#include<stdio.h>
#include<stdlib.h>
#include<gl/glaux.h>
#include<GL/glut.h>
#include"../../wgGameLib03/dms/FileImage.h"
#include"../../wgGraphLib/GraphElemenfs.h"
GLint iWidth, iHeight, iGomponents.h;
GLenum eFormat;
GLfloat xRot,yRot;
GLfloat noLight[4]={0.0f,0.0f,0.0f,1.0f};
GLfloat ambientLight[4]={0.3f,0.3f,0.3f,0.2f};
GLfloat brightLight[4]={1.0f,1.0f,1.0f,0.3f};
static GLfloat lightPos[]={5.0f,5.0f,5.0f,1.0f};
void Init()
{
glClearColor(0.0f,0.0f,0.0f,1.0f);
glCullFace(GL_BACK);
glFrontFace(GL_CCW);
glEnable(GL_CULL_FACE);
glEnable(GL_DEPTH_TEST);
glEnable(GL_LIGHTING);
glLigntModelfv(GL_LIGHT_MODEL_AMBIENT,noLight);
glLightfv(GL_LIGHTO,GL_AMBIENT,ambientLight);
glLightfv(GL_LIGHTO,GL_DIFFUSE,diffuseLight);
glLightfv(GL_LIGHTO,GL_SPECULAR,brightLight);
glLightfv(GL_LIGHTO,GL_POSITION,lightPos);
glEnable(GL_COLOR_MATERIAL);
glColorMateriali(GL_FRONT,GL_AMBIENT_AND_DIFFUSE);
glMaterialfv(GL_FRONT,GL_SPECULAR,brightLight);
glMateriali(GL_FRONT,GL_SHININESS,30);
glPixelStorei(GL_UNPACK_ALIGHMENT,1);
dms::FileImage image("stone.jpg");
if(image.data())
{
glTexImage2D(GL_TEXTURE_2D,0,GL_RGBA,image.width(),image.height(),0,GL_RGBA,GL_UNSIGNED_BYTE,image.data());
//glTexImage2D(GL_TEXTURE_2D,0,iComponents,iWidth,iHeight,0,eFormat,GL_UNSIGNED_BYTE,pImage);
free(image.data());
}
float colorl[4]={1.0,0.1,0.1,1.0}；
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_CLAMP);
glTexEnvi(GL_TEXTURE_ENV,GL_TEXTURE_ENV_MODE,GL_BLEND);
glEnable(GL_TEXTURE_2D);
}
void display()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
float vertices[5][3]={{0.0f,0.8f,0.0f},
{-0.50f,0.0f,-0.50f},
{0.5f,0.0f,-0.5f},
{0.50f,0.0f,0.50f}};
float normal[3];
glPushMatrix();
glTranslatef(0.0f,-0.3f,-4.0f);
if(xRot>360.5f)
{
xRot=0.0f;
}
if(yRot>360.5f)
{
yRot=0.0f;
}
glBotatef(xROt,1.0f,0.0f,0.0f);
glRotatef(yRot,0.0f,1.0f,0.0f);
xRot+=0.5f;
yRot+=0.5f;
glBegin(GL_TRIANGLES);
glColor3f(1.0f,0.0f,0.0f);
glNormal3f(0.0f,-1.0f,0.0f);
glTexCoord2f(0.0f,1.0f); glVertex3fv(vertices[1]);
glTexCoord2f(1.0f,0.0f); glVertex3fv(vertices[2]);
glTexCoord2f(0.0f,1.0f); glVertex3fv(vertices[4]);
glTexCoord2f(1.0f,0.0f); glVertex3fv(vertices[4]);
glTexCoord2f(0.0f,0.0f); glVertex3fv(vertices[3]);
glTexCoord2f(0.0f,1.0f); glVertex3fv(vertices[1]);
glColor3f(0.0f,0.0f,1.0f);
wgGetNormal(vertices[1],vertices[3],vertices[0],normal);
glNormal3f(normal);
glTexCoord2f(0.0f,0.0f); glVertex3fv(vertices[1]);
glTexCoord2f(1.0f,0.0f); glVertex3fv(vertices[3]);
glTexCoord2f(0.5f,0.5f); glVertex3fv(vertices[0]);
glColor3f(0.0f,1.0f,1.0f);
wgGetNormal(vertices[0],vertices[4],vertices[2],normal);
glNormal3f(normal);
glTexCoord2f(0.5f,0.5f); glVertex3fv(vertices[0]);
glTexCoord2f(0.0f,0.0f); glVertex3fv(vertices[4]);
glTexCoord2f(1.0f,0.0f); glVertex3fv(vertices[2]);
glColor3f(1.0f,0.0f,1.0f);
wgGetNormal(vertices[0],vertices[2],vertices[1],normal);
glNormal3f(normal);
glTexCoord2f(0.5f,0.5f); glVertex3fv(vertices[0]);
glTexCoord2f(0.0f,0.0f); glVertex3fv(vertices[2]);
glTexCoord2f(1.0f,0.0f); glVertex3fv(vertices[1]);
glEnd();
glPopMatrix();
glutSwapBuffers();
}
voidReshape(GLsizei w,GLsizei h)
{
if(h==0)
h=1;
glViewport(0,0,w,h);
float fAspect=(GLfloat)w/(GLfloat)h;
glMatrixMade(GL_PROJECTION);
glLoadIdentity();
glutPostRedisplay();
}
void TimerFunc(int value)
{
glutPostRedisplay();
glutTimerFunc(60,TimerFunc,1);
}
int main(int args,char *argv[])
{
glutInit(&args,argv);
glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
glutInitWindowSize(512,512);
glutCreatWindow("example");
glutDisplayFunc(display);
glutReshapeFunc(Reshape);
Init();
glutTimerFunc(50,TimerFunc,1);
//tTexture
glutMainLoop();
return 0;
}
本文介绍OpenGL中剔除操作与多边形显示模式的设置方法。通过glCullFace函数可以控制多边形的正面或背面是否参与渲染，以减少不必要的计算。glPolygonMode函数则允许开发者选择多边形的显示方式，如点、线或填充。
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