OpenGL项目绘制简单场景Word文档格式.docx
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利用鼠标右键进行灯光选择：
漫射光如图：
3．总结
4．参考文献
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
GLMatrixStack.h>
GLFrame.h>
GLFrustum.h>
GLGeometryTransform.h>
StopWatch.h>
math.h>
#ifdef__APPLE__
glut/glut.h>
#else
#defineFREEGLUT_STATIC
GL/glut.h>
#endif
GLFrameviewFrame;
GLFrustumviewFrustum;
GLTriangleBatchsphereBatch;
//GLBatchsphereBatch;
GLMatrixStackmodelViewMatrix;
GLMatrixStackprojectionMatrix;
GLGeometryTransformtransformPipeline;
GLShaderManagershaderManager;
GLuintADSLightShader;
GLintlocAmbient;
GLintlocDiffuse;
GLintlocSpecular;
GLintlocLight;
GLintlocMVP;
GLintlocMV;
GLintlocNM;
GLintlightOnOff=0;
//points
staticconstfloatvertex_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,
};
//pointsconnect
staticconstGLintindex_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}
//drawcube
voidDrawCube（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）;
//Makethesphere
gltMakeSphere（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"
//Cleanup
voidShutdownRC（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）;
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;
//SetViewporttowindowdimensions
glViewport（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）;
voidright_menu（intid）
switch（id）
case0:
lightOnOff=0;
break;
case1:
lightOnOff=1;
case2:
lightOnOff=2;
case3:
lightOnOff=3;
default:
SetupRC（）;
///////////////////////////////////////////////////////////////////////////////
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）;
ambient"
1）;
diffuse"
2）;
specular"
3）;
glutAttachMenu（GLUT_RIGHT_BUTTON）;
GLenumerr=glewInit（）;
if（GLEW_OK!
=err）{
fprintf（stderr,"
GLEWError:
%s\n"
glewGetErrorString（err））;
return1;
glutMainLoop（）;
ShutdownRC（）;
return0;
.vp
#version130
//Incomingpervertex...positionandnormal
invec4vVertex;
invec3vNormal;
//Setperbatch
uniformvec4ambientColor;
uniformvec4diffuseColor;
uniformvec4specularColor;
uniformvec3vLightPosition;
uniformmat4mvpMatrix;
uniformmat4mvMatrix;
uniformmat3normalMatrix;
//Colortofragmentprogram
smoothoutvec4vVaryingColor;
voidmain（void）
{
//Getsurfacenormalineyecoordinates
vec3vEyeNormal=normalMatrix*vNormal;
//Getvertexpositionineyecoordinates
vec4vPosition4=mvMatrix*vVertex;
vec3vPosition3=vPosition4.xyz/vPosition4.w;
//Getvectortolightsource
vec3vLightDir=normalize（vLightPosition-vPosition3）;
//Dotproductgivesusdiffuseintensity
floatdiff=max（0.0,dot（vEyeNormal,vLightDir））;
//Multiplyintensitybydiffusecolor,forcealphato1.0
vVaryingColor=diff*diffuseColor;
//Addinambientlight
vVaryingColor+=ambientColor;
//SpecularLight
vec3vReflection=normalize（reflect（-vLightDir,vEyeNormal））;
floatspec=max（0.0,dot（vEyeNormal,vReflection））;
if（diff!
=0）{
floatfSpec=pow（spec,128.0）;
vVaryingColor.rgb+=vec3（fSpec,fSpec,fSpec）;
//Don'
tforgettotransformthegeometry!
gl_Position=mvpMatrix*vVertex;
.fp
outvec4vFragColor;
smoothinvec4vVaryingColor;
voidmain（void）
vFragColor=vVaryingColor;
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