图形学实验报告(9)

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

glutInit(&argc, argv);

glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH); glutInitWindowSize (500, 500); glutInitWindowPosition (100, 100); glutCreateWindow (argv[0]); init ();

glutDisplayFunc(display); glutReshapeFunc(reshape); glutMouseFunc(mouse); glutKeyboardFunc(keyboard); glutMainLoop(); return 0; }

正面：

旋转后：

5、显示列表

实现用显示列表输出文字和图形。 //该程序的功能是演示显示列表的用法 #include

#define WIDTH 400 #define HEIGHT 400

#include #define ColoredVertex(c, v) do{ glColor3fv(c); glVertex3fv(v); }while(0)

GLfloat angle = 0.0f;

void myDisplay(void) {

static int list = 0; if( list == 0 )

{

// 如果显示列表不存在，则创建 /* GLfloat

PointA[] = {-0.5, -5*sqrt(5)/48, sqrt(3)/6}, PointB[] = { 0.5, -5*sqrt(5)/48, sqrt(3)/6}, PointC[] = { 0, -5*sqrt(5)/48, -sqrt(3)/3},

PointD[] = { 0, 11*sqrt(6)/48, 0}; */

GLfloat

PointA[] = { 0.5f, -sqrt(6.0f)/12, -sqrt(3.0f)/6}, PointB[] = {-0.5f, -sqrt(6.0f)/12, -sqrt(3.0f)/6}, PointC[] = { 0.0f, -sqrt(6.0f)/12, sqrt(3.0f)/3}, PointD[] = { 0.0f, sqrt(6.0f)/4, 0}; GLfloat

ColorR[] = {1, 0, 0}, ColorG[] = {0, 1, 0}, ColorB[] = {0, 0, 1}, ColorY[] = {1, 1, 0};

list = glGenLists(1);

glNewList(list, GL_COMPILE); glBegin(GL_TRIANGLES); // 平面ABC

ColoredVertex(ColorR, PointA); ColoredVertex(ColorG, PointB); ColoredVertex(ColorB, PointC); // 平面ACD

ColoredVertex(ColorR, PointA); ColoredVertex(ColorB, PointC); ColoredVertex(ColorY, PointD); // 平面CBD

ColoredVertex(ColorB, PointC); ColoredVertex(ColorG, PointB); ColoredVertex(ColorY, PointD); // 平面BAD

ColoredVertex(ColorG, PointB); ColoredVertex(ColorR, PointA); ColoredVertex(ColorY, PointD); glEnd(); glEndList();

glEnable(GL_DEPTH_TEST); }

// 已经创建了显示列表，在每次绘制正四面体时将调用它 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glPushMatrix();

glRotatef(angle, 1, 0.5, 0); glCallList(list); glPopMatrix(); glutSwapBuffers(); }

void myIdle(void) {

++angle;

if( angle >= 360.0f ) angle = 0.0f; myDisplay(); }

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

glutInit(&argc, argv);

glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE); glutInitWindowPosition(200, 200); glutInitWindowSize(WIDTH, HEIGHT); glutCreateWindow(\窗口\ glutDisplayFunc(&myDisplay); glutIdleFunc(&myIdle); glutMainLoop(); return 0; }

6、纹理映射

将纹理图像映射到物体表面。