Opengl___真实感技术1:光照

光照

设置glLightfv(灯光，属性，属性值)；

例如：
1.glLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
2.glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse);
3.glLightfv(GL_LIGHT0, GL_POSITION, position);

设置物体材质glMaterialfv(GL_FRONT, GL_AMBIENT, no_mat);

// 提示：在合适的地方修改或添加代码
#include <GL/glut.h>
#include<stdlib.h>
// 评测代码所用头文件-开始

using namespace std;
// 评测代码所用头文件-结束

void init(void)
{
    GLfloat position[] = { 0.0,3.0,2.0,0.0 };
    GLfloat ambient[] = { 0.0,0.0,0.0,1.0 };
    GLfloat diffuse[] = { 1.0,1.0,1.0,1.0 };
    GLfloat specular[] = { 1.0,1.0,1.0,1.0 };
    GLfloat lmodel_ambient[] = { 0.4,0.4,0.4,1.0 };
    GLfloat local_view[] = { 0.0 };

    glClearColor(0.0, 0.1, 0.1, 0.0);
    glShadeModel(GL_SMOOTH);

    glLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
    glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse);
    glLightfv(GL_LIGHT0, GL_POSITION, position);
    glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lmodel_ambient);
    glLightModelfv(GL_LIGHT_MODEL_LOCAL_VIEWER, local_view);

    glEnable(GL_LIGHTING);
    glEnable(GL_LIGHT0);
    glEnable(GL_DEPTH_TEST);

}

void display(void)
{
    GLfloat no_mat[] = { 0.0,0.0,0.0,1.0 };                     //没有光
    GLfloat mat_ambient[] = { 0.7,0.7,0.7,1.0 };                //环境光
    GLfloat mat_ambient_color[] = { 0.8, 0.8, 0.2, 1.0 };       //彩色环境光 
    GLfloat mat_diffuse[] = { 0.1,0.5,0.8,1.0 };                //漫反射
    GLfloat mat_specular[] = { 1.0,1.0,1.0,1.0 };               //镜面反射
    GLfloat no_shininess[] = { 0.0 };                         //没有镜面反射
    GLfloat low_shininess[] = { 5.0 };                          //低镜面反射
    GLfloat high_shininess[] = { 100.0 };                       //高镜面反射
    GLfloat mat_emission[] = { 0.3,0.2,0.2,0.0 };               //材料辐射光颜色 

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();
    glTranslatef(-3.0, 0.0, 0.0);
    // 请在此添加你的代码，左侧圆球只有漫反射
    /********** Begin ********/
    glMaterialfv(GL_FRONT, GL_AMBIENT, no_mat);
    glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuse);
    /********** End *********/
    glutSolidSphere(1.0, 50, 50);
    glPopMatrix();

    glPushMatrix();
    // 请在此添加你的代码，中间圆球有环境光和漫反射
    /********** Begin ********/

    glMaterialfv(GL_FRONT, GL_AMBIENT, mat_ambient);
    glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuse);

    /********** End *********/
    glutSolidSphere(1.0, 50, 50);
    glPopMatrix();

    glPushMatrix();
    glTranslatef(3.0, 0.0, 0.0);
    // 请在此添加你的代码，右侧圆球有彩色环境光和漫反射
    /********** Begin ********/

    glMaterialfv(GL_FRONT, GL_AMBIENT, mat_ambient_color);
    glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuse);

    /********** End *********/
    glutSolidSphere(1.0, 50, 50);
    glPopMatrix();

    glFlush();
    glutPostRedisplay();
}

void reshape(int w, int h)
{
    glViewport(0, 0, (GLsizei)w, (GLsizei)h);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluPerspective(60.0, (GLfloat)w / (GLfloat)h, 1.0, 20.0);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
    gluLookAt(0.0, 5.0, 5.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);
}





int main(int argc, char* argv[])
{
    GLubyte* pPixelData = (GLubyte*)malloc(800 * 600 * 3);//分配内存
    GLint viewport[4] = { 0 };
    glutInit(&argc, argv);
    glutInitWindowPosition(100, 100);
    glutInitWindowSize(800, 600);
    glutCreateWindow("几何变换示例");
    init();
    glutDisplayFunc(display);
    glutReshapeFunc(reshape);
    glutMainLoop();
    return 0;
}

