glPushMatrix();///備份矩陣
glRotatef(angle,x,y,z);旋轉
glTranslatef(x,y,z);移動
glScalef(x,y,z);縮放
glBegin(GL_POLYGON);開始畫
glNormal3f(nx,ny,nz);打光的法向量
glTexCoord2f(tx,ty);,貼圖座標
glColor3f(r,g,b);顏色
glVertex3f(x,y,z);頂點
glEnd();結束畫
glPopMatrix;還原矩陣
T-R-T 轉茶壺
#include <GL/glut.h>
float mouseX=0;
void display()
{
glClear(GL_COLOR_BUFFER_BIT |GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glRotatef(mouseX,0,0,1);
glColor3f(1,0,0);
glutSolidTeapot(0.3);
glPushMatrix();
glTranslatef(0.5,0.14,0);
glRotatef(mouseX, 0,0,1);
glTranslatef(0.41, -0.05,0);
glColor3f(1,1,1);
glutSolidTeapot(0.3);
glPopMatrix();
glPopMatrix();
glutSwapBuffers();
}
void motion(int x, int y)
{
mouseX = x;
glutPostRedisplay();
}
int main(int argc, char**argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_RGB|GLUT_DOUBLE|GLUT_DEPTH);
glutCreateWindow("TRT robot");a
glutDisplayFunc(display);
glutMotionFunc(motion);
glutMainLoop();
}
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