Lm's 圖學筆記 week02

 

#include <GL/glut.h>

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glColor3f(1,0,0);  ///顏色 R G B

    glutSolidTeapot(0.3);

    glutSwapBuffers();

}

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

{

    glutInit(&argc, argv);

    glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week02 08373056!");

    glutDisplayFunc(display);

    glutMainLoop();

}

#include <GL/glut.h>

void display()

{

  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

  glBegin(GL_LINE_LOOP);

   glColor3f(1.0f, 0.0f, 0.0f);   glVertex2f(0.0f,   1.0f);

   glColor3f(0.0f, 1.0f, 0.0f);   glVertex2f(0.87f,  -0.5f);

   glColor3f(0.0f, 0.0f, 1.0f);   glVertex2f(-0.87f, -0.5f);

  glEnd();

    glColor3f(0.5,1,0.2); ///顏色

  glutSolidTeapot(0.3);

  glutSwapBuffers();

}

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

{

    glutInit(&argc, argv);

    glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week02 08373056!");

    glutDisplayFunc(display);

    glutMainLoop();

}

GL_LINE_LOOP

 

改成 glBegin(GL_TRIANGLES);

 

GL_TRIANGLES

#include <GL/glut.h>

#include <math.h> ///數學的外掛cos() sin()

void display()

{

  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

  glBegin(GL_POLYGON);

   glColor3f(1.0f, 0.0f, 0.0f);

   for(float angle=0; angle<3014159265358979*2; angle+=0.01){

    glVertex2f( 0.5*cos(angle), 0.5*sin(angle) );///Vertex=頂點

   }

  glEnd();

    glColor3f(0.5,1,0.2); ///顏色

  glutSolidTeapot(0.3);

  glutSwapBuffers();

}

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

{

    glutInit(&argc, argv);

    glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week02 08373056!");

    glutDisplayFunc(display);

    glutMainLoop();

}