofragmentprogramsmoothoutvec4vVaryingColor;voidmain(void){//Getsurfacenormalineyecoordinatesvec3vEyeNormal=normalMatrix*vNormal;//Getvertexpositionineyecoordinatesvec4vPosition4=mvMatrix*vVertex;vec3vPosition3=vPosition4.xyz/vPosition4.w;//Ge