镜面反射

// 提示：在合适的地方修改或添加代码
#include <GL/glut.h>
#include<stdlib.h>

using namespace std;
// 评测代码所用头文件-结束

void init(void)
{
    GLfloat position[] = { 0.0,3.0,2.0,0.0 };
    GLfloat ambient[] = { 0.0,0.0,0.0,1.0 };
    GLfloat diffuse[] = { 1.0,1.0,1.0,1.0 };
    GLfloat specular[] = { 1.0,1.0,1.0,1.0 };
    GLfloat lmodel_ambient[] = { 0.4,0.4,0.4,1.0 };
    GLfloat local_view[] = { 0.0 };

    glClearColor(0.0, 0.1, 0.1, 0.0);
    glShadeModel(GL_SMOOTH);

    glLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
    glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse);
    glLightfv(GL_LIGHT0, GL_POSITION, position);
    glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lmodel_ambient);
    glLightModelfv(GL_LIGHT_MODEL_LOCAL_VIEWER, local_view);

    glEnable(GL_LIGHTING);
    glEnable(GL_LIGHT0);
    glEnable(GL_DEPTH_TEST);

}
void display(void)
{
    GLfloat no_mat[] = { 0.0,0.0,0.0,1.0 };                     //没有光
    GLfloat mat_ambient[] = { 0.7,0.7,0.7,1.0 };                //环境光
    GLfloat mat_ambient_color[] = { 0.8, 0.8, 0.2, 1.0 };       //彩色环境光 
    GLfloat mat_diffuse[] = { 0.1,0.5,0.8,1.0 };                //漫反射
    GLfloat mat_specular[] = { 1.0,1.0,1.0,1.0 };               //镜面反射
    GLfloat no_shininess[] = { 0.0 };                         //没有镜面反射
    GLfloat low_shininess[] = { 5.0 };                          //低镜面反射
    GLfloat high_shininess[] = { 100.0 };                       //高镜面反射
    GLfloat mat_emission[] = { 0.3,0.2,0.2,0.0 };               //材料辐射光颜色 

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glClearColor(0.0, 0.1, 0.1, 0.0);
    glPushMatrix();
    glTranslatef(-3.0, 0.0, 0.0);
    // 请在此添加你的代码，左侧圆球有环境光、漫反射镜面低反射
    /********** Begin ********/
    glMaterialfv(GL_FRONT, GL_AMBIENT, mat_ambient);
    glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuse);
    glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
    glMaterialfv(GL_FRONT, GL_SHININESS, low_shininess);
    /********** End *********/
    glutSolidSphere(1.0, 50, 50);
    glPopMatrix();

    glPushMatrix();
    // 请在此添加你的代码，中间圆球有环境光、漫反射镜面高反射
    /********** Begin ********/

    glMaterialfv(GL_FRONT, GL_AMBIENT, mat_ambient);
    glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuse);
    glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
    glMaterialfv(GL_FRONT, GL_SHININESS, high_shininess);
    /********** End *********/
    glutSolidSphere(1.0, 50, 50);
    glPopMatrix();

    glPushMatrix();
    glTranslatef(3.0, 0.0, 0.0);
    // 请在此添加你的代码，右侧圆球有彩色环境光、漫反射、镜面高反射和材料辐射
    /********** Begin ********/

    glMaterialfv(GL_FRONT, GL_AMBIENT, mat_ambient_color);
    glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuse);
    glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
    glMaterialfv(GL_FRONT, GL_SHININESS, high_shininess);
    glMaterialfv(GL_FRONT, GL_EMISSION, mat_emission);

    /********** End *********/
    glutSolidSphere(1.0, 50, 50);
    glPopMatrix();


 
    glFlush();
    //glutPostRedisplay();
}

void reshape(int w, int h)
{
    glViewport(0, 0, (GLsizei)w, (GLsizei)h);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluPerspective(60.0, (GLfloat)w / (GLfloat)h, 1.0, 20.0);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
    gluLookAt(0.0, 5.0, 5.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);
}





int main(int argc, char* argv[])
{
    GLubyte* pPixelData = (GLubyte*)malloc(800 * 600 * 3);//分配内存
    GLint viewport[4] = { 0 };
    glutInit(&argc, argv);
    glutInitWindowPosition(100, 100);
    glutInitWindowSize(800, 600);
    glutCreateWindow("几何变换示例");
    init();
    glutDisplayFunc(display);
    glutReshapeFunc(reshape);
    glutMainLoop();

   
    return 0;
}

茶壶光照

// 提示：在合适的地方修改或添加代码
#include <GL/glut.h>
#include<stdlib.h>

using namespace std;
// 评测代码所用头文件-结束

//定义左边茶壶材质系数 
GLfloat left_ambient[] = { 5.0f, 0.0f, 0.0f, 1.0f };
GLfloat left_diffuse[] = { 0.8f, 0.8f, 0.0f, 1.0f };
GLfloat left_specular[] = { 1.0f, 1.0f, 0.0f, 1.0f };
GLfloat left_emission[] = { 0.1f, 0.0f, 0.0f, 1.0f };

