Week03 Allen這週努力變帥

1.

TRAIN_FAN

GL_LINE

GL_LINE_LOOP

POINTS

GL_POLYGON

GL_QUADS

GL_QUAD_STRIP

LINE_STRIP

GL_TRIANGLE_STRIP

GL_TRIANGLES

2.

Codeblock用程式畫三角形

程式碼:

1.  自己做一個三角形(同一個顏色)。

#include <GL/glut.h>
void display()
{
    glBegin(GL_POLYGON);
        glColor3f(0.5, 0.0, 0.3);
        glVertex3f(0.0, 0.0, 0.0);
        glVertex3f(1.0, 0.0, 0.0);
        glVertex3f(1.0, 1.0, 1.0);
    glEnd();
    glutSwapBuffers();
}
int main(int argc, char **argv)
{
    glutInit(&argc,argv);
    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
    glutCreateWindow("hello");
    glutDisplayFunc(display);
    glutMainLoop();
}

2.  三個點不同顏色
程式碼:
#include <GL/glut.h>
void display()
{
    glBegin(GL_POLYGON);
        glColor3f(0.5, 0.0, 0.3);
        glColor3f(0.5, 0.0, 0.5);  glVertex3f(0.0, 0.0, 0.0);
        glColor3f(1.0, 0.0, 0.3);  glVertex3f(1.0, 0.0, 0.0);
        glColor3f(0.0, 0.5, 0.3);  glVertex3f(1.0, 1.0, 1.0);
    glEnd();
    glutSwapBuffers();
}
int main(int argc, char **argv)
{
    glutInit(&argc,argv);
    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
    glutCreateWindow("hello");
    glutDisplayFunc(display);
    glutMainLoop();
}

3.  更改背景顏色，glClearColor(0.0, 0.8, 0.5, 1)，
最後要加一個  1 。
程式碼:
#include <Gl/glut.h>
void display()
{
    glClearColor(0.0, 0.8, 0.5, 1);
    glClear(GL_COLOR_BUFFER_BIT);
    glBegin(GL_POLYGON);
        glColor3f(0.5, 0.0, 0.3);
        glColor3f(0.5, 0.0, 0.5);  glVertex3f(0.0, 0.0, 0.0);
        glColor3f(1.0, 0.0, 0.3);  glVertex3f(1.0, 0.0, 0.0);
        glColor3f(0.0, 0.5, 0.3);  glVertex3f(1.0, 1.0, 1.0);
    glEnd();
    glutSwapBuffers();
}
int main(int argc, char **argv)
{
    glutInit(&argc,argv);
    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
    glutCreateWindow("hello");
    glutDisplayFunc(display);
    glutMainLoop();
}

小畫家輔助

void display()
{
glBegin(GL_POLYGON);
glColor3f(1,1,0);
glVertex3f(0,0,0);
glVertex3f(0,1,0);
glVertex3f(1,1,0);
glEnd();
glSwapBuffers();
}