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week05

http://www.cmlab.csie.ntu.edu.tw/~jsyeh/3dcg10/

下載win32 、data 、glut32.dil

windows、data解壓縮 , data、glut32.dil放入windows


Light Material

ctrl+F 收尋 light

來練習打光~

如何讓光可以移動!!!(加入)

接下來要改變視窗大小,物體會等比例放大縮小!!!!(加入)

程式碼 :

#include <GL/glut.h>

///打光0 : 宣告陣列,裡面是光的屬性值

const GLfloat light_ambient[]  = { 0.0f, 0.0f, 0.0f, 1.0f };

const GLfloat light_diffuse[]  = { 1.0f, 1.0f, 1.0f, 1.0f };

const GLfloat light_specular[] = { 1.0f, 1.0f, 1.0f, 1.0f };

const GLfloat light_position[] = { 2.0f, 5.0f, 5.0f, 0.0f };

const GLfloat mat_ambient[]    = { 0.7f, 0.7f, 0.7f, 1.0f };

const GLfloat mat_diffuse[]    = { 0.8f, 0.8f, 0.8f, 1.0f };

const GLfloat mat_specular[]   = { 1.0f, 1.0f, 1.0f, 1.0f };

const GLfloat high_shininess[] = { 100.0f };

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glutSolidTeapot(0.3);

    glutSwapBuffers();

}

void motion(int x, int y)

{

    GLfloat light_position[] = {2.0f , 5.0f, 5.0f ,0.0f};

    light_position[0] = (x-150)/150.0 * 10;

    light_position[1] = -(y-150)/150.0 * 10;

    glLightfv(GL_LIGHT0, GL_POSITION, light_position);

    glutPostRedisplay();

}

static void resize(int width, int height)註:

{

    const float ar = (float) width/ (float)height;

    glViewport(0,0,width,height);

    glMatrixMode(GL_PROJECTION);

    glLoadIdentity();

    glOrtho(-ar,ar,-1,+1,-1,+1);

    glMatrixMode(GL_MODELVIEW);

    glLoadIdentity();

}

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

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("GLUT Shapes");

    glutReshapeFunc(resize);//Reshape改視窗大小的函式

    glutDisplayFunc(display);

    glutMotionFunc(motion);

    ///打光要3D的depth test

    glEnable(GL_DEPTH_TEST);

    ///打光1 : 打開光線

    glEnable(GL_LIGHT0);

    glEnable(GL_NORMALIZE);

    glEnable(GL_COLOR_MATERIAL);

    glEnable(GL_LIGHTING);

    ///打光2 : 設定light值

    glLightfv(GL_LIGHT0, GL_AMBIENT,  light_ambient);

    glLightfv(GL_LIGHT0, GL_DIFFUSE,  light_diffuse);

    glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular);

    glLightfv(GL_LIGHT0, GL_POSITION, light_position);

    ///打光 2-2 : 設定物體material

    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);

    glutMainLoop();

    return EXIT_SUCCESS;

}

完成啦!!!