//定义中间茶壶材质系数  
GLfloat mid_ambient[] = { 0.0f, 0.2f, 0.0f, 1.0f };
GLfloat mid_diffuse[] = { 0.0f, 0.8f, 0.0f, 1.0f };
GLfloat mid_specular[] = { 0.0f, 1.0f, 0.0f, 1.0f };
GLfloat mid_shininess[] = { 80.0f };
GLfloat mid_emission[] = { 0.0f, 0.1f, 0.0f, 1.0f };

//定义右边茶壶材质系数
GLfloat right_ambient[] = { 0.0f, 0.0f, 0.1f, 1.0f };
GLfloat right_diffuse[] = { 0.0f, 0.0f, 0.8f, 1.0f };
GLfloat right_specular[] = { 0.0f, 0.0f, 0.9f, 1.0f };
GLfloat right_shininess[] = { 50.0f };
GLfloat right_emission[] = { 0.0f, 0.1f, 0.0f, 1.0f };

void myInit(void)
{

    GLfloat light_position[] = { 1.0, 1.0, 1.0, 0.0 };
    GLfloat white_light[] = { 1.0, 1.0, 1.0, 1.0 };
    GLfloat light_ambient[] = { 0.2 , 0.2 , 0.2 , 1.0 };


    glClearColor(0.0, 0.0, 0.0, 0.0);
    glShadeModel(GL_SMOOTH);

    glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient);
    glLightfv(GL_LIGHT0, GL_POSITION, light_position);
    glLightfv(GL_LIGHT0, GL_DIFFUSE, white_light);
    glLightfv(GL_LIGHT0, GL_SPECULAR, white_light);
    glEnable(GL_LIGHTING);
    glEnable(GL_LIGHT0);
    glEnable(GL_DEPTH_TEST);

}

void myDisplay(void)
{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();
    // 请在此添加你的代码，中间茶壶
    /********** Begin ********/
    glMaterialfv(GL_FRONT, GL_AMBIENT, mid_ambient);
    glMaterialfv(GL_FRONT, GL_DIFFUSE, mid_diffuse);
    //glMaterialfv(GL_FRONT, GL_SPECULAR, mid_specular);
    //glMaterialfv(GL_FRONT, GL_SHININESS, mid_shininess);
    glMaterialfv(GL_FRONT, GL_EMISSION, mid_emission);

    /********** End *********/
    glutSolidTeapot(0.5);
    glPopMatrix();
    glFlush();


    glPushMatrix();
    glTranslatef(2.0, 0.0, 0.0);
    // 请在此添加你的代码,右边茶壶
    /********** Begin ********/

    glMaterialfv(GL_FRONT, GL_AMBIENT, right_ambient);
    glMaterialfv(GL_FRONT, GL_DIFFUSE, right_diffuse);
    glMaterialfv(GL_FRONT, GL_SPECULAR, right_specular);
    glMaterialfv(GL_FRONT, GL_SHININESS, right_shininess);
    glMaterialfv(GL_FRONT, GL_EMISSION, right_emission);

    /********** End *********/
    glutSolidTeapot(0.5);
    glPopMatrix();
    glFlush();


    glPushMatrix();
    glDisable(GL_LIGHT0);
    glTranslatef(-2.0, 0.0, 0.0);
    // 请在此添加你的代码，左边茶壶
    /********** Begin ********/


    glMaterialfv(GL_FRONT, GL_AMBIENT, left_ambient);
    //glMaterialfv(GL_FRONT, GL_DIFFUSE, left_diffuse);
    //glMaterialfv(GL_FRONT, GL_SPECULAR, left_specular);
    glMaterialfv(GL_FRONT, GL_EMISSION, left_emission);
    /********** End *********/
    glutSolidTeapot(0.5);
    glPopMatrix();
    glFlush();


}



void myReshape(int w, int h)
{
    glViewport(0, 0, (GLsizei)w, (GLsizei)h);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    if (w <= h)
        glOrtho(-1.5, 1.5, -1.5 * (GLfloat)h / (GLfloat)w,
            1.5 * (GLfloat)h / (GLfloat)w, -10.0, 10.0);
    else
        glOrtho(-1.5 * (GLfloat)w / (GLfloat)h,
            1.5 * (GLfloat)w / (GLfloat)h, -1.5, 1.5, -10.0, 10.0);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
}

int main(int argc, char* argv[])
{

    glutInit(&argc, argv);
    glutInitWindowPosition(100, 100);
    glutInitWindowSize(1000, 400);
    glutCreateWindow("几何变换示例");
    myInit();
    glutDisplayFunc(myDisplay);
    glutReshapeFunc(myReshape);
    glutMainLoop();

   
    return 0;
}

QUOTE

光照属性
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